PL1875696T3 - Oszacowanie rozproszenia Dopplera w systemach OFDM - Google Patents

Oszacowanie rozproszenia Dopplera w systemach OFDM

Info

Publication number
PL1875696T3
PL1875696T3 PL06724116T PL06724116T PL1875696T3 PL 1875696 T3 PL1875696 T3 PL 1875696T3 PL 06724116 T PL06724116 T PL 06724116T PL 06724116 T PL06724116 T PL 06724116T PL 1875696 T3 PL1875696 T3 PL 1875696T3
Authority
PL
Poland
Prior art keywords
doppler spread
carrier frequencies
estimated
channel
ofdm systems
Prior art date
Application number
PL06724116T
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 US11/110,840 external-priority patent/US7602852B2/en
Priority claimed from US11/110,838 external-priority patent/US7474611B2/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
Publication of PL1875696T3 publication Critical patent/PL1875696T3/pl

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Radio Relay Systems (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
PL06724116T 2005-04-21 2006-04-07 Oszacowanie rozproszenia Dopplera w systemach OFDM PL1875696T3 (pl)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11/110,840 US7602852B2 (en) 2005-04-21 2005-04-21 Initial parameter estimation in OFDM systems
US11/110,838 US7474611B2 (en) 2005-04-21 2005-04-21 Reduced complexity channel 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
EP06724116A EP1875696B1 (en) 2005-04-21 2006-04-07 Doppler spread estimation for ofdm systems

Publications (1)

Publication Number Publication Date
PL1875696T3 true PL1875696T3 (pl) 2010-03-31

Family

ID=36589141

Family Applications (1)

Application Number Title Priority Date Filing Date
PL06724116T PL1875696T3 (pl) 2005-04-21 2006-04-07 Oszacowanie rozproszenia Dopplera w systemach OFDM

Country Status (10)

Country Link
EP (3) EP1875696B1 (pl)
JP (3) JP4856171B2 (pl)
KR (2) KR101256696B1 (pl)
AT (2) ATE444634T1 (pl)
DE (2) DE602006009496D1 (pl)
ES (2) ES2334383T3 (pl)
HK (1) HK1123139A1 (pl)
PL (1) PL1875696T3 (pl)
TW (1) TW200707991A (pl)
WO (3) WO2006111275A2 (pl)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4856171B2 (ja) * 2005-04-21 2012-01-18 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） Ｏｆｄｍシステムにおける複雑度を低減したチャネル推定
US7907673B2 (en) * 2006-10-26 2011-03-15 Telefonaktiebolaget L M Ericsson (Publ) Robust and low-complexity combined signal power estimation
WO2008133559A1 (en) * 2007-04-26 2008-11-06 Nanoradio Ab A method and an apparatus for estimating a delay spread of a multipath channel
EP1988676B1 (en) * 2007-05-03 2019-02-20 Telefonaktiebolaget LM Ericsson (publ) Determining a frequency error in a receiver of an wireless ofdm communications system
EP2071784B1 (en) 2007-12-10 2013-05-22 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Method and apparatus for delay spread estimation
EP2071787B1 (en) 2007-12-10 2013-03-13 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Method and apparatus for positioning an FFT- window in an OFDM-receiver
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
JP5281078B2 (ja) * 2008-04-11 2013-09-04 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 (en) 2008-10-30 2014-01-15 Telefonaktiebolaget LM Ericsson (publ) Method and receiver for estimating and reporting a channel quality measure
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 (en) 2012-06-28 2016-12-21 Telefonaktiebolaget LM Ericsson (publ) Channel spread estimation
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
WO2003032541A1 (fr) * 2001-09-28 2003-04-17 Fujitsu Limited Procede et dispositif de reception a multiplexage par repartition orthogonale de la frequence
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
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
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 (en) * 2002-10-21 2004-04-28 STMicroelectronics N.V. Synchronization using training sequences with a periodical structure
JP4153347B2 (ja) * 2003-04-07 2008-09-24 シャープ株式会社 Ｏｆｄｍ受信機
EP1469647B1 (en) * 2003-04-17 2007-01-10 Mitsubishi Electric Information Technology Centre Europe B.V. OFDM symbol synchronisation
EP1624602B1 (en) * 2003-05-12 2008-05-28 Mitsubishi Denki Kabushiki Kaisha Demodulation device and demodulation method
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
US8165167B2 (en) * 2005-03-10 2012-04-24 Qualcomm Incorporated Time tracking for a communication system
JP4856171B2 (ja) * 2005-04-21 2012-01-18 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） Ｏｆｄｍシステムにおける複雑度を低減したチャネル推定

Also Published As

Publication number Publication date
EP1875697A2 (en) 2008-01-09
KR20080003349A (ko) 2008-01-07
DE602006001747D1 (de) 2008-08-21
ES2308738T3 (es) 2008-12-01
WO2006111275A2 (en) 2006-10-26
KR101256696B1 (ko) 2013-04-19
KR20080003438A (ko) 2008-01-07
JP4917595B2 (ja) 2012-04-18
EP1875696A1 (en) 2008-01-09
HK1123139A1 (en) 2009-06-05
ATE444634T1 (de) 2009-10-15
JP2008537416A (ja) 2008-09-11
TW200707991A (en) 2007-02-16
EP1875694A1 (en) 2008-01-09
EP1875696B1 (en) 2009-09-30
WO2006111275A3 (en) 2007-01-04
EP1875697B1 (en) 2012-08-15
EP1875694B1 (en) 2008-07-09
ES2334383T3 (es) 2010-03-09
ATE400954T1 (de) 2008-07-15
WO2006111276A1 (en) 2006-10-26
JP2008537415A (ja) 2008-09-11
JP4856171B2 (ja) 2012-01-18
DE602006009496D1 (de) 2009-11-12
JP2008537417A (ja) 2008-09-11
WO2006111277A1 (en) 2006-10-26

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