DE60045186D1 - Synchronisation von ofdm signalen - Google Patents

Synchronisation von ofdm signalen

Info

Publication number
DE60045186D1
DE60045186D1 DE60045186T DE60045186T DE60045186D1 DE 60045186 D1 DE60045186 D1 DE 60045186D1 DE 60045186 T DE60045186 T DE 60045186T DE 60045186 T DE60045186 T DE 60045186T DE 60045186 D1 DE60045186 D1 DE 60045186D1
Authority
DE
Germany
Prior art keywords
symbol
phases
correlation
channels
received
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
DE60045186T
Other languages
English (en)
Inventor
Lawrence W Yonge
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 Atheros Inc
Original Assignee
Atheros Communications 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 Atheros Communications Inc filed Critical Atheros Communications Inc
Application granted granted Critical
Publication of DE60045186D1 publication Critical patent/DE60045186D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2676—Blind, i.e. without using known symbols
    • H04L27/2679—Decision-aided
DE60045186T 1999-01-20 2000-01-20 Synchronisation von ofdm signalen Expired - Lifetime DE60045186D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/234,289 US6111919A (en) 1999-01-20 1999-01-20 Synchronization of OFDM signals
PCT/US2000/001399 WO2000044120A1 (en) 1999-01-20 2000-01-20 Synchronization of ofdm signals

Publications (1)

Publication Number Publication Date
DE60045186D1 true DE60045186D1 (de) 2010-12-16

Family

ID=22880748

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60045186T Expired - Lifetime DE60045186D1 (de) 1999-01-20 2000-01-20 Synchronisation von ofdm signalen

Country Status (8)

Country Link
US (1) US6111919A (de)
EP (1) EP1145470B1 (de)
JP (1) JP4751986B2 (de)
AT (1) ATE487295T1 (de)
AU (1) AU3211300A (de)
CA (1) CA2358931C (de)
DE (1) DE60045186D1 (de)
WO (1) WO2000044120A1 (de)

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6502138B2 (en) * 1998-09-25 2002-12-31 Intel Corporation Modem with code execution adapted to symbol rate
US6490628B2 (en) * 1998-09-25 2002-12-03 Intel Corporation Modem using a digital signal processor and a signal based command set
US6711205B1 (en) 1998-09-25 2004-03-23 Intel Corporation Tone detector for use in a modem
US6374312B1 (en) * 1998-09-25 2002-04-16 Intel Corporation System for dedicating a host processor to running one of a plurality of modem programs and dedicating a DSP to running another one of the modem programs
US6661848B1 (en) 1998-09-25 2003-12-09 Intel Corporation Integrated audio and modem device
US6711206B1 (en) 1998-09-25 2004-03-23 Intel Corporation Modem using a digital signal processor and separate transmit and receive sequencers
US6560276B1 (en) * 1998-09-25 2003-05-06 Intel Corporation Synchronization techniques using an interpolation filter
US6625208B2 (en) * 1998-09-25 2003-09-23 Intel Corporation Modem using batch processing of signal samples
US6631143B1 (en) * 1999-11-12 2003-10-07 Lucent Technologies Inc. Methods and apparatus for frame synchronization in a digital audio broadcasting system
DE10000008A1 (de) * 2000-01-03 2001-07-12 Alcatel Sa Verfahren zur aufwandsarmen Signal-, Ton- und Phasenwechseldetektion
ES2188372B1 (es) * 2001-05-23 2004-11-16 Diseño De Sistemas En Silicio, S.A. Procedimiento para la sincronizacion de la comunicacion mediante modulacion ofdm de multiples equipos de usuario con un equipo de cabecera (canal ascendente).
US6711221B1 (en) * 2000-02-16 2004-03-23 Thomson Licensing S.A. Sampling offset correction in an orthogonal frequency division multiplexing system
DE60021524T2 (de) * 2000-04-18 2006-06-01 Sony International (Europe) Gmbh OFDM Diversity-Übertragung
NZ506558A (en) 2000-08-25 2003-04-29 Ind Res Ltd A broadband indoor communication system using ofdm
US6870808B1 (en) 2000-10-18 2005-03-22 Adaptix, Inc. Channel allocation in broadband orthogonal frequency-division multiple-access/space-division multiple-access networks
US6950475B1 (en) * 2000-12-11 2005-09-27 Cisco Technology, Inc. OFDM receiver clock synchronization system
US6947748B2 (en) 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
WO2002049306A2 (en) * 2000-12-15 2002-06-20 Broadstorm Telecommunications, Inc. Multi-carrier communications with group-based subcarrier allocation
US7139237B2 (en) * 2000-12-29 2006-11-21 Motorola, Inc. Method and system for multirate multiuser modulation
NZ509688A (en) 2001-02-01 2003-06-30 Ind Res Ltd Maximum likelihood sychronisation (estimating time delay) for wireless digital communications system using a pilot symbol
US8619922B1 (en) 2002-02-04 2013-12-31 Marvell International Ltd. Method and apparatus for acquisition and tracking of orthogonal frequency division multiplexing symbol timing, carrier frequency offset and phase noise
US7218691B1 (en) 2001-03-05 2007-05-15 Marvell International Ltd. Method and apparatus for estimation of orthogonal frequency division multiplexing symbol timing and carrier frequency offset
ATE345618T1 (de) * 2001-03-09 2006-12-15 Flarion Technologies Inc Verfahren zur symboltaktsynchronisation in kommunikationssystemen
DE10112773B4 (de) * 2001-03-16 2012-09-20 Rohde & Schwarz Gmbh & Co Kg Verfahren zur Frequenz- und Zeit-Synchronisation eines OFDM-Empfängers
US6912262B1 (en) 2001-04-30 2005-06-28 Maxim Integrated Products, Inc. Wideband symbol synchronization in the presence of multiple strong narrowband interference
US7020218B2 (en) * 2001-06-18 2006-03-28 Arnesen David M Sliding-window transform with integrated windowing
JP3798656B2 (ja) * 2001-06-22 2006-07-19 株式会社ケンウッド 直交周波数分割多重信号受信装置、受信装置、直交周波数分割多重信号受信方法及び受信方法
US6985531B2 (en) * 2001-07-13 2006-01-10 Cyntrust Communications, Inc. Dual domain differential encoder/decoder
US7116745B2 (en) * 2002-04-17 2006-10-03 Intellon Corporation Block oriented digital communication system and method
US7327794B2 (en) * 2002-06-24 2008-02-05 Intellon Corporation Method and apparatus for detecting a jammed channel in a block oriented digital communication system
WO2004038980A2 (en) * 2002-10-21 2004-05-06 Intellon Corporation Contention-free access intervals on a csma network
GB0303546D0 (en) * 2003-02-15 2003-03-19 4I2I Comm Ltd Synchronisation method for ofdm symbols
JP4472692B2 (ja) * 2003-02-19 2010-06-02 パナソニック株式会社 ディジタルマルチキャリア伝送用受信装置及び方法
US6950387B2 (en) * 2003-02-28 2005-09-27 Wisair Ltd. Communication method, system, and apparatus that combines aspects of cyclic prefix and zero padding techniques
ES2221803B1 (es) * 2003-06-18 2006-03-01 Diseño De Sistemas En Silicio, S.A. Procedimiento de acceso al medio de transmision de multiples nodos de comunicaciones sobre red electrica.
US8090857B2 (en) 2003-11-24 2012-01-03 Qualcomm Atheros, Inc. Medium access control layer that encapsulates data from a plurality of received data units into a plurality of independently transmittable blocks
US7684568B2 (en) * 2003-11-24 2010-03-23 Intellon Corporation Encrypting data in a communication network
FR2868656B1 (fr) * 2004-04-06 2006-06-02 Wavecom Sa Signal de radiotelephonie cellulaire permettant une synchronisation au niveau d'une entite d'un canal supplementaire par numerotation des symboles, procede, terminal et station de base correspondants
DE102004044957B4 (de) * 2004-09-16 2007-04-19 Infineon Technologies Ag Medium-Zugriffs-Steuerungs-Einheit, Mobilfunkeinrichtung und Verfahren zum Abbilden mittels einer Mobilfunkeinrichtung zu übertragender Daten
US7573851B2 (en) 2004-12-07 2009-08-11 Adaptix, Inc. Method and system for switching antenna and channel assignments in broadband wireless networks
US7756005B2 (en) * 2005-03-11 2010-07-13 Qualcomm Incorporated Coarse timing/frame acquisition of OFDM system using time division multiplexed pilot symbol
US7688904B2 (en) * 2005-05-12 2010-03-30 Intellon Corporation Generating signals for transmission of information
US7590183B2 (en) * 2005-05-12 2009-09-15 Intellon Corporation Generating signals for transmission of information
US8175190B2 (en) 2005-07-27 2012-05-08 Qualcomm Atheros, Inc. Managing spectra of modulated signals in a communication network
US7729372B2 (en) 2005-07-27 2010-06-01 Sharp Corporation Communicating in a network that includes a medium having varying transmission characteristics
US7822059B2 (en) 2005-07-27 2010-10-26 Atheros Communications, Inc. Managing contention-free time allocations in a network
US7558294B2 (en) * 2005-07-27 2009-07-07 Intellon Corporation Time synchronization in a network
JP4949738B2 (ja) * 2006-05-29 2012-06-13 富士通セミコンダクター株式会社 デジタル放送受信機、移動端末およびチャネルサーチ方法
ES2478011T3 (es) * 2007-04-30 2014-07-18 Optis Wireless Technology, Llc Medidas de diferencia de tiempo de sincronización en sistemas OFDM
WO2008141165A1 (en) 2007-05-10 2008-11-20 Intellon Corporation Managing distributed access to a shared medium
US9413686B2 (en) 2007-06-04 2016-08-09 Qualcomm Incorporated Establishing a unique end-to-end management key
JP4470994B2 (ja) * 2007-12-14 2010-06-02 トヨタ自動車株式会社 車両用オーディオ装置
ES2820457T3 (es) 2010-04-12 2021-04-21 Qualcomm Inc Acuses de recibo retardados para comunicación de baja sobrecarga en una red
JP5649877B2 (ja) 2010-08-30 2015-01-07 ラピスセミコンダクタ株式会社 相関器及びそれを含む復調装置
US10091044B2 (en) 2014-07-17 2018-10-02 Conversant Intellectual Property Management Inc. System and method for frequency synchronization of Doppler-shifted subcarriers
CN111106892B (zh) * 2017-02-05 2021-08-24 大尧信息科技(湖南)有限公司 窄带无线通信终端中的同步检测方法
US11855683B2 (en) * 2021-06-29 2023-12-26 Raytheon Company Configurable acquisition engine for receiver of spread spectrum signals

Family Cites Families (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438511A (en) * 1980-11-10 1984-03-20 Telebit Corporation Packetized ensemble modem
EP0521995B1 (de) * 1990-03-30 1996-06-19 Digi-Media Vision Limited Sendung und empfang bei einer störenden interferenzumgebung
SG44771A1 (en) * 1991-02-28 1997-12-19 Philips Electronics Nv System for broadcasting and receiving digital data receiver and transmitter for use in such system
US5282222A (en) * 1992-03-31 1994-01-25 Michel Fattouche Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum
US5555268A (en) * 1994-01-24 1996-09-10 Fattouche; Michel Multicode direct sequence spread spectrum
GB9218874D0 (en) * 1992-09-07 1992-10-21 British Broadcasting Corp Improvements relating to the transmission of frequency division multiplex signals
DE69427099T2 (de) * 1993-01-20 2001-11-08 Koninkl Philips Electronics Nv Übertragungssystem mit Taktrückgewinnung
SE500986C2 (sv) * 1993-07-20 1994-10-17 Telia Ab Förfarande och anordning för synkronisering i digitalt transmissionssystem av typen OFDM
JPH0746217A (ja) * 1993-07-26 1995-02-14 Sony Corp ディジタル復調装置
JPH0746218A (ja) * 1993-07-28 1995-02-14 Sony Corp ディジタル復調装置
US5444697A (en) * 1993-08-11 1995-08-22 The University Of British Columbia Method and apparatus for frame synchronization in mobile OFDM data communication
US5596604A (en) * 1993-08-17 1997-01-21 Amati Communications Corporation Multicarrier modulation transmission system with variable delay
US5450456A (en) * 1993-11-12 1995-09-12 Daimler Benz Ag Method and arrangement for measuring the carrier frequency deviation in a multi-channel transmission system
JP3041175B2 (ja) * 1993-11-12 2000-05-15 株式会社東芝 Ｏｆｄｍ同期復調回路
JP3074103B2 (ja) * 1993-11-16 2000-08-07 株式会社東芝 Ｏｆｄｍ同期復調回路
SE501608C2 (sv) * 1994-01-18 1995-03-27 Telia Ab Förfarande och arrangemang för synkronisering vid OFDM- modulering
JP2989742B2 (ja) * 1994-05-20 1999-12-13 株式会社日立製作所 ディジタル放送システムおよび該ディジタル放送用の送信システムならびに該ディジタル放送用の受信システム
JP2731722B2 (ja) * 1994-05-26 1998-03-25 日本電気株式会社 クロック周波数自動制御方式及びそれに用いる送信装置と受信装置
US5627863A (en) * 1994-07-15 1997-05-06 Amati Communications Corporation Frame synchronization in multicarrier transmission systems
JP3421879B2 (ja) * 1994-10-05 2003-06-30 ソニー株式会社 復調装置
JP3447823B2 (ja) * 1994-11-11 2003-09-16 アルパイン株式会社 デジタル放送受信方法
US5682376A (en) * 1994-12-20 1997-10-28 Matsushita Electric Industrial Co., Ltd. Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor
US5774450A (en) * 1995-01-10 1998-06-30 Matsushita Electric Industrial Co., Ltd. Method of transmitting orthogonal frequency division multiplexing signal and receiver thereof
JP3116764B2 (ja) * 1995-02-15 2000-12-11 株式会社日立製作所 ディジタル伝送信号の受信器ならびにディジタル伝送方式
JP3130752B2 (ja) * 1995-02-24 2001-01-31 株式会社東芝 Ｏｆｄｍ伝送受信方式及び送受信装置
SE514986C2 (sv) * 1995-03-01 2001-05-28 Telia Ab Metod och anordning för synkronisering vid OFDM-system
US5636224A (en) * 1995-04-28 1997-06-03 Motorola Inc. Method and apparatus for interleave/de-interleave addressing in data communication circuits
FI99252C (fi) * 1995-07-03 1997-12-29 Nokia Mobile Phones Ltd Yhdistetty radiosignaalin modulointi- ja monikäyttömenetelmä
JP2875976B2 (ja) * 1996-01-29 1999-03-31 三星電子株式会社 直交周波数分割多重の方法及び同期方法と、直交周波数分割多重用変調器及び復調器
US5802117A (en) * 1996-02-08 1998-09-01 Philips Electronics North America Corporation Method and apparatus for joint frequency offset and timing estimation of a multicarrier modulation system
KR100186930B1 (ko) * 1996-03-13 1999-05-15 (소장)배문한 직교성 주파수 분할 다중화 방식 신호를 이용한초기프레임동기화방법
US5802044A (en) * 1996-04-26 1998-09-01 Motorola, Inc. Multicarrier reverse link timing synchronization system, device and method
JP3556047B2 (ja) * 1996-05-22 2004-08-18 三菱電機株式会社 ディジタル放送受信機
US5732113A (en) * 1996-06-20 1998-03-24 Stanford University Timing and frequency synchronization of OFDM signals
CA2183140C (en) * 1996-08-12 2001-11-20 Grant Mcgibney Ofdm timing and frequency recovery system
GB2319935B (en) * 1996-11-29 2001-10-24 Daewoo Electronics Co Ltd Apparatus for correcting frequency offset in ofdm receiving system
JP3563231B2 (ja) * 1997-04-04 2004-09-08 株式会社デノン 周波数制御装置および方法、受信装置、ならびに、通信装置
US5991289A (en) * 1997-08-05 1999-11-23 Industrial Technology Research Institute Synchronization method and apparatus for guard interval-based OFDM signals
JP3946893B2 (ja) * 1998-12-28 2007-07-18 株式会社東芝 ディジタル通信装置

Also Published As

Publication number Publication date
WO2000044120A1 (en) 2000-07-27
JP2002535919A (ja) 2002-10-22
US6111919A (en) 2000-08-29
EP1145470A4 (de) 2006-01-11
AU3211300A (en) 2000-08-07
JP4751986B2 (ja) 2011-08-17
WO2000044120A8 (en) 2001-06-21
ATE487295T1 (de) 2010-11-15
EP1145470B1 (de) 2010-11-03
CA2358931A1 (en) 2000-07-27
CA2358931C (en) 2009-09-08
EP1145470A1 (de) 2001-10-17

Similar Documents

Publication Publication Date Title
ATE487295T1 (de) Synchronisation von ofdm signalen
KR100234330B1 (ko) Ofdm 시스템 수신기의 보호 구간 종류 검출장치 및 그 방법
TW363321B (en) Timing synchronization in a receiver employing orthogonal frequency division multiplexing
EP1720311A1 (de) Synchronisierung in digitalen Kommunikationssystemen
ATE314772T1 (de) Synchronisation von ofdm signalen mit verbesserter fensterfunktion
KR970701464A (ko) 씨디엠에이 전송 시스템의 확산 스펙트럼 코드를 초기 동기시키기 위한 장치 및 방법(device and method for initially synchronizing spread-spectrum code of cdma transmission system)
SE9302453D0 (sv) Foerfarande och anordning foer synkronisering i digitalt transmissionssystem av typen ofdm
ATE311705T1 (de) System und verfahren zur erreichung von synchronisation mit zwei detektionsschwellen
US7616723B2 (en) Method for symbol timing synchronization and apparatus thereof
US20080309543A1 (en) System and method for obtaining frequency and time synchronization in a wideband communication system
WO2007100982A3 (en) Synchronization for ofdm signals
MY124731A (en) Method and apparatus for estimating a frequency offset by combining pilot symbols and data symbols
KR20000062603A (ko) 디지털 원격통신 시스템을 위한 수신 장치 및 동기화 방법
NO982996D0 (no) FremgangsmÕte for Õ detektere en oppsett-skur for et anrop, samt mottaker
CN109743073A (zh) 基于独特码的大频偏直接序列扩频快速同步方法
AU749787B2 (en) Coarse frequency synchronization in multicarrier systems systems
EE200000469A (et) Meetod ja seade sagedussünkronisatsioonisignaali detekteerimiseks
AR008906A1 (es) Metodo y desmodulador para determinar los limites de simbolos en una corriente de datos
WO2002049265A2 (en) Fully digital symbol synchronization technique
WO2018065061A1 (en) Receiver and method for compensating a frequency error in a reference clock
US6912262B1 (en) Wideband symbol synchronization in the presence of multiple strong narrowband interference
KR19980023283A (ko) Ofdm전송방식에서의 보호구간을 이용한 프레임 동기검출장치
KR20060079743A (ko) 가변 길이의 보호구간을 사용하는 오에프디엠 기반에서의보호구간의 길이 검출 방법 및 그 장치
GB9929328D0 (en) Data processing
US5528632A (en) Non-complex dual-correlation phase reversal detector and method

Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: ATHEROS COMMUNICATIONS, INC., SANTA CLARA, CAL, US