HK1036713A1 - Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems - Google Patents

Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems

Info

Publication number
HK1036713A1
HK1036713A1 HK01107547A HK01107547A HK1036713A1 HK 1036713 A1 HK1036713 A1 HK 1036713A1 HK 01107547 A HK01107547 A HK 01107547A HK 01107547 A HK01107547 A HK 01107547A HK 1036713 A1 HK1036713 A1 HK 1036713A1
Authority
HK
Hong Kong
Prior art keywords
frequency synchronization
fine frequency
carrier demodulation
demodulation systems
systems
Prior art date
Application number
HK01107547A
Other languages
English (en)
Inventor
Ernst Eberlein
Sabah Badri
Stefan Lipp
Stephan Buchholz
Albert Heuberger
Heinz Gerhaeuser
Original Assignee
Fraunhofer Ges Forschung
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8166940&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=HK1036713(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of HK1036713A1 publication Critical patent/HK1036713A1/xx

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
    • 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
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
HK01107547A 1998-04-14 2001-10-30 Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems HK1036713A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1998/002184 WO1999053667A1 (fr) 1998-04-14 1998-04-14 Procede et appareil de synchronisation precise des frequences dans des systemes de demodulation a porteuses multiples

Publications (1)

Publication Number Publication Date
HK1036713A1 true HK1036713A1 (en) 2002-01-11

Family

ID=8166940

Family Applications (1)

Application Number Title Priority Date Filing Date
HK01107547A HK1036713A1 (en) 1998-04-14 2001-10-30 Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems

Country Status (19)

Country Link
US (1) US7061997B1 (fr)
EP (1) EP1072138B1 (fr)
JP (1) JP3429748B2 (fr)
KR (1) KR100377257B1 (fr)
CN (1) CN1120602C (fr)
AP (1) AP1092A (fr)
AT (1) ATE224119T1 (fr)
AU (1) AU749394B2 (fr)
BR (1) BR9815808B1 (fr)
CA (1) CA2327785C (fr)
DE (1) DE69807945T2 (fr)
DK (1) DK1072138T3 (fr)
EA (1) EA002748B1 (fr)
ES (1) ES2183370T3 (fr)
HK (1) HK1036713A1 (fr)
PT (1) PT1072138E (fr)
TW (1) TW421947B (fr)
WO (1) WO1999053667A1 (fr)
ZA (1) ZA983646B (fr)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9801748L (sv) * 1998-05-18 1999-11-19 Telia Ab Förbättringar i eller som hänför sig till telekommunikationsöverföringssystem
EP1051005A3 (fr) * 1999-05-07 2004-01-21 Alcatel Sépération des spectres original et image d'un signal multiporteuse, et structure de signal qui facilite la séparation
US6930995B1 (en) * 1999-06-23 2005-08-16 Cingular Wireless Ii, Llc Apparatus and method for synchronization in a multiple-carrier communication system by observing a plurality of synchronization indicators
US6963602B1 (en) * 2000-01-05 2005-11-08 Advanced Micro Devices, Inc. Digital correction method and system
US6956814B1 (en) * 2000-02-29 2005-10-18 Worldspace Corporation Method and apparatus for mobile platform reception and synchronization in direct digital satellite broadcast system
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
FR2814302B1 (fr) * 2000-09-20 2003-02-07 France Telecom Signal multiporteuse a pilotes repartis concu pour limiter l'interference, procede de construction d'un signal, procede de reception, recepteur et dispositif d'emission correspondants
US6633616B2 (en) * 2001-02-21 2003-10-14 Magis Networks, Inc. OFDM pilot tone tracking for wireless LAN
GB2373689A (en) * 2001-03-20 2002-09-25 Christopher James Ashton Demodulation apparatus for multi-carrier PSK signals which reduces inter-carier interference
US6985531B2 (en) * 2001-07-13 2006-01-10 Cyntrust Communications, Inc. Dual domain differential encoder/decoder
US6704372B2 (en) * 2001-09-18 2004-03-09 Broadlogic Network Technologies Inc. Digital implementation of multi-channel demodulators
KR20080059339A (ko) * 2002-06-07 2008-06-26 인터디지탈 테크날러지 코포레이션 직접 변환 다중 캐리어 프로세서를 위한 방법 및 시스템
JP3940414B2 (ja) 2002-08-28 2007-07-04 富士通株式会社 受信装置及びそのフレームタイミング検出方法
JP2005151481A (ja) 2003-11-20 2005-06-09 Fujitsu Ltd 送信方法及び送信装置
CN1330193C (zh) * 2003-11-20 2007-08-01 中兴通讯股份有限公司 一种用于差分偏移四相键控解调器的位同步装置
CN100433745C (zh) * 2004-05-21 2008-11-12 中兴通讯股份有限公司 一种п/4四相差分相移键控调制方式的接收频率补偿方法
US7570696B2 (en) * 2004-06-25 2009-08-04 Intel Corporation Multiple input multiple output multicarrier communication system and methods with quantized beamforming feedback
KR100579526B1 (ko) * 2005-02-18 2006-05-15 삼성전자주식회사 샘플링주파수 오프셋 보상방법 및 이를 적용한 ｏｆｄｍ 수신장치
US7830983B2 (en) * 2005-03-01 2010-11-09 Delphi Technologies, Inc. Method to minimize degradation in a D-MPSK hierarchical modulation system
US7773697B2 (en) * 2005-03-23 2010-08-10 Delphi Technologies, Inc. Method to demodulate amplitude offsets in a differential modulation system
JP4699113B2 (ja) * 2005-07-05 2011-06-08 パナソニック株式会社 マルチキャリア通信装置、及びマルチキャリア通信方法
DE602006009541D1 (de) * 2005-10-26 2009-11-12 France Telecom Verfahren zum Senden eines Mehrträgersignals, das für die Begrenzung von störungen ausgelegt ist, Signal, Emssionseinrichtung, Empfangsverfahren und Einrichtung und entsprechende Computerprogramme
WO2008023539A1 (fr) * 2006-08-21 2008-02-28 Panasonic Corporation Récepteur, circuit intégré et procédé de réception
CN101207594B (zh) * 2006-12-21 2010-12-15 鼎芯通讯（上海）有限公司 一种利用能量检测技术实现频率粗同步的方法
KR100891267B1 (ko) * 2007-01-11 2009-03-30 성균관대학교산학협력단 무선통신시스템을 위한 훈련 시퀀스
EP1993249B1 (fr) * 2007-05-15 2016-11-09 Rohde & Schwarz GmbH & Co. KG Procédé et dispositif d'établissement d'une déviation de fréquence porteuse en nombres entiers dans un système de transmission OFDM à l'aide d'une évaluation de différentes valeurs de modulation de différents groupes de sous-porteuses
EP2383920B1 (fr) 2007-12-20 2014-07-30 Optis Wireless Technology, LLC Signalisation de canal de contrôle utilisant un champ de signalisation commun pour le format de transport et la version de redondance
US20100183060A1 (en) * 2009-01-19 2010-07-22 Electronics And Telecommunications Research Institute Method and apparatus of frequency offset-free frame synchronization for high order qam signals in modem apparatus
US8279975B2 (en) * 2009-12-14 2012-10-02 Motorola Solutions, Inc. Method to suppress undesired sidebands in a receiver
US9054933B2 (en) 2011-12-20 2015-06-09 Intel Corporation Orthogonal frequency division multiplex (OFDM) receiver with phase noise mitigation and reduced latency
WO2013136716A1 (fr) * 2012-03-14 2013-09-19 日本電気株式会社 Dispositif de compensation de déphasage optique/différence de fréquence porteuse optique et procédé de compensation de déphasage optique/différence de fréquence porteuse optique
US9025762B2 (en) * 2012-10-23 2015-05-05 Cisco Technology, Inc. System and method for clock synchronization of acoustic echo canceller (AEC) with different sampling clocks for speakers and microphones
US9413575B2 (en) 2013-03-15 2016-08-09 Echelon Corporation Method and apparatus for multi-carrier modulation (MCM) packet detection based on phase differences
US9363128B2 (en) 2013-03-15 2016-06-07 Echelon Corporation Method and apparatus for phase-based multi-carrier modulation (MCM) packet detection
JP6148797B2 (ja) * 2013-08-30 2017-06-14 フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン 信号を送信する方法及び装置
CN104639485B (zh) * 2013-11-12 2019-01-04 联咏科技股份有限公司 载波频率偏移校正方法与载波频率偏移校正系统
CN109691053B (zh) * 2017-01-06 2021-10-22 松下电器（美国）知识产权公司 终端、基站及通信方法
CN106953826B (zh) * 2017-04-12 2020-07-31 广西师范大学 一种ofdm信号差分接收方法
US10009202B1 (en) 2017-08-14 2018-06-26 International Business Machines Corporation Direct RF demodulation
CN108234376B (zh) * 2017-12-05 2021-08-13 深圳市锐能微科技有限公司 无线数据通信方法及装置
US11082270B1 (en) * 2019-09-06 2021-08-03 Amazon Technologies, Inc. Signal quality in received wireless signals in the phase domain of shift keying demodulation

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347483A (en) * 1980-07-28 1982-08-31 Zenith Radio Corporation Frequency and phase lock loop with separated AFC and phase locking
GB9020170D0 (en) * 1990-09-14 1990-10-24 Indep Broadcasting Authority Orthogonal frequency division multiplexing
FR2666184A1 (fr) * 1990-08-24 1992-02-28 Alcatel Radiotelephone Horloge a division de frequence fractionnaire et asservissement de cette horloge.
WO1995007581A1 (fr) * 1993-09-10 1995-03-16 Deutsche Thomson-Brandt Gmbh Procede de transmission de signaux de reference dans un systeme a modulation par multiplexage frequentiel optique
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
JP3145003B2 (ja) 1995-03-23 2001-03-12 株式会社東芝 直交周波数分割多重伝送方式とその送信装置および受信装置
US5732113A (en) * 1996-06-20 1998-03-24 Stanford University Timing and frequency synchronization of OFDM signals
EP0822682A1 (fr) 1996-07-05 1998-02-04 Deutsche Thomson-Brandt Gmbh Méthode de correction de fréquence de signaux à porteuses multiples et dispositif à cet effet
JPH1041991A (ja) 1996-07-24 1998-02-13 Nippon Telegr & Teleph Corp <Ntt> ディジタル復調回路
US6192068B1 (en) * 1996-10-03 2001-02-20 Wi-Lan Inc. Multicode spread spectrum communications system
KR100238047B1 (ko) * 1997-02-25 2000-01-15 윤종용 직교 주파수분할 다중화 전송시스템의 반송파 주파수 동기 방법 및 동기 장치

Also Published As

Publication number Publication date
AU749394B2 (en) 2002-06-27
CA2327785C (fr) 2003-08-12
ZA983646B (en) 1998-11-24
EP1072138A1 (fr) 2001-01-31
US7061997B1 (en) 2006-06-13
ES2183370T3 (es) 2003-03-16
DK1072138T3 (da) 2002-12-16
EA002748B1 (ru) 2002-08-29
EA200001068A1 (ru) 2001-06-25
CA2327785A1 (fr) 1999-10-21
KR100377257B1 (ko) 2003-03-26
CN1301447A (zh) 2001-06-27
EP1072138B1 (fr) 2002-09-11
KR20010042708A (ko) 2001-05-25
JP3429748B2 (ja) 2003-07-22
AP1092A (en) 2002-08-12
DE69807945T2 (de) 2003-06-05
CN1120602C (zh) 2003-09-03
AP2000001927A0 (en) 2000-09-30
BR9815808B1 (pt) 2012-10-30
BR9815808A (pt) 2001-12-11
ATE224119T1 (de) 2002-09-15
DE69807945D1 (de) 2002-10-17
PT1072138E (pt) 2003-01-31
WO1999053667A1 (fr) 1999-10-21
TW421947B (en) 2001-02-11
AU7643298A (en) 1999-11-01
JP2002511711A (ja) 2002-04-16

Similar Documents

Publication Publication Date Title
AP2000001927A0 (en) Method and apparatus for fine frequency synchronization in multi-carrier demodulation systems
HK1029458A1 (en) Apparatus and method for modulation/demodulation with consecutive minimum
GB2320871B (en) Frame synchronization method and apparatus for use in digital communication system utilizing OFDM method
HK1040014B (zh) 減少通信信號如採用插入的導頻碼元的無線通信信號中的幅度變化和干擾的方法和裝置
GB2335860B (en) Apparatus and method for incising
SG54586A1 (en) Method and apparatus for thread synchronization in object-based systems
NO960759L (no) Fremgangsmåte og anordning for synkronisering i systemer med ortogonalt frekvensdelt multipleks
SG81984A1 (en) System, apparatus and method for multi-carrier transmission
GB9803183D0 (en) Apparatus and method
HK1035563A1 (en) Method and apparatus for stabilizing cloth
SG111018A1 (en) Apparatus and method for compensating for frequency offset in orthogonal frequency division multiplexing system
IL122020A0 (en) Method and apparatus for timing synchronization in electromagnetic receivers
ZA978516B (en) Method and apparatus for precorrecting timing and frequency in communication systems.
EP1195909A4 (fr) Procede et appareil de demodulation
GB9930092D0 (en) Vehicle locating apparatus and method
GB2335098B (en) Apparatus and method for frequency shift keying
GB2335048B (en) Method and apparatus for micro-short removal
AU1561900A (en) Method for determining frequency sub-band division in modems based on multicarrier modulation technique and system utilizing the method
GB2312361B (en) Symbol synchronization method and apparatus using the same
HUP9903204A2 (hu) Eljárás elemkoncentrációk lokalizálására egy öntvényszálban és berendezés az eljárás megvalósításához
GB9804246D0 (en) Electropermeabilisation method and apparatus
GB9420726D0 (en) Raster demodulation apparatus and method
GB0027383D0 (en) Hydrocarbon removal apparatus and method
IL126634A0 (en) Blood withdrawal apparatus and method
GB9811179D0 (en) Apparatus and method

Legal Events

Date Code Title Description
PF Patent in force
PE Patent expired

Effective date: 20180413