CN1717889A - 多天线通信系统的发送分集处理 - Google Patents
多天线通信系统的发送分集处理 Download PDFInfo
- Publication number
- CN1717889A CN1717889A CNA2003801045546A CN200380104554A CN1717889A CN 1717889 A CN1717889 A CN 1717889A CN A2003801045546 A CNA2003801045546 A CN A2003801045546A CN 200380104554 A CN200380104554 A CN 200380104554A CN 1717889 A CN1717889 A CN 1717889A
- Authority
- CN
- China
- Prior art keywords
- data
- code element
- code
- stream
- ofdm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims description 17
- 238000012545 processing Methods 0.000 title abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 49
- 239000013598 vector Substances 0.000 claims description 42
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000012546 transfer Methods 0.000 claims description 17
- 238000013507 mapping Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 15
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000009432 framing Methods 0.000 description 6
- 125000004122 cyclic group Chemical group 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000021615 conjugation Effects 0.000 description 4
- 238000012217 deletion Methods 0.000 description 4
- 230000037430 deletion Effects 0.000 description 4
- 230000003252 repetitive effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010606 normalization Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- KLDZYURQCUYZBL-UHFFFAOYSA-N 2-[3-[(2-hydroxyphenyl)methylideneamino]propyliminomethyl]phenol Chemical compound OC1=CC=CC=C1C=NCCCN=CC1=CC=CC=C1O KLDZYURQCUYZBL-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 201000001098 delayed sleep phase syndrome Diseases 0.000 description 1
- 208000033921 delayed sleep phase type circadian rhythm sleep disease Diseases 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
- H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0067—Rate matching
- H04L1/0068—Rate matching by puncturing
- H04L1/0069—Puncturing patterns
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0093—Point-to-multipoint
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/20—Negotiating bandwidth
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Quality & Reliability (AREA)
- Radio Transmission System (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Error Detection And Correction (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
对于多天线OFDM系统中的发送分集,发射机对话务数据进行编码、交织和码元映射以得出数据码元。发射机处理每一对数据码元以得出两对发送码元,用于在(1)对于空时发送分集的两个OFDM码元周期内或者(2)对于空频发送分集的两个子带上,从一对天线发出。数据传输使用了NT·(NT-1)/2个不同的天线对,为相邻的子带使用不同的天线对,其中NT是天线数目。系统可以支持多个OFDM码元尺寸。为不同的OFDM码元尺寸使用相同的编码、交织和调制方案来简化发射机和接收机处理。发射机按照所选的OFDM码元尺寸对每根天线的发送码元流进行OFDM调制。接收机执行相反的处理。
Description
I.根据35U.S.C.§119
本专利申请要求第60/421,309号临时申请的优先权,后者题为“MIMO WLANSystem”,于2002年10月25日提交,被转让给本发明的受让人并且通过引用被结合于此。
背景
I.技术领域
本发明一般涉及通信,尤其涉及为多天线通信系统中的发送分集处理数据的技术。
II.背景技术
多天线通信系统采用了多根(NT)发送天线以及一根或多根(NR)接收天线进行数据传输。NT根发送天线可用来通过从这些天线发出独立的数据流而提高系统吞吐量。NT根发送天线也可以用来通过从这些天线发出单个数据流而改进可靠性。
多天线系统也可以使用正交频分复用(OFDM)。OFDM是有效地把总系统带宽分成多个(NF)正交子带的调制技术。每个子带与可以用数据调制的一个相应子载波相关联。子带也称为音调、子载波、频段以及频率信道。
对于多天线系统,在每一对发送和接收天线之间存在一传播路径。在NT根发送天线和NR根接收天线之间形成了NT·NR条传播路径。这些传播路径会经受不同的信道条件(例如不同的衰落、多径和干扰效应)并且可能实现不同的信号对噪声和干扰比(SNR)。因此,NT·NR条传播路径的信道响应会随着路径的改变而改变。对于一分散的通信信道,各条传播路径的信道响应也在NF个子带间改变。由于信道条件会随时间改变,因此传播路径的信道响应也会类似地改变。
发送分集是指在空间、频率、时间或者这三维的组合上冗余的数据传输,以便提高数据传输的可靠性。发送分集的一个目标是使数据传输的分集在尽可能多的维数上最大,以便实现稳健的性能。另一目标是简化发射机和接收机处发送分集的处理。因此,本领域中需要能为多天线系统中的发送分集有效处理数据的技术。
发明内容
这里提供了用于在多天线OFDM系统中执行发送分集处理的技术。发射机按照一编码方案来编码话务数据以得出经编码的数据。编码方案可以包括一固定速率基码以及对于系统所支持的一组编码速率的一组重复和/或截短模式。发射机按照一交织方案来交织经编码的数据以得出经交织的数据。发射机接着按照一调制方案对经交织的数据进行码元映射以得出一数据码元流。系统可以支持多个OFDM码元尺寸以实现改进的效率。可以为不同的OFDM码元尺寸使用相同或类似的编码、交织和调制方案以简化发射机和接收机处的处理。
发射机处理每一对数据码元以得出用于从一对发送天线发出的两对发送码元。每个发送码元都是数据码元的一个版本。两对发送码元可以在以下子带上从一对天线发出:(1)对于空时发送分集(STTD)的两个OFDM码元周期内的同一子带上、或者(2)对于空频发送分集(SFTD)的同一OFDM码元周期的两个子带上。如果NT根发送天线可用于数据传输,则可以使用NT·(NT-1)/2根不同的天线对来发送数据码元流。发射机按照所选的OFDM码元尺寸对每根发送天线的发送码元流进行变换(例如对其执行OFDM调制),以便为该发送天线得出一相应的OFDM码元流。
接收机执行相反的处理以恢复话务数据,如下所述。下面进一步详述本发明的各个方面和实施例。
附图说明
图1示出多天线OFDM系统中的一接入点和两个用户终端;
图2示出接入点的发射机部份;
图3示出一编码器;
图4示出一重复/截短单元和一信道交织器;
图5示出一子带天线分配方案;
图6示出STTD方案的发送(TX)空间处理器;
图7示出SFTD方案的发送空间处理器;
图8示出一调制器;
图9示出具有多根天线的用户终端;
图10示出用于在发射机处执行发送分集处理的过程;以及
图11示出在接收机处以发送分集进行数据接收的过程。
具体实施方式
这里使用单词“示例性”意指“充当示例、实例或说明”。这里描述为“示例性”的任何实施例都不必被视为比其它实施例更为优选或有利。
这里所述的发送分集处理技术可用于(1)具有多根发送天线和单根接收天线的多输入单输出(MISO)系统、以及(2)具有多根发送天线和多根接收天线的多输入多输出(MIMO)系统。这些技术可用于下行链路以及上行链路。下行链路(即前向链路)是从接入点(例如基站)到用户终端(例如移动站)的通信链路,上行链路(即反向链路)是指从用户终端到接入点的通信链路。为了清楚,在使用OFDM的示例性多天线系统中为下行链路描述了这些技术。对于该示例性系统,接入点带有四根天线,每个用户终端都带有一根或多根天线。
图1示出多天线OFDM系统100中一接入点110以及两个用户终端150x和150y的实施例框图。用户终端150x带有单根天线152x,用户终端150y带有多根天线152a到152r。
在下行链路上,在接入点110处,发送(TX)数据处理器120接收来自数据源112的话务数据(例如信息比特)、来自控制器130的控制数据、以及可能来自调度器134的其它数据。各类数据可以在不同的传输信道上发送。发送数据处理器120基于一个或多个编码和调制方案来处理(例如组帧、扰乱、编码、交织和码元映射)不同类型的数据以得出一调制码元流。如这里所使用的,“数据码元”是指数据的调制码元,“导频码元”是指导频的调制码元。发送空间处理器122从发送数据处理器120接收数据码元流、对于发送分集对数据码元进行空间处理、在导频码元中多路复用、以及为每根发送天线提供一发送码元流。下面描述了发送数据处理器120和发送空间处理器122的处理。
各个调制器(MOD)126接收并处理一相应的发送码元流以得出一OFDM码元流,并进一步调节(例如放大、滤波和下变频)该OFDM码元流以生成一下行链路信号。来自四个调制器126a到126d的四个下行链路信号分别从四根天线128a到128d被发送到用户终端。
在各个用户终端150处,一根或多根天线152接收所发出的下行链路信号,每根天线把一接收信号提供给一相应的解调器(DEMOD)154。各个解调器154执行与调制器126处的处理相反的处理,并且提供一接收码元流。接收(RX)空间处理器160对来自全部解调器154的接收码元流进行空间处理以得出一经恢复的数据码元流,该经恢复的数据码元流是接入点110所发送的数据码元流的估计。接收数据处理器170接收经恢复的数据码元并将其多路分解到其相应的传输信道中。然后,各个传输信道的经恢复的数据码元都被处理(例如解映射、解交织、解码和解扰)以得出该传输信道的经解码数据。各个传输信道的经解码数据可以包括经恢复的用户数据、控制数据等等,它们可以被提供给数据宿172用于存储以及/或者被提供给控制器180用于进一步处理。
在各个用户终端150处,信道估计器(图1未示出)都估计下行链路信道响应并且提供信道估计,所述信道估计可以包括信道增益(或路径增益)估计、SNR估计等等。接收数据处理器170也可以提供下行链路上接收到的各个分组/帧的状态。控制器180接收信道估计和分组/帧状态并且收集接入点110的反馈信息。反馈信息和上行链路数据由发送数据处理器190处理、由发送空间处理器192(如果在用户终端150处存在)进行空间处理、与导频码元多路复用、由一个或多个调制器154调节、并且经由一根或多根天线152被发送到接入点110。
在接入点110处,所发送的上行链路信号被天线128所接收、被解调器126解调、并且由接收空间处理器140和接收数据处理器142以与用户终端150的处理相反的方式进行处理。经恢复的反馈信息被提供给控制器130和调度器134。调度器134可以使用反馈信息来执行多个功能,比如(1)调度一组用户终端用于下行链路和上行链路上的数据传输,以及(2)为所调度的终端分配可用的下行链路和上行链路资源。
控制器130和180分别控制接入点110和用户终端150处各个处理单元的操作。例如,控制器180可以确定下行链路为用户终端150支持的最大速率。控制器130可以为各个所调度的用户终端选择速率、有效负载尺寸以及OFDM码元尺寸。
接入点110和用户终端150处对于上行链路的处理可以与下行链路的处理相同或不同。
系统100使用一组传输信道来发送不同类型的数据。在一示例性设计中,在下行链路上,接入点110在广播信道(BCH)上发送系统信息、在前向控制信道(FCCH)上发送控制数据、以及在前向信道(FCH)上把话务数据发送到特定的用户终端。在上行链路上,用户终端150在随机接入信道(RACH)上发送接入数据和消息,在反向信道(RCH)上发送话务数据。其它系统设计可以使用不同的和/或其它的传输信道。可以为各个传输信道使用发送分集。
图2示出接入点110的发射机部份的框图。在发送数据处理器120内,组帧单元212格式化各个数据分组,例如通过生成一循环冗余校验(CRC)值并且为分组附着一报头。CRC值由接收机用来确定分组是被正确解码还是被错误解码。组帧可以对一些传输信道执行,而对其它传输信道省略。组帧也可以对于不同的传输信道而不同。各个分组被分开地编码和调制,并且被指定在一特定持续时间(例如一个或多个OFDM码元周期)内进行传输。扰乱器214扰乱经组帧的/未组帧的数据以便使数据随机化。
编码器216按照一编码方案对经扰乱的数据进行编码并且提供编码比特。编码提高了数据传输的可靠性。然后,重复/截短单元218重复或截短(即删除)一些编码比特以便得出各个分组的期望编码速率。在一实施例中,编码器216是一速率为1/2的二进制卷积编码器。通过把每个编码比特重复一次可以得出编码速率1/4。通过从编码器216删除一些编码比特可以得出大于1/2的编码速率。交织器220基于一交织方案对来自重复/截短单元218的编码比特进行交织(即重排)。交织为编码比特提供了时间、频率和/或空间分集。
码元映射单元222按照所选的调制方案来映射经交织的数据并且提供数据码元。码元映射可以如下实现:(1)组合B位的组以形成B位二进制值,其中B≥1,以及(2)把每个B位二进制值映射到与所选调制方案相对应的信号群中的一点。每个经映射的信号点都是复数值的,并且对应于一数据码元。码元映射单元222把一数据码元流提供给发送空间处理器122。
下面描述编码器216、重复/截短单元218、交织器222和码元映射单元222的示例性设计。编码、交织和码元映射可以基于控制器130所提供的控制信号来执行。
发送空间处理器122从发送数据处理器120接收数据码元流,并且如下所述为发送分集执行空间处理。发送空间处理器122把一个发送码元流提供给四根发送天线的四个调制器126a到126d的每一个。
图3示出编码器216的实施例,编码器216实现了系统的基码。在该实施例中,基码的速率为1/2,约束长度为7(K=7),卷积码的生成器为133和171(八进制)。
在编码器216内,多路复用器312从扰乱器214接收各个分组的经扰乱比特以及尾比特(例如零值),并且提供经扰乱的比特,后面是六个尾比特。编码器216还包括串联耦合的六个延迟元件314a到314f。四个加法器316a到316d也串联耦合,并且用来实现第一生成器(133)。类似地,四个加法器318a到318d串联耦合并且用来实现第二生成器(171)。加法器进一步以实现两个生成器133和171的方式耦合到延迟元件314,如图3所示。
经扰乱的比特被提供给第一延迟元件314a以及加法器316a和318a。对于每个时钟周期,加法器316a到316d对到来的比特以及延迟元件314b、314c、314e和314f中保存的四个先前比特进行模2加,以得出该时钟周期的第一编码比特。类似地,加法器318a到318d对到来的比特以及延迟元件314a、314b、314c和314f中保存的四个先前比特进行模2加,以得出该时钟周期的第二编码比特。多路复用器320从两个生成器接收两个编码比特流,并将其多路复用成单个编码比特流。对于每个经扰乱的比特qn,其中n是比特索引,生成了两个编码比特c1n和c2n,导致编码速率为1/2。
系统100支持用于数据传输的一组“速率”。表1列出系统所支持的一组示例性的14个速率,它们由速率索引0到13来标识。索引为0的速率是空数据速率(即没有数据传输)。每一个非零的速率都与为非衰落AWGN信道实现期望性能级别(例如1%的分组误差率(PER))所需的特定频谱效率、特定编码速率、特定调制方案以及特定的最小SNR相关联。频谱效率是指由系统带宽标准化的数据速率(即信息比特率),单位为每秒每赫兹的比特数(bps/Hz)。各个速率的频谱效率由该速率的编码方案和调制方案确定。表1中各个速率的编码速率和调制方案对于示例性的系统是特殊的。
表1
短OFDM码元 | 长OFDM码元 | |||||||
速率索引 | 频谱效率(bps/Hz) | 编码速率 | 调制方案 | 所需SNR(dB) | 信息比特/OFDM码元 | 编码比特/OFDM码元 | 信息比特/OFDM码元 | 编码比特/OFDM码元 |
0 | 0.00 | - | - | - | 0 | 0 | 0 | 0 |
1 | 0.25 | 1/4 | BPSK | -1.8 | 12 | 48 | 48 | 192 |
2 | 0.5 | 1/2 | BPSK | 1.2 | 24 | 48 | 96 | 192 |
3 | 1.0 | 1/2 | QPSK | 4.2 | 48 | 96 | 192 | 384 |
4 | 1.5 | 3/4 | QPSK | 6.8 | 72 | 96 | 288 | 384 |
5 | 2.0 | 1/2 | 16QAM | 10.1 | 96 | 192 | 384 | 768 |
6 | 2.5 | 5/8 | 16QAM | 11.7 | 120 | 192 | 480 | 768 |
7 | 3.0 | 3/4 | 16QAM | 13.2 | 144 | 192 | 576 | 768 |
8 | 3.5 | 7/12 | 64QAM | 16.2 | 168 | 288 | 672 | 1152 |
9 | 4.0 | 2/3 | 64QAM | 17.4 | 192 | 288 | 768 | 1152 |
10 | 4.5 | 3/4 | 64QAM | 18.8 | 216 | 288 | 864 | 1152 |
11 | 5.0 | 5/6 | 64QAM | 20.0 | 240 | 288 | 960 | 1152 |
12 | 6.0 | 3/4 | 256QAM | 24.2 | 288 | 384 | 1152 | 1536 |
13 | 7.0 | 7/8 | 256QAM | 26.3 | 336 | 384 | 1344 | 1536 |
表1中,BPSK表示二进制相移键控,QPSK表示四相移键控,QAM表示正交幅度调制。
编码器216基于单个基码对每个分组进行编码并且生成速率为1/2的编码比特。系统所支持的所有其它编码速率(如表1列出)可以通过或重复或截短编码比特来获得。
图4示出重复/截短单元218的一个实施例,该单元218可用来基于基码速率1/2生成各个编码速率。在重复/截短单元218内,来自编码器216的速率为1/2的编码比特或者被提供给重复单元412或者被提供给截短单元414。重复单元412把每个速率为1/2的编码比特重复一次以得出有效的编码速率1/4。截短单元414基于特定的截短模式删除一些速率为1/2的编码比特以得出期望的编码速率。表2列出可用于系统所支持的编码速率的示例性截短模式。也可以使用其它截短模式。
表2
编码速率 | 截短模式 |
1/2 | 11 |
7/12 | 11111110111110 |
5/8 | 1110111011 |
2/3 | 1110 |
3/4 | 111001 |
5/6 | 1110011001 |
7/8 | 11101010011001 |
对于编码速率k/n,对于每k个信息比特有n个经编码比特。速率为1/2的基码为每k个信息比特提供2k个速率为1/2的编码比特。为了得到编码速率k/n,截短单元218为从编码器216接收到的每个输入组的2k个速率1/2的编码比特输出n个编码比特。这样,从每组2k个速率1/2的编码比特中删除了2k-n个编码比特,以得到n个速率为k/n的编码比特。要从每组删除的编码比特由截短模式中的零值来表示。例如,为了得到编码速率7/12,从来自编码器216的每组14个编码比特中删除两个编码比特,所删除的比特是该组中的第8和第14个比特,如截短模式“11111110111110”所表示。如果期望的编码速率为1/2则不执行截短。
多路复用器416接收来自重复单元412的编码比特流以及来自截短单元414的编码比特流。如果期望的编码速率为1/4,多路复用器416就提供来自重复单元412的编码比特,如果期望的编码速率为1/2或更高,多路复用器416就提供来自截短单元414的编码比特。逻辑单元418接收编码控制并且为截短单元414生成一截短控制、为多路复用器416生成一多路复用器控制。
也可以使用除上述以外的其它编码方案和截短模式,这在本发明的范围内。例如,可以使用Turbo码、低密度奇偶校验(LDPC)码、块编码、一些其它码或者它们的任意组合来对数据进行编码。同样,可以为不同的传输信道使用不同的编码方案。例如,可以为传送系统信息和控制数据的传输信道使用卷积编码,而可以为传送话务数据的传输信道使用Turbo码。
根据上述的编码和截短方案,在接入点处的同一编码器和用户终端处的同一解码器可以支持多个编码速率。这会大大简化接入点和用户终端的设计。
系统100使用两个OFDM码元尺寸来实现较高的效率。在一示例性设计中,“短”OFDM码元由64个子带组成,“长”OFDM码元由256个子带组成。对于短OFDM码元,64个子带分配到索引-32到+31,48个子带(例如索引为KS=±{1,...,6,8,...,20,22,...,26})用于数据传输并且被称为数据子带,4个子带(例如索引为±{7,21})用于导频传输,DC子带(索引为0)未使用,其余子带也未使用并且充当保护子带。对于长OFDM码元,256个子带分配到索引-128到+127,192个子带(例如索引为KL=±{1,...,24,29,...,80,85,...,104})用于数据传输,16个子带(例如索引为±{25,...,28,81,...,84})用于导频传输,DC子带未使用,其余子带也未使用并且充当保护子带。
长OFDM码元的导频和数据子带可以基于以下条件被映射到短OFDM码元的导频和数据子带:
kl=4·ks-sgn(ks)·kos (1)
其中ks是短OFDM码元的子带索引(ks∈KS);
kos是子带索引偏移(kos∈{0,1,2,3});
sgn(ks)提供了ks的符号(即“+”或“-”);以及
kl是长OFDM码元的子带索引(kl∈KL)。短OFDM码元的各个数据/导频子带都与长OFDM码元的四个数据/导频子带相关联,后者与子带索引偏移kos的四个值相关联。
表1还列出对于各个非零速率可以在各个短和长的OFDM码元内发送的数据比特数。数据分组可以用任何数量的长OFDM码元和少量的短OFDM码元来发送。例如,数据分组可以用NL个长OFDM码元和NS个短OFDM码元来发送,其中NL≥0,3≥NS≥0。NL个长OFDM码元结尾处的NS个短OFDM码元降低了未使用容量的数量。因此,可以使用不同尺寸的OFDM码元使OFDM码元的数据传送容量与分组有效负载更好地匹配,从而使分组效率最大。
在一实施例中,为短和长的OFDM码元使用了同一交织方案。要在各个短OFDM码元内发送的编码比特在全部48个数据子带间交织。要在各个长OFDM码元内发送的编码比特被分成四个块,每块中的编码比特都在一组相应的48个数据子带间交织。这两种情况下,交织在一个OFDM码元周期上执行。
图4还示出交织器220的实施例,交织器220既可用于短OFDM码元又可用于长OFDM码元。在交织器220内,多路分解器422从重复/截短单元218为各个OFDM码元接收一编码比特序列。编码比特序列标记为{ci},其中对于短OFDM码元,i∈{0,...,48·B-1},对于长OFDM码元,i∈{0,...,192·B-1},B是各个调制码元的编码比特数。
对于短OFDM码元,多路复用器422在序列中把全部48·B个编码比特提供给块交织器424a。然后,块交织器424a按照表3所示的频率交织方案在短OFDM码元的48个数据子带间交织(即重排)编码比特。对于该交织方案,序列{ci}中的每个编码比特都分配到一比特索引:i模48。序列中的编码比特有效地被分成B组,每组包含分配到比特索引0到47的48个编码比特。每个比特索引与一相应的数据子带相关联。具有同一比特索引的所有编码比特都在与该比特索引相关的数据子带上被发送。例如,每组中的第一编码比特(比特索引为0)在子带-26上被发送,第二编码比特(比特索引为1)在子带1上被发送,第三编码比特(比特索引为2)在子带-17上被发送,依此类推。在交织了整个编码比特序列后,块交织器424a把经交织的比特提供给多路复用器426。对于短OFDM码元,块交织器424b、424c和424d未使用,多路复用器426仅从块交织器424a提供经交织的比特。
表3
子带索引kS | 比特索引 | 子带索引kS | 比特索引 | 子带索引kS | 比特索引 | 子带索引kS | 比特索引 |
- | - | -13 | 26 | 1 | 1 | 15 | 33 |
-26 | 0 | -12 | 32 | 2 | 7 | 16 | 39 |
-25 | 6 | -11 | 38 | 3 | 13 | 17 | 45 |
-24 | 12 | -10 | 44 | 4 | 19 | 18 | 5 |
-23 | 18 | -9 | 4 | 5 | 25 | 19 | 11 |
-22 | 24 | -8 | 10 | 6 | 31 | 20 | 17 |
-21 | - | -7 | - | 7 | - | 21 | - |
-20 | 30 | -6 | 16 | 8 | 37 | 22 | 23 |
-19 | 36 | -5 | 22 | 9 | 43 | 23 | 29 |
-18 | 42 | -4 | 28 | 10 | 3 | 24 | 35 |
-17 | 2 | -3 | 34 | 11 | 9 | 25 | 41 |
-16 | 8 | -2 | 10 | 12 | 15 | 26 | 47 |
-15 | 14 | -1 | 46 | 13 | 21 | - | - |
-14 | 20 | 0 | - | 14 | 27 | - | - |
对于长OFDM码元,多路分解器422在序列中把第一块48·B个编码比特提供给块交织器424a,把第二块48·B个编码比特提供给块交织器424b,把第三块48·B个编码比特提供给块交织器424c,以及把最后一块48·B个编码比特提供给块交织器424d。交织器424a到424d中的四块编码比特分别分配到子带索引偏移kos=0、1、2和3。各个块交织器424以上述对于短OFDM码元所述的方式在48个数据子带间交织其编码比特。在交织了整个编码比特序列后,多路复用器426从块交织器424a到424d接收经交织的比特,并以适当顺序把这些比特映射到长OFDM码元的相应子带。特别是,使用各个块交织器424的短OFDM码元子带索引ks和子带索引偏移kos来生成相应的长OFDM码元子带索引kl,如公式(1)所示。逻辑单元428从控制器130接收OFDM码元尺寸,并且为多路分解器422和多路复用器426生成控制。
图4示出信道交织器220的示例性设计。也可以使用能支持短和长OFDM码元两者的其它设计。例如,可以使用一交织器来保存要被交织的全部编码比特。多路复用器426或多路分解器422于是会把编码比特从该交织器映射到适当的子带。
表3所示的频率交织方案把具有偶数索引的编码比特(在截短后)分配给具有负索引的子带,把具有奇数索引的编码比特分配给具有正索引的子带。对于编码速率1/2,来自第一生成器133的编码比特在具有负索引的子带上被发送,来自第二生成器171的编码比特在具有正索引的子带上被发送。编码比特也可以被搅乱,使得来自各个生成器的编码比特在所有数据子带间扩展。
交织可以各种方式执行。例如,在数据子带间的交织后,各个子带的编码比特进一步在多个OFDM码元周期上交织以实现时间分集。
对于短和长的OFDM码元两者来说,交织器220为各个OFDM码元提供经交织的编码比特序列。序列包含各个数据子带的B个经交织的编码比特。然后,码元映射单元222基于所选速率所确定的调制方案把经交织的编码比特映射为数据码元,如表1所示。
表4示出系统所支持的六个调制方案的码元映射。对于每个调制方案(除了BPSK),B/2个编码比特被映射到同相(I)分量,其它B/2个编码比特被映射到正交(Q)分量。在一实施例中,各个调制方案的信号群基于格雷(Gray)映射而定义。根据格雷映射,信号群中的相邻点(I和Q分量中)仅相差一个比特位置。格雷映射为较为可能的误差事件减少了比特误差数,所述误差事件对应于一接收码元被映射为正确位置附近的一个位置,该情况下仅错误检测到一个编码比特。
表4
BPSK | ||
b0 | I | Q |
0 | -1 | 0 |
1 | 1 | 0 |
QPSK | |||
b0 | I | b1 | Q |
0 | -1 | 0 | -1 |
256QAM | |||
b0b1b2b3 | I | b4b5b6b7 | Q |
0000 | -15 | 0000 | -15 |
0001 | -13 | 0001 | -13 |
0011 | -11 | 0011 | -11 |
0010 | -9 | 0010 | -9 |
0110 | -7 | 0110 | -7 |
0111 | -5 | 0111 | -5 |
1 | 1 | 1 | 1 |
16QAM | |||
b0b1 | I | b2b3 | Q |
00 | -3 | 00 | -3 |
01 | -1 | 01 | -1 |
11 | 1 | 11 | 1 |
10 | 3 | 10 | 3 |
64QAM | |||
b0b1b2 | I | b3b4b5 | Q |
000 | -7 | 000 | -7 |
001 | -5 | 001 | -5 |
011 | -3 | 011 | -3 |
010 | -1 | 010 | -1 |
110 | 1 | 110 | 1 |
111 | 3 | 111 | 3 |
101 | 5 | 101 | 5 |
100 | 7 | 100 | 7 |
0101 | -3 | 0101 | -3 |
0100 | -1 | 0100 | -1 |
1100 | 1 | 1100 | 1 |
1101 | 3 | 1101 | 3 |
1111 | 5 | 1111 | 5 |
1110 | 7 | 1110 | 7 |
1010 | 9 | 1010 | 9 |
1011 | 11 | 1011 | 11 |
1001 | 13 | 1001 | 13 |
1000 | 15 | 1000 | 15 |
对于表4所示的四个QAM调制方案的每一个,每个分量最左边的比特最不可能被错误接收,每个分量最右边的比特最可能被错误接收。为了为每个比特位置实现相等的差错概率,组成各个QAM码元的B个比特会被搅乱。这实际上会实现QAM码元的维数间的交织,使得形成QAM码元的编码比特被映射到QAM码元的不同比特位置。
表4所示各个调制方案的I和Q值用一标准化因子Kmod缩放,使相关信号群中所有信号点的平均功率都相等。表4示出各个调制方案的标准化因子。也可以使用标准化因子的量化值。于是,各个数据子带的数据码元s(k)会有以下形式:
s(k)=(I+jQ)·Kmod (2)
其中对于短OFDM码元,k∈KS,对于长OFDM码元,k∈KL;
I和Q是对于所选调制方案在表4中的值;以及
Kmod取决于所选的调制方案。
系统100执行空间处理以实现两个维数间的发送分集。在一实施例中,系统100实现了(1)根据每子带和每OFDM码元对的空时发送分集(STTD)以便为短OFDM码元实现空间和时间分集,以及(2)根据每子带对和每OFDM码元的空频发送分集(SFTD)以便为长OFDM码元实现空间和频率分集。
短OFDM码元的一示例性STTD方案如下运作。假定在一给定的子带上要发送两个数据码元,标记为s1和s2。接入点生成两个向量x1=[s1 s2]T和 其中“*”表示复共轭,“T”表示转置。每个向量包括要在一个OFDM码元周期内从两根天线发出的两个发送码元(例如向量
x 1在第一个OFDM码元周期内从两根天线发出,向量
x 2在下一个OFDM码元周期内从两根天线发出)。因此,每个数据码元在两个OFDM码元周期上发送(例如发送码元s1在第一OFDM码元周期中从一根天线发出,发送码元-s1 *在下一个OFDM码元周期中从另一根天线发出)。
如果用户终端带有单根天线,则接收码元可以表示为:
r1=h1s1+h2s2+n1, (3)
其中r1和r2是两个连续OFDM码元周期的两个接收码元;
h1和h2是对于所考虑的子带从两根发送天线到接收天线的路径增益;以及
n1和n2分别是两个接收码元r1和r2的噪声。
用户终端可以如下导出两个数据码元s1和s2的估计:
或者,接入点可以生成两个向量
和
并且在两个OFDM码元周期内顺序地发送这两个向量。用户终端可以导出两个数据码元的估计
和
其中α=|h1|2+|h2|2。
上述描述可以扩展到具有两根或多根发送天线、多根接收天线以及多个子带的系统。为各个数据子带使用两根发送天线。假定在一给定的子带k上要发送两个数据码元,标记为s1(k)和s2(k)。接入点生成两个向量
x 1(k)=[s1(k) s2(k)]T和 或者等价地生成两个码元集
和 每个码元集包括从子带k上的相应天线要在两个OFDM码元周期内顺序发出的两个发送码元(即码元集{xi(k)}在两个OFDM码元周期内在子带k上从天线i发出,码元集{xj(k)}在相同的两个OFDM码元周期内在子带k上从天线j发出)。
如果用户终端带有多根天线,则接收码元可以表示为:
r 1(k)=
h i(k)s1(k)+
h j(k)s2(k)+
n 1(k), (5)
其中
r 1(k)和
r 2(k)是在用户终端处在子带k上的两个连续OFDM码元周期内接收到的两个码元向量,每个向量都包括NR根接收天线的NR个接收码元;
h i(k)和
h j(k)分别是子带k的发送天线i和j的路径增益向量,每个向量都包括从相关的发送天线到NR根接收天线的每一根的信道增益;以及
n 1(k)和
n 2(k)分别是两个接收码元向量
r 1(k)和
r 2(k)的噪声向量。
用户终端可以如下导出两个数据码元s1(k)和s2(k)的估计:
或者,接入点可以生成两个码元集xi(k)={s1(k) s2(k)}和
并且从天线i和j发出这些码元集。用户终端可以导出两个数据码元的估计: 和
其中
STTD方案为每个数据子带使用了一对发送天线。如果接入点带有两根发送天线,则两根天线都用于短OFDM码元的全部48个数据子带。如果接入点带有四根发送天线,则每根天线用于48个数据子带的一半。表5列出短OFDM码元的STTD方案的示例性子带-天线分配方案。
表5
子带索引kS | 发送天线索引 | 子带索引kS | 发送天线索引 | 子带索引kS | 发送天线索引 | 子带索引kS | 发送天线索引 |
- | - | -13 | 1,2 | 1 | 3.4 | 15 | 1,2 |
-26 | 1,2 | -12 | 3,4 | 2 | 1,2 | 16 | 2,4 |
-25 | 3,4 | -11 | 1,3 | 3 | 2,4 | 17 | 1,3 |
-24 | 1,3 | -10 | 2,4 | 4 | 1,3 | 18 | 2,3 |
-23 | 2,4 | -9 | 1,4 | 5 | 2,3 | 19 | 1,4 |
-22 | 1,4 | -8 | 2,3 | 6 | 1,4 | 20 | 3,4 |
-21 | - | -7 | - | 7 | - | 21 | - |
-20 | 2,3 | -6 | 1,2 | 8 | 3,4 | 22 | 1,2 |
-19 | 1,2 | -5 | 3,4 | 9 | 1,2 | 23 | 2,4 |
-18 | 3,4 | -4 | 1,3 | 10 | 2,4 | 24 | 1,3 |
-17 | 1,3 | -3 | 2,4 | 11 | 1,3 | 25 | 2,3 |
-16 | 2,4 | -2 | 1,4 | 12 | 2,3 | 26 | 1,4 |
-15 | 1,4 | -1 | 2,3 | 13 | 1,4 | - | - |
-14 | 2,3 | 0 | - | 14 | 3,4 | - | - |
图5说明了表5所示的子带-天线分配方案。对于该方案,发送天线1和2用于索引为{-26,-19,-13,-6,2,9,15,22}的子带,发送天线3和4用于索引为{-25,-18,-12,-5,1,8.14,20}的子带,依此类推。四根发送天线有六个不同的天线对。六个天线对的每一个都用于8个数据子带,数据子带在48个数据子带间基本均匀地间隔。天线对到子带的分配使得为相邻子带使用不同的天线,这会提供更高的频率和空间分集。例如,天线1和2用于子带-26,天线3和4用于子带-25。
表5中的天线-子带分配也使全部四根发送天线都用于最低编码速率1/4的每个编码比特,这使空间分集最大化。对于编码速率1/4,每个编码比特被重复并且在两个子带上被发送,它们被映射到两个不相连的天线对,使得全部四根天线都用来发送该编码比特。例如,表3中的比特索引0和1对应于同一重复的编码比特,索引为0的编码比特在子带-26上从天线1和2发出,索引为1的编码比特在子带1上从天线3和4发出。
长OFDM码元的持续期约为短OFDM码元持续期的四倍。为了使处理延迟和缓冲要求最小,使用空频发送分集在两个子带上从两根天线同时发出两个长OFDM码元。
长OFDM码元的一个示例性SFTD方案如下运作。假定生成两个数据码元,标记为s(k1)和s(k1+1),并且将其映射到长OFDM码元的两个相邻子带。接入点在子带k1上从两根天线发出码元s(k1)和s(k1+1),并且在子带k1+1上从相同的两根天线发出码元s*(k1+1)和-s*(k1)。因为假定信道响应在两个子带上近似恒定,所以为数据码元对使用了相邻的子带。
如果接入点带有两根发送天线,则两根天线都用于长OFDM码元的全部192个数据子带。如果接入点带有四根发送天线,则也可以为长OFDM码元使用表5所示的相同的子带一天线分配方案。该情况下,首先把长OFDM码元的索引为k1的子带映射到短OFDM码元的索引为kS的相应子带,如下:
kos是长OFDM子带索引k1的子带索引偏移(kos∈{0,1,2,3})。与所映射的短OFDM码元子带索引kS相对应的天线对从表5中确定,并且用于索引为k1的长OFDM码元子带。
对于SFTD方案,用户终端处为获得两个数据码元的估计的处理可以如公式(4)和(6)所示执行。然而,所述计算对于在两个子带上而不是在两个OFDM码元周期上获得的接收码元进行。
图6示出发送空间处理器122a的框图,处理器122a实现了短OFDM码元的STTD方案。发送空间处理器122a是图1中的发送空间处理器122的一个实施例。
在发送空间处理器122a内,多路分解器612从发送数据处理器120接收一数据码元流{s(k)},对于短OFDM码元的48个数据子带把该码元流多路分解成48个数据码元子流,并且把每个子流提供给相应的空时编码器620。每个子流包括每个短OFDM码元周期的一个数据码元,所述码元周期对应于码元速率TS -1,TS是一个短OFDM码元的持续期。
在每个空时编码器620内,多路分解器622把数据码元子流多路分解成两个码元序列,每个序列的码元速率为(2TS)-1。第一个码元序列被提供给开关628a和单元624b的“0”输入端,单元624b对序列中的每个码元进行反转和共轭。第二个码元序列被提供给开关628b和单元624a的“0”输入端,单元624a对序列中的每个码元进行共轭。延迟单元626a把来自单元624a的码元延迟一个短OFDM码元周期,并把经延迟的码元提供个开关628a的“1”输入端。延迟单元626b把来自单元624b的码元延迟一个短OFDM码元周期,并把经延迟的码元提供个开关628b的“1”输入端。开关628a以短OFDM码元速率开关,并且在两个OFDM码元周期的每一个中为一根发送天线提供码元集
类似地,开关628b以短OFDM码元速率开关,并且在两个OFDM码元周期的每一个中为另一根发送天线提供码元集
缓冲器/多路复用器630a到630d对来自空时编码器620的发送码元进行缓冲和多路复用。每个缓冲器/多路复用器630从适当的空时编码器620接收导频码元和发送码元,如表5所确定的。特别是,缓冲器/多路复用器630a接收映射到天线1的所有子带(例如子带-26、-24、-22、-19等等)的发送码元,缓冲器/多路复用器630b接收映射到天线2的所有子带(例如子带-26、-23、-20、-19等等)的发送码元,缓冲器/多路复用器630c接收映射到天线3的所有子带(例如子带-25、-24、-20、-18等等)的发送码元,而缓冲器/多路复用器630d接收映射到天线4的所有子带(例如子带-25、-23、-22、-18等等)的发送码元。
于是,对于每个短OFDM码元周期,每个缓冲器/多路复用器630多路复用了四个导频子带的四个导频码元、24个数据子带的24个发送码元、以及36个未使用子带的36个零值信号(或“零值”码元),以便为总共64个子带形成一64个发送码元的序列。尽管对于短OFDM码元有48个数据子带,然而对于STTD方案为每根发送天线仅使用了24个子带,因为对于每个子带仅使用了两根天线,因此,每根天线的实际未使用子带数目为36而不是12。序列中的每个发送码元都可以是来自编码器620的发送码元、导频码元或零值码元,并且在一个短OFDM码元周期内在一个子带上被发送。每个缓冲器/多路复用器630为一根发送天线提供一发送码元流{xi(k)}。每个发送码元流包含64个发送码元的级联序列,对于每个OFDM码元周期有一个序列。
图7示出发送空间处理器122b的框图,处理器122b实现了长OFDM码元的SFTD方案。发送空间处理器122b是图1中的发送空间处理器122的另一实施例。
在发送空间处理器122b内,多路分解器712从发送数据处理器120接收一数据码元流{s(k)},对于长OFDM码元的192个数据子带把该流多路分解成192个数据码元子流,并且把每一对子流提供给相应的空频编码器720。每个子流包括各个长OFDM码元周期的一个数据码元,每个长OFDM码元周期对应于码元速率TL -1,其中TL是一个长OFDM码元的持续期。
每个空频编码器720接收对于两个子带kl和kl+1的一对数据码元子流。在每个编码器720内,单元724a对子带kl+1的子流中的每个码元取共轭,单元724b对子带kl的子流中的每个码元反转和取共轭。各个编码器720:(1)把两个数据码元子流提供给两个缓冲器/多路复用器730用于从两根相关的天线在子带kl上发送,(2)把两个子流从单元724a和724b提供给相同的两根天线用于在子带kl+1上发送。进入和离开各个空频编码器720的所有子流的码元速率为TL -1。
各个缓冲器/多路复用器730接收导频码元并且从适当的空频编码器720发送码元,编码器如公式(7)和表5所确定。特别是,缓冲器/多路复用器730a、730b、730c和730d分别接收被映射到天线1、2、3和4的所有子带的发送码元。然后,各个缓冲器/多路复用器730为每个长OFDM码元周期多路复用16个导频子带的16个导频码元、192个数据子带的192个发送码元以及48个未使用子带的48个零值码元,以便为总共256个子带形成一256个发送码元的序列。对于SFTD方案,所有192个数据子带都用于数据传输。每个缓冲器/多路复用器730为一根发送天线提供一个发送码元流{xi(k)}。
图8示出调制器126x一实施例的框图,调制器126x可用于图1中的各个调制器126a到126d。调制器126x包括与发射机单元(TMTR)820耦合的OFDM调制器810。OFDM调制器810包括一可变尺寸的快速傅立叶逆变换(IFFT)单元812和一循环前缀生成器814。IFFT单元812接收一发送码元流{xi(k)},对流{xi(k)}中的每个L个发送码元的序列执行L点IFFT,并且为经变换的码元提供一个L个时域码片的相应序列。OFDM码元尺寸L由控制器130所提供的控制信号表示,对于短OFDM码元L=64,对于长OFDM码元L=256。循环前缀生成器814对来自IFFT单元812的每个经变换码元的一部分进行重复,以形成相应的OFDM码元。一OFDM码元周期对应于一个OFDM码元的持续期。循环前缀生成器814的输出是一OFDM码元流,其尺寸由控制信号确定。发射机单元820把OFDM码元流转换成一个或多个模拟信号,并且进一步调节(例如放大、滤波和上变频)所述模拟信号以便生成使用于从相关天线128x发出的下行链路信号。
图9示出具有多根(NR>1)天线的用户终端150y的框图。来自接入点110的下行链路信号被每一根天线152a到152r所接收。每根天线向一相应的解调器154提供一接收信号。
在各个解调器154内,接收机单元(RCVR)912对其接收信号进行调节(例如下变频、放大和滤波)和数字化,并且把一采样流提供给OFDM解调器。OFDM解调器包括一循环前缀删除单元914和一可变尺寸的快速傅立叶变换(FFT)单元916。单元914删除各个OFDM码元中的循环寻呼前缀,并且提供包含L个采样的一相应的接收的经变换码元,其中L取决于OFDM码元尺寸。可变尺寸FFT单元916接收来自单元914的采样流,对于接收到的经变换码元的流中每个L个采样的序列执行L点FFT,并且为该经变换码元提供一相应的L个接收码元的序列。解调器154a到154r把NR个接收码元流(对于数据)提供给接收空间处理器160y,并且把接收到的导频码元提供给信道估计器960。
接收空间处理器160y用来自信道估计器960的信道增益估计对NR个接收码元流执行空间处理,例如公式(6)所示。接收空间处理器160y向接收数据处理器170y提供一经恢复的数据码元流{(k)},{(k)}是接入点110所发送的数据码元流{s(k)}的估计。
在接收数据处理器170y内,码元解映射单元972按照数据流所使用的调制方案对经恢复的数据码元进行解调,如控制器180y所提供的解调控制所表示。然后,信道解交织器974以与接入点110处执行的交织相反的方式对经解调的数据进行解交织,如控制器180y所提供的解交织控制所表示。对于短OFDM码元,为每个短OFDM码元在48个数据子带上执行解交织,与上述交织相反。对于长OFDM码元,同样如上所述,在四块48个数据子带的每一块上执行解交织。然后,解码器976以与接入点110处执行的编码相反的方式对经解交织的数据进行解码,如控制器180y所提供的解码控制所表示。对于上述卷积编码方案,可以为解码器976使用维特比解码器。解扰器978以与接入点110处执行的扰乱相反的方式对经解码的数据进行解扰。尽管在图9中未示出,CRC校验器可以基于每个分组中包括的CRC值来校验各个分组,以确定分组是被正确接收还是被错误接收。分组状态可用来开始用户终端150y错误接收到的分组的重发。
信道估计器960基于接收到的导频码元来估计各个信道特征(例如路径增益和噪声方差)。信道估计器960为每根接入点天线把一路径增益估计的向量
提供给接收空间处理器160y,接收空间处理器160y使用这些路径增益估计来恢复所发送的数据码元,如公式(6)所示。信道估计器960也把信道估计提供给控制器180y。控制器180y可以执行与用户终端150y处的发送分集处理有关的各个功能。控制器180y也可以基于信道估计和/或其它考虑因素来选择数据传输所使用的恰当速率和OFDM码元尺寸。
对于带有单根天线152x的用户终端,解调器154x提供一个接收码元流。接收空间处理器160x用信道增益估计(如公式(4)所示)对接收码元流执行空间处理,并且提供一经恢复的数据码元流{(k)}。然后,接收数据处理器170x以上述用户终端150y所用的方式对经恢复的数据码元流进行码元解映射、解交织、解码和解扰。
为了清楚,上面已经为示例性的多天线OFDM系统中的下行链路描述了发送分集处理技术。这些技术也可以由带有多根天线的用户终端用于上行链路。同样为了清楚,已经为OFDM系统描述了这些技术。OFDM系统可以支持一个OFDM码元尺寸、两个OFDM码元尺寸(如上所述)或者多于两个OFDM码元尺寸。这些技术中的许多技术也可以用于单载波多天线系统。
图10示出用于在多天线OFDM系统中的发射机处执行发送分集处理的过程1000的流程图。发射机按照一编码方案对话务数据进行编码以得出经编码的数据(方框1012)。编码方案可以包括一固定速率的基码以及对于系统所支持的一组编码速率的一组重复和/或截短模式。然后,发射机按照一交织方案对经编码的数据进行交织以得出经交织的数据(方框1014)。发射机接着按照一调制方案来映射经交织的数据,以得出一数据码元流(方框1016)。然后,发射机处理每一对数据码元以得出两对发送码元,用于从一对发送天线发出(方框1018)。每个发送码元都是数据码元的一种形式。两对发送码元可以或者在两个OFDM码元周期内或者在两个子带上从每对天线发出。如果NT根发送天线可用于数据传输,则可以使用NT·(NT-1)/2个不同的天线对来发送数据码元。如果系统支持多个OFDM码元尺寸,则发射机按照所选的OFDM码元尺寸对每根发送天线的发送码元流进行变换(例如对其执行OFDM调制),以便为该发送天线得出一相应的OFDM码元流(方框1020)。
图11示出用于在多天线OFDM系统的接收机处用发送分集执行数据接收的过程1100的流程图。接收机按照所选的OFDM码元尺寸对NR根接收天线的每一根的采样流进行变换,以得出该接收天线的一相应的接收码元流,其中NR≥1(方框1112)。接收机得出一接收码元向量流,其中每个向量包括NR根天线的NR个接收码元,并且是对应于一个OFDM码元周期内的一个子带(方框1114)。接收机用信道估计处理每一对接收码元向量以得出两个经恢复的数据码元,如公式(4)或(6)所示(方框1116)。两个向量对应于STTD方案的两个OFDM码元周期以及SFTD方案的两个子带。为接收码元向量流得出一经恢复的数据码元流。然后,接收机按照一解调方案对经恢复的数据码元流进行解映射以得出经解调的数据(方框1118),按照一解交织方案来解交织经解调的数据以得出经解交织的数据(方框1120),并且按照一解码方案来解码经解交织的数据以得出经解码的数据(方框1122)。解调、解交织和解码方案分别与发射机处使用的调制、交织和编码方案相反。
这里所述的发送分集处理技术可以通过各种手段来实现。例如,这些技术可以用硬件、软件或者它们的组合来实现。对于硬件实现而言,用于在各个接入点和用户终端处执行发送分集处理的处理单元可以在以下元器件内实现:一个或多个专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、场可编程门阵列(FPGA)、处理器、控制器、微控制器、微处理器、被设计成执行这里所述功能的其它电子单元、或者它们的组合。
对于软件实现而言,发送分集处理技术可以用执行这里所述功能的模块(例如过程、功能等等)来实现。软件代码可以被保存在存储器单元(例如图1中的存储器单元132、182x或182y)中,并且由处理器(例如控制器130、180x或180y)执行。存储器单元可以在处理器内或处理器外实现,后一情况下它可以通过本领域公知的各种手段与处理器通信上耦合。
上述优选实施例的描述使本领域的技术人员能制造或使用本发明。这些实施例的各种修改对于本领域的技术人员来说是显而易见的,这里定义的一般原理可以被应用于其它实施例中而不背离本发明的精神或范围。因此,本发明并不限于这里示出的实施例,而要符合与这里揭示的原理和新颖特征一致的最宽泛的范围。
Claims (52)
1.一种处理数据用于在无线多天线正交频分复用(OFDM)通信系统中传输的方法,所述方法包括:
按照一编码方案对话务数据进行编码以得出经编码的数据;
按照一交织方案对经编码的数据进行交织以得出经交织的数据;
按照一调制方案对经交织的数据进行码元映射以得出一数据码元流;以及
处理所述流中的每一对数据码元以得出用于从一对天线发出的两对发送码元,其中每个发送码元是数据码元的一种形式。
2.如权利要求1所述的方法,其特征在于,每对数据码元的两对发送码元在两个OFDM码元周期内在同一子带上从一对天线发出。
3.如权利要求1所述的方法,其特征在于,每对数据码元的两对发送码元在一个OFDM码元周期内在两个子带上从一对天线发出。
4.如权利要求1所述的方法,其特征在于,N根天线可用于数据传输,并且使用NT·(NT-1)/2个不同的天线对在所述流中发送数据码元对,其中N>2。
5.如权利要求1所述的方法,其特征在于,多个子带用于数据传输,并且为数据传输使用的相邻子带使用不同的天线对。
6.如权利要求1所述的方法,其特征在于,所述系统支持具有S个子带的第一OFDM码元尺寸以及具有L个子带的第二OFDM码元尺寸,其中S是大于一的整数,L是S的整数倍数。
7.如权利要求6所述的方法,其特征在于还包括:
为多根天线形成多个发送码元流;以及
按照第一或第二OFDM码元尺寸来变换每个发送码元流以得出一相应的OFDM码元流。
8.如权利要求1所述的方法,其特征在于,所述编码包括:
按照一基码对话务数据进行编码以便以固定的编码速率得出编码比特,以及
以固定的编码速率截短编码比特以得出经编码的数据,所述经编码的数据由处在系统所支持的多个编码速率之一下的编码比特组成。
9.如权利要求8所述的方法,其特征在于,所述基码是速率为1/2的卷积编码。
10.如权利要求8所述的方法,其特征在于,所述多个编码速率与多个截短模式相关联。
11.如权利要求1所述的方法,其特征在于,所述编码包括:
按照一基码对话务数据进行编码以便以固定的编码速率得出编码比特,以及
以固定的编码速率重复编码比特以便得出经编码的数据,所述经编码的数据由低于固定编码速率的较低编码速率下的编码比特组成。
12.如权利要求1所述的方法,其特征在于,所述交织包括:
从经编码的数据形成编码比特序列,以及
对于每个序列,基于交织方案把序列中的每个编码比特映射到多个子带之。
13.如权利要求12所述的方法,其特征在于,每个编码比特序列都是为了一个OFDM码元周期内多个子带上的传输而指定的。
14.如权利要求1所述的方法,其特征在于,所述交织包括:
从经编码的数据形成编码比特序列,
把每个序列分成M个编码比特块,用于在M组不相连的子带上发送,对于每组子带有一个编码比特块,其中M≥2,以及
对于每个序列的M块的每一个,基于交织方案把块中的每个编码比特映射到该块的组中的一个子带。
15.如权利要求1所述的方法,其特征在于,所述码元映射包括:
对经交织的数据内的B比特的集合成组,以形成B比特的二进制值,其中B≥1,以及
基于调制方案把每一个B比特的二进制值映射到一数据码元,其中所述调制方案用格雷映射来定义,使得该调制方案的信号群中两个相邻的数据码元在B个比特中最多相差一比特。
16.如权利要求15所述的方法,其特征在于,所述码元映射还包括:
对于每个集合重排B个比特,其中经重排的B比特的集合用来形成B比特的二进制值。
17.无线多天线正交频分复用(OFDM)通信系统中的一种发射机,包括:
编码器,用于按照一编码方案对话务数据进行编码以得出经编码的数据;
交织器,用于按照一交织方案对经编码的数据进行交织以得出经交织的数据;
码元映射单元,用于按照一调制方案对经交织的数据进行码元映射以得出一数据码元流;以及
发送空间处理器,用于处理所述流中的每一对数据码元以得出用于从一对天线发出的两对发送码元,其中每个发送码元都是数据码元的一种形式。
18.如权利要求17所述的发射机,其特征在于,所述发送空间处理器用于实现空时发送分集,并且在两个OFDM码元周期内为每一对数据码元提供两对发送码元。
19.如权利要求17所述的发射机,其特征在于,所述发送空间处理器用于实现空频发送分集,并且在两个子带上为每一对数据码元提供两对发送码元。
20.如权利要求17所述的发射机,其特征在于,所述系统支持具有S个子带的第一OFDM码元尺寸以及具有L个子带的第二OFDM码元尺寸,其中S是大于一的整数,L是S的整数倍数。
21.如权利要求20所述的发射机,其特征在于还包括:
多根天线的多个调制器,每个调制器都用于为相关的天线变换一发送码元流以便为该天线得出一相应的OFDM码元流。
22.无线多天线正交频分复用(OFDM)通信系统中的一种装置,包括:
按照一编码方案对话务数据进行编码以得出经编码的数据的装置;
按照一交织方案对经编码的数据进行交织以得出经交织的数据的装置;
按照一调制方案对经交织的数据进行码元映射以得出一数据码元流的装置;以及
处理所述流中的每一对数据码元以得出用于从一对天线发出的两对发送码元的装置,其中每个发送码元都是数据码元的一种形式。
23.如权利要求22所述的装置,其特征在于,每一对数据码元的两对发送码元在两个OFDM码元周期内从一对天线发出。
24.如权利要求22所述的装置,其特征在于,每一对数据码元的两对发送码元在两个子带上从一对天线发出。
25.如权利要求22所述的装置,其特征在于,所述系统支持具有S个子带的第一OFDM码元尺寸以及具有L个子带的第二OFDM码元尺寸,其中S是大于一的整数,L是S的整数倍数。
26.如权利要求25所述的装置,其特征在于还包括:
为多根天线形成多个发送码元流的装置;以及
按照第一或第二OFDM码元尺寸来变换每个发送码元流以得出一相应的OFDM码元流的装置。
27.一种处理数据用于在无线多天线通信系统中传输的方法,所述方法包括:
按照一编码方案对话务数据进行编码以得出经编码的数据;
按照一交织方案对经编码的数据进行交织以得出经交织的数据;
按照一调制方案对经交织的数据进行码元映射以得出一数据码元流;以及
对数据码元流进行多路分解,使得所述流中的每一对数据码元都从一对天线发出,而所述流中的连续数据码元对从不同的天线对发出。
28.如权利要求27所述的方法,其特征在于,所述多路分解还使经编码数据中的每个编码比特都基于编码比特的编码速率从该编码比特可用的最大数目的天线发出。
29.如权利要求27所述的方法,其特征在于,所述MIMO系统实现了正交频分复用。
30.如权利要求29所述的方法,其特征在于,所述流中的每一对数据码元在一个子带上从一对天线发出,其中相邻子带的数据码元对在不同的天线对上发出。
31.如权利要求29所述的方法,其特征在于,经编码数据的每组S个编码比特被交织,其中S是数据传输所使用的子带数目。
32.一种处理数据用于在无线多天线正交频分复用(OFDM)通信系统中传输的方法,所述方法包括:
按照一编码方案对话务数据进行编码以得出经编码的数据;
按照一交织方案对经编码的数据进行交织以得出经交织的数据;
按照一调制方案对经交织的数据进行码元映射以得出一数据码元流;以及
对数据码元流进行多路分解,使得所述流中的每一对数据码元都在两个子带上从一对天线发出。
33.如权利要求32所述的方法,其特征在于,所述流中的每一对数据码元在数据传输所用的两个相邻子带上发出。
34.如权利要求32所述的方法,其特征在于还包括:
处理所述流中的每一对数据码元以得出第一和第二发送码元对,每个发送码元都是数据码元对中一个数据码元的一种形式,其中第一发送码元对在第一子带上从天线对发出,第二发送码元对在第二子带上从天线对发出。
35.如权利要求34所述的方法,其特征在于,所述第一和第二发送码元对分别在第一和第二子带上在一个OFDM码元周期内并行地发出。
36.一种在无线多天线正交频分复用(OFDM)通信系统中的接收机处处理数据的方法,所述方法包括:
获得一接收码元向量流,每个向量都包括N根接收天线的N个接收码元,其中N是一或大于一;
处理所述流中的每一对接收码元向量以得出两个经恢复的数据码元,它们是作为两个发送码元对从两根发送天线发出的两个数据码元的估计,每个发送码元都是数据码元的一种形式,其中为接收码元向量流获得一经恢复的数据码元流;
按照一解调方案对经恢复的数据码元流进行码元解映射以得出经解调的数据;
按照一解交织方案对经解调的数据进行解交织以得出经解交织的数据;以及
按照一解码方案对经解交织的数据进行解码以得出经解码的数据。
37.如权利要求36所述的方法,其特征在于,每一对接收码元向量对应于两个OFDM码元周期。
38.如权利要求36所述的方法,其特征在于,每一对接收码元向量对应于两个子带。
39.如权利要求36所述的方法,其特征在于,所述系统支持具有S个子带的第一OFDM码元尺寸以及具有L个子带的第二OFDM码元尺寸,其中S是大于一的整数,L是S的整数倍数。
40.如权利要求39所述的方法,其特征在于还包括:
按照第一和第二OFDM码元尺寸为N根接收天线的每一根变换一采样流,以便为该接收天线得出一相应的接收码元流,其中所述接收码元向量流是从N根接收天线的N个接收码元流获得的。
41.如权利要求36所述的方法,其特征在于,N=1,每个向量包括一根接收天线的一个接收码元。
42.如权利要求36所述的方法,其特征在于,N>1,每个向量包括多根接收天线的多个接收码元。
43.无线多天线正交频分复用(OFDM)通信系统中的一种接收机,包括:
接收空间处理器,用于接收一接收码元向量流,并且处理所述流中的每一对接收码元向量以得出两个经恢复的数据码元,经恢复的数据码元是作为两个发送码元对从两根发送天线发出的两个数据码元的估计,每个发送码元都是数据码元的一种形式,其中每个向量包括N根接收天线的N个接收码元,N是一或大于一,经恢复的数据码元流是从接收码元向量流获得的;
码元解映射单元,用于按照一解调方案对经恢复的数据码元流进行码元解映射以得出经解调的数据;
解交织器,用于按照一解交织方案对经解调的数据进行解交织以得出经解交织的数据;以及
解码器,用于按照一解码方案对经解交织的数据进行解码以得出经解码的数据。
44.如权利要求43所述的接收机,其特征在于,每一对接收码元向量对应于两个OFDM码元周期。
45.如权利要求43所述的接收机,其特征在于,每一对接收码元向量对应于两个子带。
46.如权利要求43所述的接收机,其特征在于,所述系统支持具有S个子带的第一OFDM码元尺寸以及具有L个子带的第二OFDM码元尺寸,其中S是大于一的整数,L是S的整数倍数。
47.如权利要求46所述的接收机,其特征在于还包括:
N根接收天线的N个解调器,每个解调器用于按照第一或第二OFDM码元尺寸为相关的接收天线变换一采样流,以便为该接收天线得出一相应的接收码元流,其中所述接收码元向量流是从N根接收天线的N个接收码元流获得的。
48.无线多天线正交频分复用(OFDM)通信系统中的一种装置,包括:
用于获得一接收码元向量流的装置,每个向量都包括N根接收天线的N个接收码元,N是一或大于一;
处理所述流中的每一对接收码元向量以得出两个经恢复的数据码元的装置,所述经恢复的数据码元是作为两个发送码元对从两根发送天线发出的两个数据码元的估计,每个发送码元都是数据码元的一种形式,其中为接收码元向量流获得一经恢复的数据码元流;
按照一解调方案对经恢复的数据码元流进行码元解映射以得出经解调的数据的装置;
按照一解交织方案对经解调的数据进行解交织以得出经解交织的数据的装置;以及
按照一解码方案对经解交织的数据进行解码以得出经解码的数据的装置。
49.如权利要求48所述的装置,其特征在于,每一对接收码元向量对应于两个OFDM码元周期。
50.如权利要求48所述的装置,其特征在于,每一对接收码元向量对应于两个子带。
51.如权利要求48所述的装置,其特征在于,所述系统支持具有S个子带的第一OFDM码元尺寸以及具有L个子带的第二OFDM码元尺寸,其中S是大于一的整数,L是S的整数倍数。
52.如权利要求51所述的装置,其特征在于还包括:
按照第一或第二OFDM码元尺寸为N根接收天线的每一根变换一采样流以便为该接收天线得出一相应的接收码元流的装置,其中所述接收码元向量流是从N根接收天线的N个接收码元流获得的。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42130902P | 2002-10-25 | 2002-10-25 | |
US60/421,309 | 2002-10-25 | ||
US10/674,038 US7002900B2 (en) | 2002-10-25 | 2003-09-29 | Transmit diversity processing for a multi-antenna communication system |
US10/674,038 | 2003-09-29 | ||
PCT/US2003/033905 WO2004038987A2 (en) | 2002-10-25 | 2003-10-27 | Transmit diversity processing for a multi-antenna communication system |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1717889A true CN1717889A (zh) | 2006-01-04 |
CN1717889B CN1717889B (zh) | 2011-05-25 |
Family
ID=32110318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2003801045546A Expired - Lifetime CN1717889B (zh) | 2002-10-25 | 2003-10-27 | 多天线通信系统的发送分集处理 |
Country Status (14)
Country | Link |
---|---|
US (3) | US7002900B2 (zh) |
EP (1) | EP1556983B1 (zh) |
JP (2) | JP4739952B2 (zh) |
KR (1) | KR101073331B1 (zh) |
CN (1) | CN1717889B (zh) |
AU (2) | AU2003284943C1 (zh) |
BR (1) | BRPI0315520B1 (zh) |
CA (1) | CA2501449C (zh) |
HK (1) | HK1086123A1 (zh) |
IL (1) | IL167572A (zh) |
MX (1) | MXPA05004194A (zh) |
TW (1) | TWI339057B (zh) |
UA (1) | UA83473C2 (zh) |
WO (1) | WO2004038987A2 (zh) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101043297B (zh) * | 2006-03-20 | 2010-08-25 | 华为技术有限公司 | 一种多天线通信中发射信号的方法及系统 |
CN101039162B (zh) * | 2006-03-17 | 2010-10-06 | 华为技术有限公司 | 多输入多输出系统中确定反馈的方法、装置和系统 |
WO2010124414A1 (zh) * | 2009-04-28 | 2010-11-04 | 上海贝尔股份有限公司 | 多天线发射机以及用于多天线发射机中的数据发送方法 |
CN102474381A (zh) * | 2009-08-12 | 2012-05-23 | 株式会社日立制作所 | 无线通信系统、无线通信装置以及无线通信方法 |
CN102857464A (zh) * | 2011-08-17 | 2013-01-02 | 北京泰美世纪科技有限公司 | 数字传输系统中扩展信号带宽的方法和装置 |
CN103560993A (zh) * | 2007-10-30 | 2014-02-05 | 索尼株式会社 | 数据处理设备及方法 |
CN104702376A (zh) * | 2009-07-29 | 2015-06-10 | 马维尔国际贸易有限公司 | 用于wlan发送的方法和装置 |
WO2017080392A1 (zh) * | 2015-11-13 | 2017-05-18 | 华为技术有限公司 | 数据传输方法和装置 |
CN106899393A (zh) * | 2012-05-30 | 2017-06-27 | 想象力科技有限公司 | 噪声方差估计和干扰检测 |
Families Citing this family (235)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7952511B1 (en) | 1999-04-07 | 2011-05-31 | Geer James L | Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns |
US7295509B2 (en) | 2000-09-13 | 2007-11-13 | Qualcomm, Incorporated | Signaling method in an OFDM multiple access system |
US9130810B2 (en) | 2000-09-13 | 2015-09-08 | Qualcomm Incorporated | OFDM communications methods and apparatus |
US7577085B1 (en) | 2002-06-03 | 2009-08-18 | Marvell International Ltd. | Multicarrier transmit diversity |
US7349438B2 (en) * | 2002-09-17 | 2008-03-25 | Lucent Technologies Inc. | Formatter, method of formatting encoded symbols and wireless communication system employing the same |
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8208364B2 (en) * | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US7002900B2 (en) * | 2002-10-25 | 2006-02-21 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US7986742B2 (en) * | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US20040081131A1 (en) | 2002-10-25 | 2004-04-29 | Walton Jay Rod | OFDM communication system with multiple OFDM symbol sizes |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8320301B2 (en) | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US7281189B2 (en) * | 2002-10-31 | 2007-10-09 | Matsushita Electric Indutrial Co., Ltd. | Apparatus and method for separately modulating systematic bits and parity bits in accordance with communication quality |
US7782970B2 (en) * | 2003-02-27 | 2010-08-24 | Intel Corporation | Apparatus and associated methods to introduce diversity in a multicarrier communication channel |
US8289836B2 (en) * | 2003-02-27 | 2012-10-16 | Intel Corporation | Apparatus and associated methods to introduce diversity in a multicarrier communication channel |
US7486735B2 (en) * | 2003-02-28 | 2009-02-03 | Nortel Networks Limited | Sub-carrier allocation for OFDM |
US20040240378A1 (en) * | 2003-03-14 | 2004-12-02 | Kei Ng Benjamin Koon | Method of spread space-spectrum multiple access |
JP4077355B2 (ja) * | 2003-04-16 | 2008-04-16 | 三菱電機株式会社 | 通信装置および通信方法 |
US7835262B2 (en) * | 2003-05-14 | 2010-11-16 | Texas Instruments Incorporated | Multi-band OFDM communications system |
CN1883151B (zh) * | 2003-09-15 | 2010-06-16 | 英特尔公司 | 用于传递多个空间信号流的多载波发射机、多载波接收机和方法 |
US7418042B2 (en) | 2003-09-17 | 2008-08-26 | Atheros Communications, Inc. | Repetition coding for a wireless system |
ES2377648T3 (es) * | 2003-11-07 | 2012-03-29 | Sharp Kabushiki Kaisha | Método para acceso por división de frecuencia y de tiempo |
US8213301B2 (en) * | 2003-11-07 | 2012-07-03 | Sharp Laboratories Of America, Inc. | Systems and methods for network channel characteristic measurement and network management |
KR100520159B1 (ko) * | 2003-11-12 | 2005-10-10 | 삼성전자주식회사 | 다중 안테나를 사용하는 직교주파수분할다중 시스템에서간섭신호 제거 장치 및 방법 |
US7418051B2 (en) * | 2003-11-26 | 2008-08-26 | Lucent Technologies Inc. | Nonsystematic repeat-accumulate codes for encoding and decoding information in a communication system |
US9473269B2 (en) | 2003-12-01 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
US7145940B2 (en) * | 2003-12-05 | 2006-12-05 | Qualcomm Incorporated | Pilot transmission schemes for a multi-antenna system |
US7302009B2 (en) | 2003-12-17 | 2007-11-27 | Qualcomm Incorporated | Broadcast transmission with spatial spreading in a multi-antenna communication system |
US8204149B2 (en) | 2003-12-17 | 2012-06-19 | Qualcomm Incorporated | Spatial spreading in a multi-antenna communication system |
US7570695B2 (en) * | 2003-12-18 | 2009-08-04 | Intel Corporation | Method and adaptive bit interleaver for wideband systems using adaptive bit loading |
KR20050065295A (ko) * | 2003-12-23 | 2005-06-29 | 삼성전자주식회사 | 보조 심볼을 이용한 시공간 블록 부호 인코딩 방법 |
US7573946B2 (en) * | 2003-12-31 | 2009-08-11 | Intel Corporation | Apparatus and associated methods to perform space-frequency interleaving in a multicarrier wireless communication channel |
US7308047B2 (en) * | 2003-12-31 | 2007-12-11 | Intel Corporation | Symbol de-mapping methods in multiple-input multiple-output systems |
US7336746B2 (en) | 2004-12-09 | 2008-02-26 | Qualcomm Incorporated | Data transmission with spatial spreading in a MIMO communication system |
US7995455B1 (en) * | 2004-01-21 | 2011-08-09 | Marvell International Ltd. | Scalable MIMO-OFDM PHY for high throughput WLANs |
US20050204258A1 (en) * | 2004-02-13 | 2005-09-15 | Broadcom Corporation | Encoding system and method for a transmitter in wireless communications |
US8169889B2 (en) | 2004-02-18 | 2012-05-01 | Qualcomm Incorporated | Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system |
JP2007533263A (ja) * | 2004-04-12 | 2007-11-15 | ザ・ディレクティービー・グループ・インコーポレイテッド | 同一チャネル干渉を緩和するためのシフトチャネル特性 |
US8213553B2 (en) * | 2004-04-12 | 2012-07-03 | The Directv Group, Inc. | Method and apparatus for identifying co-channel interference |
US7161988B2 (en) * | 2004-04-12 | 2007-01-09 | The Directv Group, Inc. | Method and apparatus for minimizing co-channel interference |
US7672285B2 (en) * | 2004-06-28 | 2010-03-02 | Dtvg Licensing, Inc. | Method and apparatus for minimizing co-channel interference by scrambling |
AU2005241837B2 (en) * | 2004-05-07 | 2008-04-24 | Huawei Technologies Co., Ltd. | Apparatus and method for encoding/decoding space time block code in a mobile communication system using multiple input multiple output scheme |
US8923785B2 (en) * | 2004-05-07 | 2014-12-30 | Qualcomm Incorporated | Continuous beamforming for a MIMO-OFDM system |
JP4543737B2 (ja) * | 2004-05-10 | 2010-09-15 | ソニー株式会社 | 無線通信システム、無線通信装置及び無線通信方法、並びにコンピュータ・プログラム |
KR101098215B1 (ko) | 2004-05-10 | 2011-12-28 | 소니 주식회사 | 무선 통신 시스템, 무선 통신 장치 및 무선 통신 방법, 및 기록 매체 |
CN1951049A (zh) * | 2004-05-11 | 2007-04-18 | 松下电器产业株式会社 | 无线发送装置、无线接收装置及无线通信系统 |
ATE453156T1 (de) * | 2004-06-10 | 2010-01-15 | Panasonic Corp | System und verfahren für laufzeit-rekonfiguration |
GB2415336B (en) * | 2004-06-18 | 2006-11-08 | Toshiba Res Europ Ltd | Bit interleaver for a mimo system |
KR100671231B1 (ko) * | 2004-06-21 | 2007-02-28 | 삼성전자주식회사 | 최대 다이버시티 최대 부호율을 갖는 짝수개의 송신안테나를 위한 시공간 블록 부호 장치 및 방법 |
CN1998176B (zh) * | 2004-07-01 | 2011-06-15 | 高通股份有限公司 | 高级mimo交织方法和系统 |
US9148256B2 (en) * | 2004-07-21 | 2015-09-29 | Qualcomm Incorporated | Performance based rank prediction for MIMO design |
US9137822B2 (en) | 2004-07-21 | 2015-09-15 | Qualcomm Incorporated | Efficient signaling over access channel |
RU2375822C2 (ru) * | 2004-07-29 | 2009-12-10 | Квэлкомм Инкорпорейтед | Система и способ для разнесения во времени |
US20070081484A1 (en) * | 2004-07-29 | 2007-04-12 | Wang Michael M | Methods and apparatus for transmitting a frame structure in a wireless communication system |
US9246728B2 (en) | 2004-07-29 | 2016-01-26 | Qualcomm Incorporated | System and method for frequency diversity |
US20080317142A1 (en) * | 2005-07-29 | 2008-12-25 | Qualcomm Incorporated | System and method for frequency diversity |
US8391410B2 (en) | 2004-07-29 | 2013-03-05 | Qualcomm Incorporated | Methods and apparatus for configuring a pilot symbol in a wireless communication system |
CA2771267C (en) | 2004-08-12 | 2016-03-15 | Interdigital Technology Corporation | Method and apparatus for implementing space frequency block coding |
US20060218459A1 (en) * | 2004-08-13 | 2006-09-28 | David Hedberg | Coding systems and methods |
US7698623B2 (en) * | 2004-08-13 | 2010-04-13 | David Hedberg | Systems and methods for decreasing latency in a digital transmission system |
US7978778B2 (en) * | 2004-09-03 | 2011-07-12 | Qualcomm, Incorporated | Receiver structures for spatial spreading with space-time or space-frequency transmit diversity |
US7894548B2 (en) | 2004-09-03 | 2011-02-22 | Qualcomm Incorporated | Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system |
CN101019360B (zh) | 2004-09-13 | 2012-06-13 | 松下电器产业株式会社 | 正交频分复用多输入多输出系统的自动重传请求控制系统及方法 |
US8144572B2 (en) * | 2004-09-14 | 2012-03-27 | Qualcomm Incorporated | Detection and mitigation of interference and jammers in an OFDM system |
EP1790100A4 (en) * | 2004-09-18 | 2013-01-02 | Samsung Electronics Co Ltd | METHOD AND DEVICE FOR FREQUENCY SYNCHRONIZATION IN AN OFDM SYSTEM |
CN101015151B (zh) * | 2004-09-22 | 2013-09-25 | 三星电子株式会社 | 多频带正交频分复用发射机和接收机及其信号处理方法 |
US7539270B2 (en) * | 2004-09-30 | 2009-05-26 | Intel Corporation | Method and apparatus to interleave bits across symbols from different constellations |
KR100692594B1 (ko) | 2004-10-13 | 2007-03-13 | 삼성전자주식회사 | 멀티 밴드 직교 주파수 분할 다중 시스템에서 데이터 전송방법 |
US8130855B2 (en) * | 2004-11-12 | 2012-03-06 | Interdigital Technology Corporation | Method and apparatus for combining space-frequency block coding, spatial multiplexing and beamforming in a MIMO-OFDM system |
WO2006057195A1 (ja) | 2004-11-25 | 2006-06-01 | Matsushita Electric Industrial Co., Ltd. | マルチアンテナ送信装置、マルチアンテナ受信装置及びデータ再送方法 |
CN101076965B (zh) * | 2004-12-13 | 2013-04-24 | 皇家飞利浦电子股份有限公司 | 用于mimo传输的数据流的分别交织 |
US20060142051A1 (en) * | 2004-12-28 | 2006-06-29 | Nokia Corporation | Method and apparatus to optimize the utilization of the carriers in a flexible multi-carrier system |
US7551902B2 (en) * | 2004-12-28 | 2009-06-23 | Nokia Corporation | Method and apparatus to increase the diversity order for a multi-carrier FDM system |
US7835264B2 (en) * | 2004-12-29 | 2010-11-16 | Mitsubishi Denki Kabushiki Kaisha | Interleaver, deinterleaver, communication device, and method for interleaving and deinterleaving |
WO2006077729A1 (ja) * | 2005-01-20 | 2006-07-27 | Matsushita Electric Industrial Co., Ltd. | 送信装置、受信装置、および無線通信方法 |
KR20060086673A (ko) * | 2005-01-27 | 2006-08-01 | 학교법인연세대학교 | Dblast시스템의 송신기 및 수신기 |
JP4494238B2 (ja) * | 2005-02-03 | 2010-06-30 | 株式会社エヌ・ティ・ティ・ドコモ | Mimo多重送信装置およびmimo多重送信方法 |
KR100677568B1 (ko) * | 2005-02-07 | 2007-02-02 | 삼성전자주식회사 | 무선랜 상의 데이터 수신에 대한 제어 응답 프레임의 전송속도 결정 방법 |
US7826807B2 (en) * | 2005-03-09 | 2010-11-02 | Qualcomm Incorporated | Methods and apparatus for antenna control in a wireless terminal |
US9246560B2 (en) | 2005-03-10 | 2016-01-26 | Qualcomm Incorporated | Systems and methods for beamforming and rate control in a multi-input multi-output communication systems |
US20060203794A1 (en) * | 2005-03-10 | 2006-09-14 | Qualcomm Incorporated | Systems and methods for beamforming in multi-input multi-output communication systems |
US9154211B2 (en) * | 2005-03-11 | 2015-10-06 | Qualcomm Incorporated | Systems and methods for beamforming feedback in multi antenna communication systems |
US8446892B2 (en) * | 2005-03-16 | 2013-05-21 | Qualcomm Incorporated | Channel structures for a quasi-orthogonal multiple-access communication system |
US9143305B2 (en) | 2005-03-17 | 2015-09-22 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9461859B2 (en) | 2005-03-17 | 2016-10-04 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9520972B2 (en) | 2005-03-17 | 2016-12-13 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
EP1860790A1 (en) | 2005-03-28 | 2007-11-28 | Matsushita Electric Industrial Co., Ltd. | Transmission method and transmission system |
EP1867084B1 (en) * | 2005-03-30 | 2017-11-01 | Apple Inc. | Systems and methods for ofdm channelization |
US7539463B2 (en) * | 2005-03-30 | 2009-05-26 | Intel Corporation | Techniques to enhance diversity for a wireless system |
US9184870B2 (en) * | 2005-04-01 | 2015-11-10 | Qualcomm Incorporated | Systems and methods for control channel signaling |
KR20060106223A (ko) * | 2005-04-06 | 2006-10-12 | 삼성전자주식회사 | 직교 주파수 분할 다중 시스템에서 비트 삽입 및 코드 변조방식의 송신 장치 및 방법 |
US9408220B2 (en) | 2005-04-19 | 2016-08-02 | Qualcomm Incorporated | Channel quality reporting for adaptive sectorization |
US9036538B2 (en) | 2005-04-19 | 2015-05-19 | Qualcomm Incorporated | Frequency hopping design for single carrier FDMA systems |
US7466749B2 (en) * | 2005-05-12 | 2008-12-16 | Qualcomm Incorporated | Rate selection with margin sharing |
US8879511B2 (en) | 2005-10-27 | 2014-11-04 | Qualcomm Incorporated | Assignment acknowledgement for a wireless communication system |
US8611284B2 (en) * | 2005-05-31 | 2013-12-17 | Qualcomm Incorporated | Use of supplemental assignments to decrement resources |
US8565194B2 (en) * | 2005-10-27 | 2013-10-22 | Qualcomm Incorporated | Puncturing signaling channel for a wireless communication system |
US8462859B2 (en) * | 2005-06-01 | 2013-06-11 | Qualcomm Incorporated | Sphere decoding apparatus |
US7643843B2 (en) * | 2005-06-14 | 2010-01-05 | Interdigital Technology Corporation | Method and system for transmit power control in a multiple-input multiple-output wireless communication system |
US9179319B2 (en) * | 2005-06-16 | 2015-11-03 | Qualcomm Incorporated | Adaptive sectorization in cellular systems |
US8599945B2 (en) | 2005-06-16 | 2013-12-03 | Qualcomm Incorporated | Robust rank prediction for a MIMO system |
US9042212B2 (en) | 2005-07-29 | 2015-05-26 | Qualcomm Incorporated | Method and apparatus for communicating network identifiers in a communication system |
US9391751B2 (en) * | 2005-07-29 | 2016-07-12 | Qualcomm Incorporated | System and method for frequency diversity |
US8885628B2 (en) | 2005-08-08 | 2014-11-11 | Qualcomm Incorporated | Code division multiplexing in a single-carrier frequency division multiple access system |
US8559295B2 (en) * | 2005-08-15 | 2013-10-15 | Motorola Mobility Llc | Method and apparatus for pilot signal transmission |
ES2415355T3 (es) | 2005-08-18 | 2013-07-25 | Mosaid Technologies Incorporated | Sistema de comunicación inalámbrico de múltiple entrada múltiple salida |
US9209956B2 (en) * | 2005-08-22 | 2015-12-08 | Qualcomm Incorporated | Segment sensitive scheduling |
US20070041457A1 (en) | 2005-08-22 | 2007-02-22 | Tamer Kadous | Method and apparatus for providing antenna diversity in a wireless communication system |
EP1929684A4 (en) | 2005-08-23 | 2010-05-19 | Nortel Networks Ltd | ADAPTIVE TWO-DIMENSIONAL CHANNEL INTERPOLATION |
US8073063B2 (en) | 2005-08-23 | 2011-12-06 | Nortel Networks Limited | Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning |
US8644292B2 (en) * | 2005-08-24 | 2014-02-04 | Qualcomm Incorporated | Varied transmission time intervals for wireless communication system |
EP1929683B1 (en) | 2005-08-26 | 2011-06-22 | The DIRECTV Group, Inc. | Method and apparatus for determining scrambling codes for signal transmission |
AU2006203698A1 (en) * | 2005-08-26 | 2007-03-15 | Nec Australia Pty Ltd | Transmit diversity scheme |
US20070047495A1 (en) * | 2005-08-29 | 2007-03-01 | Qualcomm Incorporated | Reverse link soft handoff in a wireless multiple-access communication system |
US9136974B2 (en) | 2005-08-30 | 2015-09-15 | Qualcomm Incorporated | Precoding and SDMA support |
JP3989512B2 (ja) * | 2005-09-15 | 2007-10-10 | 三洋電機株式会社 | 無線装置 |
JP4799293B2 (ja) * | 2005-09-21 | 2011-10-26 | 三洋電機株式会社 | 無線装置 |
US7864777B1 (en) * | 2005-09-30 | 2011-01-04 | Nortel Networks Limited | Transmission format selection for optimizing transmission of delay sensitive traffic |
EP1971064B1 (en) | 2005-09-30 | 2018-04-11 | Apple Inc. | Initial access channel for scalable wireless mobile communication networks |
TWI324002B (en) * | 2005-10-06 | 2010-04-21 | Integrated System Solution Corp | Methods and apparatus for circulation transmissions for ofdm-based mimo systems |
KR100981495B1 (ko) * | 2005-10-12 | 2010-09-10 | 삼성전자주식회사 | 통신 시스템에서 데이터 송신 방법 및 장치 |
US9225488B2 (en) * | 2005-10-27 | 2015-12-29 | Qualcomm Incorporated | Shared signaling channel |
US8582509B2 (en) | 2005-10-27 | 2013-11-12 | Qualcomm Incorporated | Scalable frequency band operation in wireless communication systems |
US8693405B2 (en) * | 2005-10-27 | 2014-04-08 | Qualcomm Incorporated | SDMA resource management |
US9210651B2 (en) * | 2005-10-27 | 2015-12-08 | Qualcomm Incorporated | Method and apparatus for bootstraping information in a communication system |
US9172453B2 (en) * | 2005-10-27 | 2015-10-27 | Qualcomm Incorporated | Method and apparatus for pre-coding frequency division duplexing system |
US9144060B2 (en) * | 2005-10-27 | 2015-09-22 | Qualcomm Incorporated | Resource allocation for shared signaling channels |
US9088384B2 (en) | 2005-10-27 | 2015-07-21 | Qualcomm Incorporated | Pilot symbol transmission in wireless communication systems |
US8045512B2 (en) | 2005-10-27 | 2011-10-25 | Qualcomm Incorporated | Scalable frequency band operation in wireless communication systems |
US7661037B2 (en) * | 2005-10-27 | 2010-02-09 | Samsung Electronics Co., Ltd. | LDPC concatenation rules for IEEE 802.11n systems |
US9225416B2 (en) | 2005-10-27 | 2015-12-29 | Qualcomm Incorporated | Varied signaling channels for a reverse link in a wireless communication system |
US8477684B2 (en) * | 2005-10-27 | 2013-07-02 | Qualcomm Incorporated | Acknowledgement of control messages in a wireless communication system |
BRPI0617861A2 (pt) * | 2005-10-28 | 2012-04-17 | Matsushita Electric Ind Co Ltd | dispositivo de transmissão, dispositivo de recepção, método de transmissão, método de recepção e sistema de comunicação sem fio |
US8582548B2 (en) | 2005-11-18 | 2013-11-12 | Qualcomm Incorporated | Frequency division multiple access schemes for wireless communication |
US7707479B2 (en) * | 2005-12-13 | 2010-04-27 | Samsung Electronics Co., Ltd. | Method of generating structured irregular low density parity checkcodes for wireless systems |
US7584406B2 (en) | 2005-12-20 | 2009-09-01 | Samsung Electronics Co., Ltd. | LDPC concatenation rules for IEEE 802.11n system with packets length specific in octets |
US7620880B2 (en) * | 2005-12-20 | 2009-11-17 | Samsung Electronics Co., Ltd. | LDPC concatenation rules for IEEE 802.11n system with packets length specified in OFDM symbols |
US8831607B2 (en) * | 2006-01-05 | 2014-09-09 | Qualcomm Incorporated | Reverse link other sector communication |
TWI562572B (en) | 2006-01-11 | 2016-12-11 | Interdigital Tech Corp | Method and apparatus for implementing space time processing with unequal modulation and coding schemes |
CN101375570B (zh) * | 2006-01-20 | 2014-06-25 | 高通股份有限公司 | 用于无线通信系统中导频多路复用的方法和装置 |
US8130857B2 (en) * | 2006-01-20 | 2012-03-06 | Qualcomm Incorporated | Method and apparatus for pilot multiplexing in a wireless communication system |
WO2007091874A1 (en) * | 2006-02-11 | 2007-08-16 | Samsung Electronics Co., Ltd. | Procede et systeme d'attribution de ressources de transmission et d'indication des ressources de transmission attribuees pour une diversite de frequence |
KR100849329B1 (ko) * | 2006-02-11 | 2008-07-29 | 삼성전자주식회사 | 주파수 다이버시티를 위한 전송 자원 할당과 시그널링 방법및 장치 |
US9461736B2 (en) * | 2006-02-21 | 2016-10-04 | Qualcomm Incorporated | Method and apparatus for sub-slot packets in wireless communication |
US8493958B2 (en) * | 2006-02-21 | 2013-07-23 | Qualcomm Incorporated | Flexible payload control in data-optimized communication systems |
US8689025B2 (en) * | 2006-02-21 | 2014-04-01 | Qualcomm Incorporated | Reduced terminal power consumption via use of active hold state |
US8077595B2 (en) | 2006-02-21 | 2011-12-13 | Qualcomm Incorporated | Flexible time-frequency multiplexing structure for wireless communication |
KR101260835B1 (ko) | 2006-02-28 | 2013-05-06 | 삼성전자주식회사 | 다중 안테나 시스템의 신호 송수신장치 및 방법 |
KR100950654B1 (ko) * | 2006-03-03 | 2010-04-01 | 삼성전자주식회사 | 다중 입력 다중 출력 방식을 사용하는 통신 시스템에서신호 송수신 장치 및 방법 |
JP2009520385A (ja) * | 2006-03-07 | 2009-05-21 | クゥアルコム・インコーポレイテッド | 直交周波数分割多元アクセス通信システムの帯域内レート制御 |
KR100817497B1 (ko) | 2006-03-10 | 2008-03-27 | 한국전자통신연구원 | 다중 안테나를 위한 심볼 생성 장치 및 방법 |
KR101208538B1 (ko) * | 2006-03-14 | 2012-12-05 | 엘지전자 주식회사 | 다중 안테나를 사용하는 시스템에서의 신호 전송 방법 |
KR100889748B1 (ko) | 2006-03-24 | 2009-03-24 | 한국전자통신연구원 | 다중 송신안테나에 의한 브로드캐스트/멀티캐스트 서비스를제공하는 매크로다이버시티 송신 장치 및 그 방법 |
US8543070B2 (en) | 2006-04-24 | 2013-09-24 | Qualcomm Incorporated | Reduced complexity beam-steered MIMO OFDM system |
US8023574B2 (en) * | 2006-05-05 | 2011-09-20 | Intel Corporation | Method and apparatus to support scalability in a multicarrier network |
KR101345351B1 (ko) | 2006-06-08 | 2013-12-30 | 코닌클리케 필립스 엔.브이. | 공간-시간-주파수 코딩 방법 및 장치 |
CN101502022B (zh) | 2006-06-27 | 2013-09-11 | 日本电气株式会社 | 通信系统、发送器、接收器以及多路存取方法 |
JP5061189B2 (ja) * | 2006-08-07 | 2012-10-31 | インターデイジタル テクノロジー コーポレーション | マルチ・ユーザーの仮想mimoを実施するための方法、装置、およびシステム |
SG141259A1 (en) * | 2006-09-12 | 2008-04-28 | Oki Techno Ct Singapore Pte | Apparatus and method for receiving digital video signals |
WO2008050788A1 (fr) * | 2006-10-24 | 2008-05-02 | Mitsubishi Electric Corporation | Appareil émetteur, appareil récepteur, appareil de communication et système de communication |
KR101382614B1 (ko) | 2006-11-16 | 2014-04-10 | 한국전자통신연구원 | 하향링크 프레임을 생성하고 전송하는 방법 |
US7610036B2 (en) * | 2007-01-08 | 2009-10-27 | Mitsubishi Electric Research Laboratories, Inc. | Space-time-frequency sensing of RF spectrum in cognitive radios |
EP1959603A1 (en) | 2007-02-15 | 2008-08-20 | Mitsubishi Electric Information Technology Center Europe B.V. | Method of radio data emission, emitter and receiver using the method |
US8254492B2 (en) * | 2007-04-26 | 2012-08-28 | Samsung Electronics Co., Ltd. | Transmit diversity in a wireless communication system |
WO2008133439A1 (en) * | 2007-04-26 | 2008-11-06 | Samsung Electronics Co., Ltd. | Transmit diversity in a wireless communication system |
US8009758B2 (en) * | 2007-06-20 | 2011-08-30 | Samsung Electronics Co., Ltd | Apparatus and method for channel-interleaving and channel-deinterleaving data in a wireless communication system |
KR101365565B1 (ko) | 2007-08-08 | 2014-02-21 | 포항공과대학교 산학협력단 | 공간 주파수 블록 부호화 신호 처리 시스템 |
RU2431237C1 (ru) * | 2007-08-30 | 2011-10-10 | ЭлДжи ЭЛЕКТРОНИКС ИНК. | Устройство для передачи и приема и способ передачи и приема сигнала |
US7994969B2 (en) * | 2007-09-21 | 2011-08-09 | The Regents Of The University Of Michigan | OFDM frequency scanning radar |
KR101455992B1 (ko) * | 2007-11-14 | 2014-11-03 | 엘지전자 주식회사 | 다중 안테나 시스템에서 신호 전송 방법 |
JP5109707B2 (ja) * | 2008-02-19 | 2012-12-26 | コニカミノルタビジネステクノロジーズ株式会社 | 定着装置及び画像形成装置 |
JP4626669B2 (ja) * | 2008-04-14 | 2011-02-09 | ソニー株式会社 | 送信装置、通信システム、送信方法及びプログラム |
GB2459284A (en) * | 2008-04-17 | 2009-10-21 | Stephen George Nunney | MIMO spatial multiplexing system |
WO2009148272A2 (en) * | 2008-06-05 | 2009-12-10 | Electronics And Telecommunications Research Institute | Apparatus and method for mapping symbol |
KR101509728B1 (ko) * | 2008-06-05 | 2015-04-06 | 한국전자통신연구원 | 심볼 매핑 방법 및 장치 |
CN102187594B (zh) * | 2008-08-20 | 2014-10-29 | Lg伊诺特有限公司 | 多输入多输出通信系统及其控制方法 |
JP2010074398A (ja) * | 2008-09-17 | 2010-04-02 | Ntt Docomo Inc | Ofdm変復調方法、ofdm変調装置、ofdm復調装置およびofdm変復調システム |
KR101013652B1 (ko) * | 2008-12-30 | 2011-02-10 | 주식회사 세아네트웍스 | 무선 통신 시스템의 데이터 송신 방법 |
US20100232384A1 (en) * | 2009-03-13 | 2010-09-16 | Qualcomm Incorporated | Channel estimation based upon user specific and common reference signals |
US8560696B2 (en) * | 2009-04-28 | 2013-10-15 | Intel Corporation | Transmission of advanced-MAP information elements in mobile networks |
US8498252B2 (en) * | 2009-07-06 | 2013-07-30 | Intel Corporation | Midamble for wireless networks |
US9706599B1 (en) | 2009-07-23 | 2017-07-11 | Marvell International Ltd. | Long wireless local area network (WLAN) packets with midambles |
ES2363905B1 (es) * | 2009-09-18 | 2012-06-22 | Vodafone España, S.A.U. | Diversidad de transmisión multiportadora en utran para hsdpa. |
US8374136B2 (en) | 2009-10-02 | 2013-02-12 | Sharp Laboratories Of America, Inc. | Transmission diversity scheme on physical uplink control channel (PUCCH) with ACK/NACK differentiation |
US8553627B2 (en) * | 2009-10-02 | 2013-10-08 | Sharp Laboratories Of America, Inc. | Transmission diversity scheme on physical uplink control channel (PUCCH) with ACK/NACK differentiation |
US8509326B2 (en) * | 2009-11-16 | 2013-08-13 | Intel Mobile Communications GmbH | OFDM space-time or space-frequency block code transmitter |
US9098274B2 (en) | 2009-12-03 | 2015-08-04 | Intel Corporation | Methods and apparatuses to improve turbo performance for events handling |
DK2541917T3 (en) * | 2010-02-23 | 2015-07-27 | Lg Electronics Inc | TRANSMISSION SIGNAL TRANSMITTER / RECEIVER AND TRANSMISSION SIGNAL TRANSMISSION / RECEIVER |
WO2011105761A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
WO2011105792A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
EP2541918B1 (en) * | 2010-02-23 | 2020-04-29 | LG Electronics Inc. | Broadcasting signal receiver and broadcasting signal reception method |
WO2011105745A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
WO2011105763A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
WO2011105786A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
WO2011105797A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
EP2541923B1 (en) * | 2010-02-23 | 2017-06-07 | LG Electronics Inc. | Broadcasting signal transmitter/receiver and broadcasting signal transmission/reception method |
WO2011105795A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
WO2011105743A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
EP3133758B1 (en) * | 2010-02-23 | 2019-09-18 | Lg Electronics Inc. | Broadcasting signal receiver and method thereof |
EP2541905A4 (en) * | 2010-02-23 | 2014-10-15 | Lg Electronics Inc | BROADCASTING SIGNAL TRANSCEIVER AND METHOD OF TRANSMITTING BROADCAST SIGNAL TRANSMITTING |
WO2011105804A2 (ko) * | 2010-02-23 | 2011-09-01 | 엘지전자 주식회사 | 방송 신호 송신 장치, 방송 신호 수신 장치, 및 방송 신호 송/수신 장치에서 방송 신호 송수신 방법 |
WO2011111963A2 (ko) * | 2010-03-08 | 2011-09-15 | 엘지전자 주식회사 | 방송 신호 송/수신기 및 방송 신호 송/수신 방법 |
KR20110113897A (ko) | 2010-04-12 | 2011-10-19 | 주식회사 팬택 | 다수의 요소 반송파를 운영하는 무선 통신 시스템에서 업링크 타이밍 그룹에 대한 정보를 송수신하는 방법 및 장치 |
US8781006B2 (en) * | 2010-05-21 | 2014-07-15 | Qualcomm Incorporated | Link adaptation in multi-carrier communication systems |
CN102404072B (zh) | 2010-09-08 | 2013-03-20 | 华为技术有限公司 | 一种信息比特发送方法、装置和系统 |
CN107104716B (zh) * | 2011-04-19 | 2020-10-02 | 太阳专利托管公司 | 信号生成方法及装置、信号处理方法及装置 |
KR101995266B1 (ko) | 2012-08-17 | 2019-07-02 | 삼성전자 주식회사 | 빔포밍을 이용한 시스템에서 시스템 액세스 방법 및 장치 |
US20140269768A1 (en) * | 2013-03-14 | 2014-09-18 | Qualcomm Incorporated | Methods and apparatus for increasing diversity in downlink transmissions |
EP3033881A4 (en) * | 2013-08-14 | 2017-05-03 | LG Electronics Inc. | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals |
US9210022B2 (en) | 2013-11-25 | 2015-12-08 | Lg Electronics Inc. | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast, signals, method for transmitting broadcast signals and method for receiving broadcast signals |
KR101721293B1 (ko) * | 2013-12-31 | 2017-04-10 | 한국전자통신연구원 | 무선랜 시스템에서 채널을 추정하는 장치 및 방법 |
CN104753653B (zh) * | 2013-12-31 | 2019-07-12 | 中兴通讯股份有限公司 | 一种解速率匹配的方法、装置和接收侧设备 |
KR102323765B1 (ko) * | 2014-02-13 | 2021-11-11 | 한국전자통신연구원 | 부호율이 3/15인 ldpc 부호어를 위한 비균등 16-심볼 신호성상을 이용한 변조기 및 이를 이용한 변조 방법 |
US9520898B2 (en) * | 2014-02-13 | 2016-12-13 | Electronics And Telecommunications Research Institute | Modulator and modulation method using non-uniform 16-symbol signal constellation for low-density parity check codeword having 3/15 code rate |
CA2881540C (en) * | 2014-02-13 | 2017-08-01 | Electronics And Telecommunications Research Institute | Modulator and modulation method using non-uniform 16-symbol signal constellation for low-density parity check codeword having 4/15 code rate |
KR101692608B1 (ko) * | 2014-02-17 | 2017-01-03 | 연세대학교 원주산학협력단 | 연판정 값을 기초로 한 오류 검출용 토글링 시퀀스 결정 방법 및 에러 패턴 결정 방법 및 그 장치 |
US9602141B2 (en) | 2014-04-21 | 2017-03-21 | Sandisk Technologies Llc | High-speed multi-block-row layered decoder for low density parity check (LDPC) codes |
US9748973B2 (en) * | 2014-04-22 | 2017-08-29 | Sandisk Technologies Llc | Interleaved layered decoder for low-density parity check codes |
US9503125B2 (en) | 2014-05-08 | 2016-11-22 | Sandisk Technologies Llc | Modified trellis-based min-max decoder for non-binary low-density parity-check error-correcting codes |
CN106664187A (zh) | 2014-06-02 | 2017-05-10 | 马维尔国际贸易有限公司 | 高效正交频分复用(ofdm)物理层(phy) |
EP3155779B1 (en) | 2014-06-11 | 2019-10-16 | Marvell World Trade Ltd. | Compressed preamble for a wireless communication system |
CN107005286B (zh) * | 2014-11-25 | 2020-09-29 | 华为技术有限公司 | Fbmc的发射分集传输方法、发送端装置及接收端装置 |
WO2016085083A1 (ko) * | 2014-11-26 | 2016-06-02 | 엘지전자(주) | 방송 신호 송수신 장치 및 방법 |
US10461891B2 (en) * | 2015-12-18 | 2019-10-29 | Qualcomm Incorporated | Staggered pilot placement |
KR20170075627A (ko) | 2015-12-23 | 2017-07-03 | 삼성전자주식회사 | 통신 또는 방송 시스템에서 채널 부호화/복호화 방법 및 장치 |
WO2017111559A1 (en) | 2015-12-23 | 2017-06-29 | Samsung Electronics Co., Ltd. | Apparatus and method for encoding and decoding channel in communication or broadcasting system |
US9967122B2 (en) | 2016-01-19 | 2018-05-08 | Qualcomm Incorporated | Techniques for extending an OFDM waveform for multiplexing |
US10069555B2 (en) | 2016-04-13 | 2018-09-04 | Qualcomm Incorporated | System and method for beam management |
US10425200B2 (en) | 2016-04-13 | 2019-09-24 | Qualcomm Incorporated | System and method for beam adjustment request |
US11394398B2 (en) * | 2017-05-05 | 2022-07-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Adaptive selection and efficient storage of information bit locations for polar codes |
EP3635926B1 (en) | 2017-06-09 | 2024-03-27 | Marvell World Trade Ltd. | Packets with midambles having compressed ofdm symbols |
WO2019060407A1 (en) | 2017-09-22 | 2019-03-28 | Marvell World Trade Ltd. | DETERMINING THE NUMBER OF MIDAMBULES IN A PACKET |
CN109241581B (zh) * | 2018-08-16 | 2022-12-06 | 中国电建集团河北省电力勘测设计研究院有限公司 | 基于kks编码实现二、三维交互关联的方法 |
GB201820161D0 (en) * | 2018-12-11 | 2019-01-23 | Nordic Semiconductor Asa | Radio devices with switchable antennas |
Family Cites Families (518)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4679227A (en) | 1985-05-20 | 1987-07-07 | Telebit Corporation | Ensemble modem structure for imperfect transmission media |
CA1261080A (en) * | 1985-12-30 | 1989-09-26 | Shunichiro Tejima | Satellite communications system with random multiple access and time slot reservation |
JPH063956Y2 (ja) | 1986-03-14 | 1994-02-02 | 松下電工株式会社 | 電動ガレ−ジ扉 |
US4750198A (en) | 1986-12-12 | 1988-06-07 | Astronet Corporation/Plessey U.K. | Cellular radiotelephone system providing diverse separately-accessible groups of channels |
US4797879A (en) | 1987-06-05 | 1989-01-10 | American Telephone And Telegraph Company At&T Bell Laboratories | Packet switched interconnection protocols for a star configured optical lan |
JPH03104430U (zh) | 1990-02-14 | 1991-10-30 | ||
US5081679A (en) | 1990-07-20 | 1992-01-14 | Ericsson Ge Mobile Communications Holding Inc. | Resynchronization of encryption systems upon handoff |
IL100213A (en) | 1990-12-07 | 1995-03-30 | Qualcomm Inc | Mikrata Kedma phone system and its antenna distribution system |
US5239677A (en) | 1991-07-01 | 1993-08-24 | Motorola, Inc. | Method and apparatus for initiating communication on an assigned frequency |
IT1250515B (it) | 1991-10-07 | 1995-04-08 | Sixtel Spa | Rete per area locale senza fili. |
US5241544A (en) | 1991-11-01 | 1993-08-31 | Motorola, Inc. | Multi-channel tdm communication system slot phase correction |
US5592490A (en) | 1991-12-12 | 1997-01-07 | Arraycomm, Inc. | Spectrally efficient high capacity wireless communication systems |
US6850252B1 (en) * | 1999-10-05 | 2005-02-01 | Steven M. Hoffberg | Intelligent electronic appliance system and method |
US5295159A (en) * | 1992-04-17 | 1994-03-15 | Bell Communications Research, Inc. | Coordinated coding for digital transmission |
RU2015281C1 (ru) | 1992-09-22 | 1994-06-30 | Борис Михайлович Кондрашов | Запорное устройство |
GB2300337B (en) | 1992-10-05 | 1997-03-26 | Ericsson Ge Mobile Communicat | Digital control channel |
US5404355A (en) | 1992-10-05 | 1995-04-04 | Ericsson Ge Mobile Communications, Inc. | Method for transmitting broadcast information in a digital control channel |
DE69327837T2 (de) | 1992-12-01 | 2000-10-12 | Koninkl Philips Electronics Nv | Teilband-Diversityübertragungssystem |
US5471647A (en) | 1993-04-14 | 1995-11-28 | The Leland Stanford Junior University | Method for minimizing cross-talk in adaptive transmission antennas |
US5479447A (en) | 1993-05-03 | 1995-12-26 | The Board Of Trustees Of The Leland Stanford, Junior University | Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines |
US5483667A (en) | 1993-07-08 | 1996-01-09 | Northern Telecom Limited | Frequency plan for a cellular network |
DE69423546T2 (de) | 1993-07-09 | 2000-09-21 | Koninkl Philips Electronics Nv | Telekommunikationsnetzwerk, Hauptstation und Nebenstation zum Gebrauch in solchem Netzwerk |
ZA946674B (en) | 1993-09-08 | 1995-05-02 | Qualcomm Inc | Method and apparatus for determining the transmission data rate in a multi-user communication system |
US5506861A (en) | 1993-11-22 | 1996-04-09 | Ericsson Ge Mobile Comminications Inc. | System and method for joint demodulation of CDMA signals |
US5490087A (en) | 1993-12-06 | 1996-02-06 | Motorola, Inc. | Radio channel access control |
US5418813A (en) | 1993-12-06 | 1995-05-23 | Motorola, Inc. | Method and apparatus for creating a composite waveform |
US5422733A (en) | 1994-02-04 | 1995-06-06 | Motorola, Inc. | Method and apparatus for facsimile communication of first and second type information with selective call communication systems |
US5491837A (en) | 1994-03-07 | 1996-02-13 | Ericsson Inc. | Method and system for channel allocation using power control and mobile-assisted handover measurements |
US5493712A (en) * | 1994-03-23 | 1996-02-20 | At&T Corp. | Fast AGC for TDMA radio systems |
BR9507859A (pt) | 1994-05-02 | 1997-09-16 | Motorola Inc | Aparelho e método de registro flexivel de múltiplos subcanais |
US5677909A (en) | 1994-05-11 | 1997-10-14 | Spectrix Corporation | Apparatus for exchanging data between a central station and a plurality of wireless remote stations on a time divided commnication channel |
US6157343A (en) * | 1996-09-09 | 2000-12-05 | Telefonaktiebolaget Lm Ericsson | Antenna array calibration |
DE4425713C1 (de) | 1994-07-20 | 1995-04-20 | Inst Rundfunktechnik Gmbh | Verfahren zur Vielträger Modulation und Demodulation von digital codierten Daten |
FR2724084B1 (fr) | 1994-08-31 | 1997-01-03 | Alcatel Mobile Comm France | Systeme de transmission d'informations par un canal de transmission variant dans le temps, et equipements d'emission et de reception correspondants |
US5710768A (en) | 1994-09-30 | 1998-01-20 | Qualcomm Incorporated | Method of searching for a bursty signal |
MY120873A (en) | 1994-09-30 | 2005-12-30 | Qualcomm Inc | Multipath search processor for a spread spectrum multiple access communication system |
JPH08274756A (ja) | 1995-03-30 | 1996-10-18 | Toshiba Corp | 無線通信システム |
JP3231575B2 (ja) * | 1995-04-18 | 2001-11-26 | 三菱電機株式会社 | 無線データ伝送装置 |
KR0155818B1 (ko) | 1995-04-29 | 1998-11-16 | 김광호 | 다중 반송파 전송시스템에서 적응형 전력 분배 방법 및 장치 |
US5606729A (en) * | 1995-06-21 | 1997-02-25 | Motorola, Inc. | Method and apparatus for implementing a received signal quality measurement in a radio communication system |
US5729542A (en) | 1995-06-28 | 1998-03-17 | Motorola, Inc. | Method and apparatus for communication system access |
US7929498B2 (en) | 1995-06-30 | 2011-04-19 | Interdigital Technology Corporation | Adaptive forward power control and adaptive reverse power control for spread-spectrum communications |
US5638369A (en) | 1995-07-05 | 1997-06-10 | Motorola, Inc. | Method and apparatus for inbound channel selection in a communication system |
DE69535033T2 (de) | 1995-07-11 | 2007-03-08 | Alcatel | Zuweisung von Kapazität bei OFDM |
GB9514659D0 (en) | 1995-07-18 | 1995-09-13 | Northern Telecom Ltd | An antenna downlink beamsteering arrangement |
US5867539A (en) | 1995-07-21 | 1999-02-02 | Hitachi America, Ltd. | Methods and apparatus for reducing the effect of impulse noise on receivers |
JP2802255B2 (ja) | 1995-09-06 | 1998-09-24 | 株式会社次世代デジタルテレビジョン放送システム研究所 | 直交周波数分割多重伝送方式及びそれを用いる送信装置と受信装置 |
GB9521739D0 (en) | 1995-10-24 | 1996-01-03 | Nat Transcommunications Ltd | Decoding carriers encoded using orthogonal frequency division multiplexing |
US6005876A (en) | 1996-03-08 | 1999-12-21 | At&T Corp | Method and apparatus for mobile data communication |
US5699365A (en) | 1996-03-27 | 1997-12-16 | Motorola, Inc. | Apparatus and method for adaptive forward error correction in data communications |
US5924015A (en) | 1996-04-30 | 1999-07-13 | Trw Inc | Power control method and apparatus for satellite based telecommunications system |
JPH09307526A (ja) | 1996-05-17 | 1997-11-28 | Mitsubishi Electric Corp | デジタル放送受信機 |
EP0807989B1 (en) | 1996-05-17 | 2001-06-27 | Motorola Ltd | Devices for transmitter path weights and methods therefor |
JPH09327073A (ja) | 1996-06-07 | 1997-12-16 | N T T Ido Tsushinmo Kk | Cdma移動通信システムにおけるパイロットチャネル配置および送信方法 |
US5822374A (en) | 1996-06-07 | 1998-10-13 | Motorola, Inc. | Method for fine gains adjustment in an ADSL communications system |
FI101920B1 (fi) | 1996-06-07 | 1998-09-15 | Nokia Telecommunications Oy | Kanavanvarausmenetelmä pakettiverkkoa varten |
US6072779A (en) | 1997-06-12 | 2000-06-06 | Aware, Inc. | Adaptive allocation for variable bandwidth multicarrier communication |
US6798735B1 (en) | 1996-06-12 | 2004-09-28 | Aware, Inc. | Adaptive allocation for variable bandwidth multicarrier communication |
US6097771A (en) | 1996-07-01 | 2000-08-01 | Lucent Technologies Inc. | Wireless communications system having a layered space-time architecture employing multi-element antennas |
JPH1051402A (ja) | 1996-08-01 | 1998-02-20 | Nec Corp | 受信電界検出回路 |
US6067292A (en) | 1996-08-20 | 2000-05-23 | Lucent Technologies Inc | Pilot interference cancellation for a coherent wireless code division multiple access receiver |
EP0931388B1 (en) | 1996-08-29 | 2003-11-05 | Cisco Technology, Inc. | Spatio-temporal processing for communication |
JP2001359152A (ja) | 2000-06-14 | 2001-12-26 | Sony Corp | 無線通信システム、無線基地局装置、無線移動局装置、無線ゾーン割当て方法及び無線通信方法 |
JP2846860B2 (ja) * | 1996-10-01 | 1999-01-13 | ユニデン株式会社 | スペクトル拡散通信方式を用いた送信機、受信機、通信システム及び通信方法 |
US6275543B1 (en) | 1996-10-11 | 2001-08-14 | Arraycomm, Inc. | Method for reference signal generation in the presence of frequency offsets in a communications station with spatial processing |
TW496620U (en) | 1996-10-16 | 2002-07-21 | Behavior Tech Computer Corp | Wireless data transmitting apparatus |
US5886988A (en) | 1996-10-23 | 1999-03-23 | Arraycomm, Inc. | Channel assignment and call admission control for spatial division multiple access communication systems |
US6049548A (en) | 1996-11-22 | 2000-04-11 | Stanford Telecommunications, Inc. | Multi-access CS-P/CD-E system and protocols on satellite channels applicable to a group of mobile users in close proximity |
IL130034A (en) | 1996-11-26 | 2003-04-10 | Trw Inc | Cochannel signal processing system |
US5896376A (en) | 1996-12-13 | 1999-04-20 | Ericsson Inc. | Optimal use of logical channels within a mobile telecommunications network |
US6232918B1 (en) | 1997-01-08 | 2001-05-15 | Us Wireless Corporation | Antenna array calibration in wireless communication systems |
JPH10209956A (ja) | 1997-01-28 | 1998-08-07 | Nippon Telegr & Teleph Corp <Ntt> | 無線パケット通信方法 |
US6128276A (en) | 1997-02-24 | 2000-10-03 | Radix Wireless, Inc. | Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays |
JPH10303794A (ja) | 1997-02-27 | 1998-11-13 | Mitsubishi Electric Corp | 既知系列検出器 |
US6084915A (en) | 1997-03-03 | 2000-07-04 | 3Com Corporation | Signaling method having mixed-base shell map indices |
US6175550B1 (en) | 1997-04-01 | 2001-01-16 | Lucent Technologies, Inc. | Orthogonal frequency division multiplexing system with dynamically scalable operating parameters and method thereof |
KR100267856B1 (ko) | 1997-04-16 | 2000-10-16 | 윤종용 | 이동통신시스템에서오버헤드채널관리방법및장치 |
US6308080B1 (en) | 1997-05-16 | 2001-10-23 | Texas Instruments Incorporated | Power control in point-to-multipoint systems |
US6008760A (en) | 1997-05-23 | 1999-12-28 | Genghis Comm | Cancellation system for frequency reuse in microwave communications |
FR2764143A1 (fr) | 1997-05-27 | 1998-12-04 | Philips Electronics Nv | Procede de determination d'un format d'emission de symboles dans un systeme de transmission et systeme |
US5867478A (en) * | 1997-06-20 | 1999-02-02 | Motorola, Inc. | Synchronous coherent orthogonal frequency division multiplexing system, method, software and device |
US6067458A (en) | 1997-07-01 | 2000-05-23 | Qualcomm Incorporated | Method and apparatus for pre-transmission power control using lower rate for high rate communication |
US6108369A (en) | 1997-07-11 | 2000-08-22 | Telefonaktiebolaget Lm Ericsson | Channelization code allocation for radio communication systems |
US6333953B1 (en) | 1997-07-21 | 2001-12-25 | Ericsson Inc. | System and methods for selecting an appropriate detection technique in a radiocommunication system |
EP0895387A1 (de) | 1997-07-28 | 1999-02-03 | Deutsche Thomson-Brandt Gmbh | Erkennung des Übertragungsmodus eines DVB-Signales |
US6141542A (en) | 1997-07-31 | 2000-10-31 | Motorola, Inc. | Method and apparatus for controlling transmit diversity in a communication system |
CN1086061C (zh) | 1997-08-12 | 2002-06-05 | 鸿海精密工业股份有限公司 | 电连接器的固持装置 |
US6131016A (en) | 1997-08-27 | 2000-10-10 | At&T Corp | Method and apparatus for enhancing communication reception at a wireless communication terminal |
JP2991167B2 (ja) | 1997-08-27 | 1999-12-20 | 三菱電機株式会社 | Tdma可変スロット割当方法 |
EP0899896A1 (de) | 1997-08-27 | 1999-03-03 | Siemens Aktiengesellschaft | Verfahren und Einrichtung zur Schätzung räumlicher Parameter von Überstragungskanälen |
US6167031A (en) | 1997-08-29 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for selecting a combination of modulation and channel coding schemes in a digital communication system |
BR9812816A (pt) | 1997-09-15 | 2000-08-08 | Adaptive Telecom Inc | Processos para comunicação sem fio, e para eficientemente determinar na estação base um canal espacial da unidade móvel em um sistema de comunicação sem fio, e, estação base de cdma |
US6389000B1 (en) | 1997-09-16 | 2002-05-14 | Qualcomm Incorporated | Method and apparatus for transmitting and receiving high speed data in a CDMA communication system using multiple carriers |
US6590928B1 (en) | 1997-09-17 | 2003-07-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Frequency hopping piconets in an uncoordinated wireless multi-user system |
AUPO932297A0 (en) | 1997-09-19 | 1997-10-09 | Commonwealth Scientific And Industrial Research Organisation | Medium access control protocol for data communications |
KR100234329B1 (ko) | 1997-09-30 | 1999-12-15 | 윤종용 | Ofdm 시스템 수신기의 fft 윈도우 위치 복원장치 및 그 방법_ |
US6178196B1 (en) * | 1997-10-06 | 2001-01-23 | At&T Corp. | Combined interference cancellation and maximum likelihood decoding of space-time block codes |
US6574211B2 (en) | 1997-11-03 | 2003-06-03 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
US6377812B1 (en) | 1997-11-20 | 2002-04-23 | University Of Maryland | Combined power control and space-time diversity in mobile cellular communications |
US6122247A (en) | 1997-11-24 | 2000-09-19 | Motorola Inc. | Method for reallocating data in a discrete multi-tone communication system |
JPH11163823A (ja) | 1997-11-26 | 1999-06-18 | Victor Co Of Japan Ltd | 直交周波数分割多重信号伝送方法、送信装置及び受信装置 |
US5936569A (en) | 1997-12-02 | 1999-08-10 | Nokia Telecommunications Oy | Method and arrangement for adjusting antenna pattern |
US6154661A (en) | 1997-12-10 | 2000-11-28 | Arraycomm, Inc. | Transmitting on the downlink using one or more weight vectors determined to achieve a desired radiation pattern |
US6084917A (en) * | 1997-12-16 | 2000-07-04 | Integrated Telecom Express | Circuit for configuring and dynamically adapting data and energy parameters in a multi-channel communications system |
US6175588B1 (en) | 1997-12-30 | 2001-01-16 | Motorola, Inc. | Communication device and method for interference suppression using adaptive equalization in a spread spectrum communication system |
US6088387A (en) | 1997-12-31 | 2000-07-11 | At&T Corp. | Multi-channel parallel/serial concatenated convolutional codes and trellis coded modulation encoder/decoder |
EP0929172B1 (en) | 1998-01-06 | 2010-06-02 | MOSAID Technologies Inc. | Multicarrier modulation system, with variable symbol rates |
JP3724940B2 (ja) | 1998-01-08 | 2005-12-07 | 株式会社東芝 | Ofdmダイバーシチ受信装置 |
US5982327A (en) | 1998-01-12 | 1999-11-09 | Motorola, Inc. | Adaptive array method, device, base station and subscriber unit |
US6608874B1 (en) | 1998-01-12 | 2003-08-19 | Hughes Electronics Corporation | Method and apparatus for quadrature multi-pulse modulation of data for spectrally efficient communication |
EP0930752A3 (en) | 1998-01-14 | 1999-10-20 | Motorola, Inc. | Method for allocating data and power in a discrete multitone communication system |
US5973638A (en) | 1998-01-30 | 1999-10-26 | Micronetics Wireless, Inc. | Smart antenna channel simulator and test system |
EP0938208A1 (en) | 1998-02-22 | 1999-08-25 | Sony International (Europe) GmbH | Multicarrier transmission, compatible with the existing GSM system |
WO1999044379A1 (en) | 1998-02-27 | 1999-09-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Multiple access categorization for mobile station |
JP3082756B2 (ja) | 1998-02-27 | 2000-08-28 | 日本電気株式会社 | マルチキャリア伝送システム及びその方法 |
US6141388A (en) | 1998-03-11 | 2000-10-31 | Ericsson Inc. | Received signal quality determination method and systems for convolutionally encoded communication channels |
US6058107A (en) | 1998-04-08 | 2000-05-02 | Motorola, Inc. | Method for updating forward power control in a communication system |
US6317466B1 (en) | 1998-04-15 | 2001-11-13 | Lucent Technologies Inc. | Wireless communications system having a space-time architecture employing multi-element antennas at both the transmitter and receiver |
US6615024B1 (en) | 1998-05-01 | 2003-09-02 | Arraycomm, Inc. | Method and apparatus for determining signatures for calibrating a communication station having an antenna array |
US7123628B1 (en) | 1998-05-06 | 2006-10-17 | Lg Electronics Inc. | Communication system with improved medium access control sub-layer |
US6205410B1 (en) * | 1998-06-01 | 2001-03-20 | Globespan Semiconductor, Inc. | System and method for bit loading with optimal margin assignment |
DE69937828D1 (de) | 1998-06-19 | 2008-02-07 | Ericsson Telefon Ab L M | Rahmensynchronisierungsverfahren und -einrichtungen |
US6795424B1 (en) | 1998-06-30 | 2004-09-21 | Tellabs Operations, Inc. | Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems |
JP2000092009A (ja) | 1998-07-13 | 2000-03-31 | Sony Corp | 通信方法、送信機及び受信機 |
AU4934399A (en) | 1998-07-16 | 2000-02-07 | Samsung Electronics Co., Ltd. | Processing packet data in mobile communication system |
US6154443A (en) | 1998-08-11 | 2000-11-28 | Industrial Technology Research Institute | FFT-based CDMA RAKE receiver system and method |
US6594620B1 (en) | 1998-08-17 | 2003-07-15 | Aspen Technology, Inc. | Sensor validation apparatus and method |
CN1237746C (zh) | 1998-08-18 | 2006-01-18 | 束达网络公司 | 多层载波离散多音通信技术 |
KR100429540B1 (ko) | 1998-08-26 | 2004-08-09 | 삼성전자주식회사 | 이동통신시스템의패킷데이터통신장치및방법 |
US6515617B1 (en) * | 1998-09-01 | 2003-02-04 | Hughes Electronics Corporation | Method and system for position determination using geostationary earth orbit satellite |
DE19842712C1 (de) | 1998-09-17 | 2000-05-04 | Siemens Ag | Verfahren und Anordnung zur Minimierung des Autokorrelationsfehlers bei der Demodulation eines Spreizspektrum-Signals unter Mehrwegeausbreitung |
US6292917B1 (en) | 1998-09-30 | 2001-09-18 | Agere Systems Guardian Corp. | Unequal error protection for digital broadcasting using channel classification |
EP0993212B1 (en) | 1998-10-05 | 2006-05-24 | Sony Deutschland GmbH | Random access channel partitioning scheme for CDMA system |
EP0993211B1 (en) | 1998-10-05 | 2005-01-12 | Sony International (Europe) GmbH | Random access channel partitioning scheme for CDMA system |
US6711121B1 (en) * | 1998-10-09 | 2004-03-23 | At&T Corp. | Orthogonal code division multiplexing for twisted pair channels |
DE59902484D1 (de) * | 1998-10-27 | 2002-10-02 | Siemens Ag | Kanalzuweisungsverfahren und vorrichtung für kodierte und kombinierte informationssätze |
JP4287536B2 (ja) * | 1998-11-06 | 2009-07-01 | パナソニック株式会社 | Ofdm送受信装置及びofdm送受信方法 |
US6178096B1 (en) * | 1998-11-25 | 2001-01-23 | The Whitaker Corporation | Shielding cover having parts held together by latch members |
ES2185244T3 (es) | 1998-12-03 | 2003-04-16 | Fraunhofer Ges Forschung | Aparato y procedimiento para transmitir informacion y aparato y procedimiento para recibir informacion. |
GB9827182D0 (en) | 1998-12-10 | 1999-02-03 | Philips Electronics Nv | Radio communication system |
FI108588B (fi) | 1998-12-15 | 2002-02-15 | Nokia Corp | Menetelmä ja radiojärjestelmä digitaalisen signaalin siirtoon |
JP2000244441A (ja) | 1998-12-22 | 2000-09-08 | Matsushita Electric Ind Co Ltd | Ofdm送受信装置 |
US6266528B1 (en) | 1998-12-23 | 2001-07-24 | Arraycomm, Inc. | Performance monitor for antenna arrays |
US6310909B1 (en) * | 1998-12-23 | 2001-10-30 | Broadcom Corporation | DSL rate adaptation |
US6463290B1 (en) | 1999-01-08 | 2002-10-08 | Trueposition, Inc. | Mobile-assisted network based techniques for improving accuracy of wireless location system |
US6348036B1 (en) * | 1999-01-24 | 2002-02-19 | Genzyme Corporation | Surgical retractor and tissue stabilization device |
RU2152132C1 (ru) | 1999-01-26 | 2000-06-27 | Государственное унитарное предприятие Воронежский научно-исследовательский институт связи | Линия радиосвязи с пространственной модуляцией |
JP3619729B2 (ja) | 2000-01-19 | 2005-02-16 | 松下電器産業株式会社 | 無線受信装置および無線受信方法 |
KR100651457B1 (ko) | 1999-02-13 | 2006-11-28 | 삼성전자주식회사 | 부호분할다중접속 이동통신시스템의 불연속 전송모드에서 연속적인 외부순환 전력제어장치 및 방법 |
US6574267B1 (en) | 1999-03-22 | 2003-06-03 | Golden Bridge Technology, Inc. | Rach ramp-up acknowledgement |
US6363267B1 (en) | 1999-04-07 | 2002-03-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile terminal decode failure procedure in a wireless local area network |
US6346910B1 (en) * | 1999-04-07 | 2002-02-12 | Tei Ito | Automatic array calibration scheme for wireless point-to-multipoint communication networks |
IL145548A0 (en) | 1999-04-12 | 2002-06-30 | Samsung Electronics Co Ltd | Apparatus and method for gated transmission in a cdma communication system |
EP1075093A1 (en) | 1999-08-02 | 2001-02-07 | Interuniversitair Micro-Elektronica Centrum Vzw | A method and apparatus for multi-user transmission |
US6594798B1 (en) | 1999-05-21 | 2003-07-15 | Microsoft Corporation | Receiver-driven layered error correction multicast over heterogeneous packet networks |
US6532562B1 (en) * | 1999-05-21 | 2003-03-11 | Microsoft Corp | Receiver-driven layered error correction multicast over heterogeneous packet networks |
US6594473B1 (en) * | 1999-05-28 | 2003-07-15 | Texas Instruments Incorporated | Wireless system with transmitter having multiple transmit antennas and combining open loop and closed loop transmit diversities |
KR100605978B1 (ko) | 1999-05-29 | 2006-07-28 | 삼성전자주식회사 | 부호분할다중접속 이동통신시스템의 불연속 전송모드에서 연속적인 외부순환 전력제어를 위한 송수신 장치 및 방법 |
US7072410B1 (en) | 1999-06-01 | 2006-07-04 | Peter Monsen | Multiple access system and method for multibeam digital radio systems |
US6141567A (en) | 1999-06-07 | 2000-10-31 | Arraycomm, Inc. | Apparatus and method for beamforming in a changing-interference environment |
US6385264B1 (en) | 1999-06-08 | 2002-05-07 | Qualcomm Incorporated | Method and apparatus for mitigating interference between base stations in a wideband CDMA system |
US6976262B1 (en) | 1999-06-14 | 2005-12-13 | Sun Microsystems, Inc. | Web-based enterprise management with multiple repository capability |
WO2001005067A1 (en) | 1999-07-08 | 2001-01-18 | Samsung Electronics Co., Ltd | Data rate detection device and method for a mobile communication system |
US6163296A (en) | 1999-07-12 | 2000-12-19 | Lockheed Martin Corp. | Calibration and integrated beam control/conditioning system for phased-array antennas |
RU2168278C2 (ru) | 1999-07-16 | 2001-05-27 | Корпорация "Самсунг Электроникс" | Способ произвольного доступа абонентов мобильной станции |
US6532225B1 (en) * | 1999-07-27 | 2003-03-11 | At&T Corp | Medium access control layer for packetized wireless systems |
US7027464B1 (en) | 1999-07-30 | 2006-04-11 | Matsushita Electric Industrial Co., Ltd. | OFDM signal transmission scheme, and OFDM signal transmitter/receiver |
US6067290A (en) | 1999-07-30 | 2000-05-23 | Gigabit Wireless, Inc. | Spatial multiplexing in a cellular network |
JP2001044930A (ja) | 1999-07-30 | 2001-02-16 | Matsushita Electric Ind Co Ltd | 無線通信装置および無線通信方法 |
US6721339B2 (en) * | 1999-08-17 | 2004-04-13 | Lucent Technologies Inc. | Method of providing downlink transmit diversity |
US6735188B1 (en) | 1999-08-27 | 2004-05-11 | Tachyon, Inc. | Channel encoding and decoding method and apparatus |
JP4284773B2 (ja) | 1999-09-07 | 2009-06-24 | ソニー株式会社 | 送信装置、受信装置、通信システム、送信方法及び通信方法 |
US6278726B1 (en) | 1999-09-10 | 2001-08-21 | Interdigital Technology Corporation | Interference cancellation in a spread spectrum communication system |
US6115406A (en) | 1999-09-10 | 2000-09-05 | Interdigital Technology Corporation | Transmission using an antenna array in a CDMA communication system |
US6426971B1 (en) | 1999-09-13 | 2002-07-30 | Qualcomm Incorporated | System and method for accurately predicting signal to interference and noise ratio to improve communications system performance |
SG80071A1 (en) | 1999-09-24 | 2001-04-17 | Univ Singapore | Downlink beamforming method |
JP3421671B2 (ja) | 1999-09-30 | 2003-06-30 | 独立行政法人通信総合研究所 | 通信システム、選択装置、送信装置、受信装置、選択方法、送信方法、受信方法、および、情報記録媒体 |
KR100429529B1 (ko) | 1999-10-02 | 2004-05-03 | 삼성전자주식회사 | 부호분할다중접속 통신시스템의 제어채널신호를단속적으로 송수신하는 장치 및 방법 |
DE19950005A1 (de) | 1999-10-18 | 2001-04-19 | Bernhard Walke | Verfahren zum Betrieb drahtloser Basisstationen für paketvermittelnde Funksysteme mit garantierter Dienstgüte |
DE19951525C2 (de) | 1999-10-26 | 2002-01-24 | Siemens Ag | Verfahren zum Kalibrieren einer elektronisch phasengesteuerten Gruppenantenne in Funk-Kommunikationssystemen |
US6492942B1 (en) | 1999-11-09 | 2002-12-10 | Com Dev International, Inc. | Content-based adaptive parasitic array antenna system |
JP3416597B2 (ja) | 1999-11-19 | 2003-06-16 | 三洋電機株式会社 | 無線基地局 |
US7088671B1 (en) | 1999-11-24 | 2006-08-08 | Peter Monsen | Multiple access technique for downlink multibeam digital radio systems |
US7110785B1 (en) | 1999-12-03 | 2006-09-19 | Nortel Networks Limited | Performing power control in a mobile communications system |
US6351499B1 (en) | 1999-12-15 | 2002-02-26 | Iospan Wireless, Inc. | Method and wireless systems using multiple antennas and adaptive control for maximizing a communication parameter |
US6298092B1 (en) | 1999-12-15 | 2001-10-02 | Iospan Wireless, Inc. | Methods of controlling communication parameters of wireless systems |
EP1109326A1 (en) | 1999-12-15 | 2001-06-20 | Lucent Technologies Inc. | Peamble detector for a CDMA receiver |
JP3975629B2 (ja) * | 1999-12-16 | 2007-09-12 | ソニー株式会社 | 画像復号装置及び画像復号方法 |
US6298035B1 (en) | 1999-12-21 | 2001-10-02 | Nokia Networks Oy | Estimation of two propagation channels in OFDM |
JP2001186051A (ja) | 1999-12-24 | 2001-07-06 | Toshiba Corp | データ信号判定回路及び方法 |
AU755728B2 (en) | 1999-12-28 | 2002-12-19 | Ntt Docomo, Inc. | Path search method, channel estimating method and communications device |
US6718160B2 (en) | 1999-12-29 | 2004-04-06 | Airnet Communications Corp. | Automatic configuration of backhaul and groundlink frequencies in a wireless repeater |
US6888809B1 (en) | 2000-01-13 | 2005-05-03 | Lucent Technologies Inc. | Space-time processing for multiple-input, multiple-output, wireless systems |
US7254171B2 (en) | 2000-01-20 | 2007-08-07 | Nortel Networks Limited | Equaliser for digital communications systems and method of equalisation |
JP3581072B2 (ja) * | 2000-01-24 | 2004-10-27 | 株式会社エヌ・ティ・ティ・ドコモ | チャネル構成方法及びその方法を利用する基地局 |
KR100325367B1 (ko) * | 2000-01-28 | 2002-03-04 | 박태진 | 직교 주파수 분할 다중 통신 시스템에서의 비트 오율 측정장치및 방법 |
JP2001217896A (ja) | 2000-01-31 | 2001-08-10 | Matsushita Electric Works Ltd | 無線データ通信システム |
US7003044B2 (en) * | 2000-02-01 | 2006-02-21 | Sasken Communication Technologies Ltd. | Method for allocating bits and power in multi-carrier communication system |
FI117465B (fi) | 2000-02-03 | 2006-10-31 | Danisco Sweeteners Oy | Menetelmä pureskeltavien ytimien kovapinnoittamiseksi |
US6868120B2 (en) * | 2000-02-08 | 2005-03-15 | Clearwire Corporation | Real-time system for measuring the Ricean K-factor |
US6704374B1 (en) | 2000-02-16 | 2004-03-09 | Thomson Licensing S.A. | Local oscillator frequency correction in an orthogonal frequency division multiplexing system |
DE10008653A1 (de) | 2000-02-24 | 2001-09-06 | Siemens Ag | Verbesserungen an einem Funkkommunikationssystem |
US6956814B1 (en) | 2000-02-29 | 2005-10-18 | Worldspace Corporation | Method and apparatus for mobile platform reception and synchronization in direct digital satellite broadcast system |
JP2001244879A (ja) | 2000-03-02 | 2001-09-07 | Matsushita Electric Ind Co Ltd | 送信電力制御装置及びその方法 |
US6963546B2 (en) | 2000-03-15 | 2005-11-08 | Interdigital Technology Corp. | Multi-user detection using an adaptive combination of joint detection and successive interface cancellation |
EP1137217A1 (en) | 2000-03-20 | 2001-09-26 | Telefonaktiebolaget Lm Ericsson | ARQ parameter negociation in a data packet transmission system using link adaptation |
US7149253B2 (en) * | 2000-03-21 | 2006-12-12 | Texas Instruments Incorporated | Wireless communication |
US6952454B1 (en) | 2000-03-22 | 2005-10-04 | Qualcomm, Incorporated | Multiplexing of real time services and non-real time services for OFDM systems |
US20020154705A1 (en) | 2000-03-22 | 2002-10-24 | Walton Jay R. | High efficiency high performance communications system employing multi-carrier modulation |
US6473467B1 (en) | 2000-03-22 | 2002-10-29 | Qualcomm Incorporated | Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system |
DE10014676C2 (de) | 2000-03-24 | 2002-02-07 | Polytrax Inf Technology Ag | Datenübertragung über ein Stromversorgungsnetz |
US7113499B2 (en) | 2000-03-29 | 2006-09-26 | Texas Instruments Incorporated | Wireless communication |
DE60035335T2 (de) | 2000-04-04 | 2008-03-13 | Sony Deutschland Gmbh | Ereignisgesteuerte Änderung der Zugriffsdienstklasse in einem Zufallzugriffskanal |
DE60021772T2 (de) | 2000-04-07 | 2006-04-20 | Nokia Corp. | Verfahren und vorrichtung zur übertragung mit mehreren antennen |
US7289570B2 (en) | 2000-04-10 | 2007-10-30 | Texas Instruments Incorporated | Wireless communications |
US6757263B1 (en) | 2000-04-13 | 2004-06-29 | Motorola, Inc. | Wireless repeating subscriber units |
ATE513401T1 (de) * | 2000-04-18 | 2011-07-15 | Aware Inc | Mehrträgersystem mit einer mehrzahl von snr- abständen |
US6751199B1 (en) | 2000-04-24 | 2004-06-15 | Qualcomm Incorporated | Method and apparatus for a rate control in a high data rate communication system |
JP3414357B2 (ja) | 2000-04-25 | 2003-06-09 | 日本電気株式会社 | Cdma移動通信システムにおける送信電力制御方式 |
EP1455493B1 (en) * | 2000-04-25 | 2005-11-30 | Nortel Networks Limited | Radio telecommunications system with reduced delays for data transmission |
US7068628B2 (en) | 2000-05-22 | 2006-06-27 | At&T Corp. | MIMO OFDM system |
US7139324B1 (en) | 2000-06-02 | 2006-11-21 | Nokia Networks Oy | Closed loop feedback system for improved down link performance |
WO2001097411A1 (en) | 2000-06-12 | 2001-12-20 | Samsung Electronics Co., Ltd | Method of assigning an uplink random access channel in a cdma mobile communication system |
US6744811B1 (en) | 2000-06-12 | 2004-06-01 | Actelis Networks Inc. | Bandwidth management for DSL modem pool |
US7248841B2 (en) | 2000-06-13 | 2007-07-24 | Agee Brian G | Method and apparatus for optimization of wireless multipoint electromagnetic communication networks |
US6628702B1 (en) | 2000-06-14 | 2003-09-30 | Qualcomm, Incorporated | Method and apparatus for demodulating signals processed in a transmit diversity mode |
US6760313B1 (en) | 2000-06-19 | 2004-07-06 | Qualcomm Incorporated | Method and apparatus for adaptive rate selection in a communication system |
SE519303C2 (sv) | 2000-06-20 | 2003-02-11 | Ericsson Telefon Ab L M | Anordning för smalbandig kommunikation i ett multicarrier- system |
US6891858B1 (en) | 2000-06-30 | 2005-05-10 | Cisco Technology Inc. | Dynamic modulation of modulation profiles for communication channels in an access network |
WO2002003557A1 (en) | 2000-06-30 | 2002-01-10 | Iospan Wireless, Inc. | Method and system for mode adaptation in wireless communication |
CN1140147C (zh) * | 2000-07-01 | 2004-02-25 | 信息产业部电信传输研究所 | 一种外环功率控制的方法和系统 |
WO2002003573A1 (fr) * | 2000-07-03 | 2002-01-10 | Matsushita Electric Industrial Co., Ltd. | Unite de station de base et procede de radiocommunication |
KR100627188B1 (ko) | 2000-07-04 | 2006-09-22 | 에스케이 텔레콤주식회사 | 무선통신 역방향 동기 방식에서의 코드 할당 방법 |
EP2262151B1 (en) | 2000-07-05 | 2017-10-04 | Sony Deutschland Gmbh | Pilot pattern design for multiple antennas in an OFDM system |
CN1448015B (zh) | 2000-07-12 | 2010-05-12 | 高通股份有限公司 | Ofdm系统的实时服务和非实时服务的多路复用 |
FI109393B (fi) | 2000-07-14 | 2002-07-15 | Nokia Corp | Menetelmä mediavirran enkoodaamiseksi skaalautuvasti, skaalautuva enkooderi ja päätelaite |
WO2002007327A1 (en) | 2000-07-17 | 2002-01-24 | Koninklijke Philips Electronics N.V. | Coding of data stream |
KR100493152B1 (ko) | 2000-07-21 | 2005-06-02 | 삼성전자주식회사 | 이동 통신 시스템에서의 전송 안테나 다이버시티 방법 및이를 위한 기지국 장치 및 이동국 장치 |
EP1176750A1 (en) * | 2000-07-25 | 2002-01-30 | Telefonaktiebolaget L M Ericsson (Publ) | Link quality determination of a transmission link in an OFDM transmission system |
EP1178641B1 (en) | 2000-08-01 | 2007-07-25 | Sony Deutschland GmbH | Frequency reuse scheme for OFDM systems |
ATE446663T1 (de) | 2000-08-03 | 2009-11-15 | Infineon Technologies Ag | Dynamisch, rekonfigurierbares, universelles sendersystem |
US6920192B1 (en) * | 2000-08-03 | 2005-07-19 | Lucent Technologies Inc. | Adaptive antenna array methods and apparatus for use in a multi-access wireless communication system |
US6582088B2 (en) * | 2000-08-10 | 2003-06-24 | Benq Corporation | Optical path folding apparatus |
DE60037465T2 (de) | 2000-08-10 | 2008-12-04 | Fujitsu Ltd., Kawasaki | Vorrichtung zur Kommunikation mit Diversität |
KR100526499B1 (ko) * | 2000-08-22 | 2005-11-08 | 삼성전자주식회사 | 두 개 이상 안테나를 사용하는 안테나 전송 다이버시티방법 및 장치 |
EP1182799A3 (en) | 2000-08-22 | 2002-06-26 | Lucent Technologies Inc. | Method for enhancing mobile cdma communications using space-time transmit diversity |
JP3886709B2 (ja) | 2000-08-29 | 2007-02-28 | 三菱電機株式会社 | スペクトル拡散受信装置 |
IT1318790B1 (it) | 2000-08-29 | 2003-09-10 | Cit Alcatel | Metodo per gestire il cambio di allocazione dei time-slot in reti adanello ms-spring di tipo transoceanico. |
US6985434B2 (en) | 2000-09-01 | 2006-01-10 | Nortel Networks Limited | Adaptive time diversity and spatial diversity for OFDM |
US6937592B1 (en) | 2000-09-01 | 2005-08-30 | Intel Corporation | Wireless communications system that supports multiple modes of operation |
US6850481B2 (en) | 2000-09-01 | 2005-02-01 | Nortel Networks Limited | Channels estimation for multiple input—multiple output, orthogonal frequency division multiplexing (OFDM) system |
US7009931B2 (en) * | 2000-09-01 | 2006-03-07 | Nortel Networks Limited | Synchronization in a multiple-input/multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system for wireless applications |
JP2002077098A (ja) | 2000-09-01 | 2002-03-15 | Mitsubishi Electric Corp | 通信装置および通信方法 |
US7233625B2 (en) | 2000-09-01 | 2007-06-19 | Nortel Networks Limited | Preamble design for multiple input—multiple output (MIMO), orthogonal frequency division multiplexing (OFDM) system |
FR2814014B1 (fr) | 2000-09-14 | 2002-10-11 | Mitsubishi Electric Inf Tech | Methode de detection multi-utilisateur |
US6802035B2 (en) | 2000-09-19 | 2004-10-05 | Intel Corporation | System and method of dynamically optimizing a transmission mode of wirelessly transmitted information |
US6760882B1 (en) | 2000-09-19 | 2004-07-06 | Intel Corporation | Mode selection for data transmission in wireless communication channels based on statistical parameters |
US7062294B1 (en) | 2000-09-29 | 2006-06-13 | Arraycomm, Llc. | Downlink transmission in a wireless data communication system having a base station with a smart antenna system |
US6650714B2 (en) | 2000-11-30 | 2003-11-18 | Arraycomm, Inc. | Spatial processing and timing estimation using a training sequence in a radio communications system |
US7110378B2 (en) | 2000-10-03 | 2006-09-19 | Wisconsin Alumni Research Foundation | Channel aware optimal space-time signaling for wireless communication over wideband multipath channels |
US7016296B2 (en) | 2000-10-16 | 2006-03-21 | Broadcom Corporation | Adaptive modulation for fixed wireless link in cable transmission system |
US6907270B1 (en) | 2000-10-23 | 2005-06-14 | Qualcomm Inc. | Method and apparatus for reduced rank channel estimation in a communications system |
US6369758B1 (en) | 2000-11-01 | 2002-04-09 | Unique Broadband Systems, Inc. | Adaptive antenna array for mobile communication |
JP3553038B2 (ja) | 2000-11-06 | 2004-08-11 | 株式会社エヌ・ティ・ティ・ドコモ | 信号送信方法、信号受信方法、送信装置、受信装置および記録媒体 |
US6768727B1 (en) | 2000-11-09 | 2004-07-27 | Ericsson Inc. | Fast forward link power control for CDMA system |
FR2816796A1 (fr) * | 2000-11-14 | 2002-05-17 | Koninkl Philips Electronics Nv | Appareil telephonique comprenant un ecran de visualisation sur lequel apparaissent des parametres de reglage |
US8634481B1 (en) | 2000-11-16 | 2014-01-21 | Alcatel Lucent | Feedback technique for wireless systems with multiple transmit and receive antennas |
US7006464B1 (en) | 2000-11-17 | 2006-02-28 | Lucent Technologies Inc. | Downlink and uplink channel structures for downlink shared channel system |
US6980601B2 (en) | 2000-11-17 | 2005-12-27 | Broadcom Corporation | Rate adaptation and parameter optimization for multi-band single carrier transmission |
JP3695316B2 (ja) | 2000-11-24 | 2005-09-14 | 株式会社日本自動車部品総合研究所 | スペクトラム拡散受信機の相関検出器 |
US6751480B2 (en) | 2000-12-01 | 2004-06-15 | Lucent Technologies Inc. | Method for simultaneously conveying information to multiple mobiles with multiple antennas |
JP4505677B2 (ja) | 2000-12-06 | 2010-07-21 | ソフトバンクテレコム株式会社 | 送信ダイバーシチ装置および送信電力調整方法 |
US6952426B2 (en) | 2000-12-07 | 2005-10-04 | Nortel Networks Limited | Method and apparatus for the transmission of short data bursts in CDMA/HDR networks |
KR100353641B1 (ko) | 2000-12-21 | 2002-09-28 | 삼성전자 주식회사 | 부호분할다중접속 이동통신시스템의 기지국 전송 안테나다이버시티 장치 및 방법 |
US6850498B2 (en) * | 2000-12-22 | 2005-02-01 | Intel Corporation | Method and system for evaluating a wireless link |
US7050510B2 (en) | 2000-12-29 | 2006-05-23 | Lucent Technologies Inc. | Open-loop diversity technique for systems employing four transmitter antennas |
GB0031841D0 (en) * | 2000-12-29 | 2001-02-14 | Nokia Networks Oy | Interference power estimation for adaptive antenna system |
US20020085641A1 (en) | 2000-12-29 | 2002-07-04 | Motorola, Inc | Method and system for interference averaging in a wireless communication system |
US6987819B2 (en) * | 2000-12-29 | 2006-01-17 | Motorola, Inc. | Method and device for multiple input/multiple output transmit and receive weights for equal-rate data streams |
US6731668B2 (en) | 2001-01-05 | 2004-05-04 | Qualcomm Incorporated | Method and system for increased bandwidth efficiency in multiple input—multiple output channels |
EP1223776A1 (en) * | 2001-01-12 | 2002-07-17 | Siemens Information and Communication Networks S.p.A. | A collision free access scheduling in cellular TDMA-CDMA networks |
US6693992B2 (en) * | 2001-01-16 | 2004-02-17 | Mindspeed Technologies | Line probe signal and method of use |
US6801790B2 (en) | 2001-01-17 | 2004-10-05 | Lucent Technologies Inc. | Structure for multiple antenna configurations |
US7164669B2 (en) | 2001-01-19 | 2007-01-16 | Adaptix, Inc. | Multi-carrier communication with time division multiplexing and carrier-selective loading |
US7054662B2 (en) | 2001-01-24 | 2006-05-30 | Qualcomm, Inc. | Method and system for forward link beam forming in wireless communications |
JP2002232943A (ja) | 2001-01-29 | 2002-08-16 | Sony Corp | データ送信処理方法、データ受信処理方法、送信機、受信機、およびセルラー無線通信システム |
GB0102316D0 (en) * | 2001-01-30 | 2001-03-14 | Koninkl Philips Electronics Nv | Radio communication system |
US6961388B2 (en) | 2001-02-01 | 2005-11-01 | Qualcomm, Incorporated | Coding scheme for a wireless communication system |
US6885654B2 (en) | 2001-02-06 | 2005-04-26 | Interdigital Technology Corporation | Low complexity data detection using fast fourier transform of channel correlation matrix |
US7120134B2 (en) | 2001-02-15 | 2006-10-10 | Qualcomm, Incorporated | Reverse link channel architecture for a wireless communication system |
US6975868B2 (en) | 2001-02-21 | 2005-12-13 | Qualcomm Incorporated | Method and apparatus for IS-95B reverse link supplemental code channel frame validation and fundamental code channel rate decision improvement |
US7006483B2 (en) * | 2001-02-23 | 2006-02-28 | Ipr Licensing, Inc. | Qualifying available reverse link coding rates from access channel power setting |
WO2002069523A1 (en) | 2001-02-26 | 2002-09-06 | Magnolia Broadband, Inc | Smart antenna based spectrum multiplexing using a pilot signal |
GB0105019D0 (en) | 2001-03-01 | 2001-04-18 | Koninkl Philips Electronics Nv | Antenna diversity in a wireless local area network |
US7039125B2 (en) | 2001-03-12 | 2006-05-02 | Analog Devices, Inc. | Equalized SNR power back-off |
EP1241824A1 (en) * | 2001-03-14 | 2002-09-18 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Multiplexing method in a multicarrier transmit diversity system |
US6763244B2 (en) | 2001-03-15 | 2004-07-13 | Qualcomm Incorporated | Method and apparatus for adjusting power control setpoint in a wireless communication system |
US6478422B1 (en) | 2001-03-19 | 2002-11-12 | Richard A. Hansen | Single bifocal custom shooters glasses |
US7046746B1 (en) | 2001-03-19 | 2006-05-16 | Cisco Systems Wireless Networking (Australia) Pty Limited | Adaptive Viterbi decoder for a wireless data network receiver |
US7248638B1 (en) | 2001-03-23 | 2007-07-24 | Lsi Logic | Transmit antenna multi-mode tracking |
US6771706B2 (en) * | 2001-03-23 | 2004-08-03 | Qualcomm Incorporated | Method and apparatus for utilizing channel state information in a wireless communication system |
US7386076B2 (en) | 2001-03-29 | 2008-06-10 | Texas Instruments Incorporated | Space time encoded wireless communication system with multipath resolution receivers |
US8290098B2 (en) | 2001-03-30 | 2012-10-16 | Texas Instruments Incorporated | Closed loop multiple transmit, multiple receive antenna wireless communication system |
GB2373973B (en) | 2001-03-30 | 2003-06-11 | Toshiba Res Europ Ltd | Adaptive antenna |
US20020176485A1 (en) * | 2001-04-03 | 2002-11-28 | Hudson John E. | Multi-cast communication system and method of estimating channel impulse responses therein |
US6785513B1 (en) | 2001-04-05 | 2004-08-31 | Cowave Networks, Inc. | Method and system for clustered wireless networks |
US6859503B2 (en) * | 2001-04-07 | 2005-02-22 | Motorola, Inc. | Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel |
KR100510434B1 (ko) | 2001-04-09 | 2005-08-26 | 니폰덴신뎅와 가부시키가이샤 | Ofdm신호전달 시스템, ofdm신호 송신장치 및ofdm신호 수신장치 |
FR2823620B1 (fr) | 2001-04-12 | 2003-08-15 | France Telecom | Procede de codage/decodage d'un flux de donnees numeriques codees avec entrelacement sur bits en emission et en reception multiple en presence d'interference intersymboles et systeme correspondant |
US7310304B2 (en) | 2001-04-24 | 2007-12-18 | Bae Systems Information And Electronic Systems Integration Inc. | Estimating channel parameters in multi-input, multi-output (MIMO) systems |
GB0110223D0 (en) | 2001-04-26 | 2001-06-20 | Sensor Highway Ltd | Method and apparatus for leak detection and location |
FI20010874A (fi) | 2001-04-26 | 2002-10-27 | Nokia Corp | Tiedonsiirtomenetelmä ja -laitteisto |
US6611231B2 (en) | 2001-04-27 | 2003-08-26 | Vivato, Inc. | Wireless packet switched communication systems and networks using adaptively steered antenna arrays |
US7133459B2 (en) * | 2001-05-01 | 2006-11-07 | Texas Instruments Incorporated | Space-time transmit diversity |
EP1255369A1 (en) | 2001-05-04 | 2002-11-06 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Link adaptation for wireless MIMO transmission schemes |
CN100446612C (zh) * | 2001-05-04 | 2008-12-24 | 诺基亚公司 | 借助定向天线的许可控制 |
DE10122788A1 (de) | 2001-05-10 | 2002-06-06 | Basf Ag | Verfahren der kristallisativen Reinigung einer Roh-Schmelze wenigstens eines Monomeren |
US6785341B2 (en) | 2001-05-11 | 2004-08-31 | Qualcomm Incorporated | Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information |
US6751187B2 (en) | 2001-05-17 | 2004-06-15 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel transmission |
US6718493B1 (en) | 2001-05-17 | 2004-04-06 | 3Com Corporation | Method and apparatus for selection of ARQ parameters and estimation of improved communications |
US7688899B2 (en) * | 2001-05-17 | 2010-03-30 | Qualcomm Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
US7072413B2 (en) | 2001-05-17 | 2006-07-04 | Qualcomm, Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
US7492737B1 (en) * | 2001-05-23 | 2009-02-17 | Nortel Networks Limited | Service-driven air interface protocol architecture for wireless systems |
ES2188373B1 (es) | 2001-05-25 | 2004-10-16 | Diseño De Sistemas En Silencio, S.A. | Procedimiento de optimizacion de la comunicacion para sistema de transmision digital ofdm multiusuario sobre red electrica. |
US6920194B2 (en) | 2001-05-29 | 2005-07-19 | Tioga Technologies, Ltd. | Method and system for detecting, timing, and correcting impulse noise |
US7158563B2 (en) * | 2001-06-01 | 2007-01-02 | The Board Of Trustees Of The Leland Stanford Junior University | Dynamic digital communication system control |
US20020183010A1 (en) | 2001-06-05 | 2002-12-05 | Catreux Severine E. | Wireless communication systems with adaptive channelization and link adaptation |
GB2376315B (en) | 2001-06-05 | 2003-08-06 | 3Com Corp | Data bus system including posted reads and writes |
US20020193146A1 (en) | 2001-06-06 | 2002-12-19 | Mark Wallace | Method and apparatus for antenna diversity in a wireless communication system |
US7190749B2 (en) | 2001-06-06 | 2007-03-13 | Qualcomm Incorporated | Method and apparatus for canceling pilot interference in a wireless communication system |
EP1265411B1 (en) | 2001-06-08 | 2007-04-18 | Sony Deutschland GmbH | Multicarrier system with adaptive bit-wise interleaving |
US20030012308A1 (en) * | 2001-06-13 | 2003-01-16 | Sampath Hemanth T. | Adaptive channel estimation for wireless systems |
US7027523B2 (en) * | 2001-06-22 | 2006-04-11 | Qualcomm Incorporated | Method and apparatus for transmitting data in a time division duplexed (TDD) communication system |
WO2003010984A1 (en) | 2001-06-27 | 2003-02-06 | Nortel Networks Limited | Communication of control information in wireless communication systems |
US6842460B1 (en) * | 2001-06-27 | 2005-01-11 | Nokia Corporation | Ad hoc network discovery menu |
US6751444B1 (en) | 2001-07-02 | 2004-06-15 | Broadstorm Telecommunications, Inc. | Method and apparatus for adaptive carrier allocation and power control in multi-carrier communication systems |
FR2827731B1 (fr) | 2001-07-23 | 2004-01-23 | Nexo | Haut-parleur a radiation directe et rayonnement optimise |
US6996380B2 (en) * | 2001-07-26 | 2006-02-07 | Ericsson Inc. | Communication system employing transmit macro-diversity |
US6738020B1 (en) | 2001-07-31 | 2004-05-18 | Arraycomm, Inc. | Estimation of downlink transmission parameters in a radio communications system with an adaptive antenna array |
EP1284545B1 (en) * | 2001-08-13 | 2008-07-02 | Motorola, Inc. | Transmit diversity wireless communication |
KR100703295B1 (ko) * | 2001-08-18 | 2007-04-03 | 삼성전자주식회사 | 이동통신시스템에서 안테나 어레이를 이용한 데이터 송/수신 장치 및 방법 |
US20030039317A1 (en) * | 2001-08-21 | 2003-02-27 | Taylor Douglas Hamilton | Method and apparatus for constructing a sub-carrier map |
FR2828981B1 (fr) | 2001-08-23 | 2004-05-21 | Commissariat Energie Atomique | Creuset a chauffage par induction et refroidissement par caloducs |
EP1289328A1 (en) * | 2001-08-28 | 2003-03-05 | Lucent Technologies Inc. | A method of sending control information in a wireless telecommunications network, and corresponding apparatus |
US6990059B1 (en) * | 2001-09-05 | 2006-01-24 | Cisco Technology, Inc. | Interference mitigation in a wireless communication system |
FR2829326A1 (fr) | 2001-09-06 | 2003-03-07 | France Telecom | Procede et systeme de reception iterative sous optimale pour systeme de transmission haut debit cdma |
US7149254B2 (en) | 2001-09-06 | 2006-12-12 | Intel Corporation | Transmit signal preprocessing based on transmit antennae correlations for multiple antennae systems |
US7133070B2 (en) | 2001-09-20 | 2006-11-07 | Eastman Kodak Company | System and method for deciding when to correct image-specific defects based on camera, scene, display and demographic data |
US6788948B2 (en) | 2001-09-28 | 2004-09-07 | Arraycomm, Inc. | Frequency dependent calibration of a wideband radio system using narrowband channels |
US7277679B1 (en) | 2001-09-28 | 2007-10-02 | Arraycomm, Llc | Method and apparatus to provide multiple-mode spatial processing to a terminal unit |
US7024163B1 (en) | 2001-09-28 | 2006-04-04 | Arraycomm Llc | Method and apparatus for adjusting feedback of a remote unit |
US7035359B2 (en) | 2001-10-11 | 2006-04-25 | Telefonaktiebolaget L.M. Ericsson | Methods and apparatus for demodulation of a signal in a signal slot subject to a discontinuous interference signal |
US7548506B2 (en) | 2001-10-17 | 2009-06-16 | Nortel Networks Limited | System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design |
US7773699B2 (en) * | 2001-10-17 | 2010-08-10 | Nortel Networks Limited | Method and apparatus for channel quality measurements |
US7248559B2 (en) * | 2001-10-17 | 2007-07-24 | Nortel Networks Limited | Scattered pilot pattern and channel estimation method for MIMO-OFDM systems |
US7116652B2 (en) | 2001-10-18 | 2006-10-03 | Lucent Technologies Inc. | Rate control technique for layered architectures with multiple transmit and receive antennas |
KR20030032875A (ko) | 2001-10-19 | 2003-04-26 | 삼성전자주식회사 | 멀티캐스트 멀티미디어 방송 서비스를 제공하는 이동 통신시스템에서 순방향 데이터 채널 송신 전력을 제어하는장치 및 방법 |
US7349667B2 (en) | 2001-10-19 | 2008-03-25 | Texas Instruments Incorporated | Simplified noise estimation and/or beamforming for wireless communications |
JP3607238B2 (ja) | 2001-10-22 | 2005-01-05 | 株式会社東芝 | Ofdm信号受信システム |
CN1306722C (zh) | 2001-10-31 | 2007-03-21 | 松下电器产业株式会社 | 无线发射装置和无线通信方法 |
US7218684B2 (en) | 2001-11-02 | 2007-05-15 | Interdigital Technology Corporation | Method and system for code reuse and capacity enhancement using null steering |
US7164649B2 (en) | 2001-11-02 | 2007-01-16 | Qualcomm, Incorporated | Adaptive rate control for OFDM communication system |
US20030125040A1 (en) | 2001-11-06 | 2003-07-03 | Walton Jay R. | Multiple-access multiple-input multiple-output (MIMO) communication system |
US8018903B2 (en) | 2001-11-21 | 2011-09-13 | Texas Instruments Incorporated | Closed-loop transmit diversity scheme in frequency selective multipath channels |
US7346126B2 (en) | 2001-11-28 | 2008-03-18 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for channel estimation using plural channels |
CN101150556B (zh) | 2001-11-28 | 2015-11-25 | 富士通株式会社 | 正交频分复用传输方法、发射设备以及发射系统 |
RU2304352C2 (ru) | 2001-11-29 | 2007-08-10 | Квэлкомм Инкорпорейтед | Способ и устройство для определения логарифмического отношения правдоподобия с предварительным кодированием |
US7263119B1 (en) | 2001-11-29 | 2007-08-28 | Marvell International Ltd. | Decoding method and apparatus |
US7154936B2 (en) | 2001-12-03 | 2006-12-26 | Qualcomm, Incorporated | Iterative detection and decoding for a MIMO-OFDM system |
US6760388B2 (en) | 2001-12-07 | 2004-07-06 | Qualcomm Incorporated | Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems |
US7155171B2 (en) | 2001-12-12 | 2006-12-26 | Saraband Wireless | Vector network analyzer applique for adaptive communications in wireless networks |
US20030112745A1 (en) * | 2001-12-17 | 2003-06-19 | Xiangyang Zhuang | Method and system of operating a coded OFDM communication system |
US7076514B2 (en) | 2001-12-18 | 2006-07-11 | Conexant, Inc. | Method and system for computing pre-equalizer coefficients |
US7099398B1 (en) | 2001-12-18 | 2006-08-29 | Vixs, Inc. | Method and apparatus for establishing non-standard data rates in a wireless communication system |
JP4052835B2 (ja) | 2001-12-28 | 2008-02-27 | 株式会社日立製作所 | 多地点中継を行う無線伝送システム及びそれに使用する無線装置 |
US7573805B2 (en) * | 2001-12-28 | 2009-08-11 | Motorola, Inc. | Data transmission and reception method and apparatus |
CA2366397A1 (en) | 2001-12-31 | 2003-06-30 | Tropic Networks Inc. | An interface for data transfer between integrated circuits |
US7209433B2 (en) | 2002-01-07 | 2007-04-24 | Hitachi, Ltd. | Channel estimation and compensation techniques for use in frequency division multiplexed systems |
US7020110B2 (en) * | 2002-01-08 | 2006-03-28 | Qualcomm Incorporated | Resource allocation for MIMO-OFDM communication systems |
US7020482B2 (en) | 2002-01-23 | 2006-03-28 | Qualcomm Incorporated | Reallocation of excess power for full channel-state information (CSI) multiple-input, multiple-output (MIMO) systems |
US7058116B2 (en) | 2002-01-25 | 2006-06-06 | Intel Corporation | Receiver architecture for CDMA receiver downlink |
KR100547845B1 (ko) | 2002-02-07 | 2006-01-31 | 삼성전자주식회사 | 고속 순방향 패킷 접속 방식을 사용하는 통신 시스템에서서빙 고속 공통 제어 채널 셋 정보를 송수신하는 장치 및방법 |
US7046978B2 (en) | 2002-02-08 | 2006-05-16 | Qualcomm, Inc. | Method and apparatus for transmit pre-correction in wireless communications |
US6980800B2 (en) | 2002-02-12 | 2005-12-27 | Hughes Network Systems | System and method for providing contention channel organization for broadband satellite access in a communications network |
US7292854B2 (en) | 2002-02-15 | 2007-11-06 | Lucent Technologies Inc. | Express signaling in a wireless communication system |
US7076263B2 (en) | 2002-02-19 | 2006-07-11 | Qualcomm, Incorporated | Power control for partial channel-state information (CSI) multiple-input, multiple-output (MIMO) systems |
US20030162519A1 (en) | 2002-02-26 | 2003-08-28 | Martin Smith | Radio communications device |
US6862271B2 (en) | 2002-02-26 | 2005-03-01 | Qualcomm Incorporated | Multiple-input, multiple-output (MIMO) systems with multiple transmission modes |
US6959171B2 (en) | 2002-02-28 | 2005-10-25 | Intel Corporation | Data transmission rate control |
US6873651B2 (en) * | 2002-03-01 | 2005-03-29 | Cognio, Inc. | System and method for joint maximal ratio combining using time-domain signal processing |
US6687492B1 (en) | 2002-03-01 | 2004-02-03 | Cognio, Inc. | System and method for antenna diversity using joint maximal ratio combining |
US6636568B2 (en) | 2002-03-01 | 2003-10-21 | Qualcomm | Data transmission with non-uniform distribution of data rates for a multiple-input multiple-output (MIMO) system |
GB2386519B (en) | 2002-03-12 | 2004-05-26 | Toshiba Res Europ Ltd | Adaptive Multicarrier Communication |
US20040047284A1 (en) * | 2002-03-13 | 2004-03-11 | Eidson Donald Brian | Transmit diversity framing structure for multipath channels |
JP3561510B2 (ja) | 2002-03-22 | 2004-09-02 | 松下電器産業株式会社 | 基地局装置及びパケット伝送方法 |
US7042858B1 (en) | 2002-03-22 | 2006-05-09 | Jianglei Ma | Soft handoff for OFDM |
US20040198276A1 (en) | 2002-03-26 | 2004-10-07 | Jose Tellado | Multiple channel wireless receiver |
US7012978B2 (en) * | 2002-03-26 | 2006-03-14 | Intel Corporation | Robust multiple chain receiver |
US7197084B2 (en) * | 2002-03-27 | 2007-03-27 | Qualcomm Incorporated | Precoding for a multipath channel in a MIMO system |
KR100456693B1 (ko) | 2002-03-28 | 2004-11-10 | 삼성전자주식회사 | 다중채널 통신 시스템의 비트 할당을 최적화하여 셋업시간을 최소화하는 방법 |
US20030186650A1 (en) | 2002-03-29 | 2003-10-02 | Jung-Tao Liu | Closed loop multiple antenna system |
US7224704B2 (en) | 2002-04-01 | 2007-05-29 | Texas Instruments Incorporated | Wireless network scheduling data frames including physical layer configuration |
US7099377B2 (en) | 2002-04-03 | 2006-08-29 | Stmicroelectronics N.V. | Method and device for interference cancellation in a CDMA wireless communication system |
US7020226B1 (en) * | 2002-04-04 | 2006-03-28 | Nortel Networks Limited | I/Q distortion compensation for the reception of OFDM signals |
US6850741B2 (en) | 2002-04-04 | 2005-02-01 | Agency For Science, Technology And Research | Method for selecting switched orthogonal beams for downlink diversity transmission |
AU2003218506A1 (en) | 2002-04-05 | 2003-10-27 | Flarion Technologies, Inc. | Phase sequences for timing and access signals |
US7103325B1 (en) | 2002-04-05 | 2006-09-05 | Nortel Networks Limited | Adaptive modulation and coding |
US7623871B2 (en) | 2002-04-24 | 2009-11-24 | Qualcomm Incorporated | Position determination for a wireless terminal in a hybrid position determination system |
US7876726B2 (en) | 2002-04-29 | 2011-01-25 | Texas Instruments Incorporated | Adaptive allocation of communications link channels to I- or Q-subchannel |
US6690660B2 (en) * | 2002-05-22 | 2004-02-10 | Interdigital Technology Corporation | Adaptive algorithm for a Cholesky approximation |
US7327800B2 (en) * | 2002-05-24 | 2008-02-05 | Vecima Networks Inc. | System and method for data detection in wireless communication systems |
US6862440B2 (en) * | 2002-05-29 | 2005-03-01 | Intel Corporation | Method and system for multiple channel wireless transmitter and receiver phase and amplitude calibration |
US7421039B2 (en) | 2002-06-04 | 2008-09-02 | Lucent Technologies Inc. | Method and system employing antenna arrays |
KR100498326B1 (ko) | 2002-06-18 | 2005-07-01 | 엘지전자 주식회사 | 이동통신 단말기의 적응 변조 코딩 장치 및 방법 |
US7184713B2 (en) * | 2002-06-20 | 2007-02-27 | Qualcomm, Incorporated | Rate control for multi-channel communication systems |
US7613248B2 (en) | 2002-06-24 | 2009-11-03 | Qualcomm Incorporated | Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems |
US7359313B2 (en) | 2002-06-24 | 2008-04-15 | Agere Systems Inc. | Space-time bit-interleaved coded modulation for wideband transmission |
US7095709B2 (en) * | 2002-06-24 | 2006-08-22 | Qualcomm, Incorporated | Diversity transmission modes for MIMO OFDM communication systems |
JP4579680B2 (ja) | 2002-06-27 | 2010-11-10 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 通信システムにおけるチャンネル特性の測定 |
US7551546B2 (en) | 2002-06-27 | 2009-06-23 | Nortel Networks Limited | Dual-mode shared OFDM methods/transmitters, receivers and systems |
US7342912B1 (en) * | 2002-06-28 | 2008-03-11 | Arraycomm, Llc. | Selection of user-specific transmission parameters for optimization of transmit performance in wireless communications using a common pilot channel |
US7596134B2 (en) | 2002-07-03 | 2009-09-29 | Freescale Semiconductor, Inc. | Flexible method and apparatus for performing digital modulation and demodulation |
EP1379020A1 (en) | 2002-07-03 | 2004-01-07 | National University Of Singapore | A wireless communication apparatus and method |
US20040017785A1 (en) * | 2002-07-16 | 2004-01-29 | Zelst Allert Van | System for transporting multiple radio frequency signals of a multiple input, multiple output wireless communication system to/from a central processing base station |
US6683916B1 (en) * | 2002-07-17 | 2004-01-27 | Philippe Jean-Marc Sartori | Adaptive modulation/coding and power allocation system |
US6885708B2 (en) | 2002-07-18 | 2005-04-26 | Motorola, Inc. | Training prefix modulation method and receiver |
KR20040011653A (ko) | 2002-07-29 | 2004-02-11 | 삼성전자주식회사 | 채널 특성에 적응적인 직교 주파수 분할 다중 통신 방법및 장치 |
EP1540830B9 (en) * | 2002-07-30 | 2009-09-16 | IPR Licensing Inc. | System and method for multiple-input multiple-output (mimo) radio communication |
US6961595B2 (en) | 2002-08-08 | 2005-11-01 | Flarion Technologies, Inc. | Methods and apparatus for operating mobile nodes in multiple states |
US7653415B2 (en) * | 2002-08-21 | 2010-01-26 | Broadcom Corporation | Method and system for increasing data rate in a mobile terminal using spatial multiplexing for DVB-H communication |
US6970722B1 (en) | 2002-08-22 | 2005-11-29 | Cisco Technology, Inc. | Array beamforming with wide nulls |
DE60325921D1 (de) | 2002-08-22 | 2009-03-12 | Imec Inter Uni Micro Electr | Verfahren zur MIMO-Übertragung für mehrere Benutzer und entsprechende Vorrichtungen |
US20040037257A1 (en) | 2002-08-23 | 2004-02-26 | Koninklijke Philips Electronics N.V. | Method and apparatus for assuring quality of service in wireless local area networks |
US8194770B2 (en) | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
US6940917B2 (en) * | 2002-08-27 | 2005-09-06 | Qualcomm, Incorporated | Beam-steering and beam-forming for wideband MIMO/MISO systems |
WO2004023674A1 (en) | 2002-09-06 | 2004-03-18 | Nokia Corporation | Antenna selection method |
US7260153B2 (en) | 2002-09-09 | 2007-08-21 | Mimopro Ltd. | Multi input multi output wireless communication method and apparatus providing extended range and extended rate across imperfectly estimated channels |
US20040052228A1 (en) * | 2002-09-16 | 2004-03-18 | Jose Tellado | Method and system of frequency and time synchronization of a transceiver to signals received by the transceiver |
US7426176B2 (en) | 2002-09-30 | 2008-09-16 | Lucent Technologies Inc. | Method of power allocation and rate control in OFDMA systems |
US6850511B2 (en) | 2002-10-15 | 2005-02-01 | Intech 21, Inc. | Timely organized ad hoc network and protocol for timely organized ad hoc network |
US7961774B2 (en) | 2002-10-15 | 2011-06-14 | Texas Instruments Incorporated | Multipath interference-resistant receivers for closed-loop transmit diversity (CLTD) in code-division multiple access (CDMA) systems |
US20040121730A1 (en) * | 2002-10-16 | 2004-06-24 | Tamer Kadous | Transmission scheme for multi-carrier MIMO systems |
US7457625B2 (en) | 2002-10-22 | 2008-11-25 | Texas Instruments Incorporated | Wirelessly-linked, distributed resource control to support wireless communication in non-exclusive spectrum |
US7453844B1 (en) | 2002-10-22 | 2008-11-18 | Hong Kong Applied Science and Technology Research Institute, Co., Ltd. | Dynamic allocation of channels in a wireless network |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8208364B2 (en) | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US7986742B2 (en) | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US7324429B2 (en) | 2002-10-25 | 2008-01-29 | Qualcomm, Incorporated | Multi-mode terminal in a wireless MIMO system |
US20040081131A1 (en) | 2002-10-25 | 2004-04-29 | Walton Jay Rod | OFDM communication system with multiple OFDM symbol sizes |
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US7002900B2 (en) * | 2002-10-25 | 2006-02-21 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US7151809B2 (en) | 2002-10-25 | 2006-12-19 | Qualcomm, Incorporated | Channel estimation and spatial processing for TDD MIMO systems |
US8320301B2 (en) | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
MXPA05004311A (es) | 2002-10-25 | 2005-08-03 | Qualcomm Inc | Deteccion y demodulacion de datos para sistemas de comunicaciones inalambricas. |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8218609B2 (en) | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US8170513B2 (en) * | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
WO2004038972A1 (en) | 2002-10-26 | 2004-05-06 | Electronics And Telecommunications Research Institute | Frequency hopping ofdma method using symbols of comb pattern |
US7317750B2 (en) * | 2002-10-31 | 2008-01-08 | Lot 41 Acquisition Foundation, Llc | Orthogonal superposition coding for direct-sequence communications |
EP1416688A1 (en) | 2002-10-31 | 2004-05-06 | Motorola Inc. | Iterative channel estimation in multicarrier receivers |
US7280625B2 (en) | 2002-12-11 | 2007-10-09 | Qualcomm Incorporated | Derivation of eigenvectors for spatial processing in MIMO communication systems |
US7280467B2 (en) | 2003-01-07 | 2007-10-09 | Qualcomm Incorporated | Pilot transmission schemes for wireless multi-carrier communication systems |
US7058367B1 (en) | 2003-01-31 | 2006-06-06 | At&T Corp. | Rate-adaptive methods for communicating over multiple input/multiple output wireless systems |
US7583637B2 (en) | 2003-01-31 | 2009-09-01 | Alcatel-Lucent Usa Inc. | Methods of controlling data rate in wireless communications systems |
US20040176097A1 (en) | 2003-02-06 | 2004-09-09 | Fiona Wilson | Allocation of sub channels of MIMO channels of a wireless network |
EP1447934A1 (en) | 2003-02-12 | 2004-08-18 | Institut Eurecom G.I.E. | Transmission and reception diversity process for wireless communications |
JP2004266586A (ja) | 2003-03-03 | 2004-09-24 | Hitachi Ltd | 移動通信システムのデータ送受信方法 |
JP4250002B2 (ja) | 2003-03-05 | 2009-04-08 | 富士通株式会社 | 適応型変調伝送システム及び適応型変調制御方法 |
US6927728B2 (en) | 2003-03-13 | 2005-08-09 | Motorola, Inc. | Method and apparatus for multi-antenna transmission |
US7822140B2 (en) | 2003-03-17 | 2010-10-26 | Broadcom Corporation | Multi-antenna communication systems utilizing RF-based and baseband signal weighting and combining |
US7885228B2 (en) | 2003-03-20 | 2011-02-08 | Qualcomm Incorporated | Transmission mode selection for data transmission in a multi-channel communication system |
JP4259897B2 (ja) | 2003-03-25 | 2009-04-30 | シャープ株式会社 | 無線データ伝送システム及び無線データ送受信装置 |
US7242727B2 (en) | 2003-03-31 | 2007-07-10 | Lucent Technologies Inc. | Method of determining transmit power for transmit eigenbeams in a multiple-input multiple-output communications system |
JP4390636B2 (ja) | 2003-06-11 | 2009-12-24 | 株式会社エヌ・ティ・ティ・ドコモ | Ofdm信号フレーム生成器、送信機、信号伝送システム及びofdm信号フレーム生成方法 |
US7403503B2 (en) | 2003-07-09 | 2008-07-22 | Interdigital Technology Corporation | Resource allocation in wireless communication systems |
RU2006104121A (ru) | 2003-07-11 | 2006-07-10 | Квэлкомм Инкорпорейтед (US) | Динамический совместно используемый канал прямой линии связи для системы беспроводной связи |
WO2005014820A1 (fr) | 2003-08-08 | 2005-02-17 | Si Chuan Heben Biotic Engineering Co. Ltd. | 5-enolpyruvyl-3-phosphoshikimate synthase a bioresistance eleve au glyphosate et sequence de codage |
US7065144B2 (en) * | 2003-08-27 | 2006-06-20 | Qualcomm Incorporated | Frequency-independent spatial processing for wideband MISO and MIMO systems |
WO2005022833A2 (en) * | 2003-08-27 | 2005-03-10 | Wavion Ltd. | Wlan capacity enhancement using sdm |
US7356089B2 (en) | 2003-09-05 | 2008-04-08 | Nortel Networks Limited | Phase offset spatial multiplexing |
KR100995031B1 (ko) | 2003-10-01 | 2010-11-19 | 엘지전자 주식회사 | 다중입력 다중출력 시스템에 적용되는 신호 전송 제어 방법 |
US8233462B2 (en) | 2003-10-15 | 2012-07-31 | Qualcomm Incorporated | High speed media access control and direct link protocol |
US8483105B2 (en) | 2003-10-15 | 2013-07-09 | Qualcomm Incorporated | High speed media access control |
US8842657B2 (en) | 2003-10-15 | 2014-09-23 | Qualcomm Incorporated | High speed media access control with legacy system interoperability |
US7508748B2 (en) | 2003-10-24 | 2009-03-24 | Qualcomm Incorporated | Rate selection for a multi-carrier MIMO system |
KR100944821B1 (ko) | 2003-10-24 | 2010-03-03 | 콸콤 인코포레이티드 | 무선 멀티-캐리어 통신 시스템에서 다수의 데이터 스트림들의 주파수 분할 멀티플렉싱 |
US7616698B2 (en) | 2003-11-04 | 2009-11-10 | Atheros Communications, Inc. | Multiple-input multiple output system and method |
US7298805B2 (en) | 2003-11-21 | 2007-11-20 | Qualcomm Incorporated | Multi-antenna transmission for spatial division multiple access |
US7532563B1 (en) | 2003-11-25 | 2009-05-12 | Marvell International Ltd. | Mechanism to improve quality of channel estimates in OFDM transmissions |
US9473269B2 (en) | 2003-12-01 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
US7231184B2 (en) | 2003-12-05 | 2007-06-12 | Texas Instruments Incorporated | Low overhead transmit channel estimation |
EP1542488A1 (en) | 2003-12-12 | 2005-06-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
EP1698086A2 (en) | 2003-12-27 | 2006-09-06 | Electronics and Telecommunications Research Institute | A mimo-ofdm system using eigenbeamforming method |
US7333556B2 (en) * | 2004-01-12 | 2008-02-19 | Intel Corporation | System and method for selecting data rates to provide uniform bit loading of subcarriers of a multicarrier communication channel |
JP2005223829A (ja) | 2004-02-09 | 2005-08-18 | Nec Electronics Corp | 分数分周回路及びこれを用いたデータ伝送装置 |
US7206354B2 (en) | 2004-02-19 | 2007-04-17 | Qualcomm Incorporated | Calibration of downlink and uplink channel responses in a wireless MIMO communication system |
US7746886B2 (en) | 2004-02-19 | 2010-06-29 | Broadcom Corporation | Asymmetrical MIMO wireless communications |
US7274734B2 (en) | 2004-02-20 | 2007-09-25 | Aktino, Inc. | Iterative waterfiling with explicit bandwidth constraints |
US7848442B2 (en) | 2004-04-02 | 2010-12-07 | Lg Electronics Inc. | Signal processing apparatus and method in multi-input/multi-output communications systems |
US7486740B2 (en) | 2004-04-02 | 2009-02-03 | Qualcomm Incorporated | Calibration of transmit and receive chains in a MIMO communication system |
US7110463B2 (en) | 2004-06-30 | 2006-09-19 | Qualcomm, Incorporated | Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system |
US7606319B2 (en) | 2004-07-15 | 2009-10-20 | Nokia Corporation | Method and detector for a novel channel quality indicator for space-time encoded MIMO spread spectrum systems in frequency selective channels |
US20060018247A1 (en) * | 2004-07-22 | 2006-01-26 | Bas Driesen | Method and apparatus for space interleaved communication in a multiple antenna communication system |
US7599443B2 (en) | 2004-09-13 | 2009-10-06 | Nokia Corporation | Method and apparatus to balance maximum information rate with quality of service in a MIMO system |
KR100905605B1 (ko) * | 2004-09-24 | 2009-07-02 | 삼성전자주식회사 | 직교주파수분할다중화 다중입출력 통신 시스템의 전송 방법 |
TWI296753B (en) | 2004-10-26 | 2008-05-11 | Via Tech Inc | Usb control circuit for saving power and the method thereof |
EP1829262B1 (en) | 2004-11-16 | 2018-03-14 | QUALCOMM Incorporated | Closed-loop rate control for a mimo communication system |
US8498215B2 (en) | 2004-11-16 | 2013-07-30 | Qualcomm Incorporated | Open-loop rate control for a TDD communication system |
US7525988B2 (en) | 2005-01-17 | 2009-04-28 | Broadcom Corporation | Method and system for rate selection algorithm to maximize throughput in closed loop multiple input multiple output (MIMO) wireless local area network (WLAN) system |
US7466749B2 (en) | 2005-05-12 | 2008-12-16 | Qualcomm Incorporated | Rate selection with margin sharing |
US7603141B2 (en) | 2005-06-02 | 2009-10-13 | Qualcomm, Inc. | Multi-antenna station with distributed antennas |
US8358714B2 (en) | 2005-06-16 | 2013-01-22 | Qualcomm Incorporated | Coding and modulation for multiple data streams in a communication system |
US8543070B2 (en) | 2006-04-24 | 2013-09-24 | Qualcomm Incorporated | Reduced complexity beam-steered MIMO OFDM system |
US20090161613A1 (en) | 2007-11-30 | 2009-06-25 | Mark Kent | Method and system for constructing channel quality indicator tables for feedback in a communication system |
US20090291642A1 (en) | 2008-05-23 | 2009-11-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Systems and Methods for SIR Estimation for Power Control |
US8619620B2 (en) * | 2008-09-16 | 2013-12-31 | Qualcomm Incorporated | Methods and systems for transmission mode selection in a multi channel communication system |
ES2355347B1 (es) | 2009-01-30 | 2012-02-10 | Vodafone España, S.A.U. | Método para detectar interferencias en un sistema de comunicación inal�?mbrico. |
US20100260060A1 (en) | 2009-04-08 | 2010-10-14 | Qualcomm Incorporated | Integrated calibration protocol for wireless lans |
-
2003
- 2003-09-29 US US10/674,038 patent/US7002900B2/en not_active Expired - Lifetime
- 2003-10-27 WO PCT/US2003/033905 patent/WO2004038987A2/en active Application Filing
- 2003-10-27 UA UAA200504964A patent/UA83473C2/uk unknown
- 2003-10-27 BR BRPI0315520A patent/BRPI0315520B1/pt active IP Right Grant
- 2003-10-27 JP JP2005501685A patent/JP4739952B2/ja not_active Expired - Lifetime
- 2003-10-27 MX MXPA05004194A patent/MXPA05004194A/es active IP Right Grant
- 2003-10-27 EP EP03779264.5A patent/EP1556983B1/en not_active Expired - Lifetime
- 2003-10-27 CN CN2003801045546A patent/CN1717889B/zh not_active Expired - Lifetime
- 2003-10-27 TW TW092129817A patent/TWI339057B/zh not_active IP Right Cessation
- 2003-10-27 KR KR1020057006732A patent/KR101073331B1/ko active IP Right Grant
- 2003-10-27 AU AU2003284943A patent/AU2003284943C1/en not_active Expired
- 2003-10-27 CA CA2501449A patent/CA2501449C/en not_active Expired - Lifetime
-
2005
- 2005-03-21 IL IL167572A patent/IL167572A/en active IP Right Grant
- 2005-10-13 US US11/250,353 patent/US8934329B2/en active Active
-
2006
- 2006-04-03 HK HK06104068.3A patent/HK1086123A1/xx not_active IP Right Cessation
-
2009
- 2009-05-05 AU AU2009201783A patent/AU2009201783B2/en not_active Expired
- 2009-06-24 US US12/490,993 patent/US8873365B2/en active Active
-
2010
- 2010-10-01 JP JP2010223417A patent/JP5199324B2/ja not_active Expired - Lifetime
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101039162B (zh) * | 2006-03-17 | 2010-10-06 | 华为技术有限公司 | 多输入多输出系统中确定反馈的方法、装置和系统 |
CN101043297B (zh) * | 2006-03-20 | 2010-08-25 | 华为技术有限公司 | 一种多天线通信中发射信号的方法及系统 |
CN103560993A (zh) * | 2007-10-30 | 2014-02-05 | 索尼株式会社 | 数据处理设备及方法 |
CN103560993B (zh) * | 2007-10-30 | 2017-06-06 | 索尼株式会社 | 数据处理设备及方法 |
US8995420B2 (en) | 2009-04-28 | 2015-03-31 | Alcatel Lucent | Transmitter with multiple antennas and data transmission method in the transmitter with multiple antennas |
CN102334318A (zh) * | 2009-04-28 | 2012-01-25 | 上海贝尔股份有限公司 | 多天线发射机以及用于多天线发射机中的数据发送方法 |
WO2010124414A1 (zh) * | 2009-04-28 | 2010-11-04 | 上海贝尔股份有限公司 | 多天线发射机以及用于多天线发射机中的数据发送方法 |
CN102334318B (zh) * | 2009-04-28 | 2014-02-12 | 上海贝尔股份有限公司 | 多天线发射机以及用于多天线发射机中的数据发送方法 |
US10003432B2 (en) | 2009-07-29 | 2018-06-19 | Marvell World Trade Ltd. | Methods and apparatus for WLAN transmission |
CN104702376A (zh) * | 2009-07-29 | 2015-06-10 | 马维尔国际贸易有限公司 | 用于wlan发送的方法和装置 |
US8824398B2 (en) | 2009-08-12 | 2014-09-02 | Hitachi, Ltd. | Radio communication system, radio communication device, and radio communication method |
CN102474381B (zh) * | 2009-08-12 | 2015-07-22 | 株式会社日立制作所 | 无线通信系统、无线通信装置以及无线通信方法 |
CN102474381A (zh) * | 2009-08-12 | 2012-05-23 | 株式会社日立制作所 | 无线通信系统、无线通信装置以及无线通信方法 |
CN102857464A (zh) * | 2011-08-17 | 2013-01-02 | 北京泰美世纪科技有限公司 | 数字传输系统中扩展信号带宽的方法和装置 |
CN102857464B (zh) * | 2011-08-17 | 2016-03-30 | 北京泰美世纪科技有限公司 | 数字传输系统中扩展信号带宽的方法和装置 |
WO2013023588A1 (zh) * | 2011-08-17 | 2013-02-21 | 北京泰美世纪科技有限公司 | 数字传输系统中扩展信号带宽的方法和装置 |
CN106899393A (zh) * | 2012-05-30 | 2017-06-27 | 想象力科技有限公司 | 噪声方差估计和干扰检测 |
CN106899393B (zh) * | 2012-05-30 | 2020-07-07 | 想象力科技有限公司 | 噪声方差估计和干扰检测 |
WO2017080392A1 (zh) * | 2015-11-13 | 2017-05-18 | 华为技术有限公司 | 数据传输方法和装置 |
US10419262B2 (en) | 2015-11-13 | 2019-09-17 | Huawei Technologies Co., Ltd. | Data transmission method and apparatus |
US10819553B2 (en) | 2015-11-13 | 2020-10-27 | Huawei Technologies Co., Ltd. | Data transmission method and apparatus |
US11140017B2 (en) | 2015-11-13 | 2021-10-05 | Huawei Technologies Co., Ltd. | Data transmission method and apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP1556983B1 (en) | 2013-06-05 |
JP2011030262A (ja) | 2011-02-10 |
CA2501449C (en) | 2012-11-27 |
WO2004038987A3 (en) | 2004-07-15 |
AU2003284943B2 (en) | 2009-02-05 |
US20040081073A1 (en) | 2004-04-29 |
JP5199324B2 (ja) | 2013-05-15 |
EP1556983A2 (en) | 2005-07-27 |
JP4739952B2 (ja) | 2011-08-03 |
BRPI0315520B1 (pt) | 2017-03-07 |
AU2003284943C1 (en) | 2009-07-23 |
IL167572A0 (en) | 2009-02-11 |
CN1717889B (zh) | 2011-05-25 |
WO2004038987A2 (en) | 2004-05-06 |
IL167572A (en) | 2011-03-31 |
KR20050072767A (ko) | 2005-07-12 |
US8873365B2 (en) | 2014-10-28 |
AU2003284943A1 (en) | 2004-05-13 |
CA2501449A1 (en) | 2004-05-06 |
MXPA05004194A (es) | 2005-06-08 |
TW200417214A (en) | 2004-09-01 |
AU2009201783A1 (en) | 2009-05-28 |
US8934329B2 (en) | 2015-01-13 |
TWI339057B (en) | 2011-03-11 |
UA83473C2 (uk) | 2008-07-25 |
AU2009201783B2 (en) | 2011-04-21 |
US20060039275A1 (en) | 2006-02-23 |
HK1086123A1 (en) | 2006-09-08 |
US20100208841A1 (en) | 2010-08-19 |
BR0315520A (pt) | 2005-09-27 |
US7002900B2 (en) | 2006-02-21 |
KR101073331B1 (ko) | 2011-10-12 |
JP2006504366A (ja) | 2006-02-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1717889A (zh) | 多天线通信系统的发送分集处理 | |
CN101390292B (zh) | 用于多播消息的阶层编码 | |
CN101374032B (zh) | 无线通信系统、无线通信设备以及无线通信方法 | |
JP5830158B2 (ja) | 端末装置及び無線通信方法 | |
US8861447B2 (en) | Group identification and definition employing look up table (LUT) within multiple user, multiple access, and/or MIMO wireless communications | |
JP4875088B2 (ja) | 多入力多出力チャンネルのための低密度パリティ検査コード用のコード設計及び構造の改良 | |
CN1498473A (zh) | 多输入一多输出信道中提高带宽效率的方法和系统 | |
CN1663163A (zh) | 数据传输方法和系统 | |
CN102833049A (zh) | 多个空间多路复用模式的mimo系统 | |
CN1498478A (zh) | 无线通信系统的编码方案 | |
US11063689B2 (en) | Apparatus and method for diversity transmission in a wireless communications system | |
CN1871807A (zh) | 用于实现高吞吐量无线通信系统的设备和相关方法 | |
EP2191581A2 (en) | Rate matching to maintain code block resource element boundaries | |
WO2021006809A1 (en) | Communication apparatus and communication method for hybrid automatic repeat request transmission | |
US20230308326A1 (en) | Data transmission for low power indoor wireless network | |
CN101674532B (zh) | 子区块产生方法及其装置以及相关点对多点传输装置 | |
JP2006060383A (ja) | 無線通信システム、無線通信装置及び無線通信方法、並びにコンピュータ・プログラム、並びにコンピュータ・プログラム | |
JP2021083118A (ja) | 受信装置、受信方法および集積回路 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1086123 Country of ref document: HK |
|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1086123 Country of ref document: HK |
|
CX01 | Expiry of patent term |
Granted publication date: 20110525 |
|
CX01 | Expiry of patent term |