IL158758A0 - Process for synchronization in the downstream of multiple users in a point to multipoint system with ofdm modulation - Google Patents
Process for synchronization in the downstream of multiple users in a point to multipoint system with ofdm modulationInfo
- Publication number
- IL158758A0 IL158758A0 IL15875802A IL15875802A IL158758A0 IL 158758 A0 IL158758 A0 IL 158758A0 IL 15875802 A IL15875802 A IL 15875802A IL 15875802 A IL15875802 A IL 15875802A IL 158758 A0 IL158758 A0 IL 158758A0
- Authority
- IL
- Israel
- Prior art keywords
- multiple users
- users
- synchronisation
- synchronization
- downstream
- Prior art date
Links
Classifications
-
- 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
- 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
- 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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Radio Transmission System (AREA)
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 |
---|---|
IL158758A0 true IL158758A0 (en) | 2004-05-12 |
Family
ID=8497781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Country Status (16)
Country | Link |
---|---|
US (1) | US7423959B2 (xx) |
EP (1) | EP1389835B1 (xx) |
JP (1) | JP4044445B2 (xx) |
KR (1) | KR100768835B1 (xx) |
CN (1) | CN1528059A (xx) |
AT (1) | ATE377870T1 (xx) |
AU (1) | AU2002304581B2 (xx) |
BR (1) | BR0210055A (xx) |
CA (1) | CA2448106A1 (xx) |
DE (1) | DE60223356T2 (xx) |
EA (1) | EA005669B1 (xx) |
ES (2) | ES2188370B1 (xx) |
IL (1) | IL158758A0 (xx) |
MX (1) | MXPA03010658A (xx) |
PT (1) | PT1389835E (xx) |
WO (1) | WO2002095976A1 (xx) |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
EP1779570B1 (en) * | 2004-08-17 | 2016-11-09 | 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 |
EP2235855B1 (en) * | 2008-01-30 | 2015-01-07 | Telefonaktiebolaget LM Ericsson (publ) | Report mechanism in a radio system reusing one time-slot |
US8848683B2 (en) * | 2008-01-30 | 2014-09-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of data modulation adapted to selected modulation rotational angle |
KR101421776B1 (ko) * | 2008-01-30 | 2014-07-22 | 텔레폰악티에볼라겟엘엠에릭슨(펍) | 비평형 qpsk 변조를 사용하는 타임슬롯 공유 |
EP2235896B1 (en) * | 2008-01-30 | 2013-03-27 | Telefonaktiebolaget LM Ericsson (publ) | A receiver for muros adapted to estimate symbol constellation using training sequences from two sub-channels |
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 |
EP3036844B1 (en) | 2014-09-23 | 2021-12-29 | 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 |
ES2895680T3 (es) * | 2017-11-07 | 2022-02-22 | Siemens Ag | Procedimiento para la sincronización de unidades emisoras y receptoras en una transmisión de señales multiportadora |
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 |
Family Cites Families (12)
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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 |
JP3279277B2 (ja) * | 1999-02-19 | 2002-04-30 | 三菱電機株式会社 | マルチキャリア通信方法およびマルチキャリア通信装置 |
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 |
US6614864B1 (en) * | 1999-10-12 | 2003-09-02 | Itran Communications Ltd. | Apparatus for and method of adaptive synchronization in a spread spectrum communications receiver |
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 |
-
2001
- 2001-05-21 ES ES200101154A patent/ES2188370B1/es not_active Expired - Fee Related
-
2002
- 2002-05-17 AU AU2002304581A patent/AU2002304581B2/en not_active Ceased
- 2002-05-17 DE DE60223356T patent/DE60223356T2/de not_active Expired - Fee Related
- 2002-05-17 ES ES02732765T patent/ES2296929T3/es not_active Expired - Lifetime
- 2002-05-17 PT PT02732765T patent/PT1389835E/pt unknown
- 2002-05-17 BR BR0210055-0A patent/BR0210055A/pt not_active IP Right Cessation
- 2002-05-17 CN CNA028141598A patent/CN1528059A/zh active Pending
- 2002-05-17 CA CA002448106A patent/CA2448106A1/en not_active Abandoned
- 2002-05-17 EP EP02732765A patent/EP1389835B1/en not_active Expired - Lifetime
- 2002-05-17 MX MXPA03010658A patent/MXPA03010658A/es active IP Right Grant
- 2002-05-17 JP JP2002592319A patent/JP4044445B2/ja not_active Expired - Fee Related
- 2002-05-17 KR KR1020037015198A patent/KR100768835B1/ko not_active IP Right Cessation
- 2002-05-17 AT AT02732765T patent/ATE377870T1/de not_active IP Right Cessation
- 2002-05-17 WO PCT/ES2002/000234 patent/WO2002095976A1/es active IP Right Grant
- 2002-05-17 IL IL15875802A patent/IL158758A0/xx unknown
- 2002-05-17 EA EA200301161A patent/EA005669B1/ru not_active IP Right Cessation
-
2003
- 2003-11-20 US US10/718,143 patent/US7423959B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1528059A (zh) | 2004-09-08 |
ES2188370B1 (es) | 2004-10-16 |
EP1389835A1 (en) | 2004-02-18 |
US20040114551A1 (en) | 2004-06-17 |
ATE377870T1 (de) | 2007-11-15 |
KR20040008186A (ko) | 2004-01-28 |
EP1389835B1 (en) | 2007-11-07 |
CA2448106A1 (en) | 2002-11-28 |
BR0210055A (pt) | 2004-08-17 |
DE60223356D1 (de) | 2007-12-20 |
WO2002095976A1 (es) | 2002-11-28 |
AU2002304581B2 (en) | 2008-01-03 |
KR100768835B1 (ko) | 2007-10-19 |
PT1389835E (pt) | 2008-02-14 |
MXPA03010658A (es) | 2004-03-02 |
DE60223356T2 (de) | 2008-08-28 |
EA200301161A1 (ru) | 2004-08-26 |
ES2296929T3 (es) | 2008-05-01 |
EA005669B1 (ru) | 2005-04-28 |
JP2004533768A (ja) | 2004-11-04 |
JP4044445B2 (ja) | 2008-02-06 |
ES2188370A1 (es) | 2003-06-16 |
US7423959B2 (en) | 2008-09-09 |
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