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

    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • 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
    • 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
    • H04L27/2675—Pilot or known symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-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)
  • Small-Scale Networks (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (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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Also Published As

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

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