ATE428247T1 - Gestufte pilotenubertragung zur kanalschatzung und zeitverfolgung - Google Patents

Gestufte pilotenubertragung zur kanalschatzung und zeitverfolgung

Info

Publication number
ATE428247T1
ATE428247T1 AT05739529T AT05739529T ATE428247T1 AT E428247 T1 ATE428247 T1 AT E428247T1 AT 05739529 T AT05739529 T AT 05739529T AT 05739529 T AT05739529 T AT 05739529T AT E428247 T1 ATE428247 T1 AT E428247T1
Authority
AT
Austria
Prior art keywords
subbands
impulse response
pilot
groups
different
Prior art date
Application number
AT05739529T
Other languages
English (en)
Inventor
Rajiv Vijayan
Ashok Mantravadi
Krishna Kiran Mukkavilli
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
Application granted granted Critical
Publication of ATE428247T1 publication Critical patent/ATE428247T1/de

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
    • 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
    • H04L23/00—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00
    • H04L23/02—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00 adapted for orthogonal signalling
    • 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
    • H04L25/0212—Channel estimation of impulse response
    • 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
    • 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
    • H04L27/2647—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
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Radio Relay Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
AT05739529T 2004-05-04 2005-04-25 Gestufte pilotenubertragung zur kanalschatzung und zeitverfolgung ATE428247T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56832404P 2004-05-04 2004-05-04
US10/926,884 US7457231B2 (en) 2004-05-04 2004-08-25 Staggered pilot transmission for channel estimation and time tracking

Publications (1)

Publication Number Publication Date
ATE428247T1 true ATE428247T1 (de) 2009-04-15

Family

ID=34966816

Family Applications (1)

Application Number Title Priority Date Filing Date
AT05739529T ATE428247T1 (de) 2004-05-04 2005-04-25 Gestufte pilotenubertragung zur kanalschatzung und zeitverfolgung

Country Status (12)

Country Link
US (2) US7457231B2 (de)
EP (2) EP2066088A1 (de)
JP (3) JP5048481B2 (de)
KR (2) KR100878430B1 (de)
CN (1) CN1981498B (de)
AT (1) ATE428247T1 (de)
CA (2) CA2699640C (de)
DE (1) DE602005013765D1 (de)
ES (1) ES2322077T3 (de)
PL (1) PL1745618T3 (de)
TW (1) TWI361600B (de)
WO (1) WO2005112378A1 (de)

Families Citing this family (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8599764B2 (en) * 2003-09-02 2013-12-03 Qualcomm Incorporated Transmission of overhead information for reception of multiple data streams
US8509051B2 (en) * 2003-09-02 2013-08-13 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US8477809B2 (en) 2003-09-02 2013-07-02 Qualcomm Incorporated Systems and methods for generalized slot-to-interlace mapping
US7221680B2 (en) 2003-09-02 2007-05-22 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US8526412B2 (en) * 2003-10-24 2013-09-03 Qualcomm Incorporated Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system
US7660275B2 (en) * 2003-10-24 2010-02-09 Qualcomm Incorporated Local and wide-area transmissions in a wireless broadcast network
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
US7418046B2 (en) * 2004-07-22 2008-08-26 Qualcomm Inc. Pilot transmission and channel estimation for multiple transmitters
US8135088B2 (en) * 2005-03-07 2012-03-13 Q1UALCOMM Incorporated Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing
US20100157833A1 (en) * 2005-03-10 2010-06-24 Qualcomm Incorporated Methods and systems for improved timing acquisition for varying channel conditions
US8175123B2 (en) * 2005-03-10 2012-05-08 Qualcomm Incorporated Collection window positioning using time tracking information
US8428001B2 (en) * 2005-03-10 2013-04-23 Qualcomm Incorporated Timing corrections in a multi carrier system and propagation to a channel estimation time filter
US8675631B2 (en) * 2005-03-10 2014-03-18 Qualcomm Incorporated Method and system for achieving faster device operation by logical separation of control information
US7742444B2 (en) 2005-03-15 2010-06-22 Qualcomm Incorporated Multiple other sector information combining for power control in a wireless communication system
US7848463B2 (en) * 2005-04-07 2010-12-07 Qualcomm Incorporated Adaptive time-filtering for channel estimation in OFDM system
US8126066B2 (en) * 2005-06-09 2012-02-28 Telefonaktiebolaget Lm Ericsson (Publ) Time and frequency channel estimation
US8750908B2 (en) 2005-06-16 2014-06-10 Qualcomm Incorporated Quick paging channel with reduced probability of missed page
US9055552B2 (en) 2005-06-16 2015-06-09 Qualcomm Incorporated Quick paging channel with reduced probability of missed page
US7508842B2 (en) 2005-08-18 2009-03-24 Motorola, Inc. Method and apparatus for pilot signal transmission
US8155105B2 (en) * 2005-09-22 2012-04-10 Rsi Video Technologies, Inc. Spread spectrum wireless communication and monitoring arrangement and method
WO2007050911A1 (en) 2005-10-27 2007-05-03 Qualcomm Incorporated A method and apparatus for transmitting and receiving access grant block over f-ssch in wireless communication system
US20090207790A1 (en) 2005-10-27 2009-08-20 Qualcomm Incorporated Method and apparatus for settingtuneawaystatus in an open state in wireless communication system
US7623607B2 (en) * 2005-10-31 2009-11-24 Qualcomm Incorporated Methods and apparatus for determining timing in a wireless communication system
US7733983B2 (en) * 2005-11-14 2010-06-08 Ibiquity Digital Corporation Symbol tracking for AM in-band on-channel radio receivers
US7711029B2 (en) * 2005-12-02 2010-05-04 Telefonaktiebolaget Lm Ericsson (Publ) Hopping pilot pattern for telecommunications
US8948329B2 (en) * 2005-12-15 2015-02-03 Qualcomm Incorporated Apparatus and methods for timing recovery in a wireless transceiver
EP1968224B1 (de) * 2005-12-28 2016-07-20 Fujitsu Limited Komunikationsvorrichtung und kanalschätzverfahren
JP4347300B2 (ja) 2006-01-17 2009-10-21 株式会社エヌ・ティ・ティ・ドコモ 送信装置および送信方法
US7822156B2 (en) * 2006-06-01 2010-10-26 Realtek Semiconductor Corp Channel estimation
US20070297497A1 (en) * 2006-06-21 2007-12-27 Seibert Cristina A Apparatus And Method For Interference Cancellation
KR101225649B1 (ko) 2006-07-25 2013-01-23 뉴저지 인스티튜트 오브 테크놀로지 다중 안테나 통신시스템의 채널추정 장치 및 방법
JP5074501B2 (ja) * 2006-09-11 2012-11-14 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 時間−周波数ホッピング・パターンの検出
JP4215084B2 (ja) * 2006-09-13 2009-01-28 沖電気工業株式会社 等化器及び等化方法
JP4340679B2 (ja) * 2006-10-31 2009-10-07 Ｏｋｉセミコンダクタ株式会社 等化器
US8036190B2 (en) * 2007-02-27 2011-10-11 Industrial Technology Research Institute Methods and devices for allocating data in a wireless communication system
US8098567B2 (en) * 2007-03-05 2012-01-17 Qualcomm Incorporated Timing adjustments for channel estimation in a multi carrier system
US20080219332A1 (en) * 2007-03-05 2008-09-11 Qualcomm Incorporated Apparatus and methods accounting for automatic gain control in a multi carrier system
EP2028785A3 (de) * 2007-07-26 2009-06-24 Qualcomm Incorporated Systeme und Verfahren zur verallgemeinerten Abbildung von Zeitschlitzen auf Verschachtelungen
US20090175210A1 (en) * 2007-07-26 2009-07-09 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
TWI395447B (zh) * 2007-08-06 2013-05-01 Qualcomm Inc 用於一般化之時槽至交錯映射的方法及系統
WO2009045135A1 (en) * 2007-10-04 2009-04-09 Telefonaktiebolaget Lm Ericsson (Publ) Pilot design for tdd ofdm systems
US8194807B2 (en) 2007-11-01 2012-06-05 Nxp B.V. Method to discriminate a real echo peak from an aliased echo peak
CN101350801B (zh) * 2008-03-20 2012-10-10 中兴通讯股份有限公司 长循环前缀帧结构下行专用导频与物理资源块的映射方法
US20090245154A1 (en) * 2008-03-28 2009-10-01 Qualcomm Incorporated Signaling parameters channel processing
US8811331B2 (en) * 2008-04-10 2014-08-19 Telefonaktiebolaget L M Ericsson (Publ) Pilot design using costas arrays
US8174958B2 (en) 2008-08-01 2012-05-08 Broadcom Corporation Method and system for a reference signal (RS) timing loop for OFDM symbol synchronization and tracking
US8559296B2 (en) 2008-08-01 2013-10-15 Broadcom Corporation Method and system for an OFDM joint timing and frequency tracking system
US20100118033A1 (en) * 2008-11-10 2010-05-13 Vistaprint Technologies Limited Synchronizing animation to a repetitive beat source
CN101437010B (zh) * 2008-12-03 2012-10-03 华为终端有限公司 一种正交频分复用系统信道估计方法和装置
JP5377516B2 (ja) * 2008-12-22 2013-12-25 株式会社日立製作所 信号配置方法及び通信装置
TWI403119B (zh) * 2009-01-23 2013-07-21 Univ Nat Sun Yat Sen 用於正交分頻多工系統之多用戶資料封包排列方法
US20100220651A1 (en) * 2009-03-02 2010-09-02 Mediatek Inc. Method and apparatus for broadcasting and receiving system information in OFDMA systems
US9049065B2 (en) 2009-05-11 2015-06-02 Qualcomm Incorporated Removal of ICI/ISI errors in frequency domain channel estimation for wireless repeaters
US8611227B2 (en) 2009-05-11 2013-12-17 Qualcomm Incorporated Channel estimate pruning in presence of large signal dynamics in an interference cancellation repeater
JP5198367B2 (ja) * 2009-06-18 2013-05-15 株式会社エヌ・ティ・ティ・ドコモ 送信装置、送信方法、ユーザ装置及び通信方法
CN101938435B (zh) * 2009-06-30 2013-03-20 中兴通讯股份有限公司 一种正交频分复用系统的时偏估计装置及方法
CN102202029B (zh) 2010-03-24 2015-01-28 中兴通讯股份有限公司 正交频分复用系统中的信道估计方法及装置
US8494070B2 (en) * 2010-05-12 2013-07-23 Qualcomm Incorporated Channel impulse response (CIR)-based and secondary synchronization channel (SSC)-based (frequency tracking loop (FTL)/time tracking loop (TTL)/channel estimation
EP2580930A4 (de) * 2010-06-09 2015-12-02 Entropic Communications Inc Präambelreduzierungsverfahren und -vorrichtung
US9078205B2 (en) * 2012-03-09 2015-07-07 Qualcomm Incorporated Methods and apparatus for enabling non-destaggered channel estimation
KR101903375B1 (ko) 2012-12-13 2018-11-07 삼성전자주식회사 복수의 수신 안테나들을 포함하는 통신 시스템 및 그 통신 시스템의 타임 트래킹 방법
WO2016010291A1 (ko) * 2014-07-15 2016-01-21 엘지전자 주식회사 Mimo 수신기가 re 그룹 단위로 복수의 레이어를 정렬하여 수신 신호를 처리하는 방법
KR102190919B1 (ko) * 2014-09-11 2020-12-14 삼성전자주식회사 시분할 듀플렉싱 코드 분할 다중 접속 방식을 지원하는 통신 시스템에서 신호 검출 장치 및 방법
US9755714B2 (en) 2014-12-24 2017-09-05 Collision Communications, Inc. Method and system for compressed sensing joint channel estimation in an LTE cellular communications network
GB2539130B (en) * 2015-06-04 2017-10-25 Imagination Tech Ltd Channel centering at an OFDM receiver
US10516449B2 (en) * 2015-07-14 2019-12-24 Commonwealth Scientific And Industrial Research Organisation Multi-user MIMO-OFDM system
KR102403502B1 (ko) * 2015-10-13 2022-05-30 삼성전자 주식회사 무선 통신 시스템에서 채널 상태 추정 방법 및 장치
US11419134B2 (en) 2016-03-25 2022-08-16 Lg Electronics Inc. Method for transmitting and receiving uplink signal in wireless communication system supporting non-licensed band, and apparatus for supporting same
US10813014B2 (en) * 2017-03-24 2020-10-20 Telefonaktiebolaget Lm Ericsson (Publ) Receiving a periodic, wideband synchronization signal in a narrowband receiver
MX2019011120A (es) 2017-03-24 2019-11-12 Ericsson Telefon Ab L M Deteccion de sincronizacion de banda ancha de nr.
MY185466A (en) * 2018-02-27 2021-05-19 Mitsubishi Electric Corp Wireless transmitter, wireless receiver, wireless communication system, control circuit, and storage medium
CN111371716B (zh) * 2018-12-26 2022-07-19 深圳市力合微电子股份有限公司 一种适应不同多径衰落信道的导频图案通用生成方法
RU2713378C1 (ru) * 2019-06-14 2020-02-05 Акционерное общество "Концерн "Созвездие" Способ оценки параметров канала в OFDM-системах

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5303263A (en) 1991-06-25 1994-04-12 Oki Electric Industry Co., Ltd. Transmission channel characteristic equalizer
US5488635A (en) 1993-10-29 1996-01-30 General Electric Company Low complexity adaptive equalizer radio receiver employing reduced complexity branch metric calculation
US5732113A (en) 1996-06-20 1998-03-24 Stanford University Timing and frequency synchronization of OFDM signals
US6654428B1 (en) 1998-01-13 2003-11-25 Massachusetts Institute Of Technology Systems and methods for wireless communications
EP0938208A1 (de) * 1998-02-22 1999-08-25 Sony International (Europe) GmbH Mehrträgerübertragung, kompatible zum existierenden GSM-System
US6654429B1 (en) 1998-12-31 2003-11-25 At&T Corp. Pilot-aided channel estimation for OFDM in wireless systems
JP4410388B2 (ja) * 1999-06-22 2010-02-03 パナソニック株式会社 Ｏｆｄｍ復調装置およびｏｆｄｍ復調方法
US6954481B1 (en) * 2000-04-18 2005-10-11 Flarion Technologies, Inc. Pilot use in orthogonal frequency division multiplexing based spread spectrum multiple access systems
JP3691357B2 (ja) 2000-06-19 2005-09-07 日本放送協会 直交周波数分割多重伝送方式におけるキャリアの配置方法、及び送信装置並びに受信装置
US6654728B1 (en) 2000-07-25 2003-11-25 Deus Technologies, Llc Fuzzy logic based classification (FLBC) method for automated identification of nodules in radiological images
DE60028200T2 (de) * 2000-08-01 2007-03-15 Sony Deutschland Gmbh Vorrichtung und Verfahren zur Kanalschätzung für OFDM-System
CN1339506A (zh) 2000-08-23 2002-03-13 上海博德基因开发有限公司 一种新的多肽——人多聚腺苷酸结合蛋白20.13和编码这种多肽的多核苷酸
US7054375B2 (en) 2000-12-22 2006-05-30 Nokia Corporation Method and apparatus for error reduction in an orthogonal modulation system
FR2820574B1 (fr) * 2001-02-08 2005-08-05 Wavecom Sa Procede d'extraction d'un motif de symboles de reference servant a estimer la fonction de transfert d'un canal de transmission, signal, dispositif et procedes correspondants
JP2003032217A (ja) * 2001-07-11 2003-01-31 Matsushita Electric Ind Co Ltd Ｏｆｄｍ通信装置およびｏｆｄｍ信号の搬送波再生方法
JP2003101503A (ja) * 2001-09-21 2003-04-04 Mega Chips Corp Ｏｆｄｍ用等化装置およびｏｆｄｍ用等化方法
US7436881B2 (en) 2001-09-28 2008-10-14 Nec Corporation Per-bin DFE for advanced OQAM-based multi-carrier wireless data transmission systems
US6684173B2 (en) 2001-10-09 2004-01-27 Micron Technology, Inc. System and method of testing non-volatile memory cells
US7324606B2 (en) 2001-10-31 2008-01-29 Henry Stephen Eilts Computationally efficient system and method for channel estimation
US7180965B2 (en) 2001-12-12 2007-02-20 Texas Instruments Incorporated Phase estimation and compensation in orthogonal frequency division multiplex (OFDM) systems
US7139331B2 (en) 2002-03-30 2006-11-21 Broadcom Corporation Characterizing channel response in a single upstream burst using redundant information from training tones
US7020226B1 (en) * 2002-04-04 2006-03-28 Nortel Networks Limited I/Q distortion compensation for the reception of OFDM signals
JP4198428B2 (ja) 2002-04-05 2008-12-17 三菱電機株式会社 無線伝送装置
JP4043335B2 (ja) * 2002-10-08 2008-02-06 株式会社日立国際電気 受信装置
US7039001B2 (en) * 2002-10-29 2006-05-02 Qualcomm, Incorporated Channel estimation for OFDM communication systems
US6928062B2 (en) * 2002-10-29 2005-08-09 Qualcomm, Incorporated Uplink pilot and signaling transmission in wireless communication systems
KR100507519B1 (ko) * 2002-12-13 2005-08-17 한국전자통신연구원 Ｏｆｄｍａ 기반 셀룰러 시스템의 하향링크를 위한 신호구성 방법 및 장치
DE60321401D1 (de) * 2003-05-12 2008-07-10 Mitsubishi Electric Corp Demodulationseinrichtung und demodulationsverfahren
JP4059148B2 (ja) * 2003-06-02 2008-03-12 株式会社村田製作所 導電性ペーストおよびセラミック多層基板
US7200190B2 (en) 2003-06-30 2007-04-03 Motorola, Inc. Unbiased signal to interference ratio in wireless communications devices and methods therefor
US7221680B2 (en) * 2003-09-02 2007-05-22 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20050063298A1 (en) 2003-09-02 2005-03-24 Qualcomm Incorporated Synchronization in a broadcast OFDM system using time division multiplexed pilots
US8526412B2 (en) 2003-10-24 2013-09-03 Qualcomm Incorporated Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system
US8391413B2 (en) 2003-12-19 2013-03-05 Qualcomm Incorporated Channel estimation for an OFDM communication system with inactive subbands
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

Also Published As

Publication number Publication date
CN1981498A (zh) 2007-06-13
ES2322077T3 (es) 2009-06-16
JP2011066902A (ja) 2011-03-31
EP1745618A1 (de) 2007-01-24
JP5080546B2 (ja) 2012-11-21
KR20080098084A (ko) 2008-11-06
KR100925909B1 (ko) 2009-11-09
JP2010093827A (ja) 2010-04-22
US20050249181A1 (en) 2005-11-10
CA2699640A1 (en) 2005-11-24
CN1981498B (zh) 2010-09-29
JP5048481B2 (ja) 2012-10-17
WO2005112378A1 (en) 2005-11-24
JP5474728B2 (ja) 2014-04-16
KR100878430B1 (ko) 2009-01-13
TWI361600B (en) 2012-04-01
US20090129511A1 (en) 2009-05-21
KR20070007956A (ko) 2007-01-16
EP2066088A1 (de) 2009-06-03
PL1745618T3 (pl) 2009-09-30
US7907593B2 (en) 2011-03-15
DE602005013765D1 (de) 2009-05-20
JP2007536803A (ja) 2007-12-13
CA2565527C (en) 2014-04-22
EP1745618B1 (de) 2009-04-08
TW200625881A (en) 2006-07-16
CA2699640C (en) 2011-07-12
US7457231B2 (en) 2008-11-25
CA2565527A1 (en) 2005-11-24

Similar Documents

Publication Publication Date Title
ATE428247T1 (de) Gestufte pilotenubertragung zur kanalschatzung und zeitverfolgung
BR0315773A (pt) Estimativa de canal para sistemas de comunicação ofdm
EP2381633A3 (de) Pilotübertragung und Kanaleinschätzung für ein OFDM-System mit übermäßiger Verzögerungsstreuung
UA95282C2 (ru) Управление скоростью передачи в многоканальных системах связи
TW200706016A (en) Trend influenced time tracking
UA91509C2 (ru) Система модуляции с множеством несущих с разнесением циклических задержек
AR040449A1 (es) Control del caudal para sistemas de comunicaciones de multiples canales
AR058651A1 (es) Estimacion del canal y de interferencia en sistemas de acceso multiple por division de frecuencia de unico portador y de multiples portadores
ATE525838T1 (de) Gerät und verfahren zur kanalschätzung, und drahtloser empfänger
BRPI0512126A (pt) sincronização de tempo utilizando estimação espectral em um sistema de comunicação
WO2006102771A8 (en) Methods and systems for ofdm using code division multiplexing
AR057231A1 (es) Puesta en umbral basada en energia promedia de tap,para la estimacion de canales en sistemas de multiples antenas
WO2008103317A3 (en) Precoded pilot transmission for multi-user and single user mimo communications
TW200721717A (en) Method and apparatus for pilot communication in a multi-antenna wireless communication system
ATE524908T1 (de) Kommunikationsempfänger mit einer veränderlichen entzerrerlänge
ATE482579T1 (de) Verfahren und vorrichtung zur funkträgerauswahl bei funkübertragungssystemen
EP4239896A3 (de) Referenzsignal mit strahlformungstraining und kanalschätzung
AR067821A1 (es) Configuracion de impulsos para egprs-2
MXPA05011433A (es) Ecualizador.
WO2008137650A3 (en) Altering training time or step size of an equalizer as function of channel conditions
EP1630967A3 (de) Impulsradiosysteme mit mehreren Impulstypen
ATE517493T1 (de) Verfahren und vorrichtung zur abschwächung der interferenz in mehrträger-modulationssystemen
WO2007012020A3 (en) Symbol synchronization for ofdm systems
ATE409370T1 (de) Drahtloses datenübertragungsverfahren und vorrichtung
ATE531138T1 (de) Verfahren und system zur erweiterung des übertragungsstrecke in einer asymmetrische digitale teilnehmerleitung (adsl)

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties