FR2732173B1 - Systeme de communications en diversite de temps a spectre disperse - Google Patents

Systeme de communications en diversite de temps a spectre disperse

Info

Publication number
FR2732173B1
FR2732173B1 FR9603583A FR9603583A FR2732173B1 FR 2732173 B1 FR2732173 B1 FR 2732173B1 FR 9603583 A FR9603583 A FR 9603583A FR 9603583 A FR9603583 A FR 9603583A FR 2732173 B1 FR2732173 B1 FR 2732173B1
Authority
FR
France
Prior art keywords
communication system
time diversity
diversity communication
spectrum time
disperse
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.)
Expired - Lifetime
Application number
FR9603583A
Other languages
English (en)
Other versions
FR2732173A1 (fr
Inventor
Ichiro Tsujimoto
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Publication of FR2732173A1 publication Critical patent/FR2732173A1/fr
Application granted granted Critical
Publication of FR2732173B1 publication Critical patent/FR2732173B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • 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
    • H04B1/71—Interference-related aspects the interference being narrowband interference
    • H04B1/7102—Interference-related aspects the interference being narrowband interference with transform to frequency domain

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
FR9603583A 1995-03-22 1996-03-22 Systeme de communications en diversite de temps a spectre disperse Expired - Lifetime FR2732173B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7062821A JP2705623B2 (ja) 1995-03-22 1995-03-22 ダイバーシチ送受信方法及び送受信機

Publications (2)

Publication Number Publication Date
FR2732173A1 FR2732173A1 (fr) 1996-09-27
FR2732173B1 true FR2732173B1 (fr) 2005-08-05

Family

ID=13211388

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9603583A Expired - Lifetime FR2732173B1 (fr) 1995-03-22 1996-03-22 Systeme de communications en diversite de temps a spectre disperse

Country Status (3)

Country Link
US (2) US5757853A (fr)
JP (1) JP2705623B2 (fr)
FR (1) FR2732173B1 (fr)

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US6826169B1 (en) 1996-12-20 2004-11-30 Fujitsu Limited Code multiplexing transmitting apparatus
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US6377812B1 (en) * 1997-11-20 2002-04-23 University Of Maryland Combined power control and space-time diversity in mobile cellular communications
DE69832483T2 (de) 1998-08-19 2006-06-08 Siemens Ag Spreizspektrumempfänger zur Verminderung von Nachbarsymbolstörungen
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WO2000049730A1 (fr) * 1999-02-16 2000-08-24 Mitsubishi Denki Kabushiki Kaisha Systeme de communication radio, emetteur et recepteur
JP3379465B2 (ja) * 1999-03-03 2003-02-24 日本電気株式会社 無線通信システム及びそれに用いる基地局並びに移動機
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US6487254B1 (en) * 1999-05-07 2002-11-26 Lucent Technologies Inc. Methods and devices for estimating QAM symbol sequences over flat fading channels using multiple offset sequences
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KR20010065122A (ko) * 1999-12-29 2001-07-11 송문섭 광대역-시디엠에이 무선 가입자망 시스템에서 송신 장치
US7154958B2 (en) * 2000-07-05 2006-12-26 Texas Instruments Incorporated Code division multiple access wireless system with time reversed space time block transmitter diversity
JP2002151937A (ja) * 2000-11-15 2002-05-24 Nec Corp 適応アレーアンテナ受信装置
KR100353641B1 (ko) * 2000-12-21 2002-09-28 삼성전자 주식회사 부호분할다중접속 이동통신시스템의 기지국 전송 안테나다이버시티 장치 및 방법
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US7778365B2 (en) * 2001-04-27 2010-08-17 The Directv Group, Inc. Satellite TWTA on-line non-linearity measurement
US7639759B2 (en) * 2001-04-27 2009-12-29 The Directv Group, Inc. Carrier to noise ratio estimations from a received signal
US7471735B2 (en) 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US7822154B2 (en) 2001-04-27 2010-10-26 The Directv Group, Inc. Signal, interference and noise power measurement
US7583728B2 (en) 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US8005035B2 (en) * 2001-04-27 2011-08-23 The Directv Group, Inc. Online output multiplexer filter measurement
US7340016B2 (en) * 2001-05-11 2008-03-04 Telefonaktiebolaget Lm Ericsson (Publ) Equalizers for multi-branch receiver
US6990137B2 (en) * 2001-05-17 2006-01-24 Qualcomm, Incorporated System and method for received signal prediction in wireless communications systems
US7170924B2 (en) * 2001-05-17 2007-01-30 Qualcomm, Inc. System and method for adjusting combiner weights using an adaptive algorithm in wireless communications system
US7577100B2 (en) * 2001-07-27 2009-08-18 Stephen Pollmann System and method for measuring signal to noise values in an adaptive wireless communication system
JP2003060618A (ja) * 2001-08-17 2003-02-28 Sony Corp 送信機、受信機、無線通信システム、無線送信方法、無線受信方法、プログラム並びにプログラム記録媒体
US6957050B2 (en) * 2001-10-23 2005-10-18 Celletra Ltd. Time-delay transmit diversity add-on to a multicarrier base transceiver system
US6757321B2 (en) * 2002-05-22 2004-06-29 Interdigital Technology Corporation Segment-wise channel equalization based data estimation
EP1372269A1 (fr) * 2002-06-12 2003-12-17 Agilent Technologies, Inc. - a Delaware corporation - Récepteur amélioré à spectre étalé de type RAKE
AU2003281452A1 (en) 2002-07-03 2004-01-23 The Directv Group, Inc. Method and apparatus for layered modulation
ES2398213T3 (es) 2002-10-25 2013-03-14 The Directv Group, Inc. Procesador de señal de modulación en capas de baja complejidad
US7142818B2 (en) * 2003-02-13 2006-11-28 Honeywell International, Inc. Systems and methods for reducing radio receiver interference from an on-board avionics transmitter
US7272176B2 (en) * 2003-02-18 2007-09-18 Qualcomm Incorporated Communication receiver with an adaptive equalizer
US7257377B2 (en) * 2003-02-18 2007-08-14 Qualcomm, Incorporated Systems and methods for improving channel estimation
US20040161057A1 (en) * 2003-02-18 2004-08-19 Malladi Durga Prasad Communication receiver with a rake-based adaptive equalizer
US7346103B2 (en) 2003-03-03 2008-03-18 Interdigital Technology Corporation Multi user detection using equalization and successive interference cancellation
US7224714B1 (en) * 2003-04-25 2007-05-29 Hellosoft, Inc. Method and apparatus for channel characterization in direct sequence spread spectrum based wireless communication systems
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US8233555B2 (en) * 2004-05-17 2012-07-31 Qualcomm Incorporated Time varying delay diversity of OFDM
US8290024B2 (en) * 2004-08-12 2012-10-16 Texas Instruments Incorporated Methods and apparatus to facilitate improved code division multiple access receivers
US8126098B2 (en) 2006-09-12 2012-02-28 Marvell World Trade Ltd. Multi-rake receiver
US20080084861A1 (en) * 2006-10-10 2008-04-10 Honeywell International Inc. Avionics communication system and method utilizing multi-channel radio technology and a shared data bus
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JP4498381B2 (ja) * 2007-04-26 2010-07-07 株式会社東芝 無線通信方法、無線送信装置及び無線受信装置
US8081933B2 (en) * 2007-07-13 2011-12-20 Honeywell International Inc. Reconfigurable aircraft radio communications system
US8019338B2 (en) * 2008-05-29 2011-09-13 Honeywell International Inc. Reconfigurable aircraft communications system with integrated avionics communication router and audio management functions
JP5239529B2 (ja) 2008-06-10 2013-07-17 富士通セミコンダクター株式会社 同期検出器及び通信機器
JP4621757B2 (ja) * 2008-07-04 2011-01-26 京セラ株式会社 無線通信システム、無線送信装置、無線受信装置および無線通信方法
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Also Published As

Publication number Publication date
JP2705623B2 (ja) 1998-01-28
JPH08265236A (ja) 1996-10-11
FR2732173A1 (fr) 1996-09-27
US5757853A (en) 1998-05-26
US6075808A (en) 2000-06-13

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