BR0210055A - Processo para sincronização no fluxo descendente de múltiplos usuários em um sistema ponto a multiponto com modulação ofdm - Google Patents

Processo para sincronização no fluxo descendente de múltiplos usuários em um sistema ponto a multiponto com modulação ofdm

Info

Publication number
BR0210055A
BR0210055A BR0210055-0A BR0210055A BR0210055A BR 0210055 A BR0210055 A BR 0210055A BR 0210055 A BR0210055 A BR 0210055A BR 0210055 A BR0210055 A BR 0210055A
Authority
BR
Brazil
Prior art keywords
synchronisation
point
users
ofdm modulation
determined
Prior art date
Application number
BR0210055-0A
Other languages
English (en)
Inventor
Juan Miguel Gavillero Martin
Juan Carlos Riveiro Insua
Salvador Iranzo Molinero
Nils Hakan Fouren
Francisco Javier Jime Marquina
Jorge Vicente Blasco Claret
Original Assignee
Dise O De Sist S En Silicio S
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 Dise O De Sist S En Silicio S filed Critical Dise O De Sist S En Silicio S
Publication of BR0210055A publication Critical patent/BR0210055A/pt

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/2605Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607Cyclic extensions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • H04L27/2613Structure of the reference signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2655Synchronisation arrangements
    • H04L27/2657Carrier synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2655Synchronisation arrangements
    • H04L27/2662Symbol synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2655Synchronisation arrangements
    • H04L27/2668Details of algorithms
    • H04L27/2673Details of algorithms characterised by synchronisation parameters
    • H04L27/2675Pilot or known symbols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5416Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals
    • H04L25/0228Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • H04L25/03159Arrangements for removing intersymbol interference operating in the frequency domain
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)
  • Radio Transmission System (AREA)

Abstract

"PROCESSO PARA SINCRONIZAçãO NO FLUXO DESCENDENTE DE MúLTIPLOS USUáRIOS EM UM SISTEMA PONTO A MULTIPONTO COM MODULAçãO OFDM". o sistema da presente invenção é aplicável à comunicação bi-direcional por rede elétrica e a uma pluralidade de usuários e permite a sincronização em tempo e freq³ência de múltiplos usuários em um sistema de comunicação OFDM multi-portador. O sistema se caracteriza pelo fato de consistir na geração de seq³ências de sincronização por meio de dois símbolos de sincronização idênticos que são periodicamente transmitidos no canal de fluxo descendente a partir da cabeça de rede para os usuários para estimar e corrigir a freq³ência de amostragem e simultaneamente estimar o momento no qual cada símbolo OFDM começa.
BR0210055-0A 2001-05-21 2002-05-17 Processo para sincronização no fluxo descendente de múltiplos usuários em um sistema ponto a multiponto com modulação ofdm BR0210055A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200101154A ES2188370B1 (es) 2001-05-21 2001-05-21 Procedimiento para la sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto a multipunto con modulacion ofdm.
PCT/ES2002/000234 WO2002095976A1 (es) 2001-05-21 2002-05-17 Procedimiento para la sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto a multipunto con modulacion ofdm

Publications (1)

Publication Number Publication Date
BR0210055A true BR0210055A (pt) 2004-08-17

Family

ID=8497781

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0210055-0A BR0210055A (pt) 2001-05-21 2002-05-17 Processo para sincronização no fluxo descendente de múltiplos usuários em um sistema ponto a multiponto com modulação ofdm

Country Status (16)

Country Link
US (1) US7423959B2 (pt)
EP (1) EP1389835B1 (pt)
JP (1) JP4044445B2 (pt)
KR (1) KR100768835B1 (pt)
CN (1) CN1528059A (pt)
AT (1) ATE377870T1 (pt)
AU (1) AU2002304581B2 (pt)
BR (1) BR0210055A (pt)
CA (1) CA2448106A1 (pt)
DE (1) DE60223356T2 (pt)
EA (1) EA005669B1 (pt)
ES (2) ES2188370B1 (pt)
IL (1) IL158758A0 (pt)
MX (1) MXPA03010658A (pt)
PT (1) PT1389835E (pt)
WO (1) WO2002095976A1 (pt)

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ES2221570B2 (es) * 2003-05-30 2005-10-01 Diseño De Sistemas En Silicio, S.A. Procedimiento de remuestreo en transmision y recepcion de una señal digital con traslacion en banda digital.
US7058378B2 (en) * 2003-11-18 2006-06-06 Interdigital Technology Corporation Method and apparatus for automatic frequency correction of a local oscilator with an error signal derived from an angle value of the conjugate product and sum of block correlator outputs
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KR101065687B1 (ko) * 2004-06-10 2011-09-19 엘지전자 주식회사 Ofdm 무선 통신 시스템에 적용되는 시간 동기 획득 방법
US7421013B1 (en) * 2004-08-02 2008-09-02 Marvell International Ltd. Maximum likelihood estimation of time and frequency offset for OFDM systems
EP1779570B1 (en) * 2004-08-17 2016-11-09 LG Electronics Inc. Method for detecting ofdm symbol timing in ofdm system
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CN100479445C (zh) * 2005-01-28 2009-04-15 北京大学 使用了前后缀信号的正交频分复用通信方法
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CN101911563B (zh) * 2008-01-30 2014-03-26 艾利森电话股份有限公司 适于所选调制旋转角度的数据调制方法
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CN101888354B (zh) * 2009-05-15 2013-06-05 中兴通讯股份有限公司 一种信道估计方法及装置
JP5237214B2 (ja) 2009-07-15 2013-07-17 株式会社日立製作所 送信装置、受信装置、または無線通信の処理方法
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Also Published As

Publication number Publication date
ES2188370A1 (es) 2003-06-16
IL158758A0 (en) 2004-05-12
KR100768835B1 (ko) 2007-10-19
PT1389835E (pt) 2008-02-14
DE60223356T2 (de) 2008-08-28
EA200301161A1 (ru) 2004-08-26
MXPA03010658A (es) 2004-03-02
EP1389835A1 (en) 2004-02-18
ATE377870T1 (de) 2007-11-15
DE60223356D1 (de) 2007-12-20
ES2296929T3 (es) 2008-05-01
KR20040008186A (ko) 2004-01-28
JP4044445B2 (ja) 2008-02-06
CN1528059A (zh) 2004-09-08
EP1389835B1 (en) 2007-11-07
CA2448106A1 (en) 2002-11-28
ES2188370B1 (es) 2004-10-16
WO2002095976A1 (es) 2002-11-28
US7423959B2 (en) 2008-09-09
EA005669B1 (ru) 2005-04-28
JP2004533768A (ja) 2004-11-04
AU2002304581B2 (en) 2008-01-03
US20040114551A1 (en) 2004-06-17

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