CA2001019A1 - Agc isolation of information in tdma systems - Google Patents

Agc isolation of information in tdma systems

Info

Publication number
CA2001019A1
CA2001019A1 CA2001019A CA2001019A CA2001019A1 CA 2001019 A1 CA2001019 A1 CA 2001019A1 CA 2001019 A CA2001019 A CA 2001019A CA 2001019 A CA2001019 A CA 2001019A CA 2001019 A1 CA2001019 A1 CA 2001019A1
Authority
CA
Canada
Prior art keywords
signals
information
interest
receiver
transmission
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
Application number
CA2001019A
Other languages
French (fr)
Other versions
CA2001019C (en
Inventor
Gregory J. Dettro
Gerald Paul Labedz
Frederick Garland Atkinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of CA2001019A1 publication Critical patent/CA2001019A1/en
Application granted granted Critical
Publication of CA2001019C publication Critical patent/CA2001019C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3078—Circuits generating control signals for digitally modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/10—Arrangements for reducing cross-talk between channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Transmitters (AREA)

Abstract

A method is provided for isolating and processing certain information-of-interest received by a receiver in a Time Division Multiple Access (TDMA) communications system having a receiver and a transmitter. The information-of-interest is transmitted at predetermined intervals. The receiver receives a transmission of signals containing the information-of-interest transmitted from the transmitter. The start of the transmission is sensed from the received signals. The receiver isolates signals received after a predetermined period elapses after the start of the transmission is sensed so as to include the information-of-interest in the isolated signals. Then, the isolated signals including the information-of-interest are processed. In the preferred embodiment, the receiver automatically controls the gain of an amplifier amplifying the received signals in response to the signal power of the received signals. Automatic gain control values of the amplifier are sampled for a predetermined period after the start of the transmission is sensed. A fixed automatic gain control value is determined in response to the sampled automatic gain control values, and the receiver holes the automatic gain control value at the fixed value after the predetermined period elapses until the transmission ofthe information-of-interest ends. Furthermore, the receiver digitizes the received signals, and tags the digitized signals which were digitized from signals received before the start of the transmission is sensed to ignore the tagged signals in processing the information-of-interest.
CA002001019A 1988-11-30 1989-10-19 Agc isolation of information in tdma systems Expired - Fee Related CA2001019C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/277,724 US5638375A (en) 1988-11-30 1988-11-30 AGC isolation of information in TDMA systems
US277,724 1988-11-30

Publications (2)

Publication Number Publication Date
CA2001019A1 true CA2001019A1 (en) 1990-05-31
CA2001019C CA2001019C (en) 1997-04-22

Family

ID=23062099

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002001019A Expired - Fee Related CA2001019C (en) 1988-11-30 1989-10-19 Agc isolation of information in tdma systems

Country Status (15)

Country Link
US (1) US5638375A (en)
EP (1) EP0372759B1 (en)
JP (1) JPH04503438A (en)
KR (1) KR930008701B1 (en)
AT (1) ATE124581T1 (en)
CA (1) CA2001019C (en)
DE (1) DE68923257T2 (en)
DK (1) DK101791A (en)
ES (1) ES2073445T3 (en)
IE (1) IE71165B1 (en)
IL (1) IL92001A (en)
MX (1) MX172192B (en)
PT (1) PT92432B (en)
TR (1) TR25684A (en)
WO (1) WO1990006641A1 (en)

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GB2247793A (en) * 1990-09-06 1992-03-11 Motorola Inc Control of pulse power amplifier rise and fall
KR970000793B1 (en) * 1991-01-16 1997-01-20 모토로라 인코포레이티드 Amplitude control of a burst signal in a receiver
US5369786A (en) * 1991-05-01 1994-11-29 Motorola, Inc. Enhanced power level usage in a radiotelephone system
FR2694853A1 (en) * 1992-08-14 1994-02-18 Trt Telecom Radio Electr An information transmission system comprising at least one base station and one satellite station and station forming part of such a system.
EP0631382B1 (en) * 1993-06-25 2001-05-09 Siemens Aktiengesellschaft Method for optimising the automatic adjustment of an amplifier in an rf-receiver
FI97765C (en) * 1993-11-26 1997-02-10 Nokia Mobile Phones Ltd A method and a switching arrangement for processing paging messages in a mobile station
US5493712A (en) * 1994-03-23 1996-02-20 At&T Corp. Fast AGC for TDMA radio systems
DE4410174A1 (en) * 1994-03-24 1995-09-28 Sel Alcatel Ag Hand-held mobile radio telephone
CA2206624A1 (en) * 1996-06-10 1997-12-10 Krzysztof Duch Method of establishing a spatially normalized communication path in a networked communications system
US7035661B1 (en) 1996-10-11 2006-04-25 Arraycomm, Llc. Power control with signal quality estimation for smart antenna communication systems
US6463295B1 (en) 1996-10-11 2002-10-08 Arraycomm, Inc. Power control with signal quality estimation for smart antenna communication systems
US5930243A (en) * 1996-10-11 1999-07-27 Arraycomm, Inc. Method and apparatus for estimating parameters of a communication system using antenna arrays and spatial processing
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
US7299071B1 (en) 1997-12-10 2007-11-20 Arraycomm, Llc Downlink broadcasting by sequential transmissions from a communication station having an antenna array
DE19805547C1 (en) * 1998-02-11 1999-09-09 Siemens Ag Digital radio receiver for mobile radio
US8538322B1 (en) * 1998-02-23 2013-09-17 Qualcomm Incorporated Transmit and admission control for CDMA satellite communication system
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
US20020167918A1 (en) * 1998-12-24 2002-11-14 Brewer Charles R. Real-time satellite communication system using separate control and data transmission paths
US6208626B1 (en) 1998-12-24 2001-03-27 Charles R. Brewer Real-time satellite communication system using separate control and data transmission paths
US6600914B2 (en) 1999-05-24 2003-07-29 Arraycomm, Inc. System and method for emergency call channel allocation
US6141567A (en) 1999-06-07 2000-10-31 Arraycomm, Inc. Apparatus and method for beamforming in a changing-interference environment
US7139592B2 (en) * 1999-06-21 2006-11-21 Arraycomm Llc Null deepening for an adaptive antenna based communication station
US6985466B1 (en) 1999-11-09 2006-01-10 Arraycomm, Inc. Downlink signal processing in CDMA systems utilizing arrays of antennae
US7065164B1 (en) * 2000-07-17 2006-06-20 Mitsubishi Denki Kabushiki Kaisha Automatic gain control and wireless communication device
US6795409B1 (en) 2000-09-29 2004-09-21 Arraycomm, Inc. Cooperative polling in a wireless data communication system having smart antenna processing
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
US6982968B1 (en) 2000-09-29 2006-01-03 Arraycomm, Inc. Non-directional transmitting from a wireless data base station having a smart antenna system
US7085255B2 (en) * 2000-10-19 2006-08-01 Interdigital Technology Corporation Selectively activated AGC signal measurement unit
EP1458117B1 (en) * 2000-10-19 2006-07-05 Interdigital Technology Corporation TDD receiver with selectively activated agc signal measurement unit
US7151759B1 (en) * 2001-03-19 2006-12-19 Cisco Systems Wireless Networking (Australia) Pty Limited Automatic gain control and low power start-of-packet detection for a wireless LAN receiver
US6934327B1 (en) * 2001-04-23 2005-08-23 Rockwell Collins Acquisition of a continuous-phase modulation waveform
KR100770231B1 (en) * 2001-10-16 2007-10-26 텔레폰악티에볼라겟 엘엠 에릭슨(펍) Synchronisation of mobile equipment in time division duplex ???? system
KR100524730B1 (en) * 2002-11-02 2005-10-31 엘지전자 주식회사 Early syncrounization search method for mobile communication system
JP2010130118A (en) * 2008-11-25 2010-06-10 Sony Corp Transmitter apparatus, receiver apparatus, communication system and processing method for use in receiver apparatus
US20120287917A1 (en) * 2009-09-18 2012-11-15 Qualcomm Incorporated Common Channel Configuration to Facilitate Measurement for Handover in TD-SCDMA Systems
US11025217B2 (en) 2018-02-13 2021-06-01 Abb Power Grids Switzerland Ag Fast automatic gain control for high performance wireless communications in substation automation

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US3746993A (en) * 1971-12-27 1973-07-17 Ncr Carrier detection circuit
DE3069679D1 (en) * 1980-12-08 1985-01-03 Ibm Method of transmitting information between stations attached to a unidirectional transmission ring
US4500987A (en) * 1981-11-24 1985-02-19 Nippon Electric Co., Ltd. Loop transmission system
FR2520952A1 (en) * 1982-02-03 1983-08-05 Trt Telecom Radio Electr AUTOMATIC GAIN CONTROL DEVICE (AGC) WITH QUICK ACTION
JPS59246A (en) * 1982-06-17 1984-01-05 Fujitsu Ltd Training system
GB2125653B (en) * 1982-08-04 1986-08-13 Plessey Co Plc Improved time slot arrangements for local area network systems
US4554508A (en) * 1983-12-07 1985-11-19 American Microsystems, Incorporated Carrier detection circuit
US4630267A (en) * 1983-12-23 1986-12-16 International Business Machines Corporation Programmable timing and synchronization circuit for a TDMA communications controller
US4625240A (en) * 1984-07-25 1986-11-25 Eeco, Inc. Adaptive automatic gain control
JPS6173416A (en) * 1984-09-19 1986-04-15 Nec Corp Automatic frequency/gain control circuit
JPS61105143A (en) * 1984-10-29 1986-05-23 Nec Corp Burst signal detector
FR2576472B1 (en) * 1985-01-22 1988-02-12 Alcatel Thomson Faisceaux METHOD AND DEVICE FOR AUTOMATICALLY GAIN CONTROL OF A TIME-DIVISION MULTIPLE ACCESS RECEIVER
JPS61170150A (en) * 1985-01-24 1986-07-31 Nec Corp Slave station controller of reference station in time division multiple address system
CA1259430A (en) * 1985-07-19 1989-09-12 Fumio Akashi Multipoint communication system having polling and reservation schemes
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US4852090A (en) * 1987-02-02 1989-07-25 Motorola, Inc. TDMA communications system with adaptive equalization
US4979170A (en) * 1988-01-19 1990-12-18 Qualcomm, Inc. Alternating sequential half duplex communication system
CA1288878C (en) * 1988-08-15 1991-09-10 John D. Mcnicol Timing and carrier recovery in tdma without preamable sequence

Also Published As

Publication number Publication date
KR930008701B1 (en) 1993-09-13
IL92001A (en) 1994-02-27
ATE124581T1 (en) 1995-07-15
EP0372759A2 (en) 1990-06-13
JPH04503438A (en) 1992-06-18
PT92432B (en) 1994-02-28
CA2001019C (en) 1997-04-22
DE68923257D1 (en) 1995-08-03
IE893304L (en) 1990-05-30
KR900702680A (en) 1990-12-08
DK101791A (en) 1991-06-25
DE68923257T2 (en) 1996-02-15
MX172192B (en) 1993-12-07
DK101791D0 (en) 1991-05-28
IL92001A0 (en) 1990-07-12
ES2073445T3 (en) 1995-08-16
EP0372759B1 (en) 1995-06-28
IE71165B1 (en) 1997-01-29
EP0372759A3 (en) 1992-02-19
TR25684A (en) 1993-06-14
US5638375A (en) 1997-06-10
WO1990006641A1 (en) 1990-06-14
PT92432A (en) 1990-05-31

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