ES2188370A1 - Procedimiento para la sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto a multipunto con modulacion ofdm. - Google Patents

Procedimiento para la sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto a multipunto con modulacion ofdm.

Info

Publication number
ES2188370A1
ES2188370A1 ES200101154A ES200101154A ES2188370A1 ES 2188370 A1 ES2188370 A1 ES 2188370A1 ES 200101154 A ES200101154 A ES 200101154A ES 200101154 A ES200101154 A ES 200101154A ES 2188370 A1 ES2188370 A1 ES 2188370A1
Authority
ES
Spain
Prior art keywords
synchronisation
point
users
ofdm modulation
downlink
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
ES200101154A
Other languages
English (en)
Other versions
ES2188370B1 (es
Inventor
Martin Juan Miguel Gavillero
Insua Juan Carlos Riveiro
Molinero Salvador Iranzo
Fouren Nils Hakan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MaxLinear Hispania SL
Original Assignee
Diseno de Sistemas en Silicio SA
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
Priority to ES200101154A priority Critical patent/ES2188370B1/es
Application filed by Diseno de Sistemas en Silicio SA filed Critical Diseno de Sistemas en Silicio SA
Priority to PT02732765T priority patent/PT1389835E/pt
Priority to DE60223356T priority patent/DE60223356T2/de
Priority to BR0210055-0A priority patent/BR0210055A/pt
Priority to AU2002304581A priority patent/AU2002304581B2/en
Priority to PCT/ES2002/000234 priority patent/WO2002095976A1/es
Priority to ES02732765T priority patent/ES2296929T3/es
Priority to EA200301161A priority patent/EA005669B1/ru
Priority to EP02732765A priority patent/EP1389835B1/en
Priority to KR1020037015198A priority patent/KR100768835B1/ko
Priority to CNA028141598A priority patent/CN1528059A/zh
Priority to AT02732765T priority patent/ATE377870T1/de
Priority to JP2002592319A priority patent/JP4044445B2/ja
Priority to IL15875802A priority patent/IL158758A0/xx
Priority to CA002448106A priority patent/CA2448106A1/en
Priority to MXPA03010658A priority patent/MXPA03010658A/es
Publication of ES2188370A1 publication Critical patent/ES2188370A1/es
Priority to US10/718,143 priority patent/US7423959B2/en
Application granted granted Critical
Publication of ES2188370B1 publication Critical patent/ES2188370B1/es
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)
  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

Procedimiento para la sincronización en el enlace descendente de múltiples usuarios en un sistema de transmisión punto a multipunto con modulación OFDM. Aplicable en la comunicación bidireccional a través de la red eléctrica entre una cabecera y una pluralidad de usuarios y permite la sincronización tanto en tiempo como en frecuencia de los múltiples usuarios en un sistema de comunicación multiportadora OFDM (multiplexación por división ortogonal en frecuencia). Se caracteriza, porque comprende generar secuencias de sincronismo mediante dos símbolos de sincronismo idénticos (16), que se transmiten periódicamente desde el equipo de cabecera por el enlace descendente a los usuarios, para estimar y corregir la frecuencia de muestreo y simultáneamente estimar el momento en que comienza cada símbolo OFDM.
ES200101154A 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. Expired - Fee Related ES2188370B1 (es)

Priority Applications (17)

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.
JP2002592319A JP4044445B2 (ja) 2001-05-21 2002-05-17 Ｏｆｄｍ変調を用いて１対多ポイントシステムにおける複数ユーザーの下流における同期の方法
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
AU2002304581A AU2002304581B2 (en) 2001-05-21 2002-05-17 Downlink synchronisation method for a point-to-multipoint system with OFDM modulation
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
ES02732765T ES2296929T3 (es) 2001-05-21 2002-05-17 Procedimiento par ala sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto amultipunto con modulacion ofdm.
EA200301161A EA005669B1 (ru) 2001-05-21 2002-05-17 Способ синхронизации передачи данных множеству пользователей в нисходящем канале многоточечной системы передачи данных с использованием очу-модуляции
EP02732765A EP1389835B1 (en) 2001-05-21 2002-05-17 Downlink synchronisation method for a point-to-multipoint system with ofdm modulation
PT02732765T PT1389835E (pt) 2001-05-21 2002-05-17 Processo de sincronização descendente para um sistema ponto amultiponto com modulação ofdm
CNA028141598A CN1528059A (zh) 2001-05-21 2002-05-17 在采用正交频分复用调制的点到多点系统中多个用户的下行流中实现同步的方法
AT02732765T ATE377870T1 (de) 2001-05-21 2002-05-17 Verfahren zur downlink synchronisation für ein punkt-zu-mehrpunkt-system mit ofdm-modulation
DE60223356T DE60223356T2 (de) 2001-05-21 2002-05-17 Verfahren zur downlink synchronisation für ein punkt-zu-mehrpunkt-system mit ofdm-modulation
IL15875802A IL158758A0 (en) 2001-05-21 2002-05-17 Process for synchronization in the downstream of multiple users in a point to multipoint system with ofdm modulation
CA002448106A CA2448106A1 (en) 2001-05-21 2002-05-17 Process for synchronization in the downstream of multiple users in a point to multipoint system with ofdm modulation
MXPA03010658A MXPA03010658A (es) 2001-05-21 2002-05-17 Procedimiento paraq la sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto multipunto con modulacion ofd.
KR1020037015198A KR100768835B1 (ko) 2001-05-21 2002-05-17 Ｏｆｄｍ 변조에 의한 포인트 투 멀티포인트 시스템에 있어서의 다중 유저의 하향에서의 동기화 방법
US10/718,143 US7423959B2 (en) 2001-05-21 2003-11-20 Process for synchronization in the downstream of multiple users in a point multipoint system with OFDM modulation

Applications Claiming Priority (1)

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.

Publications (2)

Publication Number Publication Date
ES2188370A1 true ES2188370A1 (es) 2003-06-16
ES2188370B1 ES2188370B1 (es) 2004-10-16

Family

ID=8497781

Family Applications (2)

Application Number Title Priority Date Filing Date
ES200101154A Expired - Fee Related 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.
ES02732765T Expired - Lifetime ES2296929T3 (es) 2001-05-21 2002-05-17 Procedimiento par ala sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto amultipunto con modulacion ofdm.

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES02732765T Expired - Lifetime ES2296929T3 (es) 2001-05-21 2002-05-17 Procedimiento par ala sincronizacion en el enlace descendente de multiples usuarios en un sistema de transmision punto amultipunto con modulacion ofdm.

Country Status (16)

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

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2212744B2 (es) * 2003-01-10 2005-03-16 Diseño De Sistemas En Silicio, S.A. Procedimiento de sincronizacion en el dominio del tiempo y de la frecuencia de multiples equipos en un sistema de transmision con modulacion ofdm.
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
JP4290048B2 (ja) * 2004-03-23 2009-07-01 三洋電機株式会社 受信方法および装置
WO2005114858A1 (en) * 2004-05-21 2005-12-01 Koninklijke Philips Electronics, N.V. A transmitter and receiver for ultra-wideband ofdm signals employing a low-complexity cdma layer for bandwidth expansion
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
WO2006019255A1 (en) * 2004-08-17 2006-02-23 Lg Electronics Inc. Method for detecting ofdm symbol timing in ofdm system
KR100587310B1 (ko) * 2004-08-18 2006-06-08 엘지전자 주식회사 주파수 동기 장치 및 이를 적용한 ｄｖｂ-ｈ 수신 시스템
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
US7778336B1 (en) 2005-02-09 2010-08-17 Marvell International Ltd. Timing and frequency synchronization of OFDM signals for changing channel conditions
JP4440831B2 (ja) * 2005-06-14 2010-03-24 株式会社エヌ・ティ・ティ・ドコモ 基地局装置、送信方法及び通信システム
US8315191B2 (en) * 2005-09-20 2012-11-20 Qualcomm Incorporated Timing acquisition and mode and guard detection for an OFDM transmission
US7894417B2 (en) * 2005-11-01 2011-02-22 Nokia Corporation Signal arrangement for multi-bandwidth OFDM system
US8130629B2 (en) * 2005-11-25 2012-03-06 Go Net Systems Ltd Simultaneous simulcast and single cast hybrid multi-tone communication system
US7512113B2 (en) * 2005-12-21 2009-03-31 Motorola, Inc. Method and system for determining a minimum time of flight of a radio frequency transmission
US7769119B2 (en) 2006-09-27 2010-08-03 Sandbridge Technologies, Inc. Method of initial synchronization of a communication signal
CN100562001C (zh) * 2007-05-30 2009-11-18 北京中星微电子有限公司 确定正交频分复用系统导频位置的方法、装置及解调设备
CN101374129B (zh) * 2007-08-20 2012-01-11 中兴通讯股份有限公司 基于正交频分复用的同步序列生成方法、同步方法及系统
EP2079212A1 (en) * 2008-01-11 2009-07-15 Sandbridge Technologies, Inc. A method of initial synchronization of a communication signal
CN101933300A (zh) * 2008-01-30 2010-12-29 艾利森电话股份有限公司 使用不平衡qpsk调制的时隙共享
EP2235866B1 (en) * 2008-01-30 2014-02-26 Telefonaktiebolaget LM Ericsson (publ) A method of data modulation adapted to selected modulation rotational angle
CN101953127B (zh) * 2008-01-30 2013-09-25 艾利森电话股份有限公司 适于使用来自两个子信道的训练序列来估计符号星座的muros的接收机
CN101926108B (zh) * 2008-01-30 2014-05-14 艾利森电话股份有限公司 重用一个时隙的无线系统中的报告机制
US8509208B2 (en) * 2008-02-01 2013-08-13 Qualcomm Incorporated Frequency error estimation
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
US8625689B2 (en) * 2010-07-09 2014-01-07 Texas Instruments Incorporated Time-domain link adaptation
US8548096B2 (en) * 2010-12-31 2013-10-01 Telefonaktiebolaget L M Ericsson (Publ) Controllable frequency offset for inphase and Quadrature (IQ) imbalance estimation
CN103236914B (zh) * 2013-04-16 2016-02-03 深圳市力合微电子股份有限公司 一种电力线载波通信系统的同步信号生成方法及装置
CN103580718B (zh) * 2013-10-15 2015-06-10 北京航天科工世纪卫星科技有限公司 一种低信噪比下的快速时频同步方法
WO2016045704A1 (en) 2014-09-23 2016-03-31 Huawei Technologies Co.,Ltd Transmitter, receiver and methods for transmitting/ receiving synchronisation signals
US9559815B1 (en) * 2015-08-26 2017-01-31 Friskydsp Technology Ltd. Generation of OFDM symbols
US11051263B2 (en) * 2017-06-15 2021-06-29 Qualcomm Incorporated Synchronization channel and system acquisition for internet of things communications in a shared spectrum
EP3481020B1 (de) 2017-11-07 2021-09-01 Siemens Aktiengesellschaft Verfahren zur synchronisation von sende- und empfangseinheiten bei mehrträgersignalübertragung
JP6559763B2 (ja) * 2017-12-14 2019-08-14 ホアウェイ・テクノロジーズ・カンパニー・リミテッド 送信機、受信機、および同期信号を送信／受信するための方法
CN111970063B (zh) * 2020-08-26 2022-04-29 北京字节跳动网络技术有限公司 一种通信方法、装置、设备和存储介质

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1075103A1 (en) * 1999-02-19 2001-02-07 Mitsubishi Denki Kabushiki Kaisha Communication device and communication method
WO2001028146A1 (en) * 1999-10-12 2001-04-19 Itran Communications Ltd. Apparatus for and method of adaptive synchronization in a spread spectrum communications receiver

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2774961B2 (ja) 1996-03-29 1998-07-09 株式会社次世代デジタルテレビジョン放送システム研究所 Ｏｆｄｍ復調装置
US5732113A (en) * 1996-06-20 1998-03-24 Stanford University Timing and frequency synchronization of OFDM signals
US6519291B1 (en) 1998-02-03 2003-02-11 Lucent Technologies Inc. Reduction of interference in discrete multi-tone (DMT) based communications systems
US6876675B1 (en) * 1998-02-06 2005-04-05 Cisco Technology, Inc. Synchronization in OFDM systems
JP3606761B2 (ja) 1998-11-26 2005-01-05 松下電器産業株式会社 Ｏｆｄｍ受信装置
KR100335443B1 (ko) 1999-06-15 2002-05-04 윤종용 직교주파수분할다중변조 신호의 심볼 타이밍 및 주파수 동기 장치 및 방법
US6985432B1 (en) * 2000-01-28 2006-01-10 Zion Hadad OFDM communication channel
JP2001111518A (ja) * 1999-10-04 2001-04-20 Mitsubishi Electric Corp 通信方法および通信装置
US6526295B1 (en) 1999-10-14 2003-02-25 Ericsson Inc. Power conservation method in mobile communications device
US6628735B1 (en) * 1999-12-22 2003-09-30 Thomson Licensing S.A. Correction of a sampling frequency offset in an orthogonal frequency division multiplexing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1075103A1 (en) * 1999-02-19 2001-02-07 Mitsubishi Denki Kabushiki Kaisha Communication device and communication method
WO2001028146A1 (en) * 1999-10-12 2001-04-19 Itran Communications Ltd. Apparatus for and method of adaptive synchronization in a spread spectrum communications receiver

Also Published As

Publication number Publication date
US20040114551A1 (en) 2004-06-17
ES2188370B1 (es) 2004-10-16
DE60223356D1 (de) 2007-12-20
JP2004533768A (ja) 2004-11-04
EA200301161A1 (ru) 2004-08-26
PT1389835E (pt) 2008-02-14
WO2002095976A1 (es) 2002-11-28
EA005669B1 (ru) 2005-04-28
CA2448106A1 (en) 2002-11-28
MXPA03010658A (es) 2004-03-02
US7423959B2 (en) 2008-09-09
BR0210055A (pt) 2004-08-17
IL158758A0 (en) 2004-05-12
CN1528059A (zh) 2004-09-08
KR20040008186A (ko) 2004-01-28
EP1389835B1 (en) 2007-11-07
ES2296929T3 (es) 2008-05-01
EP1389835A1 (en) 2004-02-18
KR100768835B1 (ko) 2007-10-19
AU2002304581B2 (en) 2008-01-03
ATE377870T1 (de) 2007-11-15
DE60223356T2 (de) 2008-08-28
JP4044445B2 (ja) 2008-02-06

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