[go: up one dir, main page]

DE69732595D1 - Frequenzfolge für nachrichtenübertragungssignale unter verwendung von m-stufiger orthogonaler walsh-modulation - Google Patents

Frequenzfolge für nachrichtenübertragungssignale unter verwendung von m-stufiger orthogonaler walsh-modulation

Info

Publication number
DE69732595D1
DE69732595D1 DE69732595T DE69732595T DE69732595D1 DE 69732595 D1 DE69732595 D1 DE 69732595D1 DE 69732595 T DE69732595 T DE 69732595T DE 69732595 T DE69732595 T DE 69732595T DE 69732595 D1 DE69732595 D1 DE 69732595D1
Authority
DE
Germany
Prior art keywords
correlator
frequency
error signal
output
highest energy
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
DE69732595T
Other languages
English (en)
Other versions
DE69732595T2 (de
Inventor
Avneesh Agrawal
Rajiv Vijayan
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.)
Qualcomm Inc
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 DE69732595D1 publication Critical patent/DE69732595D1/de
Application granted granted Critical
Publication of DE69732595T2 publication Critical patent/DE69732595T2/de
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
    • H04B1/7073—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)
DE69732595T 1996-03-29 1997-03-26 Frequenzfolge für nachrichtenübertragungssignale unter verwendung von m-stufiger orthogonaler walsh-modulation Expired - Lifetime DE69732595T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US625481 1996-03-29
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 (2)

Publication Number Publication Date
DE69732595D1 true DE69732595D1 (de) 2005-04-07
DE69732595T2 DE69732595T2 (de) 2006-01-12

Family

ID=24506294

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69732595T Expired - Lifetime DE69732595T2 (de) 1996-03-29 1997-03-26 Frequenzfolge für nachrichtenübertragungssignale unter verwendung von m-stufiger orthogonaler 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)
US8374218B2 (en) * 2000-12-05 2013-02-12 Google Inc. Combining signals with a shuffled-hadamard function
US8385470B2 (en) * 2000-12-05 2013-02-26 Google Inc. Coding a signal 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
EP1810469A4 (de) * 2004-11-12 2010-06-02 Intel Corp Verfahren und vorrichtung zur entzerrungs- und dekodierungsausführung für ein kommunikationssystem
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
KR19990022148A (ko) 1999-03-25
CA2222644C (en) 2005-06-28
KR100470000B1 (ko) 2005-03-16
CN1168229C (zh) 2004-09-22
JP3860213B2 (ja) 2006-12-20
CN1185873A (zh) 1998-06-24
AU2673197A (en) 1997-10-22
RU2234197C2 (ru) 2004-08-10
US6330291B1 (en) 2001-12-11
WO1997037437A1 (en) 1997-10-09
AU727941B2 (en) 2001-01-04
EP0829146A1 (de) 1998-03-18
BR9702149A (pt) 1999-07-20
HK1010957A1 (en) 1999-07-02
CA2222644A1 (en) 1997-10-09
ATE290269T1 (de) 2005-03-15
JPH11506598A (ja) 1999-06-08
BR9702149B1 (pt) 2011-03-09
EP0829146B1 (de) 2005-03-02
DE69732595T2 (de) 2006-01-12

Similar Documents

Publication Publication Date Title
DE69732595D1 (de) Frequenzfolge für nachrichtenübertragungssignale unter verwendung von m-stufiger orthogonaler walsh-modulation
EP0337644B1 (de) Verfahren und Gerät zur Nachrichtenübertragung
CA1294071C (en) Spread spectrum optical communication system with heterodyne detection
ATE287158T1 (de) Signalubertragung mit veranderlicher datenrate in einem spreizspektrum kommunikationssystem unter verwendung von nebenklassen (coset)-kodierung
IT1239609B (it) Metodo per la formazione di un segnale multilivello su una portante ottica coerente mediante modulazione di fase e di polarizzazione della portante e apparato di trasmissione e di ricezione eterodina di segnali formati con tale metodo
JP2000124876A5 (ja) 光伝送システム、光送信装置及び光送信方法
DE69434790D1 (de) Quadraturmultiplexierung zweier durch verschiedene pn-sequenzen gespreizter datensignale
SE9702843L (sv) Kommunikation med hjälp av spektrumspridningsmetoder över optiska fibrer
CN105610565A (zh) 基于模式复用光通信系统的自相关零差探测装置及方法
NO993135D0 (no) FremgangsmÕte for polarisasjonskontroll
GB1536230A (en) Device for phase controlling a carrier wave and sidebands produced by a transmitter
US20240426640A1 (en) Integrated system for optical fiber sensing and communication through sharing co-frequency resources
WO1992000502A3 (en) Demodulation reference signal source
MX9709266A (es) Busqueda de frecuencia para señales de comunicacion que utilizan modulacion walsh ortogonal m-aria.
CA2495414A1 (en) Frequency tracking for communications signals using m-ary orthogonal walsh modulation
JPS5710554A (en) Modulation and demodulation device for frequency spread multiplex communication
JPS56102143A (en) Spectrum diffusion communication system
PT1071249E (pt) Processo e dispositivo de modulacao num emissor
CA2144552A1 (en) Optical fiber gyro
RU2002130833A (ru) Способ передачи информации в системах оптической связи
Darcie et al. Optical mixer-preamplifier for lightwave subcarrier systems
JPS55150642A (en) Sub-signal transmission system
JPS56160165A (en) Reference carrier reproducing circuit of unbalanced 4-phase modulated wave
Caponio et al. Demonstration of polarisation independent coherent transmission by synchronous intra-bit polarisation spreading
Cohen et al. Comments on" Spectral Properties of Single-Sideband Angle Modulation

Legal Events

Date Code Title Description
8364 No opposition during term of opposition