HK1010957A1 - Frequency tracking for communication signals usingm-ary orthogonal walsh modulation. - Google Patents

Frequency tracking for communication signals usingm-ary orthogonal walsh modulation.

Info

Publication number
HK1010957A1
HK1010957A1 HK98110023A HK98110023A HK1010957A1 HK 1010957 A1 HK1010957 A1 HK 1010957A1 HK 98110023 A HK98110023 A HK 98110023A HK 98110023 A HK98110023 A HK 98110023A HK 1010957 A1 HK1010957 A1 HK 1010957A1
Authority
HK
Hong Kong
Prior art keywords
correlator
frequency tracking
frequency
error signal
output
Prior art date
Application number
HK98110023A
Other languages
English (en)
Inventor
Rajiv Vijayan
Avneesh Agrawal
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of HK1010957A1 publication Critical patent/HK1010957A1/xx

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
    • H04B1/7073—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

Landscapes

  • 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)
HK98110023A 1996-03-29 1998-08-19 Frequency tracking for communication signals usingm-ary orthogonal walsh modulation. HK1010957A1 (en)

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
PCT/US1997/006379 WO1997037437A1 (en) 1996-03-29 1997-03-26 Frequency tracking for communication signals using m-ary orthogonal walsh modulation

Publications (1)

Publication Number Publication Date
HK1010957A1 true HK1010957A1 (en) 1999-07-02

Family

ID=24506294

Family Applications (1)

Application Number Title Priority Date Filing Date
HK98110023A HK1010957A1 (en) 1996-03-29 1998-08-19 Frequency tracking for communication signals usingm-ary orthogonal walsh modulation.

Country Status (13)

Country Link
US (1) US6330291B1 (de)
EP (1) EP0829146B1 (de)
JP (1) JP3860213B2 (de)
KR (1) KR100470000B1 (de)
CN (1) CN1168229C (de)
AT (1) ATE290269T1 (de)
AU (1) AU727941B2 (de)
BR (1) BR9702149B1 (de)
CA (1) CA2222644C (de)
DE (1) DE69732595T2 (de)
HK (1) HK1010957A1 (de)
RU (1) RU2234197C2 (de)
WO (1) WO1997037437A1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6134260A (en) * 1997-12-16 2000-10-17 Ericsson Inc. Method and apparatus for frequency acquisition and tracking for DS-SS CDMA receivers
US6678310B1 (en) * 1998-01-16 2004-01-13 Intersil Americas Inc Wireless local area network spread spectrum transceiver with multipath mitigation
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
WO2006052156A1 (en) * 2004-11-12 2006-05-18 Intel Corporation Method and apparatus to perform equalization and decoding for a communication system
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 (8)

* 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
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
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
BR9702149B1 (pt) 2011-03-09
CN1168229C (zh) 2004-09-22
AU727941B2 (en) 2001-01-04
RU2234197C2 (ru) 2004-08-10
CA2222644A1 (en) 1997-10-09
WO1997037437A1 (en) 1997-10-09
BR9702149A (pt) 1999-07-20
ATE290269T1 (de) 2005-03-15
CN1185873A (zh) 1998-06-24
DE69732595T2 (de) 2006-01-12
EP0829146A1 (de) 1998-03-18
DE69732595D1 (de) 2005-04-07
EP0829146B1 (de) 2005-03-02
JPH11506598A (ja) 1999-06-08
CA2222644C (en) 2005-06-28
JP3860213B2 (ja) 2006-12-20
KR100470000B1 (ko) 2005-03-16
KR19990022148A (ko) 1999-03-25
US6330291B1 (en) 2001-12-11
AU2673197A (en) 1997-10-22

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20110326