CA2004808A1 - Combination spatial diversity system - Google Patents

Combination spatial diversity system

Info

Publication number
CA2004808A1
CA2004808A1 CA2004808A CA2004808A CA2004808A1 CA 2004808 A1 CA2004808 A1 CA 2004808A1 CA 2004808 A CA2004808 A CA 2004808A CA 2004808 A CA2004808 A CA 2004808A CA 2004808 A1 CA2004808 A1 CA 2004808A1
Authority
CA
Canada
Prior art keywords
quality
unit
spatial diversity
diversity system
antenna
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
CA2004808A
Other languages
French (fr)
Other versions
CA2004808C (en
Inventor
John David Kaewell, Jr.
Nicholas Carl Schreier
James Joseph Roller
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.)
InterDigital Technology Corp
Original Assignee
InterDigital 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 InterDigital Inc filed Critical InterDigital Inc
Publication of CA2004808A1 publication Critical patent/CA2004808A1/en
Application granted granted Critical
Publication of CA2004808C publication Critical patent/CA2004808C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H04B7/0802—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 antenna selection
    • H04B7/0817—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 antenna selection with multiple receivers and antenna path selection
    • H04B7/082—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 antenna selection with multiple receivers and antenna path selection selecting best antenna path

Abstract

A spatial diversity system for digital mobile tele-phone networks which comprises at least two antennas, one antenna being part of a primary (or master) unit and the other being part of a diversity (or slave) unit, each unit having processing means to detect the "quality" of digital audo signals received by their respective antennas, the "quality" comprising link quality, AGC level and parity errors; the primary unit being capable of comparing the "quality" of the audio signals received by each antenna, selecting the higher "quality" signal and transmitting the higher "quality" signal to the telephone network.
CA002004808A 1988-12-08 1989-12-06 Combination spatial diversity system Expired - Lifetime CA2004808C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/281,186 US4953197A (en) 1988-12-08 1988-12-08 Combination spatial diversity system
US281,186 1988-12-08

Publications (2)

Publication Number Publication Date
CA2004808A1 true CA2004808A1 (en) 1990-06-08
CA2004808C CA2004808C (en) 1995-01-10

Family

ID=23076303

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002004808A Expired - Lifetime CA2004808C (en) 1988-12-08 1989-12-06 Combination spatial diversity system

Country Status (22)

Country Link
US (1) US4953197A (en)
JP (1) JPH02244913A (en)
CN (1) CN1014196B (en)
AU (1) AU606300B2 (en)
BE (1) BE1003343A3 (en)
BR (1) BR8906366A (en)
CA (1) CA2004808C (en)
CZ (1) CZ286014B6 (en)
DE (1) DE3940690C2 (en)
ES (1) ES2017869A6 (en)
FI (1) FI107852B (en)
FR (1) FR2640446B1 (en)
GB (1) GB2227910B (en)
HU (1) HU209626B (en)
IL (1) IL92520A0 (en)
IT (1) IT1239544B (en)
NL (1) NL193711C (en)
NO (1) NO178879C (en)
NZ (1) NZ231618A (en)
PL (1) PL164583B1 (en)
SE (1) SE506088C2 (en)
ZA (1) ZA90428B (en)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713808A (en) * 1985-11-27 1987-12-15 A T & E Corporation Watch pager system and communication protocol
US5097484A (en) * 1988-10-12 1992-03-17 Sumitomo Electric Industries, Ltd. Diversity transmission and reception method and equipment
US5140627A (en) * 1990-10-09 1992-08-18 Telefonaktiebolaget L M Ericsson Handoff procedure that minimizes disturbances to dtmf signalling in a cellular radio system
US5373548A (en) * 1991-01-04 1994-12-13 Thomson Consumer Electronics, Inc. Out-of-range warning system for cordless telephone
GB2272134B (en) * 1992-04-24 1995-09-06 Motorola Inc Method and apparatus for determining signal transmission quality levels of a transmitted signal
AU4454993A (en) * 1992-08-10 1994-02-17 Lucent Technologies Inc. A radio communication system and a radio base station for use in such a system
US5561673A (en) * 1993-04-16 1996-10-01 Matsushita Electric Industrial Co., Ltd. Antenna switched diversity reciever
US5507035A (en) * 1993-04-30 1996-04-09 International Business Machines Corporation Diversity transmission strategy in mobile/indoor cellula radio communications
FI109737B (en) * 1993-08-25 2002-09-30 Nokia Corp Method and system for controlling the fuse of the recipients' frequency-frequency central channels in a digital transmission device
US6005856A (en) * 1993-11-01 1999-12-21 Omnipoint Corporation Communication protocol for spread spectrum wireless communication system
US6094575A (en) * 1993-11-01 2000-07-25 Omnipoint Corporation Communication system and method
US6088590A (en) * 1993-11-01 2000-07-11 Omnipoint Corporation Method and system for mobile controlled handoff and link maintenance in spread spectrum communication
US5586170A (en) * 1994-08-19 1996-12-17 Georgia Tech Research Corporation Cellular devices, systems and methods using intercell macro-diversity and dynamic channel allocation
US6334219B1 (en) 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
US5742583A (en) 1994-11-03 1998-04-21 Omnipoint Corporation Antenna diversity techniques
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
US5781612A (en) * 1995-03-10 1998-07-14 Northern Telecom Limited Radio terminal interfaces for voice and data telecommunications, and methods for their operation
US5845216A (en) * 1995-05-30 1998-12-01 Sierra Wireless, Inc. Optimized companding for communication over cellular systems
US5959980A (en) 1995-06-05 1999-09-28 Omnipoint Corporation Timing adjustment control for efficient time division duplex communication
US5745484A (en) 1995-06-05 1998-04-28 Omnipoint Corporation Efficient communication system using time division multiplexing and timing adjustment control
US5689502A (en) * 1995-06-05 1997-11-18 Omnipoint Corporation Efficient frequency division duplex communication system with interleaved format and timing adjustment control
US5802046A (en) * 1995-06-05 1998-09-01 Omnipoint Corporation Efficient time division duplex communication system with interleaved format and timing adjustment control
US5911120A (en) * 1995-09-08 1999-06-08 At&T Wireless Services Wireless communication system having mobile stations establish a communication link through the base station without using a landline or regional cellular network and without a call in progress
US5732360A (en) * 1995-09-08 1998-03-24 At & T Wireless Services And Atmel Corp Mobile telecommunication device and method used for changing wireless communication between base stations of different kinds
US5675629A (en) 1995-09-08 1997-10-07 At&T Cordless cellular system base station
CA2188845A1 (en) * 1996-10-25 1998-04-25 Stephen Ross Todd Diversity Antenna Selection
EP0876045B1 (en) * 1997-04-28 2003-09-10 Nortel Networks Limited Method and system for verifying and storing call related records in a telecommunications network
US7116959B1 (en) * 1997-09-30 2006-10-03 Harman Becker Automotive Systems Gmbh Apparatus for selecting a receiver among a plurality of receivers in a diversity receiver system based upon automatic gain correction
EP0999669A1 (en) * 1998-11-06 2000-05-10 Nortel Matra Cellular Method and apparatus for diversity reception of user messages with different forward error correction
DE19852091C1 (en) * 1998-11-12 2000-05-25 Deutsche Telekom Mobil Method and device for improving the audio quality in a mobile radio network
US6947469B2 (en) 1999-05-07 2005-09-20 Intel Corporation Method and Apparatus for wireless spread spectrum communication with preamble processing period
US6564105B2 (en) * 2000-01-21 2003-05-13 Medtronic Minimed, Inc. Method and apparatus for communicating between an ambulatory medical device and a control device via telemetry using randomized data
US20070111689A1 (en) * 2000-07-24 2007-05-17 Hermann Link Apparatus for selecting a receiver among a plurality of receivers in a diversity receiver system based upon automatic gain correction
JP5021114B2 (en) 2000-09-07 2012-09-05 ソニー株式会社 Wireless relay system and method
GB2370724B (en) * 2000-12-21 2004-07-14 Ubinetics Ltd Personal wireless communications apparatus
US6961545B2 (en) * 2001-04-09 2005-11-01 Atheros Communications, Inc. Method and system for providing antenna diversity
JP4043850B2 (en) * 2002-06-03 2008-02-06 松下電器産業株式会社 Diversity switching device
US6930602B2 (en) * 2003-04-25 2005-08-16 Medtronic, Inc. Coaxial cable antenna for communication with implanted medical devices
US7272445B2 (en) * 2003-10-02 2007-09-18 Medtronic, Inc. Medical device programmer with faceplate
US20050075685A1 (en) * 2003-10-02 2005-04-07 Forsberg John W. Medical device programmer with infrared communication
US7203549B2 (en) * 2003-10-02 2007-04-10 Medtronic, Inc. Medical device programmer with internal antenna and display
US7729766B2 (en) * 2003-10-02 2010-06-01 Medtronic, Inc. Circuit board construction for handheld programmer
US7561921B2 (en) * 2003-10-02 2009-07-14 Medtronic, Inc. Neurostimulator programmer with internal antenna
US7263406B2 (en) 2003-10-02 2007-08-28 Medtronic, Inc. Medical device programmer with selective disablement of display during telemetry
US7991479B2 (en) * 2003-10-02 2011-08-02 Medtronic, Inc. Neurostimulator programmer with clothing attachable antenna
US7706768B2 (en) * 2006-08-02 2010-04-27 Intel Corporation Diversity switching
EP2341652B1 (en) * 2010-01-05 2016-08-17 Alcatel Lucent Reception of a diversity-protected data flow in a radio communication network
US8706058B2 (en) 2011-03-24 2014-04-22 Honeywell International Inc. RF data transfer in a spherical cavity
US9813262B2 (en) 2012-12-03 2017-11-07 Google Technology Holdings LLC Method and apparatus for selectively transmitting data using spatial diversity
US9591508B2 (en) 2012-12-20 2017-03-07 Google Technology Holdings LLC Methods and apparatus for transmitting data between different peer-to-peer communication groups
US9979531B2 (en) 2013-01-03 2018-05-22 Google Technology Holdings LLC Method and apparatus for tuning a communication device for multi band operation
US10229697B2 (en) 2013-03-12 2019-03-12 Google Technology Holdings LLC Apparatus and method for beamforming to obtain voice and noise signals
US9549290B2 (en) 2013-12-19 2017-01-17 Google Technology Holdings LLC Method and apparatus for determining direction information for a wireless device
EP3742760A1 (en) * 2017-09-07 2020-11-25 Oticon A/s Power management in low power wireless link in a hearing aid system

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328698A (en) * 1963-06-28 1967-06-27 Itt Selector for choosing the strongest signal including means for inhibiting all signals below a selected level
DE2360929C2 (en) * 1973-12-06 1975-07-17 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for selecting a diversity channel via which data is transmitted in the form of bits
JPS5727629B2 (en) * 1973-12-19 1982-06-11
CA1065020A (en) * 1974-06-27 1979-10-23 William L. Hatton High reliability diversity communications system
JPS5119912A (en) * 1974-08-12 1976-02-17 Mitsubishi Electric Corp Oh kaisendaibaashiteihoshikino kaisenkirikaehoshiki
JPS5147313A (en) * 1974-10-21 1976-04-22 Nippon Telegraph & Telephone
JPS5542790B2 (en) * 1975-01-09 1980-11-01
JPS51112210A (en) * 1975-03-28 1976-10-04 Hitachi Ltd Mobile communication equipment
US4028627A (en) * 1975-12-29 1977-06-07 Motorola, Inc. Sample and hold valley detector
JPS5428669A (en) * 1977-08-08 1979-03-03 Nec Corp Noise measuring circuit
US4214213A (en) * 1977-10-25 1980-07-22 Rca Corporation Signal selecting system
JPS585617B2 (en) * 1978-04-05 1983-02-01 株式会社日立国際電気 Diversity transmission and reception method of digital transmission
DE3006990C2 (en) * 1980-02-25 1984-10-11 Ivan Grigor'evič Leningrad Kirienko Device for automatic antenna switching in the event of multiple reception
DE3015087A1 (en) * 1980-04-19 1981-10-22 Robert Bosch Gmbh, 7000 Stuttgart TRANSMIT / RECEPTION PATH MONITORING DEVICE
US4383332A (en) * 1980-11-21 1983-05-10 Bell Telephone Laboratories, Incorporated High capacity digital mobile radio system
US4477809A (en) * 1982-06-18 1984-10-16 General Electric Company Method for random-access radio-frequency data communications
US4513412A (en) * 1983-04-25 1985-04-23 At&T Bell Laboratories Time division adaptive retransmission technique for portable radio telephones
JPS60214641A (en) * 1984-04-10 1985-10-26 Nec Corp Space diversity communication system
US4644561A (en) * 1985-03-20 1987-02-17 International Mobile Machines Corp. Modem for RF subscriber telephone system
US4675863A (en) * 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
JPH0683127B2 (en) * 1985-07-22 1994-10-19 日本電気株式会社 Diversity receiver radio
US4704734A (en) * 1986-02-18 1987-11-03 Motorola, Inc. Method and apparatus for signal strength measurement and antenna selection in cellular radiotelephone systems
JPH0779299B2 (en) * 1986-08-30 1995-08-23 日本電気株式会社 Portable radio
US4779262A (en) * 1986-10-21 1988-10-18 International Mobile Machines Corp. Connection of subscriber communication network base station to external information network
US4777633A (en) * 1987-08-14 1988-10-11 International Mobile Machines Corp. Base station for wireless digital telephone system

Also Published As

Publication number Publication date
JPH02244913A (en) 1990-09-28
CS8906956A2 (en) 1991-07-16
NO894893D0 (en) 1989-12-06
HU896471D0 (en) 1990-02-28
ES2017869A6 (en) 1991-03-01
IT8948631A0 (en) 1989-12-06
NL8903028A (en) 1990-07-02
HUT60578A (en) 1992-09-28
FR2640446B1 (en) 1994-08-05
IT8948631A1 (en) 1991-06-06
FR2640446A1 (en) 1990-06-15
CA2004808C (en) 1995-01-10
SE8904132D0 (en) 1989-12-07
CN1014196B (en) 1991-10-02
GB2227910A (en) 1990-08-08
GB8927341D0 (en) 1990-01-31
NZ231618A (en) 1992-10-28
NO178879B (en) 1996-03-11
IL92520A0 (en) 1990-08-31
NO178879C (en) 1996-06-19
DE3940690A1 (en) 1990-06-13
IT1239544B (en) 1993-11-05
ZA90428B (en) 1990-10-31
PL164583B1 (en) 1994-08-31
BR8906366A (en) 1990-08-21
BE1003343A3 (en) 1992-03-03
FI107852B (en) 2001-10-15
NL193711B (en) 2000-03-01
US4953197A (en) 1990-08-28
AU4585289A (en) 1990-07-19
GB2227910B (en) 1993-10-27
CZ286014B6 (en) 1999-12-15
SE8904132L (en) 1990-06-09
SE506088C2 (en) 1997-11-10
NL193711C (en) 2000-07-04
CN1043414A (en) 1990-06-27
AU606300B2 (en) 1991-01-31
FI895813A0 (en) 1989-12-05
HU209626B (en) 1994-09-28
DE3940690C2 (en) 2001-02-08
NO894893L (en) 1990-06-11

Similar Documents

Publication Publication Date Title
CA2004808A1 (en) Combination spatial diversity system
CA1236606A (en) Cordless telephone system
CA1311802C (en) Diversity antenna communication system
EP1615353A3 (en) Wireless telephone distribution system with time and space diversity transmission
CA2305586A1 (en) Positioning system for digital telephone networks
AU7925194A (en) Multiple antenna home base for digital cordless telephones
MXPA03011572A (en) Fade resistant digital transmission and reception system.
CA2193394A1 (en) Adaptive sectorization in a spread spectrum communication system
CA2071490A1 (en) Satellite based acknowledge-back paging system
CA2041283A1 (en) Antenna selection diversity reception system
CA2267517A1 (en) Cdma adaptive antenna receiving apparatus and communication system
IL105990A (en) Infra-red communication system
CA2118355A1 (en) Orthogonal polarization and time varying offsetting of signals for digital data transmission or reception
EP0926916A3 (en) Spatial division multiple access wireless communication systems
WO1999063683A8 (en) Reverse link antenna diversity in a wireless telephony system
CA2309721A1 (en) Diversity reception system
WO1998034424A3 (en) Cellular communication system with multiple same frequency broadcasts in a cell
WO1996012355A3 (en) A wireless digital communication system, a radio apparatus, a digital speaker, and a digital speaker controlling apparatus
AU7894298A (en) A method for selecting a signal, and a cellular radio system
TW223203B (en)
CA2028775A1 (en) Cordless telephone apparatus
MY105799A (en) Combination spatial diversity system
PT92892A (en) Combination spatial diversity system
CA2042563A1 (en) Method and apparatus for transmitting a signal with an offset which follows a received signal
EP0889601A3 (en) Radio communication system having regular channels and protection channel selectively used for high-priority signal and low-priority signal

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry