SG79208A1 - Method and apparatus to implement antenna diversity for direct sequence spread spectrum receivers - Google Patents

Method and apparatus to implement antenna diversity for direct sequence spread spectrum receivers

Info

Publication number
SG79208A1
SG79208A1 SG9611078A SG1996011078A SG79208A1 SG 79208 A1 SG79208 A1 SG 79208A1 SG 9611078 A SG9611078 A SG 9611078A SG 1996011078 A SG1996011078 A SG 1996011078A SG 79208 A1 SG79208 A1 SG 79208A1
Authority
SG
Singapore
Prior art keywords
spread spectrum
direct sequence
antenna diversity
sequence spread
spectrum receivers
Prior art date
Application number
SG9611078A
Other languages
English (en)
Inventor
Weerackody Vijitha
Original Assignee
At & T Corp
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 At & T Corp filed Critical At & T Corp
Publication of SG79208A1 publication Critical patent/SG79208A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • 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
    • 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
    • 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
    • H04B7/0865—Independent weighting, i.e. weights based on own antenna reception parameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)
SG9611078A 1995-11-13 1996-11-08 Method and apparatus to implement antenna diversity for direct sequence spread spectrum receivers SG79208A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US55595995A 1995-11-13 1995-11-13

Publications (1)

Publication Number Publication Date
SG79208A1 true SG79208A1 (en) 2001-03-20

Family

ID=24219310

Family Applications (1)

Application Number Title Priority Date Filing Date
SG9611078A SG79208A1 (en) 1995-11-13 1996-11-08 Method and apparatus to implement antenna diversity for direct sequence spread spectrum receivers

Country Status (7)

Country Link
US (1) US5949833A (fr)
EP (1) EP0773638A1 (fr)
JP (1) JP3088308B2 (fr)
KR (1) KR970025649A (fr)
CA (1) CA2186793C (fr)
MX (1) MX9605370A (fr)
SG (1) SG79208A1 (fr)

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FI108762B (fi) * 1996-12-10 2002-03-15 Nokia Corp Menetelmä toisteen aikaansaamiseksi ja tukiasemalaitteisto
US6996077B1 (en) 1997-07-03 2006-02-07 Kabushiki Kaisha Toshiba Satellite broadcasting system
JP2914445B2 (ja) * 1997-08-05 1999-06-28 日本電気株式会社 Ｃｄｍａ適応受信装置
US6185258B1 (en) 1997-09-16 2001-02-06 At&T Wireless Services Inc. Transmitter diversity technique for wireless communications
US6058105A (en) * 1997-09-26 2000-05-02 Lucent Technologies Inc. Multiple antenna communication system and method thereof
WO1999023766A2 (fr) * 1997-10-31 1999-05-14 At & T Wireless Services, Inc. Detection par probabilite maximale a faible complexite de codes d'espace concatenes pour applications sans fil
US6188736B1 (en) * 1997-12-23 2001-02-13 At&T Wireless Svcs. Inc. Near-optimal low-complexity decoding of space-time codes for fixed wireless applications
JP2918873B1 (ja) * 1998-02-17 1999-07-12 株式会社エイ・ティ・アール環境適応通信研究所 スペクトル拡散通信用アレーアンテナ装置
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
JPH11340949A (ja) * 1998-05-21 1999-12-10 Matsushita Electric Ind Co Ltd Ｃｄｍａ通信装置及びｃｄｍａ通信方法
US6459740B1 (en) 1998-09-17 2002-10-01 At&T Wireless Services, Inc. Maximum ratio transmission
EP0993129B1 (fr) * 1998-10-07 2007-01-24 Texas Instruments Incorporated Estimation de canal dans une diversité d'émission codée par blocs spatials-temporels pour WCDMA
US6128330A (en) 1998-11-24 2000-10-03 Linex Technology, Inc. Efficient shadow reduction antenna system for spread spectrum
SE516105C2 (sv) * 1999-06-11 2001-11-19 Allgon Ab En metod för att styra strålningsmönstret hos en antenn, ett antennsystem och en radiokommunikationsanordning
US6801564B2 (en) 2000-02-23 2004-10-05 Ipr Licensing, Inc. Reverse link correlation filter in wireless communication systems
US7068628B2 (en) * 2000-05-22 2006-06-27 At&T Corp. MIMO OFDM system
US7161974B2 (en) * 2001-09-10 2007-01-09 Sasken Communication Technologies Ltd. Method for 2D antenna rake combining in a code division multiplication access system
CA2415170C (fr) 2001-12-28 2008-07-15 Ntt Docomo, Inc. Recepteur, emetteur, systeme de communication et methode de communication
US7139533B2 (en) * 2002-09-24 2006-11-21 Hitachi, Ltd. Mobile communication terminal
US7983355B2 (en) * 2003-07-09 2011-07-19 Broadcom Corporation System and method for RF signal combining and adaptive bit loading for data rate maximization in multi-antenna communication systems
US7822140B2 (en) * 2003-03-17 2010-10-26 Broadcom Corporation Multi-antenna communication systems utilizing RF-based and baseband signal weighting and combining
US8185075B2 (en) 2003-03-17 2012-05-22 Broadcom Corporation System and method for channel bonding in multiple antenna communication systems
US7389096B2 (en) * 2003-04-07 2008-06-17 Bellow Bellows Llc Monitoring system using multi-antenna transceivers
US7646744B2 (en) * 2003-04-07 2010-01-12 Shaolin Li Method of operating multi-antenna wireless data processing system
US8014374B2 (en) * 2003-04-07 2011-09-06 Bellow Bellows Llc System and method for achieving timing compatibility with multi-antenna wireless data protocols
US7933255B2 (en) * 2003-04-07 2011-04-26 Bellow Bellows Llc Multi-antenna wireless data processing system
US7512083B2 (en) * 2003-04-07 2009-03-31 Shaolin Li Single chip multi-antenna wireless data processor
EP1654891B1 (fr) * 2003-05-01 2015-02-18 Broadcom Corporation Procede de generation de ponderation pour systemes de communication a antennes multiples utilisant la ponderation et la combinaison de signaux de bande de base et de signaux rf
US8391322B2 (en) * 2003-07-09 2013-03-05 Broadcom Corporation Method and system for single weight (SW) antenna system for spatial multiplexing (SM) MIMO system for WCDMA/HSDPA
JP2005260294A (ja) * 2004-03-09 2005-09-22 Nec Corp 携帯型通信端末の照光装置
JP2006173920A (ja) * 2004-12-14 2006-06-29 Alps Electric Co Ltd スマートアンテナ装置及び該スマートアンテナ装置を用いた複合スマートアンテナ装置
US7573398B2 (en) * 2005-06-29 2009-08-11 General Electric Company System and method of communicating signals
US8903325B2 (en) * 2011-02-21 2014-12-02 Empire Technology Development Llc Using out-band information to improve wireless communications
CN103986496B (zh) * 2014-05-26 2016-03-02 成都乾伍信息技术有限公司 一种ds/fh信号的调制系统及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5394435A (en) * 1992-12-29 1995-02-28 At&T Corp. Diversity for direct-sequence spread spectrum systems
JPH0774687A (ja) * 1993-09-03 1995-03-17 Kokusai Denshin Denwa Co Ltd <Kdd> ダイバーシチ方式
US5434893A (en) * 1992-12-22 1995-07-18 Commissariat Energie Atomique Component for a differential transmitter-receiver of signals with direct sequence spread spectrum and the corresponding transmitter-receiver

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US5107273A (en) * 1981-05-11 1992-04-21 The United States Of America As Represented By The Secretary Of The Army Adaptive steerable null antenna processor with null indicator
US4752969A (en) * 1986-01-16 1988-06-21 Kenneth Rilling Anti-multipath signal processor
US5255210A (en) * 1988-10-28 1993-10-19 The Regents Of The University Of California Self-coherence restoring signal extraction apparatus and method
JPH04185130A (ja) * 1990-11-20 1992-07-02 Clarion Co Ltd スペクトラム拡散通信用ダイバーシチ受信装置
US5305353A (en) 1992-05-29 1994-04-19 At&T Bell Laboratories Method and apparatus for providing time diversity
US5481570A (en) * 1993-10-20 1996-01-02 At&T Corp. Block radio and adaptive arrays for wireless systems
JP2734953B2 (ja) * 1993-12-16 1998-04-02 日本電気株式会社 Ｃｄｍａ受信装置
JP3122301B2 (ja) * 1994-03-02 2001-01-09 沖電気工業株式会社 空間ダイバーシチ受信装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5434893A (en) * 1992-12-22 1995-07-18 Commissariat Energie Atomique Component for a differential transmitter-receiver of signals with direct sequence spread spectrum and the corresponding transmitter-receiver
US5394435A (en) * 1992-12-29 1995-02-28 At&T Corp. Diversity for direct-sequence spread spectrum systems
JPH0774687A (ja) * 1993-09-03 1995-03-17 Kokusai Denshin Denwa Co Ltd <Kdd> ダイバーシチ方式

Also Published As

Publication number Publication date
CA2186793A1 (fr) 1997-05-14
MX9605370A (es) 1997-05-31
JPH09153844A (ja) 1997-06-10
CA2186793C (fr) 2000-12-19
JP3088308B2 (ja) 2000-09-18
US5949833A (en) 1999-09-07
KR970025649A (ko) 1997-06-24
EP0773638A1 (fr) 1997-05-14

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