WO1995034997A3 - Diversity combining for antennas - Google Patents

Diversity combining for antennas Download PDF

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Publication number
WO1995034997A3
WO1995034997A3 PCT/SE1995/000622 SE9500622W WO9534997A3 WO 1995034997 A3 WO1995034997 A3 WO 1995034997A3 SE 9500622 W SE9500622 W SE 9500622W WO 9534997 A3 WO9534997 A3 WO 9534997A3
Authority
WO
WIPO (PCT)
Prior art keywords
antennas
receiver
disjunct
diversity combining
received signals
Prior art date
Application number
PCT/SE1995/000622
Other languages
French (fr)
Other versions
WO1995034997A2 (en
Inventor
Berth Jonas Karlsson
Ulf Goeran Forssen
Roland Stig Bodin
Original Assignee
Ericsson Telefon Ab L M
Berth Jonas Karlsson
Ulf Goeran Forssen
Roland Stig Bodin
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 Ericsson Telefon Ab L M, Berth Jonas Karlsson, Ulf Goeran Forssen, Roland Stig Bodin filed Critical Ericsson Telefon Ab L M
Priority to BR9507800A priority Critical patent/BR9507800A/en
Priority to EP95920360A priority patent/EP0763307A2/en
Priority to AU25834/95A priority patent/AU695327B2/en
Priority to JP8502013A priority patent/JPH10501395A/en
Publication of WO1995034997A2 publication Critical patent/WO1995034997A2/en
Publication of WO1995034997A3 publication Critical patent/WO1995034997A3/en
Priority to FI964775A priority patent/FI109947B/en
Priority to KR1019960706860A priority patent/KR970703656A/en

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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture

Abstract

An antenna configuration increases the sensitivity of a base station by providing a plurality of antennas each of which cover a disjunct or partially disjunct area of a larger cell. A receiver for each antenna receives signals transmitted from mobile stations. Equalizers are attached to each receiver for correcting the received signals. A combiner then combines the received signals from the different antennas so as to form an estimate of the transmitted signal.
PCT/SE1995/000622 1994-06-03 1995-05-31 Diversity combining for antennas WO1995034997A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR9507800A BR9507800A (en) 1994-06-03 1995-05-31 Cellular communications system with a plurality of base stations and a plurality of mobile stations
EP95920360A EP0763307A2 (en) 1994-06-03 1995-05-31 Diversity combining for antennas
AU25834/95A AU695327B2 (en) 1994-06-03 1995-05-31 Diversity combining for antennas
JP8502013A JPH10501395A (en) 1994-06-03 1995-05-31 Diversity coupling for antennas
FI964775A FI109947B (en) 1994-06-03 1996-11-29 Diversity composition for antennas
KR1019960706860A KR970703656A (en) 1994-06-03 1996-12-02 Diversity combining of antennas (DIVERSITY COMBINING FOR ANTENNAS)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25329494A 1994-06-03 1994-06-03
US253,294 1994-06-03

Publications (2)

Publication Number Publication Date
WO1995034997A2 WO1995034997A2 (en) 1995-12-21
WO1995034997A3 true WO1995034997A3 (en) 1996-02-08

Family

ID=22959666

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/000622 WO1995034997A2 (en) 1994-06-03 1995-05-31 Diversity combining for antennas

Country Status (11)

Country Link
US (1) US5884192A (en)
EP (1) EP0763307A2 (en)
JP (1) JPH10501395A (en)
KR (1) KR970703656A (en)
CN (1) CN1149946A (en)
AU (1) AU695327B2 (en)
BR (1) BR9507800A (en)
CA (1) CA2191957A1 (en)
FI (1) FI109947B (en)
RU (1) RU2183906C2 (en)
WO (1) WO1995034997A2 (en)

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US7286855B2 (en) 1995-02-22 2007-10-23 The Board Of Trustees Of The Leland Stanford Jr. University Method and apparatus for adaptive transmission beam forming in a wireless communication system
US6101399A (en) 1995-02-22 2000-08-08 The Board Of Trustees Of The Leland Stanford Jr. University Adaptive beam forming for transmitter operation in a wireless communication system
US6006110A (en) * 1995-02-22 1999-12-21 Cisco Technology, Inc. Wireless communication network using time-varying vector channel equalization for adaptive spatial equalization
US6212387B1 (en) * 1995-10-18 2001-04-03 Sc-Wireless Inc. Method and apparatus for collector arrays of directional antennas co-located with zone managers in wireless communications systems
EP2184864A3 (en) * 1996-04-26 2011-12-14 AT & T Corp. Method and apparatus for data transmission using multiple transmit antennas
WO1998018271A2 (en) 1996-10-18 1998-04-30 Watkins Johnson Company Wireless communication network using time-varying vector channel equalization for adaptive spatial equalization
US6052599A (en) * 1997-01-30 2000-04-18 At & T Corp. Cellular communication system with multiple same frequency broadcasts in a cell
FI103618B1 (en) 1997-07-04 1999-07-30 Nokia Telecommunications Oy Interpreting the received signal
US6009335A (en) * 1997-09-26 1999-12-28 Rockwell Science Center, Inc. Method of calibrating and testing spatial nulling antenna
US6108564A (en) * 1997-12-31 2000-08-22 Lucent Technologies, Inc. Interference rejection by means of null-space transformations
FR2777720B1 (en) * 1998-04-16 2000-05-26 Alsthom Cge Alcatel DIVERSITY RECEIVER
US6411824B1 (en) * 1998-06-24 2002-06-25 Conexant Systems, Inc. Polarization-adaptive antenna transmit diversity system
US6574293B1 (en) * 1998-10-28 2003-06-03 Ericsson Inc. Receivers and methods for reducing interference in radio communications
WO2000036765A1 (en) 1998-12-15 2000-06-22 Nokia Networks Oy A receiver
US6470192B1 (en) 1999-08-16 2002-10-22 Telefonaktiebolaget Lm Ericcson (Publ) Method of an apparatus for beam reduction and combining in a radio communications system
US6594475B1 (en) 1999-09-09 2003-07-15 International Business Machines Corporation Mobile battery discharge minimization in indoor wireless networks by antenna switching
US6115419A (en) * 1999-10-21 2000-09-05 Philips Electronics North America Corporation Adaptive digital beamforming receiver with π/2 phase shift to improve signal reception
WO2001095506A2 (en) * 2000-06-08 2001-12-13 Spike Broadband Systems, Inc. Scalable sector wide area networks in wireless communication systems
US6369758B1 (en) 2000-11-01 2002-04-09 Unique Broadband Systems, Inc. Adaptive antenna array for mobile communication
US20020150185A1 (en) * 2001-03-29 2002-10-17 Joseph Meehan Diversity combiner for reception of digital television signals
CN101159468B (en) * 2007-11-19 2012-03-21 北京天碁科技有限公司 Associated detection based diversity receiving device and method
US8548081B2 (en) * 2008-02-20 2013-10-01 Qualcomm Incorporated Methods and apparatus for diversity combining of repeated signals in OFDMA systems
US8626096B2 (en) * 2008-03-24 2014-01-07 Qualcomm Incorporated Methods and apparatus for combining signals from multiple diversity sources
US20100067435A1 (en) * 2008-09-18 2010-03-18 Krishna Balachandran Architecture to support network-wide multiple-in-multiple-out wireless communication over an uplink
US8447237B2 (en) 2010-04-12 2013-05-21 Telefonaktiebolaget L M Ericsson (Publ) Interference avoidance in white space communication systems

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457448A1 (en) * 1990-05-17 1991-11-21 Orbitel Mobile Communications Limited Receiver systems
EP0460748A1 (en) * 1990-06-06 1991-12-11 Philips Patentverwaltung GmbH Receiver with at least two receiving branches
WO1991020142A1 (en) * 1990-06-12 1991-12-26 Motorola, Inc. Maximal ratio diversity combining technique
EP0540387A2 (en) * 1991-10-17 1993-05-05 Alcatel N.V. Cellular radio communication system with phased array antenne
EP0637878A2 (en) * 1993-08-02 1995-02-08 Harris Corporation Space diversity combiner
EP0639035A1 (en) * 1993-08-12 1995-02-15 Nortel Networks Corporation Base station antenna arrangement

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US3593147A (en) * 1969-03-04 1971-07-13 Itt Equal gain diversity receiving system with squelch
US3633107A (en) * 1970-06-04 1972-01-04 Bell Telephone Labor Inc Adaptive signal processor for diversity radio receivers
GB1567888A (en) * 1977-05-02 1980-05-21 Motorola Inc Sectored antenna receiving system
US4369520A (en) * 1979-03-22 1983-01-18 Motorola, Inc. Instantaneously acquiring sector antenna combining system
US4293955A (en) * 1980-03-17 1981-10-06 Telex Communications, Inc. Diversity reception system
US4544927A (en) * 1982-11-04 1985-10-01 Sperry Corporation Wideband beamformer
CA2021232C (en) * 1989-07-17 1993-09-21 Hiroyasu Muto Diversity receiving system for use in digital radio communication with means for selecting branch by estimating propagation path property
US5067147A (en) * 1989-11-07 1991-11-19 Pactel Corporation Microcell system for cellular telephone system
US5031193A (en) * 1989-11-13 1991-07-09 Motorola, Inc. Method and apparatus for diversity reception of time-dispersed signals
NZ239733A (en) * 1990-09-21 1994-04-27 Ericsson Ge Mobile Communicat Mobile telephone diversity reception with predetect signal combination
US5067173A (en) * 1990-12-20 1991-11-19 At&T Bell Laboratories Microcellular communications system using space diversity reception
KR960012086B1 (en) * 1991-11-11 1996-09-12 모토로라 인코포레이티드 Method and apparatus for reducing interference in a radio communication link of a cellular communication
US5515378A (en) * 1991-12-12 1996-05-07 Arraycomm, Inc. Spatial division multiple access wireless communication systems
US5274844A (en) * 1992-05-11 1993-12-28 Motorola, Inc. Beam pattern equalization method for an adaptive array

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457448A1 (en) * 1990-05-17 1991-11-21 Orbitel Mobile Communications Limited Receiver systems
EP0460748A1 (en) * 1990-06-06 1991-12-11 Philips Patentverwaltung GmbH Receiver with at least two receiving branches
WO1991020142A1 (en) * 1990-06-12 1991-12-26 Motorola, Inc. Maximal ratio diversity combining technique
EP0540387A2 (en) * 1991-10-17 1993-05-05 Alcatel N.V. Cellular radio communication system with phased array antenne
EP0637878A2 (en) * 1993-08-02 1995-02-08 Harris Corporation Space diversity combiner
EP0639035A1 (en) * 1993-08-12 1995-02-15 Nortel Networks Corporation Base station antenna arrangement

Also Published As

Publication number Publication date
US5884192A (en) 1999-03-16
EP0763307A2 (en) 1997-03-19
WO1995034997A2 (en) 1995-12-21
RU2183906C2 (en) 2002-06-20
AU695327B2 (en) 1998-08-13
KR970703656A (en) 1997-07-03
CN1149946A (en) 1997-05-14
CA2191957A1 (en) 1995-12-21
BR9507800A (en) 1997-08-05
FI964775A (en) 1996-11-29
AU2583495A (en) 1996-01-05
JPH10501395A (en) 1998-02-03
FI964775A0 (en) 1996-11-29
FI109947B (en) 2002-10-31

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