BRPI0409726A - método de demodulação de sinais do tipo ofdm na presença de fortes sinais de interferência co-canal - Google Patents

método de demodulação de sinais do tipo ofdm na presença de fortes sinais de interferência co-canal

Info

Publication number
BRPI0409726A
BRPI0409726A BRPI0409726-2A BRPI0409726A BRPI0409726A BR PI0409726 A BRPI0409726 A BR PI0409726A BR PI0409726 A BRPI0409726 A BR PI0409726A BR PI0409726 A BRPI0409726 A BR PI0409726A
Authority
BR
Brazil
Prior art keywords
interference signals
channel interference
demodulation
signal
strong
Prior art date
Application number
BRPI0409726-2A
Other languages
English (en)
Inventor
Denis Masse
Francois Pipon
Ryn Mhiri
Original Assignee
Thales Sa
Telediffusion Fse
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 Thales Sa, Telediffusion Fse filed Critical Thales Sa
Publication of BRPI0409726A publication Critical patent/BRPI0409726A/pt

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
    • H04L27/2649—Demodulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"MéTODO DE DEMODULAçãO DE SINAIS DO TIPO OFDM NA PRESENçA DE FORTES SINAIS DE INTERFERêNCIA CO-CANAL". Método de demodular um sinal em um sistema de transmissão em que a modulação inclui várias sub-portadoras substancialmente ortogonais, o vetor do canal de propagação H ¢n, k! sendo conhecido, ou o sinal recebido que inclui pelo menos símbolos pilotos que emitem dados de referência. Ele compreende pelo menos uma etapa de estimar o símbolo a¢n,k! emitido na késima sub-portadora do nésimo símbolo da modulação com o auxilio de uma recombinação que pondera os vários sinais recebidos após a sincronização e a demodulação x¢n,k!. Aplicação à demodulação dos bits TPS de um sinal DVB-T.
BRPI0409726-2A 2003-04-25 2004-04-16 método de demodulação de sinais do tipo ofdm na presença de fortes sinais de interferência co-canal BRPI0409726A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0305124A FR2854290B1 (fr) 2003-04-25 2003-04-25 Procede de demodulation de signaux de type ofdm en presence de signaux brouilleurs co-canaux forts
PCT/EP2004/050558 WO2004098140A1 (fr) 2003-04-25 2004-04-16 Procede de demodulation de signaux de type ofdm en presence de signaux brouilleurs co-canaux forts

Publications (1)

Publication Number Publication Date
BRPI0409726A true BRPI0409726A (pt) 2006-04-25

Family

ID=33104413

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0409726-2A BRPI0409726A (pt) 2003-04-25 2004-04-16 método de demodulação de sinais do tipo ofdm na presença de fortes sinais de interferência co-canal

Country Status (10)

Country Link
US (1) US7623579B2 (pt)
EP (1) EP1618715A1 (pt)
JP (1) JP4605797B2 (pt)
KR (1) KR101032284B1 (pt)
CN (1) CN1781292B (pt)
AU (1) AU2004234882B2 (pt)
BR (1) BRPI0409726A (pt)
FR (1) FR2854290B1 (pt)
HK (1) HK1092616A1 (pt)
WO (1) WO2004098140A1 (pt)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101141428B (zh) * 2006-09-06 2011-05-04 上海贝尔阿尔卡特股份有限公司 正交频分复用系统中的导频编译码方法及装置
GB2444100B (en) * 2006-11-24 2009-10-28 Imagination Tech Ltd Channel estimation and equalization in ofdm receivers
US8238436B2 (en) * 2007-03-30 2012-08-07 Mediatek Inc. Methods and device for fast acquisition of digital video signals
FR2919931A1 (fr) * 2007-08-08 2009-02-13 Thales Sa Procede et dispositif pour determiner la reponse impulsionnelle de canaux de propagation impliquant des emetteurs, des reflecteurs et des capteurs fixes ou mobiles
EP2509267B1 (en) * 2007-08-15 2015-02-11 Marvell World Trade Ltd. Pilot design for universal frequency reuse in cellular orthogonal frequency-division multiplexing systems
US20090185648A1 (en) * 2008-01-22 2009-07-23 Guo-Hau Gau Methods and devices for processing signals transmitted via communication system
FR2927756B1 (fr) 2008-02-19 2010-06-18 Tdf Reseau de transmission synchrone de donnees et procede de surveillance d'un tel reseau.
US20110182338A1 (en) * 2008-07-07 2011-07-28 Junqiang Li Co-channel interference and adjacent channel interference detection and suppression
TWI384816B (zh) * 2008-08-01 2013-02-01 Sunplus Technology Co Ltd For transmission parameter signaling (TPS) decoding systems in DTMB systems
US20100169037A1 (en) * 2008-12-29 2010-07-01 Texas Instruments Incorporated Flash memory threshold voltage characterization
US8693305B2 (en) * 2009-08-24 2014-04-08 Qualcomm Incorporated Method and apparatus for detecting OFDM signals in the presence of frequency orthogonal OFDM interferers
FR2954515B1 (fr) * 2009-12-23 2012-08-17 Thales Sa Procede et dispositif de goniometrie de signaux interferant un signal utile module par plusieurs porteuses.
FR2990090A1 (fr) * 2012-04-27 2013-11-01 France Telecom Procede de communication sans-fil avec un recepteur a antennes multiples

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2180175A5 (en) 1972-04-11 1973-11-23 Gaz De France Gas burner - producing a thin, very hot stream of a hot fluid
FR2715488B1 (fr) 1994-01-21 1996-03-22 Thomson Csf Procédé et dispositif permettant à un modem de se synchroniser sur un transmetteur de données numériques par voie hertzienne en présence de brouilleurs.
EP0931388B1 (en) * 1996-08-29 2003-11-05 Cisco Technology, Inc. Spatio-temporal processing for communication
US5886988A (en) * 1996-10-23 1999-03-23 Arraycomm, Inc. Channel assignment and call admission control for spatial division multiple access communication systems
US6335954B1 (en) * 1996-12-27 2002-01-01 Ericsson Inc. Method and apparatus for joint synchronization of multiple receive channels
KR100221336B1 (ko) * 1996-12-28 1999-09-15 전주범 직교 주파수 분할 다중화 수신 시스템의 프레임 동기 장치 및 그 방법
FR2764074B1 (fr) * 1997-06-03 1999-08-20 Thomson Csf Procede et dispositif de radiogoniometrie cooperative en transmission
FR2766320B1 (fr) * 1997-07-15 1999-10-15 Thomson Csf Procede et dispositif d'analyse des interferences dans un systeme de radiocommunication cellulaire
JP3609937B2 (ja) * 1998-03-20 2005-01-12 シャープ株式会社 受信機
JP3473393B2 (ja) * 1998-03-31 2003-12-02 株式会社豊田中央研究所 アダプティブ受信装置
US6795424B1 (en) * 1998-06-30 2004-09-21 Tellabs Operations, Inc. Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems
FR2805943B1 (fr) * 1999-09-14 2002-08-09 Inst Nat Sciences Appliq Procede d'egalisation dans des recepteurs utilisant une combinaison des techniques de modulations a porteuses multiples et a acces multiple par repartition de codes
US6377636B1 (en) * 1999-11-02 2002-04-23 Iospan Wirless, Inc. Method and wireless communications system using coordinated transmission and training for interference mitigation
JP3857009B2 (ja) * 2000-02-15 2006-12-13 三菱電機株式会社 マルチキャリア無線受信装置およびマルチキャリア無線伝送装置
FR2810175B1 (fr) 2000-06-09 2006-06-23 Thomson Csf Systemes et procedes de transmission numerique a codage espace-temps
JP4374764B2 (ja) * 2000-10-31 2009-12-02 株式会社デンソー アダプティブ受信機
JP2002185375A (ja) * 2000-12-13 2002-06-28 Nippon Soken Inc アダプティブアレーアンテナ
JP3576099B2 (ja) * 2000-12-22 2004-10-13 株式会社東芝 スマートアンテナを用いた受信装置、スマートアンテナを用いた受信方法及びビーム形成回路
JP2002232386A (ja) * 2001-01-30 2002-08-16 Sony Corp アダプティブアレーを用いたｏｆｄｍ受信装置
US7012966B2 (en) * 2001-05-21 2006-03-14 At&T Corp. Channel estimation for wireless systems with multiple transmit antennas
CN1205770C (zh) * 2001-08-29 2005-06-08 西安电子科技大学 一种适于数字地面广播的编码正交频分复用传输系统

Also Published As

Publication number Publication date
US7623579B2 (en) 2009-11-24
WO2004098140A1 (fr) 2004-11-11
CN1781292B (zh) 2012-04-18
KR101032284B1 (ko) 2011-05-06
JP4605797B2 (ja) 2011-01-05
FR2854290B1 (fr) 2005-08-26
JP2006524944A (ja) 2006-11-02
US20070058733A1 (en) 2007-03-15
CN1781292A (zh) 2006-05-31
HK1092616A1 (en) 2007-02-09
KR20060066669A (ko) 2006-06-16
FR2854290A1 (fr) 2004-10-29
AU2004234882A1 (en) 2004-11-11
AU2004234882B2 (en) 2009-07-02
EP1618715A1 (fr) 2006-01-25

Similar Documents

Publication Publication Date Title
BRPI0409726A (pt) método de demodulação de sinais do tipo ofdm na presença de fortes sinais de interferência co-canal
Zhao et al. Sensitivity to Doppler shift and carrier frequency errors in OFDM systems-the consequences and solutions
BRPI0507515A (pt) demodulação baseada em sub-banda utilizando transformada de fourier reduzida para um sistema de comunicação baseado em ofdm
ATE387769T1 (de) Zyklische verzögerungsdiversität zur verringerung der intersymbolinterferenz in ofdm-systemen
WO2011106626A3 (en) Blind timing synchronization and low complexity channel estimation in aco-ofdm systems
BR0100359A (pt) Construção, detecção e estimativa de sinal para sincronização de temporização de ligação ascendente e controle de acesso em um sistema de comunicação sem fio de acesso múltiplo
WO2002067527A3 (en) Multicarrier equalisation using multiplication by a leakage matrix
ATE491295T1 (de) Synchronisation in einem kohärenten ofdm empfänger
WO2006102771A8 (en) Methods and systems for ofdm using code division multiplexing
BRPI0519734A2 (pt) adaptaÇço de ganhos de subcanal de transmissço em um sistema com cancelamento de interferÊncia
BRPI0511810A (pt) sistema de modulação multiportadora com diversidade de retardo cìclico
BR9908302A (pt) Sistema de equalização e de sincronização de quadro ofdm
ATE367702T1 (de) Mehrträgerempfänger mit kanalschätzer
BR9806005A (pt) Transmissão de sinais digitais por multiplexação por divisão de frequência ortonogal
ATE453997T1 (de) Zeitbereichs-fenstertechnik und zwischen-träger- störungslöschung
KR970707663A (ko) 기호 처리가 향상된 전송 시스템(Transmission system with improved symbol processing)
NO20015489L (no) Estimering av amplitude og fase i et stöybeheftet kommunikasjonssystem
NO990777L (no) FremgangsmÕte for Õ oppdatere frekvensdomene utjevningsparametre, samt et kanalestimerings- og utjevningssystem
WO2007066973A3 (en) Apparatus and method for transmitting data using a plurality of carriers
TW200704046A (en) Timing corrections in a multi carrier system and propagation to a channel estimation time filter
BR112022022786A2 (pt) Projeto de preâmbulo de camada física
SE9700308D0 (sv) Förfarande och anordning i ett kommunikationssystem
ATE517493T1 (de) Verfahren und vorrichtung zur abschwächung der interferenz in mehrträger-modulationssystemen
BRPI0511591A (pt) método para processar sinais digitais codificados de ofdm, processador de sinal e receptor arranjados para receber sinais digitais codificados de ofdm, dispositivo móvel, e, sistema de telecomunicação
SE9904171D0 (sv) Multi-Carrier transmission system

Legal Events

Date Code Title Description
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements