CN1168229C - 用m-阵列的正交沃尔什调制对通信信号进行的频率跟踪 - Google Patents

用m-阵列的正交沃尔什调制对通信信号进行的频率跟踪 Download PDF

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Publication number
CN1168229C
CN1168229C CNB971902690A CN97190269A CN1168229C CN 1168229 C CN1168229 C CN 1168229C CN B971902690 A CNB971902690 A CN B971902690A CN 97190269 A CN97190269 A CN 97190269A CN 1168229 C CN1168229 C CN 1168229C
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China
Prior art keywords
frequency
correlation
walsh
generating
correlation result
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Expired - Fee Related
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CNB971902690A
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English (en)
Chinese (zh)
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CN1185873A (zh
Inventor
ϣ
阿夫尼希·阿格拉瓦尔
ά
拉吉夫·维贾沿
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Qualcomm Inc
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Qualcomm Inc
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    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0065—Frequency error detectors

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
CNB971902690A 1996-03-29 1997-03-26 用m-阵列的正交沃尔什调制对通信信号进行的频率跟踪 Expired - Fee Related CN1168229C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/625,481 US6330291B1 (en) 1996-03-29 1996-03-29 Frequency tracking for communication signals using M-ary orthogonal walsh modulation
US08/625,481 1996-03-29

Publications (2)

Publication Number Publication Date
CN1185873A CN1185873A (zh) 1998-06-24
CN1168229C true CN1168229C (zh) 2004-09-22

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Family Applications (1)

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CNB971902690A Expired - Fee Related CN1168229C (zh) 1996-03-29 1997-03-26 用m-阵列的正交沃尔什调制对通信信号进行的频率跟踪

Country Status (12)

Country Link
US (1) US6330291B1 (enExample)
EP (1) EP0829146B1 (enExample)
JP (1) JP3860213B2 (enExample)
KR (1) KR100470000B1 (enExample)
CN (1) CN1168229C (enExample)
AT (1) ATE290269T1 (enExample)
AU (1) AU727941B2 (enExample)
BR (1) BR9702149B1 (enExample)
CA (1) CA2222644C (enExample)
DE (1) DE69732595T2 (enExample)
RU (1) RU2234197C2 (enExample)
WO (1) WO1997037437A1 (enExample)

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US6134260A (en) * 1997-12-16 2000-10-17 Ericsson Inc. Method and apparatus for frequency acquisition and tracking for DS-SS CDMA receivers
US6563858B1 (en) * 1998-01-16 2003-05-13 Intersil Americas Inc. Method of performing antenna diversity in spread spectrum in wireless local area network
DE19846870C1 (de) * 1998-10-12 2001-01-25 Peter Peyerl Verfahren zur Bestimmung der Impulsantwort eines breitbandigen linearen Systems und Meßanordnung zur Durchführung des Verfahrens
FR2795257A1 (fr) * 1999-06-15 2000-12-22 Koninkl Philips Electronics Nv Detecteur de phase pour systeme de transmission a etalement de spectre
US6977974B1 (en) * 2000-11-20 2005-12-20 At&T Corp. De-modulation of MOK(M-ary orthogonal modulation)
US8385470B2 (en) * 2000-12-05 2013-02-26 Google Inc. Coding a signal with a shuffled-Hadamard function
US8374218B2 (en) * 2000-12-05 2013-02-12 Google Inc. Combining signals with a shuffled-hadamard function
JP4572482B2 (ja) * 2001-04-11 2010-11-04 株式会社デンソー Ｃｄｍａ方式の無線通信機の復調装置
FI110725B (fi) 2001-04-20 2003-03-14 Nokia Corp Menetelmä vastaanottimen tahdistamisessa ja vastaanotin
US6552996B2 (en) * 2001-09-18 2003-04-22 Interdigital Communications Corporation OVSF code system and methods
KR100534592B1 (ko) * 2002-06-20 2005-12-07 한국전자통신연구원 디지털 통신 시스템의 수신 장치 및 그 방법
US6795486B2 (en) * 2002-09-23 2004-09-21 Thomson Licensing S.A. Variable-length correlator for spread-spectrum communications
US7787357B2 (en) * 2003-12-18 2010-08-31 Motorola, Inc. OFDM frequency offset estimation apparatus and method
CN101044731A (zh) * 2004-11-12 2007-09-26 英特尔公司 用于执行通信系统的均衡和解码的方法和设备
US8139685B2 (en) 2005-05-10 2012-03-20 Qualcomm Incorporated Systems, methods, and apparatus for frequency control
KR100821938B1 (ko) * 2006-04-14 2008-04-15 삼성전자주식회사 무선통신시스템에서 상향링크 주파수 옵셋 추정 장치 및방법
KR100947604B1 (ko) * 2007-12-17 2010-03-15 한국전자통신연구원 이동통신 시스템에서 2차 루프 필터를 사용하는 주파수오차 추정기 및 그 동작방법
US9071493B2 (en) * 2009-06-29 2015-06-30 Qualcomm Incorporated Dual frequency tracking loop for OFDMA systems
JP5621476B2 (ja) * 2010-09-29 2014-11-12 ソニー株式会社 同期回路、同期方法、および受信システム
CN111614373B (zh) * 2020-05-20 2021-08-10 北京升哲科技有限公司 扩频信号发送、扩频信号接收方法、装置、设备及介质
CN114389640B (zh) * 2022-01-17 2023-05-30 深圳华海尖兵科技有限公司 复杂信号条件下的调制及解调方法、装置及电子设备

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494238A (en) * 1982-06-30 1985-01-15 Motorola, Inc. Multiple channel data link system
US4841544A (en) 1987-05-14 1989-06-20 The Charles Stark Draper Laboratory, Inc. Digital direct sequence spread spectrum receiver
NZ232223A (en) * 1989-01-27 1993-03-26 British Telecomm Alternate burst communication for cordless phones re-established after channel failure
IL100213A (en) * 1990-12-07 1995-03-30 Qualcomm Inc CDMA microcellular telephone system and distributed antenna system therefor
US5357454A (en) 1991-07-25 1994-10-18 Ericsson Ge Mobile Communications Holding, Inc. Fast walsh transform processor
US5687166A (en) * 1992-11-24 1997-11-11 Stanford Telecommunications, Inc. Modulation system for spread spectrum CDMA communication
US5822318A (en) * 1994-07-29 1998-10-13 Qualcomm Incorporated Method and apparatus for controlling power in a variable rate communication system
US5619524A (en) * 1994-10-04 1997-04-08 Motorola, Inc. Method and apparatus for coherent communication reception in a spread-spectrum communication system
US5608722A (en) * 1995-04-03 1997-03-04 Qualcomm Incorporated Multi-user communication system architecture with distributed receivers
US5623487A (en) * 1995-05-19 1997-04-22 Stanford Telecommunications, Inc. Doubly orthogonal code and frequency division multiple access communication system
US5764630A (en) * 1996-03-25 1998-06-09 Stanford Telecommunications, Inc. Forward link carrier recovery in an OCDMA spread spectrum communication system without a pilot tone

Also Published As

Publication number Publication date
EP0829146A1 (en) 1998-03-18
DE69732595D1 (de) 2005-04-07
JPH11506598A (ja) 1999-06-08
AU727941B2 (en) 2001-01-04
BR9702149A (pt) 1999-07-20
ATE290269T1 (de) 2005-03-15
KR100470000B1 (ko) 2005-03-16
RU2234197C2 (ru) 2004-08-10
EP0829146B1 (en) 2005-03-02
CA2222644A1 (en) 1997-10-09
DE69732595T2 (de) 2006-01-12
AU2673197A (en) 1997-10-22
CN1185873A (zh) 1998-06-24
US6330291B1 (en) 2001-12-11
BR9702149B1 (pt) 2011-03-09
WO1997037437A1 (en) 1997-10-09
JP3860213B2 (ja) 2006-12-20
CA2222644C (en) 2005-06-28
KR19990022148A (ko) 1999-03-25
HK1010957A1 (en) 1999-07-02

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Address after: Holy land, California, Egypt

Patentee after: QUALCOMM Inc.

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Patentee before: Qualcomm Inc.

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Granted publication date: 20040922

Termination date: 20110326