BRPI0413985A - sincronização em um sistema de broadcast ofdm utilizando pilotos multiplexados por divisão de tempo - Google Patents

sincronização em um sistema de broadcast ofdm utilizando pilotos multiplexados por divisão de tempo

Info

Publication number
BRPI0413985A
BRPI0413985A BRPI0413985-2A BRPI0413985A BRPI0413985A BR PI0413985 A BRPI0413985 A BR PI0413985A BR PI0413985 A BRPI0413985 A BR PI0413985A BR PI0413985 A BRPI0413985 A BR PI0413985A
Authority
BR
Brazil
Prior art keywords
pilot
tdm pilot
subbands
synchronization
time division
Prior art date
Application number
BRPI0413985-2A
Other languages
English (en)
Inventor
Funyun Ling
Alok Gupta
Raghuraman Krishnamoorthi
Ramaswamy Murali
Rajiv Vijayan
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BRPI0413985A publication Critical patent/BRPI0413985A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/76—Pilot transmitters or receivers for control of transmission or for equalising
    • 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
    • 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
    • H04L27/2662—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
    • H04L27/2662—Symbol synchronisation
    • H04L27/2665—Fine synchronisation, e.g. by positioning the FFT window
    • 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
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/003—Correction of carrier offset at baseband only
    • 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
    • H04L25/022—Channel estimation of frequency response
    • 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
    • H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

"SINCRONIZAçãO EM UM SISTEMA DE BROADCAST OFDM UTILIZANDO PILOTOS MULTIPLEXADOS POR DIVISãO DE TEMPO". Em um sistema OFDM, um transmissor difunde um primeiro piloto TDM através de um primeiro conjunto de sub-bandas seguido por um segundo piloto TDM através de um segundo conjunto de sub-bandas em cada quadro. As sub-bandas em cada conjunto são selecionadas dentre N sub-bandas totais de tal forma que (1) um símbolo OFDM para o primeiro piloto TDM contenha pelo menos S1 sequências idênticas de piloto-1 de comprimento L1 e (2) um símbolo OFDM para o segundo piloto TDM contenha pelo menos S2 seqüências idênticas de piloto-2 de comprimento L2, em que , , e. O transmissor 2 pode também difundir um piloto FDM. Um receptor processa o primeiro piloto TDM para obter a temporização de quadros (por exemplo, efetuando a correlação entre diferentes seqüências piloto-1) e também processa o segundo piloto TDM para obter a temporização de símbolos (por exemplo, pela detecção do início de uma estimativa de resposta de impulso de canal derivada a partir do segundo piloto TDM).
BRPI0413985-2A 2003-09-02 2004-09-01 sincronização em um sistema de broadcast ofdm utilizando pilotos multiplexados por divisão de tempo BRPI0413985A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49995103P 2003-09-02 2003-09-02
PCT/US2004/028577 WO2005022797A2 (en) 2003-09-02 2004-09-01 Synchronization in a broadcast ofdm system using time division multiplexed pilots

Publications (1)

Publication Number Publication Date
BRPI0413985A true BRPI0413985A (pt) 2006-11-14

Family

ID=34272892

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0413985-2A BRPI0413985A (pt) 2003-09-02 2004-09-01 sincronização em um sistema de broadcast ofdm utilizando pilotos multiplexados por divisão de tempo

Country Status (15)

Country Link
US (1) US20050063298A1 (pt)
EP (1) EP1661274A4 (pt)
JP (1) JP2007514331A (pt)
KR (1) KR101036778B1 (pt)
CN (1) CN1957551B (pt)
AR (1) AR046406A1 (pt)
AU (1) AU2004302854A1 (pt)
BR (1) BRPI0413985A (pt)
CA (1) CA2537267A1 (pt)
CL (1) CL2004002231A1 (pt)
IL (1) IL173979A (pt)
MX (1) MXPA06002397A (pt)
RU (1) RU2369016C2 (pt)
TW (1) TW200522573A (pt)
WO (1) WO2005022797A2 (pt)

Families Citing this family (128)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
US7339999B2 (en) * 2004-01-21 2008-03-04 Qualcomm Incorporated Pilot transmission and channel estimation for an OFDM system with excess delay spread
US8553822B2 (en) * 2004-01-28 2013-10-08 Qualcomm Incorporated Time filtering for excess delay mitigation in OFDM systems
US8433005B2 (en) * 2004-01-28 2013-04-30 Qualcomm Incorporated Frame synchronization and initial symbol timing acquisition system and method
US8724447B2 (en) * 2004-01-28 2014-05-13 Qualcomm Incorporated Timing estimation in an OFDM receiver
US20050163263A1 (en) * 2004-01-28 2005-07-28 Gupta Alok K. Systems and methods for frequency acquisition in a wireless communication network
ES2885101T3 (es) 2004-01-29 2021-12-13 Neo Wireless Llc Procedimientos y aparatos para superponer señales de espectro ensanchado de secuencia directa y de múltiples portadoras en un sistema de comunicación inalámbrica de banda ancha
US7457231B2 (en) * 2004-05-04 2008-11-25 Qualcomm Incorporated Staggered pilot transmission for channel estimation and time tracking
KR100754732B1 (ko) * 2004-06-03 2007-09-03 삼성전자주식회사 직교 주파수 분할 다중 이동 통신 시스템에서의 방송서비스를 위한 패킷 다중화 장치 및 방법
US8027372B2 (en) * 2004-06-18 2011-09-27 Qualcomm Incorporated Signal acquisition in a wireless communication system
US9137822B2 (en) 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
RU2375822C2 (ru) 2004-07-29 2009-12-10 Квэлкомм Инкорпорейтед Система и способ для разнесения во времени
US20070081484A1 (en) * 2004-07-29 2007-04-12 Wang Michael M Methods and apparatus for transmitting a frame structure in a wireless communication system
US9246728B2 (en) 2004-07-29 2016-01-26 Qualcomm Incorporated System and method for frequency diversity
US20090190675A1 (en) * 2004-08-31 2009-07-30 Qualcomm Incorporated Synchronization in a broadcast ofdm system using time division multiplexed pilots
CN100566317C (zh) * 2004-10-22 2009-12-02 财团法人工业技术研究院 基于频率相关性的相干正交频分复用接收器同步方法与装置
KR100640472B1 (ko) * 2004-11-29 2006-10-30 삼성전자주식회사 프레임 시작 추정 장치 및 방법
TWI297570B (en) * 2005-02-17 2008-06-01 Ind Tech Res Inst Symbol timing synchronization system for orthogonal frequency division multiplexing system
US9246560B2 (en) 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US8675631B2 (en) * 2005-03-10 2014-03-18 Qualcomm Incorporated Method and system for achieving faster device operation by logical separation of control information
US20060221810A1 (en) * 2005-03-10 2006-10-05 Bojan Vrcelj Fine timing acquisition
US20100157833A1 (en) * 2005-03-10 2010-06-24 Qualcomm Incorporated Methods and systems for improved timing acquisition for varying channel conditions
US8144824B2 (en) * 2005-03-10 2012-03-27 Qualcomm Incorporated Trend influenced time tracking
US7756005B2 (en) * 2005-03-11 2010-07-13 Qualcomm Incorporated Coarse timing/frame acquisition of OFDM system using time division multiplexed pilot symbol
US9154211B2 (en) 2005-03-11 2015-10-06 Qualcomm Incorporated Systems and methods for beamforming feedback in multi antenna communication systems
US8009775B2 (en) * 2005-03-11 2011-08-30 Qualcomm Incorporated Automatic frequency control for a wireless communication system with multiple subcarriers
US7742444B2 (en) * 2005-03-15 2010-06-22 Qualcomm Incorporated Multiple other sector information combining for power control in a wireless communication system
US8446892B2 (en) 2005-03-16 2013-05-21 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9461859B2 (en) 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9143305B2 (en) 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US8223623B2 (en) * 2005-03-28 2012-07-17 Qualcomm Incorporated Timing and frequency acquisition for OFDM systems
US9184870B2 (en) 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
US7609773B2 (en) * 2005-04-18 2009-10-27 Qualcomm Incorporated Method of determining the location of the FFT window and the delay spread for the platinum broadcast channel estimator
US9408220B2 (en) 2005-04-19 2016-08-02 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US9036538B2 (en) 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
CN1870465B (zh) 2005-05-24 2011-06-01 都科摩（北京）通信技术研究中心有限公司 循环训练序列的生成方法、通信系统和通信方法
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US8565194B2 (en) 2005-10-27 2013-10-22 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US8611284B2 (en) 2005-05-31 2013-12-17 Qualcomm Incorporated Use of supplemental assignments to decrement resources
US8462859B2 (en) 2005-06-01 2013-06-11 Qualcomm Incorporated Sphere decoding apparatus
US8599945B2 (en) 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US8730877B2 (en) * 2005-06-16 2014-05-20 Qualcomm Incorporated Pilot and data transmission in a quasi-orthogonal single-carrier frequency division multiple access system
US9055552B2 (en) * 2005-06-16 2015-06-09 Qualcomm Incorporated Quick paging channel with reduced probability of missed page
US8750908B2 (en) * 2005-06-16 2014-06-10 Qualcomm Incorporated Quick paging channel with reduced probability of missed page
US9179319B2 (en) 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
JP4841256B2 (ja) * 2005-06-28 2011-12-21 三洋電機株式会社 無線装置
CN101273582A (zh) 2005-07-27 2008-09-24 高通股份有限公司 用于仅前向链路协议族的系统和方法
US9391751B2 (en) 2005-07-29 2016-07-12 Qualcomm Incorporated System and method for frequency diversity
US9042212B2 (en) 2005-07-29 2015-05-26 Qualcomm Incorporated Method and apparatus for communicating network identifiers in a communication system
US8885628B2 (en) 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US20070041457A1 (en) 2005-08-22 2007-02-22 Tamer Kadous Method and apparatus for providing antenna diversity in a wireless communication system
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
EP1906572A4 (en) * 2005-08-22 2012-05-02 Panasonic Corp BASIC STATION EQUIPMENT AND MOBILE STATION EQUIPMENT
CN1801680A (zh) * 2005-08-23 2006-07-12 华为技术有限公司 基于交织频分多址的导频复用方法及其装置
US8644292B2 (en) 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
EP1924043B1 (en) * 2005-09-06 2014-06-18 Nippon Telegraph And Telephone Corporation Radio transmitting apparatus, radio receiving apparatus, radio transmitting method, radio receiving method, wireless communication system and wireless communication method
KR100729726B1 (ko) * 2005-09-14 2007-06-18 한국전자통신연구원 직교 주파수 분할 다중화 방식의 통신 시스템의 타이밍획득 및 반송파 주파수 오차 추정 장치 및 방법
BRPI0617044A2 (pt) * 2005-09-29 2011-07-12 Interdigital Tech Corp sistema de múltiplo acesso por divisão de freqüências e portadora única com base em formação de feixes mimo
US7590184B2 (en) 2005-10-11 2009-09-15 Freescale Semiconductor, Inc. Blind preamble detection for an orthogonal frequency division multiplexed sample stream
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US9225488B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US8477684B2 (en) 2005-10-27 2013-07-02 Qualcomm Incorporated Acknowledgement of control messages in a wireless communication system
US8045512B2 (en) 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9210651B2 (en) 2005-10-27 2015-12-08 Qualcomm Incorporated Method and apparatus for bootstraping information in a communication system
CN101347037A (zh) * 2005-10-27 2009-01-14 高通股份有限公司 用于在无线通信系统中的切换期间管理分配的方法和设备
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US9144060B2 (en) 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US20070147226A1 (en) * 2005-10-27 2007-06-28 Aamod Khandekar Method and apparatus for achieving flexible bandwidth using variable guard bands
US8582509B2 (en) 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US20070097935A1 (en) * 2005-10-27 2007-05-03 Alexei Gorokhov In-band rate control for an orthogonal frequency division multiple access communication system
US9088384B2 (en) * 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US20090207790A1 (en) * 2005-10-27 2009-08-20 Qualcomm Incorporated Method and apparatus for settingtuneawaystatus in an open state in wireless communication system
US9225416B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US7623607B2 (en) * 2005-10-31 2009-11-24 Qualcomm Incorporated Methods and apparatus for determining timing in a wireless communication system
US8582548B2 (en) 2005-11-18 2013-11-12 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
US7623599B2 (en) * 2005-11-21 2009-11-24 Freescale Semiconductor, Inc. Blind bandwidth detection for a sample stream
US7957341B2 (en) 2005-12-09 2011-06-07 Neocific, Inc. Frequency correction in a multi-carrier communication system
US8948329B2 (en) * 2005-12-15 2015-02-03 Qualcomm Incorporated Apparatus and methods for timing recovery in a wireless transceiver
US8130726B2 (en) * 2005-12-20 2012-03-06 Qualcomm Incorporated Coarse bin frequency synchronization in a communication system
US8472424B2 (en) * 2006-02-21 2013-06-25 Qualcomm Incorporated Method and apparatus for supporting multiple multiplexing schemes for wireless communication
US8689025B2 (en) * 2006-02-21 2014-04-01 Qualcomm Incorporated Reduced terminal power consumption via use of active hold state
US8077595B2 (en) 2006-02-21 2011-12-13 Qualcomm Incorporated Flexible time-frequency multiplexing structure for wireless communication
US9461736B2 (en) * 2006-02-21 2016-10-04 Qualcomm Incorporated Method and apparatus for sub-slot packets in wireless communication
US7675844B2 (en) * 2006-02-24 2010-03-09 Freescale Semiconductor, Inc. Synchronization for OFDM signals
KR100793789B1 (ko) * 2006-03-09 2008-01-11 엘지전자 주식회사 채널 추정 장치 및 채널 추정 방법
US9313064B2 (en) 2006-04-18 2016-04-12 Interdigital Technology Corporation Method and apparatus for synchronization in an OFDMA evolved UTRA wireless communication system
GB0609601D0 (en) * 2006-05-15 2006-06-21 Ttp Communications Ltd Timing errors
US8780936B2 (en) * 2006-05-22 2014-07-15 Qualcomm Incorporated Signal acquisition for wireless communication systems
US8738056B2 (en) * 2006-05-22 2014-05-27 Qualcomm Incorporation Signal acquisition in a wireless communication system
US8489133B2 (en) * 2006-06-09 2013-07-16 Nec Corporation Communication system, transmission device, reception device, and synchronization method
EP2039100B1 (en) * 2006-06-13 2011-05-25 Qualcomm Incorporated Preamble structure and acquisition for a wireless communication system
US8929353B2 (en) * 2007-05-09 2015-01-06 Qualcomm Incorporated Preamble structure and acquisition for a wireless communication system
BRPI0712926B1 (pt) * 2006-06-13 2019-11-12 Qualcomm Inc estrutura de preâmbulo e aquisição para um sistema de comunicação sem fio
JP2008035079A (ja) * 2006-07-27 2008-02-14 Toshiba Corp 無線通信システム、基地局、端末装置及び無線通信システムのパイロット信号制御方法
US20080025197A1 (en) * 2006-07-28 2008-01-31 Mccoy James W Estimating frequency error of a sample stream
US8243693B2 (en) * 2006-08-01 2012-08-14 Samsung Electronics Co., Ltd. Apparatus and method for broadcast pilot transmission in a wireless communication network
US8520606B2 (en) * 2006-10-23 2013-08-27 Samsung Electronics Co., Ltd Synchronous spectrum sharing based on OFDM/OFDMA signaling
KR101295570B1 (ko) 2006-10-27 2013-08-09 엘지전자 주식회사 무선 통신 시스템에서의 파일럿 신호 전송 방법
KR100822817B1 (ko) * 2006-10-31 2008-04-18 삼성전자주식회사 Ｏｆｄｍ 스킴에서 타이밍 동기화를 수행하기 위한 수신기및 방법
US7839831B2 (en) 2007-01-08 2010-11-23 Qualcomm Incorporated Methods and apparatus for time tracking using assistance from TDM pilots in a communication network
US8576774B2 (en) * 2007-01-15 2013-11-05 Koninklijke Philips N.V. Method of generating low peak-to-average power ratio (PAPR) binary preamble sequences for OFDM systems
US9577863B2 (en) * 2007-01-16 2017-02-21 Koninklijke Philips N.V. System and method for improved frequency/phase error tracking in high-speed high-frequency communication
KR20080105882A (ko) * 2007-06-01 2008-12-04 엘지전자 주식회사 데이터 전송 방법 및 데이터 수신 방법
US8311133B2 (en) * 2007-07-26 2012-11-13 Qualcomm Incorporated Method and apparatus for sensing signaling parameters in a wireless communications network
AU2007357234B2 (en) * 2007-08-02 2011-09-15 Fujitsu Limited Pilot arrangement method in mobile radio communication system and transmitter/receiver adopting same
DK2195986T3 (da) * 2007-09-18 2012-09-24 Lg Electronics Inc Fremgangsmåde og system til afsendelse og modtagelse af signaler
WO2009059250A2 (en) * 2007-10-31 2009-05-07 Qualcomm Incorporated Synchronization in a broadcast ofdm system using time division multiplexed pilots
US7652980B2 (en) * 2007-11-02 2010-01-26 Nokia Corporation Orthogonal frequency division multiplexing synchronization
DE102007053402A1 (de) * 2007-11-09 2009-05-14 Rohde & Schwarz Gmbh & Co. Kg Synchronisierung von Empfangssymbolen bei OFDM
WO2009104145A2 (en) * 2008-02-19 2009-08-27 Nxp B.V. Orthogonal frequency division multiplexing timing synchronization
US8885456B2 (en) * 2009-07-10 2014-11-11 Mitsubishi Electric Corporation Demodulator and frame synchronization method
US8290508B2 (en) * 2009-07-23 2012-10-16 Broadcom Corporation Estimating a subscriber location
US8750089B2 (en) * 2010-01-05 2014-06-10 Broadcom Corporation Method and system for iterative discrete fourier transform (DFT) based channel estimation using minimum mean square error (MMSE) techniques
US8724610B2 (en) * 2010-01-28 2014-05-13 Alcatel Lucent Interference reduction for wireless networks
RU2491717C2 (ru) * 2010-05-04 2013-08-27 Попик Павел Иванович Способ повышения уровня (отношения) сигнал-шум при применении "принципа затухания помехи"
US9479282B2 (en) * 2011-04-27 2016-10-25 Nippon Telegraph And Telephone Corporation Optical communication apparatus, optical route switching apparatus and network
CN102665267B (zh) * 2012-04-12 2015-12-16 华为技术有限公司 一种功率调整方法及装置
US20160057463A1 (en) * 2014-08-19 2016-02-25 Gatesair, Inc. Hybrid time-divisional multiplexed modulation
EP3437217A4 (en) 2016-03-29 2019-12-11 GatesAir, Inc. ADAPTIVE PROCESSING IN TIME MULTIPLEX SIGNALS
KR102205792B1 (ko) * 2016-03-31 2021-01-22 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 원격 측정 애플리케이션들에 대한 간섭에 강한 패킷 검출을 위한 최적화된 프리앰블 및 방법
CN109716813A (zh) * 2016-09-27 2019-05-03 三菱电机株式会社 基站、终端、无线通信系统和发送接收方法
US11444733B2 (en) * 2020-07-29 2022-09-13 Qualcomm Incorporated Pilot signaling supporting digital post-distortion (DPoD) techniques
US11881907B2 (en) * 2021-12-06 2024-01-23 Qualcomm Incorporated Frequency tracking loop pull-in range extension using frequency error wraparound detection and correction
CN119232338A (zh) * 2023-06-29 2024-12-31 中兴通讯股份有限公司 一种通信方法、通信装置及存储介质

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2989742B2 (ja) * 1994-05-20 1999-12-13 株式会社日立製作所 ディジタル放送システムおよび該ディジタル放送用の送信システムならびに該ディジタル放送用の受信システム
US5732113A (en) * 1996-06-20 1998-03-24 Stanford University Timing and frequency synchronization of OFDM signals
JP2772282B2 (ja) * 1996-07-01 1998-07-02 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伝送システムとその送受信装置
US6151295A (en) * 1998-02-26 2000-11-21 Wavesat Telecom Inc. OFDM receiving system
JP3423292B2 (ja) * 1998-05-13 2003-07-07 サムスン エレクトロニクス カンパニー リミテッド 基地局から伝送される信号を受信する移動局装置及び方法
KR100277761B1 (ko) * 1998-06-25 2001-01-15 윤종용 셀룰러 시스템에서 이동 단말기의 탐색 범위설정 방법
JP2000138647A (ja) * 1998-10-30 2000-05-16 Hitachi Denshi Ltd ディジタル伝送装置
WO2000030275A1 (en) * 1998-11-18 2000-05-25 Nokia Networks Oy A method for improved channel impulse response estimation in tdma systems
JP3686548B2 (ja) * 1999-05-19 2005-08-24 松下電器産業株式会社 送信装置及びｏｆｄｍシンボル生成方法
KR100335443B1 (ko) * 1999-06-15 2002-05-04 윤종용 직교주파수분할다중변조 신호의 심볼 타이밍 및 주파수 동기 장치 및 방법
FI19991871A7 (fi) * 1999-09-02 2001-03-03 Nokia Networks Oy Menetelmä signaalikomponenttien käsittelemiseksi kommunikaatiojärjestelmässä ja vastanotin
JP2001103033A (ja) * 1999-09-30 2001-04-13 Hitachi Denshi Ltd データ伝送装置
JP4193311B2 (ja) * 1999-11-26 2008-12-10 ソニー株式会社 通信システム及びその受信装置
US6597729B1 (en) * 2000-03-29 2003-07-22 Texas Instruments Incorporated Joint position and carrier frequency estimation method of initial frequency acquisition for a WCDMA mobile terminal
KR100358120B1 (ko) * 2000-10-20 2002-10-25 한국전자통신연구원 동일대역 인접채널 방식의 디지털 오디오 방송 전송 시스템
US7218691B1 (en) * 2001-03-05 2007-05-15 Marvell International Ltd. Method and apparatus for estimation of orthogonal frequency division multiplexing symbol timing and carrier frequency offset
JP3690293B2 (ja) * 2001-03-06 2005-08-31 株式会社日立製作所 マルチキャリア変調方式の同期方法
US7310304B2 (en) * 2001-04-24 2007-12-18 Bae Systems Information And Electronic Systems Integration Inc. Estimating channel parameters in multi-input, multi-output (MIMO) systems
KR100750105B1 (ko) * 2001-07-06 2007-08-21 삼성전자주식회사 지터의 영향을 받지 않는 심볼 타이밍 옵셋을 추정하는ｏｆｄｍ 수신 시스템 및 그 방법
US7548506B2 (en) * 2001-10-17 2009-06-16 Nortel Networks Limited System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design
US7054299B2 (en) * 2001-10-25 2006-05-30 Intel Corporation Method and apparatus of pilot signal synchronization verifier
US7359314B2 (en) * 2001-12-26 2008-04-15 Hitachi, Ltd. Signal transmission system for transmitting a signal with a guard interval and a demodulation method thereof
SG111072A1 (en) * 2002-07-03 2005-05-30 Oki Techno Ct Singapore Pte Receiver and method for wlan burst type signals
US6996189B1 (en) * 2002-07-26 2006-02-07 Jabil Circuit, Inc. Symmetric spherical QAM constellation
US7424067B2 (en) * 2002-10-21 2008-09-09 Stmicroelectronics N.V. Methods and apparatus for synchronization of training sequences
US20040223449A1 (en) * 2003-05-08 2004-11-11 Yih-Ming Tsuie Mode detection for OFDM signals
US7133457B2 (en) * 2003-06-27 2006-11-07 Texas Instruments Incorporated Joint timing recovery for multiple signal channels
US7221680B2 (en) * 2003-09-02 2007-05-22 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20050163263A1 (en) * 2004-01-28 2005-07-28 Gupta Alok K. Systems and methods for frequency acquisition in a wireless communication network
US8724447B2 (en) * 2004-01-28 2014-05-13 Qualcomm Incorporated Timing estimation in an OFDM receiver
US20090190675A1 (en) * 2004-08-31 2009-07-30 Qualcomm Incorporated Synchronization in a broadcast ofdm system using time division multiplexed pilots
GB2421317B (en) * 2004-12-15 2009-02-11 Agilent Technologies Inc A method and apparatus for detecting leading pulse edges

Also Published As

Publication number Publication date
KR101036778B1 (ko) 2011-05-25
EP1661274A2 (en) 2006-05-31
CN1957551A (zh) 2007-05-02
IL173979A0 (en) 2006-07-05
CN1957551B (zh) 2011-08-17
KR20060118429A (ko) 2006-11-23
RU2369016C2 (ru) 2009-09-27
CL2004002231A1 (es) 2005-06-03
AR046406A1 (es) 2005-12-07
WO2005022797A3 (en) 2006-12-28
CA2537267A1 (en) 2005-03-10
EP1661274A4 (en) 2009-06-17
RU2006110539A (ru) 2007-10-20
TW200522573A (en) 2005-07-01
AU2004302854A1 (en) 2005-03-10
US20050063298A1 (en) 2005-03-24
IL173979A (en) 2010-12-30
MXPA06002397A (es) 2006-06-20
WO2005022797A2 (en) 2005-03-10
JP2007514331A (ja) 2007-05-31

Similar Documents

Publication Publication Date Title
BRPI0413985A (pt) sincronização em um sistema de broadcast ofdm utilizando pilotos multiplexados por divisão de tempo
WO2009059249A3 (en) Synchronization in a broadcast ofdm system using time division multiplexed pilots
TW200705910A (en) Method for transmission of time division multiplexed pilot symbols to aid channel estimation, time synchronization, and AGC bootstrapping in a multicast wireless system
BR9908302A (pt) Sistema de equalização e de sincronização de quadro ofdm
BRPI0608285A2 (pt) sincronização de quadro em um sistema ofdm
BRPI0410232A (pt) salto de frequência rápido com um piloto multiplexado por divisão de código em um sistema ofdma
WO2007133890A3 (en) System, method and apparatus for determining if data arrived properly in tdm network
WO2010118305A3 (en) Method and apparatus for generating reference signals for accurate time-difference of arrival estimation
BR0010088A (pt) Método de estimação de canal usado em um sistema de rádio e receptor em um sistema de rádio
TW200704060A (en) Timing synchronization and channel estimation at a transition between local and wide area waveforms using a designated TDM pilot
WO2009016619A3 (en) Method, device and system for synchronization in wireless networks providing multicast/broadcast
WO2010046748A3 (en) Using the same multiplexed radio resource for pilot and information signals
BRPI0517013A (pt) multiplexação no tempo de sinais unicast e multicast em uma freqüência da portadora de downlink em um sistema de comunicação sem fio
EP1113607A3 (en) A cluster frame synchronization scheme for a satellite digital audio radio system
TW200708020A (en) Collection window positioning using time tracking information
BRPI0401013B1 (pt) Sistema de agrupamento remoto para a provisão de uma pluralidade de assentos de passageiro com serviços de passageiro em uma aeronave.
WO2008024822A3 (en) Apparatus and method of synchronizing distribution of packet services across a distributed network
MX2009012801A (es) Metodo y aparato para enviar una informacion de programacion para servicios de difusion y multidifusion en un sistema de comunicacion celular.
WO2007100982A3 (en) Synchronization for ofdm signals
WO2010024570A3 (en) Method of transmitting and receiving paging information
BRPI0800465A (pt) sistema de difusão de ip e multiplexador, aparelho de recepção e método usado em sistema de difusão de ip
WO2009059250A3 (en) Synchronization in a broadcast ofdm system using time division multiplexed pilots
WO2007067843A3 (en) Method and system for channel assignment of ofdm channels
BRPI0601955A (pt) aparelho e método para compartilhar um indentificador singular entre uma pluralidade de receptores
BR0015248A (pt) Transmissão de referência piloto sincronizada para um sistema de comunicação sem fio

Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2166 DE 10/07/2012.