WO2008136079A1 - イコライザの制御装置及び制御方法並びに前記制御装置をそなえた無線端末 - Google Patents

イコライザの制御装置及び制御方法並びに前記制御装置をそなえた無線端末 Download PDF

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Publication number
WO2008136079A1
WO2008136079A1 PCT/JP2007/058658 JP2007058658W WO2008136079A1 WO 2008136079 A1 WO2008136079 A1 WO 2008136079A1 JP 2007058658 W JP2007058658 W JP 2007058658W WO 2008136079 A1 WO2008136079 A1 WO 2008136079A1
Authority
WO
WIPO (PCT)
Prior art keywords
control apparatus
equalizer
channel estimation
wireless terminal
equalizer control
Prior art date
Application number
PCT/JP2007/058658
Other languages
English (en)
French (fr)
Inventor
Akira Ito
Tsuyoshi Hasegawa
Original Assignee
Fujitsu Limited
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 Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2007/058658 priority Critical patent/WO2008136079A1/ja
Priority to JP2009512813A priority patent/JP4801775B2/ja
Priority to EP07742093.3A priority patent/EP2141822B1/en
Publication of WO2008136079A1 publication Critical patent/WO2008136079A1/ja
Priority to US12/574,954 priority patent/US8265131B2/en

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Classifications

    • 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
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • 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
    • 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
    • H04L25/0218—Channel estimation of impulse response with detection of nulls
    • 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
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • H04L25/03248—Arrangements for operating in conjunction with other apparatus
    • H04L25/03292—Arrangements for operating in conjunction with other apparatus with channel estimation circuitry

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

　本発明は、イコライザのタップ係数算出精度を向上して受信特性を向上できるようにすることを目的の一つとする。そのため、各パスタイミングのチャネル推定値をそれぞれ求め、各パスタイミングの受信電力と所定の電力閾値（Ｐ０）とに基づいてチャネル推定値をゼロにするパスタイミングを検出し、検出したパスタイミングのチャネル推定値をゼロに制御する。
PCT/JP2007/058658 2007-04-20 2007-04-20 イコライザの制御装置及び制御方法並びに前記制御装置をそなえた無線端末 WO2008136079A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2007/058658 WO2008136079A1 (ja) 2007-04-20 2007-04-20 イコライザの制御装置及び制御方法並びに前記制御装置をそなえた無線端末
JP2009512813A JP4801775B2 (ja) 2007-04-20 2007-04-20 イコライザの制御装置及び制御方法並びに前記制御装置をそなえた無線端末
EP07742093.3A EP2141822B1 (en) 2007-04-20 2007-04-20 Equalizer control apparatus, equalizer control method, and wireless terminal having that control apparatus
US12/574,954 US8265131B2 (en) 2007-04-20 2009-10-07 Control apparatus for and control method of equalizer, and wireless terminal having that control apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/058658 WO2008136079A1 (ja) 2007-04-20 2007-04-20 イコライザの制御装置及び制御方法並びに前記制御装置をそなえた無線端末

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/574,954 Continuation US8265131B2 (en) 2007-04-20 2009-10-07 Control apparatus for and control method of equalizer, and wireless terminal having that control apparatus

Publications (1)

Publication Number Publication Date
WO2008136079A1 true WO2008136079A1 (ja) 2008-11-13

Family

ID=39943202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/058658 WO2008136079A1 (ja) 2007-04-20 2007-04-20 イコライザの制御装置及び制御方法並びに前記制御装置をそなえた無線端末

Country Status (4)

Country Link
US (1) US8265131B2 (ja)
EP (1) EP2141822B1 (ja)
JP (1) JP4801775B2 (ja)
WO (1) WO2008136079A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011010086A (ja) * 2009-06-26 2011-01-13 Nec Corp 受信装置、受信方法およびプログラム
WO2013065200A1 (ja) * 2011-11-04 2013-05-10 富士通株式会社 等化処理装置、無線通信端末及び等化処理方法
US8976918B2 (en) 2013-05-29 2015-03-10 Fujitsu Limited Wireless communication device and weight coefficient computation method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8306012B2 (en) * 2007-11-07 2012-11-06 Telefonaktiebolaget L M Ericsson (Publ) Channel estimation for synchronized cells in a cellular communication system
KR101061067B1 (ko) * 2008-10-27 2011-08-31 한국전자통신연구원 식별신호를 이용한 개별 수신전력 계산 장치 및 방법
US8737247B1 (en) * 2010-10-08 2014-05-27 Marvell International Ltd. Data channel noise estimation using pilot channel
WO2012079080A1 (en) * 2010-12-10 2012-06-14 The Trustees Of Columbia University In The City Of New York Methods, systems, and media for detecting usage of a radio channel
US9479372B2 (en) 2012-03-08 2016-10-25 The Trustees Of Columbia University In The City Of New York Methods, systems, and media for determining whether a signal of interest is present
US9831910B2 (en) 2013-09-16 2017-11-28 Marvell International Ltd. Noise estimation based on control messages destined for other mobile terminals

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000049662A (ja) * 1998-08-03 2000-02-18 Nec Corp Ｃｄｍａ受信装置における復調回路
JP2003133999A (ja) 2001-10-30 2003-05-09 Fujitsu Ltd スペクトラム拡散レイク受信機
WO2004025860A1 (ja) 2002-09-13 2004-03-25 Fujitsu Limited スペクトラム拡散レイク受信機
JP2005094134A (ja) 2003-09-12 2005-04-07 Fujitsu Ltd ＭＩＸＲ機能を有するＲａｋｅ受信機
JP2005354459A (ja) 2004-06-11 2005-12-22 Fujitsu Ltd 干渉低減装置及び干渉低減方法
JP2006054840A (ja) * 2004-07-13 2006-02-23 Fujitsu Ltd 伝搬路推定方法及び推定装置
WO2006087808A1 (ja) * 2005-02-18 2006-08-24 Fujitsu Limited 干渉低減受信装置

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US7254171B2 (en) * 2000-01-20 2007-08-07 Nortel Networks Limited Equaliser for digital communications systems and method of equalisation
JP2002280943A (ja) * 2001-03-19 2002-09-27 Hitachi Ltd 無線通信装置
US20020176485A1 (en) * 2001-04-03 2002-11-28 Hudson John E. Multi-cast communication system and method of estimating channel impulse responses therein
JP4406529B2 (ja) * 2002-09-11 2010-01-27 富士通株式会社 パスタイミング検出装置及び受信装置
US7310394B2 (en) * 2004-01-09 2007-12-18 Wang Xiao-An LMMSE-based RAKE receiver with channel tap assignment
JP2005354263A (ja) * 2004-06-09 2005-12-22 Fujitsu Ltd 受信装置及び受信装置におけるパス選択方法
US7324591B2 (en) * 2004-08-17 2008-01-29 Zenith Electronics Corporation Adaptive equalizer
JP4160546B2 (ja) * 2004-09-24 2008-10-01 株式会社東芝 無線通信受信装置
JP2006262039A (ja) * 2005-03-17 2006-09-28 Fujitsu Ltd 伝搬路推定方法及び伝搬路推定装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000049662A (ja) * 1998-08-03 2000-02-18 Nec Corp Ｃｄｍａ受信装置における復調回路
JP2003133999A (ja) 2001-10-30 2003-05-09 Fujitsu Ltd スペクトラム拡散レイク受信機
WO2004025860A1 (ja) 2002-09-13 2004-03-25 Fujitsu Limited スペクトラム拡散レイク受信機
JP2005094134A (ja) 2003-09-12 2005-04-07 Fujitsu Ltd ＭＩＸＲ機能を有するＲａｋｅ受信機
JP2005354459A (ja) 2004-06-11 2005-12-22 Fujitsu Ltd 干渉低減装置及び干渉低減方法
JP2006054840A (ja) * 2004-07-13 2006-02-23 Fujitsu Ltd 伝搬路推定方法及び推定装置
WO2006087808A1 (ja) * 2005-02-18 2006-08-24 Fujitsu Limited 干渉低減受信装置

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A. KLEIN: "Data Detection Algorithms Specially Designed for the Downlink of Mobile Radio Systems", PROC. OF IEEE VTC'97, May 1997 (1997-05-01), pages 203 - 207
HASEGAWA, SHIMIZU: "A Study on Sign Bit Chip Correlation MMSE Receiver with MICT", PROCEEDINGS OF THE IEICE GENERAL CONFERENCE, 2006, pages 5 - 8

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011010086A (ja) * 2009-06-26 2011-01-13 Nec Corp 受信装置、受信方法およびプログラム
WO2013065200A1 (ja) * 2011-11-04 2013-05-10 富士通株式会社 等化処理装置、無線通信端末及び等化処理方法
JPWO2013065200A1 (ja) * 2011-11-04 2015-04-02 富士通株式会社 等化処理装置、無線通信端末及び等化処理方法
US9491016B2 (en) 2011-11-04 2016-11-08 Fujitsu Limited Equalization processing apparatus, wireless communication terminal, and equalization processing method
US8976918B2 (en) 2013-05-29 2015-03-10 Fujitsu Limited Wireless communication device and weight coefficient computation method

Also Published As

Publication number Publication date
US20100020855A1 (en) 2010-01-28
EP2141822B1 (en) 2016-05-04
US8265131B2 (en) 2012-09-11
JP4801775B2 (ja) 2011-10-26
EP2141822A4 (en) 2011-06-01
EP2141822A1 (en) 2010-01-06
JPWO2008136079A1 (ja) 2010-07-29

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