ATE444634T1 - Doppler-spreizungsschätzung für ofdm-systeme - Google Patents

Doppler-spreizungsschätzung für ofdm-systeme

Info

Publication number
ATE444634T1
ATE444634T1 AT06724116T AT06724116T ATE444634T1 AT E444634 T1 ATE444634 T1 AT E444634T1 AT 06724116 T AT06724116 T AT 06724116T AT 06724116 T AT06724116 T AT 06724116T AT E444634 T1 ATE444634 T1 AT E444634T1
Authority
AT
Austria
Prior art keywords
doppler spread
carrier frequencies
estimated
channel
ofdm systems
Prior art date
Application number
AT06724116T
Other languages
English (en)
Inventor
Leif Wilhelmsson
Original Assignee
Ericsson Telefon Ab L M
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 claimed from US11/110,838 external-priority patent/US7474611B2/en
Priority claimed from US11/110,840 external-priority patent/US7602852B2/en
Priority claimed from US11/110,668 external-priority patent/US7599453B2/en
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of ATE444634T1 publication Critical patent/ATE444634T1/de

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
    • 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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • 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
    • 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
    • H04L25/0216—Channel estimation of impulse response with estimation of channel length
    • 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
    • H04L25/0234—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals by non-linear interpolation
AT06724116T 2005-04-21 2006-04-07 Doppler-spreizungsschätzung für ofdm-systeme ATE444634T1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/110,838 US7474611B2 (en) 2005-04-21 2005-04-21 Reduced complexity channel estimation in OFDM systems
US11/110,840 US7602852B2 (en) 2005-04-21 2005-04-21 Initial parameter estimation in OFDM systems
US11/110,668 US7599453B2 (en) 2005-04-21 2005-04-21 Doppler spread estimation for OFDM systems
PCT/EP2006/003175 WO2006111277A1 (en) 2005-04-21 2006-04-07 Doppler spread estimation for ofdm systems

Publications (1)

Publication Number Publication Date
ATE444634T1 true ATE444634T1 (de) 2009-10-15

Family

ID=36589141

Family Applications (2)

Application Number Title Priority Date Filing Date
AT06724116T ATE444634T1 (de) 2005-04-21 2006-04-07 Doppler-spreizungsschätzung für ofdm-systeme
AT06724115T ATE400954T1 (de) 2005-04-21 2006-04-07 Kanalschätzung mit verminderter komplexität in ofdm-systemen

Family Applications After (1)

Application Number Title Priority Date Filing Date
AT06724115T ATE400954T1 (de) 2005-04-21 2006-04-07 Kanalschätzung mit verminderter komplexität in ofdm-systemen

Country Status (10)

Country Link
EP (3) EP1875694B1 (de)
JP (3) JP4917595B2 (de)
KR (2) KR20080003438A (de)
AT (2) ATE444634T1 (de)
DE (2) DE602006001747D1 (de)
ES (2) ES2308738T3 (de)
HK (1) HK1123139A1 (de)
PL (1) PL1875696T3 (de)
TW (1) TW200707991A (de)
WO (3) WO2006111277A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE444634T1 (de) * 2005-04-21 2009-10-15 Ericsson Telefon Ab L M Doppler-spreizungsschätzung für ofdm-systeme
US7907673B2 (en) * 2006-10-26 2011-03-15 Telefonaktiebolaget L M Ericsson (Publ) Robust and low-complexity combined signal power estimation
EP2140561B1 (de) 2007-04-26 2017-12-13 Samsung Electronics Co., Ltd. Verfahren und vorrichtung zur schätzung einer verzögerungsverteilung eines mehrwegekanals
EP1988676B1 (de) * 2007-05-03 2019-02-20 Telefonaktiebolaget LM Ericsson (publ) Bestimmung eines frequenzfehlers bei einem empfänger eines drahtlosen ofdm-kommunikationssystems
EP2071784B1 (de) 2007-12-10 2013-05-22 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Verfahren und Vorrichtung zur Beurteilung der Verzögerungsstreuung
EP2071787B1 (de) * 2007-12-10 2013-03-13 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Verfahren und Vorrichtung zur Anordnung eines FFT-Fensters in einem OFDM-Empfänger
CN101212433B (zh) * 2007-12-25 2011-12-28 北京创毅视讯科技有限公司 一种信道估计方法及信道估计装置
WO2009125592A1 (ja) * 2008-04-11 2009-10-15 パナソニック株式会社 受信装置、集積回路、デジタルテレビ受像機、受信方法、及び受信プログラム
EP2182754B1 (de) 2008-10-30 2014-01-15 Telefonaktiebolaget LM Ericsson (publ) Verfahren und Empfänger zur Schätzung und Berichterstattung eines Kanalqualitätsmaßes
KR101067558B1 (ko) * 2009-10-13 2011-09-27 성균관대학교산학협력단 주파수 옵셋 추정 장치 및 주파수 옵셋 추정 방법
JP4975085B2 (ja) 2009-11-09 2012-07-11 三菱電機株式会社 受信装置および方法
CN101925173B (zh) * 2010-09-07 2012-11-28 上海交通大学 正交频分复用系统的定时同步方法
EP2680517B1 (de) 2012-06-28 2016-12-21 Telefonaktiebolaget LM Ericsson (publ) Kanalstreuungsschätzung
DE102020202890B3 (de) * 2020-03-06 2021-07-08 Continental Automotive Gmbh Verfahren und Kommunikationsvorrichtung zum Kompensieren von Doppler-Effekten in empfangenen drahtlosen Kommunikationssignalen

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2685839A1 (fr) * 1991-12-26 1993-07-02 Thomson Csf Procede de modulation et de demodulation coherent pour la transmission de donnees haut debit en hf.
JP2991862B2 (ja) * 1992-06-29 1999-12-20 三菱電機株式会社 移動体通信における送信電力制御装置およびシステム
FR2743967B1 (fr) * 1996-01-18 1998-03-27 France Telecom Procede et dispositif de synchronisation temporelle d'un recepteur d'un signal multiporteuse
JP3851017B2 (ja) * 1999-04-06 2006-11-29 日本放送協会 Ｏｆｄｍ復調装置
GB2353680A (en) * 1999-08-27 2001-02-28 Mitsubishi Electric Inf Tech OFDM frame synchronisation
US6771591B1 (en) * 2000-07-31 2004-08-03 Thomson Licensing S.A. Method and system for processing orthogonal frequency division multiplexed signals
JP4511714B2 (ja) * 2000-12-05 2010-07-28 パナソニック株式会社 Ｏｆｄｍ受信装置
US7133474B2 (en) * 2001-07-31 2006-11-07 Motorola, Inc. Method and system for timing recovery and delay spread estimation in a communication system
US7023928B2 (en) * 2001-08-06 2006-04-04 Lucent Technologies Inc. Synchronization of a pilot assisted channel estimation orthogonal frequency division multiplexing system
JP4640754B2 (ja) 2001-09-28 2011-03-02 富士通株式会社 Ｏｆｄｍ受信方法及びｏｆｄｍ受信装置
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
JP4150584B2 (ja) * 2001-12-26 2008-09-17 株式会社日立国際電気 伝送信号の復調方法および受信装置並びに信号伝送システム
US7126996B2 (en) * 2001-12-28 2006-10-24 Motorola, Inc. Adaptive transmission method
JP3993441B2 (ja) * 2002-02-01 2007-10-17 株式会社日立国際電気 Ｏｆｄｍ信号受信装置
DE10225662B4 (de) * 2002-06-10 2006-05-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Empfänger
EP1414208A1 (de) * 2002-10-21 2004-04-28 STMicroelectronics N.V. Synchronisation mit Hilfe von Trainingssequenzen mit einer periodischen Struktur
JP4153347B2 (ja) * 2003-04-07 2008-09-24 シャープ株式会社 Ｏｆｄｍ受信機
DE60311067T2 (de) * 2003-04-17 2007-08-16 Mitsubishi Denki K.K. OFDM-Symbolsynchronisierung
WO2004100413A1 (ja) * 2003-05-12 2004-11-18 Mitsubishi Denki Kabushiki Kaisha 復調装置及び復調方法
TWI220547B (en) * 2003-07-08 2004-08-21 Realtek Semiconductor Corp Symbol boundary detection device and method
GB2412552A (en) * 2004-03-26 2005-09-28 Sony Uk Ltd Receiver
JP2005328312A (ja) * 2004-05-13 2005-11-24 Ntt Docomo Inc チャネル推定装置、チャネル推定方法及び無線受信機
JP4234667B2 (ja) * 2004-11-30 2009-03-04 株式会社東芝 移動体用ｏｆｄｍ受信装置
US8144824B2 (en) * 2005-03-10 2012-03-27 Qualcomm Incorporated Trend influenced time tracking
ATE444634T1 (de) * 2005-04-21 2009-10-15 Ericsson Telefon Ab L M Doppler-spreizungsschätzung für ofdm-systeme

Also Published As

Publication number Publication date
EP1875697B1 (de) 2012-08-15
EP1875694A1 (de) 2008-01-09
ES2308738T3 (es) 2008-12-01
EP1875697A2 (de) 2008-01-09
JP4917595B2 (ja) 2012-04-18
HK1123139A1 (en) 2009-06-05
JP2008537415A (ja) 2008-09-11
EP1875696B1 (de) 2009-09-30
JP4856171B2 (ja) 2012-01-18
DE602006009496D1 (de) 2009-11-12
JP2008537417A (ja) 2008-09-11
DE602006001747D1 (de) 2008-08-21
PL1875696T3 (pl) 2010-03-31
KR20080003438A (ko) 2008-01-07
WO2006111275A2 (en) 2006-10-26
WO2006111277A1 (en) 2006-10-26
TW200707991A (en) 2007-02-16
KR20080003349A (ko) 2008-01-07
ES2334383T3 (es) 2010-03-09
JP2008537416A (ja) 2008-09-11
ATE400954T1 (de) 2008-07-15
EP1875696A1 (de) 2008-01-09
KR101256696B1 (ko) 2013-04-19
WO2006111276A1 (en) 2006-10-26
EP1875694B1 (de) 2008-07-09
WO2006111275A3 (en) 2007-01-04

Similar Documents

Publication Publication Date Title
ATE444634T1 (de) Doppler-spreizungsschätzung für ofdm-systeme
JP2007300383A (ja) Ｍｉｍｏ−ｏｆｄｍ送信機
DE602006011452D1 (de) Zeitbereichs-Fenstertechnik und Zwischen-Träger-Störungslöschung
TW200708020A (en) Collection window positioning using time tracking information
WO2007067136A3 (en) Method and system of channel estimation
CL2006001941A1 (es) Metodo y aparato para la estimacion de un canal y del nivel de interferencia de un sistema de comunicacion inalambrica.
ATE520232T1 (de) Unterdrückung von in der aufwärtsübertragung auftretenden zwischenträger-interferenzen bei ofdma-übertragungssystemen
NO20070901L (no) Frekvensdomenefiltering for a forbedre kanalestimering i flerbaeresystem
ATE407502T1 (de) Verfahren zu unterdrückung spektraler nebenzipfel in auf ofdm beruhenden übertragungssystemen
DE602005002525D1 (de) Einrichtung und Verfahren zur pilotgestützten Kanalschätzung in Zeitachse in einem OFDM Kommunikationssystem
WO2008049714A8 (en) Robust and low-complexity combined signal power estimation for ofdm
TW200705916A (en) Adaptive time-filtering for channel estimation in OFDM system
WO2006102771A8 (en) Methods and systems for ofdm using code division multiplexing
ATE525838T1 (de) Gerät und verfahren zur kanalschätzung, und drahtloser empfänger
WO2010059521A3 (en) Channel estimation and peak to average power ratio reduction in multi - carrier modulation receivers
MY165242A (en) Pilot patterns for ofdm systems with multiple antennas
WO2011051252A3 (en) Method and apparatus for channel quality derivation
TW200709621A (en) Frequency tracking and channel estimation in orthogonal frequency division multiplexing systems
MY139100A (en) Adaptive channel estimation for orthogonal frequency division multiplexing systems or the like
TW200623660A (en) FFT carrier frequency offset estimation for OFDM signal
TW200746739A (en) Impulsive noise suppression scheme in orthogonal frequency division multiplexing
KR101622798B1 (ko) 무선 통신 시스템에서 채널 추정 방법 및 장치
DE502005000890D1 (de) Verfahren zur Unterdrückung spektraler Nebenzipfel in auf OFDM beruhenden Übertragungssystemen
EP1555783A3 (de) Pilotgestütztes Kanalschätzverfahren für ein Mehrträger-CDMA-System mit Frequenzverschachtelung
ATE436141T1 (de) Datenschätzung für zero-prefix-ofdm-systeme

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification

Ref document number: 1875696

Country of ref document: EP