IL137894A0 - Ofdm frame synchronisation and equalisation system - Google Patents

Ofdm frame synchronisation and equalisation system

Info

Publication number
IL137894A0
IL137894A0 IL13789499A IL13789499A IL137894A0 IL 137894 A0 IL137894 A0 IL 137894A0 IL 13789499 A IL13789499 A IL 13789499A IL 13789499 A IL13789499 A IL 13789499A IL 137894 A0 IL137894 A0 IL 137894A0
Authority
IL
Israel
Prior art keywords
ofdm frame
frame synchronisation
equalisation system
equalisation
synchronisation
Prior art date
Application number
IL13789499A
Other languages
English (en)
Original Assignee
Wavesat Telecom 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 Wavesat Telecom Inc filed Critical Wavesat Telecom Inc
Publication of IL137894A0 publication Critical patent/IL137894A0/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
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2676—Blind, i.e. without using known symbols
    • H04L27/2678—Blind, i.e. without using known symbols using cyclostationarities, e.g. cyclic prefix or postfix
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
    • 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
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • 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
    • H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03414—Multicarrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03522—Frequency domain

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
IL13789499A 1998-02-26 1999-02-25 Ofdm frame synchronisation and equalisation system IL137894A0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/030,865 US6151295A (en) 1998-02-26 1998-02-26 OFDM receiving system
PCT/CA1999/000175 WO1999044326A2 (en) 1998-02-26 1999-02-25 Ofdm frame synchronisation and equalisation system

Publications (1)

Publication Number Publication Date
IL137894A0 true IL137894A0 (en) 2001-10-31

Family

ID=21856418

Family Applications (1)

Application Number Title Priority Date Filing Date
IL13789499A IL137894A0 (en) 1998-02-26 1999-02-25 Ofdm frame synchronisation and equalisation system

Country Status (17)

Country Link
US (1) US6151295A (bg)
EP (2) EP1078502A2 (bg)
JP (1) JP2002505551A (bg)
KR (1) KR100729260B1 (bg)
CN (1) CN1248474C (bg)
AU (1) AU3242599A (bg)
BG (1) BG104762A (bg)
BR (1) BR9908302A (bg)
CA (1) CA2320058C (bg)
EA (1) EA003198B1 (bg)
HK (1) HK1034009A1 (bg)
ID (1) ID26957A (bg)
IL (1) IL137894A0 (bg)
NO (1) NO20004252L (bg)
PL (1) PL343241A1 (bg)
UA (1) UA56302C2 (bg)
WO (1) WO1999044326A2 (bg)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6609189B1 (en) * 1998-03-12 2003-08-19 Yale University Cycle segmented prefix circuits
KR100442816B1 (ko) * 1998-07-08 2004-09-18 삼성전자주식회사 직교주파수분할다중화(ofdm)수신기 동기화 방법 및 장치
JP3085944B2 (ja) * 1999-02-15 2000-09-11 三菱電機株式会社 Ｏｆｄｍ通信システム用受信装置
US6785349B1 (en) 1999-05-28 2004-08-31 3Com Corporation Correlation based method of determining frame boundaries of data frames that are periodically extended
US6735255B1 (en) 1999-05-28 2004-05-11 3Com Corporation Correlation based method of determining frame boundaries of data frames that are periodically extended
US6661771B1 (en) * 1999-09-17 2003-12-09 Lucent Technologies Inc. Method and apparatus for interleaver synchronization in an orthogonal frequency division multiplexing (OFDM) communication system
CN1758618B (zh) 1999-10-22 2012-12-05 耐克斯特奈特无线公司 利用下行链路和上行链路的数据分组传送系统和方法
US6631143B1 (en) * 1999-11-12 2003-10-07 Lucent Technologies Inc. Methods and apparatus for frame synchronization in a digital audio broadcasting system
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).
US7827581B1 (en) * 2000-02-29 2010-11-02 BE Labs, Inc. Wireless multimedia system
WO2001065794A1 (en) * 2000-02-29 2001-09-07 3Com Corporation Method of multicarrier symbol synchronisation by using correlation
JP4503796B2 (ja) * 2000-08-10 2010-07-14 株式会社デンソー 同期信号生成方法、受信装置、および記録媒体
DE10039902B4 (de) 2000-08-16 2011-04-28 Rohde & Schwarz Gmbh & Co. Kg Verfahren zur Frequenz- und Zeit-Synchronisation eines Empfängers
US6693984B1 (en) 2000-08-29 2004-02-17 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for compensating for intersymbol interference in a received signal
EP1185047A1 (en) * 2000-08-29 2002-03-06 Telefonaktiebolaget Lm Ericsson Estimation and removal of intersymbol interference in multicarrier signals
EP1366591B2 (en) * 2001-03-09 2010-04-21 QUALCOMM Incorporated Method of symbol timing synchronization in communication systems
DE10112773B4 (de) * 2001-03-16 2012-09-20 Rohde & Schwarz Gmbh & Co Kg Verfahren zur Frequenz- und Zeit-Synchronisation eines OFDM-Empfängers
KR100398331B1 (ko) * 2001-04-16 2003-09-19 광주과학기술원 직교 주파수 분할 다중화 시스템의 신호 수신단 및 그신호 수신방법
FR2826208B1 (fr) * 2001-06-19 2003-12-05 Thales Sa Systeme et procede de transmission d'un signal audio ou phonie
KR20030027541A (ko) * 2001-09-29 2003-04-07 주식회사 케이티 통신 시스템에서의 비동기적인 시간기반의 데이터 송수신방법 및 장치
FR2830393B1 (fr) * 2001-10-03 2003-12-12 Canon Kk Procede et dispositif de reception optimisee
US7324428B1 (en) * 2001-10-19 2008-01-29 Legend Silicon Corporation Frame identifier
EP1868337B1 (en) * 2001-11-28 2017-01-04 Fujitsu Ltd. Orthogonal frequency division multiplex transmission method
DE60136393D1 (de) * 2001-11-28 2008-12-11 Fujitsu Ltd Orthogonal-frequenzmultiplexübertragungsverfahren
DK1529389T3 (en) * 2002-08-13 2016-05-30 Nokia Technologies Oy Symbol Interleaving
US7453792B2 (en) * 2002-11-14 2008-11-18 Edgewater Computer Systems, Inc. Receiver architecture for pilot based OFDM systems
US20040228417A1 (en) * 2003-05-12 2004-11-18 Mcnc Research And Development Institute Communication system with adaptive channel correction
US20050063298A1 (en) * 2003-09-02 2005-03-24 Qualcomm Incorporated Synchronization in a broadcast OFDM system using time division multiplexed pilots
RU2335853C2 (ru) * 2004-01-28 2008-10-10 Квэлкомм Инкорпорейтед Оценка тайминга в приемнике ofdm
US8433005B2 (en) 2004-01-28 2013-04-30 Qualcomm Incorporated Frame synchronization and initial symbol timing acquisition system and method
US8724447B2 (en) * 2004-01-28 2014-05-13 Qualcomm Incorporated Timing estimation in an OFDM receiver
US20050163263A1 (en) * 2004-01-28 2005-07-28 Gupta Alok K. Systems and methods for frequency acquisition in a wireless communication network
US7296045B2 (en) * 2004-06-10 2007-11-13 Hasan Sehitoglu Matrix-valued methods and apparatus for signal processing
US20090190675A1 (en) * 2004-08-31 2009-07-30 Qualcomm Incorporated Synchronization in a broadcast ofdm system using time division multiplexed pilots
US7298772B1 (en) 2004-09-03 2007-11-20 Redpine Signals, Inc. Packet detection, symbol timing, and coarse frequency estimation in an OFDM communications system
US7756005B2 (en) * 2005-03-11 2010-07-13 Qualcomm Incorporated Coarse timing/frame acquisition of OFDM system using time division multiplexed pilot symbol
US20060212911A1 (en) * 2005-03-15 2006-09-21 Radiospire Networks, Inc. System, method and apparatus for wireless delivery of analog media from a media source to a media sink
US7499462B2 (en) * 2005-03-15 2009-03-03 Radiospire Networks, Inc. System, method and apparatus for wireless delivery of content from a generalized content source to a generalized content sink
US20060209884A1 (en) * 2005-03-15 2006-09-21 Macmullan Samuel J System, method and apparatus for automatic detection and automatic connection between a generalized content source and a generalized content sink
US20060209892A1 (en) * 2005-03-15 2006-09-21 Radiospire Networks, Inc. System, method and apparatus for wirelessly providing a display data channel between a generalized content source and a generalized content sink
US20060209890A1 (en) * 2005-03-15 2006-09-21 Radiospire Networks, Inc. System, method and apparatus for placing training information within a digital media frame for wireless transmission
US8223623B2 (en) * 2005-03-28 2012-07-17 Qualcomm Incorporated Timing and frequency acquisition for OFDM systems
CN1992694B (zh) * 2005-12-27 2010-10-06 中兴通讯股份有限公司 一种基于正交频分复用技术的信道同步方法
KR100860743B1 (ko) * 2007-01-09 2008-09-29 한국과학기술원 직교주파수분할다중화 심볼 복조를 위한 시간동기 오프셋보상장치, 방법, 그 장치를 포함하는 수신기 및 그 방법을실행하기위한 프로그램이 기록된 컴퓨터로 읽을 수 있는기록매체.
DE102007036675A1 (de) * 2007-02-06 2008-12-24 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zur Zeitversatz-Synchronisation von OFDM Systemen
US8189719B2 (en) * 2008-05-20 2012-05-29 Qualcomm Incorporated Detection of time-domain sequences sent on a shared control channel
CN103117769B (zh) * 2013-01-25 2014-11-26 电信科学技术第一研究所 改善卫星扩频通信接收机解扩信号信噪比的方法及接收机
JP6798808B2 (ja) * 2016-07-11 2020-12-09 株式会社シマノ 自転車用制御装置、自転車コンポーネント、および、自転車用制御システム
CN107426131B (zh) * 2017-09-11 2020-07-17 河海大学 一种基于循环前缀的抗频偏低相关搜索峰定时估计方法
US11824785B2 (en) 2018-05-04 2023-11-21 Citrix Systems, Inc. Systems and methods for remote computing session display based upon user input event prioritization
US11138026B2 (en) * 2018-05-04 2021-10-05 Citrix Systems, Inc. Systems and methods for remote computing session display based upon user input event prioritization

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796280A (en) * 1987-11-06 1989-01-03 Standard Microsystems Corporation Digital data separator
US5191576A (en) * 1988-11-18 1993-03-02 L'Etat Francais and Telediffusion de France S.A. Method for broadcasting of digital data, notably for radio broadcasting at high throughput rate towards mobile receivers, with time frequency interlacing and analog synchronization
FR2658016B1 (fr) * 1990-02-06 1994-01-21 Etat Francais Cnet Procede de diffusion de donnees numeriques, notamment pour la radiodiffusion a haut debit vers des mobiles, a entrelacement temps-frequence et demodulation coherente, et recepteur correspondant.
GB9020170D0 (en) * 1990-09-14 1990-10-24 Indep Broadcasting Authority Orthogonal frequency division multiplexing
FR2671923B1 (fr) * 1991-01-17 1993-04-16 France Etat Dispositif de demodulation coherente de donnees numeriques entrelacees en temps et en frequence, a estimation de la reponse frequentielle du canal de transmission et seuillage, et emetteur correspondant.
DE4138770A1 (de) * 1991-11-26 1993-05-27 Daimler Benz Ag Verfahren zur digitalen datenuebertragung im nullsymbol des cofdm-modulationsverfahrens
JP2904986B2 (ja) * 1992-01-31 1999-06-14 日本放送協会 直交周波数分割多重ディジタル信号送信装置および受信装置
EP0578313B1 (fr) * 1992-07-08 1998-12-02 Laboratoires D'electronique Philips S.A.S. Codage enchaíné, pour la transmission OFDM
EP0613266B1 (en) * 1993-02-08 2001-06-13 Koninklijke Philips Electronics N.V. OFDM receiver with compensation for differential delays
CA2115118A1 (en) * 1993-02-08 1994-08-09 Arie Geert Cornelis Koppelaar Method of transmitting a data stream, transmitter and receiver
EP0613267A3 (en) * 1993-02-08 1996-12-04 Philips Nv MDFO system with crosstalk reduction.
US5440585A (en) * 1993-06-14 1995-08-08 At&T Corp. Applications of simultaneous analog and digital communication
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
US5444697A (en) * 1993-08-11 1995-08-22 The University Of British Columbia Method and apparatus for frame synchronization in mobile OFDM data communication
JP3074103B2 (ja) * 1993-11-16 2000-08-07 株式会社東芝 Ｏｆｄｍ同期復調回路
SG48266A1 (en) * 1993-12-22 1998-04-17 Philips Electronics Nv Multicarrier frequency hopping communications system
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
FI96372C (fi) * 1994-06-16 1996-06-10 Nokia Technology Gmbh Kehystahdistus digitaalisia radiolähetyksiä vastaanottavassa laitteessa
US5627863A (en) * 1994-07-15 1997-05-06 Amati Communications Corporation Frame synchronization in multicarrier transmission systems
IT1271322B (it) * 1994-12-23 1997-05-27 Italtel Spa Sistema e metodo di demodulazione per ricevitori ofdm
US6151374A (en) * 1996-03-04 2000-11-21 Mitsubishi Denki Kabushiki Kaisha Synchronizing signal detecting apparatus
US5914933A (en) * 1996-03-08 1999-06-22 Lucent Technologies Inc. Clustered OFDM communication system
KR100186930B1 (ko) * 1996-03-13 1999-05-15 (소장)배문한 직교성 주파수 분할 다중화 방식 신호를 이용한초기프레임동기화방법
JPH1032558A (ja) * 1996-07-16 1998-02-03 Sanyo Electric Co Ltd Ｏｆｄｍ変復調装置
FR2754125B1 (fr) * 1996-09-30 2004-07-09 Sc Reprosol Dispositif et procede d'egalisation vectorielle d'un signal ofdm

Also Published As

Publication number Publication date
KR100729260B1 (ko) 2007-06-15
HK1034009A1 (en) 2001-10-05
JP2002505551A (ja) 2002-02-19
CN1292191A (zh) 2001-04-18
NO20004252L (no) 2000-08-28
EA003198B1 (ru) 2003-02-27
ID26957A (id) 2001-02-22
WO1999044326A2 (en) 1999-09-02
BG104762A (bg) 2001-04-30
EA200000882A1 (ru) 2001-04-23
PL343241A1 (en) 2001-07-30
WO1999044326B1 (en) 1999-12-23
US6151295A (en) 2000-11-21
NO20004252D0 (no) 2000-08-24
CA2320058C (en) 2005-12-20
WO1999044326A3 (en) 1999-11-11
BR9908302A (pt) 2000-10-31
EP1361717A3 (en) 2004-02-11
KR20010041300A (ko) 2001-05-15
CA2320058A1 (en) 1999-09-02
EP1361717A2 (en) 2003-11-12
EP1078502A2 (en) 2001-02-28
CN1248474C (zh) 2006-03-29
AU3242599A (en) 1999-09-15
UA56302C2 (uk) 2003-05-15

Similar Documents

Publication Publication Date Title
IL137894A0 (en) Ofdm frame synchronisation and equalisation system
DE69924804D1 (en) Ofdm (orthogonale frequenzmultiplexierung)-empfänger
GB2372682B (en) Broadcast method and system
DK1072135T3 (da) Rammestruktur og -synkronisering til multicarrier-system
HK1094924A1 (en) Multicarrier modulation system and method
GB0405067D0 (en) Broadcast method and system
EP1058429A4 (en) COMMUNICATION SYSTEM AND METHOD
EP1152541A4 (en) METHOD FOR FORMING FEC RECOVERY ERROR CORRECTION SEQUENCE AND FEC MULTIPLEXING DEVICE
GB9930592D0 (en) Telecommunication system and method
IL134449A0 (en) Ventilated browbar frame and eyewear
GB2312528B (en) Autostereoscopic display and method
HK1036710A1 (en) Frame structure and frame synchronisation for multicarrier system
GB2373693B (en) OFDM frame synchronisation
GB9920446D0 (en) OFDM frame synchronisation
SG88757A1 (en) Reproduction method and reproduction apparatus
GB2337121B (en) Temperature estimation arrangement and method
GB9718369D0 (en) Multiplexing Method and Apparatus
IL136243A0 (en) Multicarrier communication device and multicarrier communication method
AU5443199A (en) Synchronizing device and synchronizing method
GB2341678B (en) Display picture estimation method and display picture estimation system
EP0823794A4 (en) OFDM SYSTEM AND OFDM DEVICE
GB2357007B (en) Communications system and apparatus
GB2350984B (en) Synchronisation method and system
IL149192A0 (en) Network advertisement method and system
GB9930306D0 (en) Broadcast enhancement system and method

Legal Events

Date Code Title Description
FF Patent granted
MM9K Patent not in force due to non-payment of renewal fees