DE69125696D1 - Viterbi Dekodersystem mit Entzerrer verändlichen Grades - Google Patents

Viterbi Dekodersystem mit Entzerrer verändlichen Grades

Info

Publication number
DE69125696D1
DE69125696D1 DE69125696T DE69125696T DE69125696D1 DE 69125696 D1 DE69125696 D1 DE 69125696D1 DE 69125696 T DE69125696 T DE 69125696T DE 69125696 T DE69125696 T DE 69125696T DE 69125696 D1 DE69125696 D1 DE 69125696D1
Authority
DE
Germany
Prior art keywords
equalizer
viterbi decoder
decoder system
variable degree
variable
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE69125696T
Other languages
English (en)
Other versions
DE69125696T2 (de
Inventor
Takao Sugawara
Yoshifumi Mizoshita
Hiroshi Mutoh
Kiichirou Kasai
Takenori Ohshima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of DE69125696D1 publication Critical patent/DE69125696D1/de
Publication of DE69125696T2 publication Critical patent/DE69125696T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
DE69125696T 1990-12-20 1991-12-18 Viterbi Dekodersystem mit Entzerrer verändlichen Grades Expired - Fee Related DE69125696T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2411925A JP2668455B2 (ja) 1990-12-20 1990-12-20 ビタビ復調制御方式

Publications (2)

Publication Number Publication Date
DE69125696D1 true DE69125696D1 (de) 1997-05-22
DE69125696T2 DE69125696T2 (de) 1997-07-24

Family

ID=18520839

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69125696T Expired - Fee Related DE69125696T2 (de) 1990-12-20 1991-12-18 Viterbi Dekodersystem mit Entzerrer verändlichen Grades

Country Status (6)

Country Link
US (1) US5287385A (de)
EP (1) EP0492419B1 (de)
JP (1) JP2668455B2 (de)
KR (1) KR960000451B1 (de)
CA (1) CA2058102A1 (de)
DE (1) DE69125696T2 (de)

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JPH05207075A (ja) * 1992-01-24 1993-08-13 Hitachi Ltd ディジタル通信システム
US5377133A (en) * 1992-04-07 1994-12-27 Digital Equipment Corporation System for enhanced implementation of add-compare-select (ACS) functions
FI90705C (fi) * 1992-06-12 1994-03-10 Nokia Oy Ab Adaptiivinen ilmaisumenetelmä ja ilmaisin kvantittuneille signaaleille
JPH065016A (ja) * 1992-06-18 1994-01-14 Canon Inc データ検出装置
WO1994000843A1 (en) * 1992-06-26 1994-01-06 Digital Equipment Corporation Alternative system and method to viterbi detection
JP3470341B2 (ja) * 1992-11-13 2003-11-25 ソニー株式会社 ディジタル信号再生回路
US5414734A (en) * 1993-01-06 1995-05-09 Glenayre Electronics, Inc. Compensation for multi-path interference using pilot symbols
US5424881A (en) * 1993-02-01 1995-06-13 Cirrus Logic, Inc. Synchronous read channel
US5588028A (en) * 1993-02-02 1996-12-24 U.S. Robotics Simplified trellis decoder
JPH06309794A (ja) * 1993-04-26 1994-11-04 Toshiba Corp 再生信号等化装置
DE69424908T2 (de) * 1993-09-20 2000-11-09 Canon Kk Signalverarbeitungsapparat
US5602858A (en) * 1993-09-20 1997-02-11 Kabushiki Kaisha Toshiba Digital signal decoding apparatus having a plurality of correlation tables and a method thereof
US5488591A (en) * 1993-12-24 1996-01-30 Seiko Epson Corporation Improved magneto-optical recording apparatus for digital signal information
US5563864A (en) * 1993-12-24 1996-10-08 Seiko Epson Corporation Information recording and reproducing apparatus
US5619539A (en) * 1994-02-28 1997-04-08 International Business Machines Corporation Data detection methods and apparatus for a direct access storage device
FR2720208B1 (fr) * 1994-05-20 1996-06-21 Alcatel Mobile Comm France Dispositif de prise de décision par estimation de l'algorithme de Viterbi dans un système de radiocommunication.
US5835666A (en) * 1994-09-22 1998-11-10 Canon Kabushiki Kaisha Reproducing apparatus including equalizing means which equalizes a reproduced signal when the signal is between a first and second level and varies the response speed
JP3456781B2 (ja) 1995-02-06 2003-10-14 富士通株式会社 磁気記録再生装置の復調回路
JPH08255434A (ja) * 1995-03-20 1996-10-01 Fujitsu Ltd Ｐｒｍｌの符号化方法、その符号を復調する方法及び装置、及びそれを利用したｐｒｍｌシステム
JPH08287608A (ja) * 1995-04-18 1996-11-01 Fujitsu Ltd 情報再生装置及び最尤等化検出方法
JP3054579B2 (ja) * 1995-05-25 2000-06-19 三洋電機株式会社 Ｖｔｒのイコライザ回路
JPH10150370A (ja) * 1996-11-19 1998-06-02 Sony Corp ビタビ復号器およびビタビ復号方法
JP3776582B2 (ja) * 1998-02-17 2006-05-17 富士通株式会社 記録再生装置
JP3099796B2 (ja) * 1998-02-19 2000-10-16 日本電気株式会社 自動等化方法及び自動等化器
DE19934660C2 (de) * 1998-09-02 2000-08-31 Daimler Chrysler Ag Mehrfrequenz-Superpositions-Empfänger
WO2000042609A1 (fr) * 1999-01-18 2000-07-20 Fujitsu Limited Procede et dispositif de commande de signal reproduit
US6507546B1 (en) 1999-11-12 2003-01-14 Cirrus Logic, Incorporated 2,2,1 Asymmetric partial response target in a sampled amplitude read channel for disk storage systems
US6678230B2 (en) * 2000-10-31 2004-01-13 Matsushita Electric Industrial Co., Ltd. Waveform equalizer for a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium
WO2003019556A2 (en) * 2001-08-21 2003-03-06 Seagate Technology Llc Method and apparatus for selecting equalization targets
MXPA04010139A (es) * 2002-04-16 2005-06-08 Thomson Licensing Sa Arquitectura de descodificador de entramado de television de alta definicion.
JP4259042B2 (ja) * 2002-06-10 2009-04-30 日本電気株式会社 等化装置及び等化方法並びに伝送装置
US20050111593A1 (en) * 2002-08-30 2005-05-26 Fujitsu Limited Decoding apparatus
JP4109173B2 (ja) * 2003-09-09 2008-07-02 松下電器産業株式会社 適応等化装置、及び適応等化方法
KR100982510B1 (ko) * 2003-09-16 2010-09-16 삼성전자주식회사 신호 특성 측정 장치 및 방법
WO2005045831A1 (en) * 2003-11-11 2005-05-19 Samsung Electronics Co., Ltd. Method for determining characteristics of signal and apparatus using the same
KR101044939B1 (ko) * 2003-11-11 2011-06-28 삼성전자주식회사 신호 특성 결정 방법 및 그 장치
US8892986B2 (en) * 2012-03-08 2014-11-18 Micron Technology, Inc. Apparatuses and methods for combining error coding and modulation schemes

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US4468786A (en) * 1982-09-21 1984-08-28 Harris Corporation Nonlinear equalizer for correcting intersymbol interference in a digital data transmission system
US4571734A (en) * 1983-08-05 1986-02-18 International Business Machines Corporation Method and apparatus for decoding the output signal of a partial-response class-IV communication or recording-device channel
US4644564A (en) * 1983-08-05 1987-02-17 International Business Machines Corporation Decoding the output signal of a partial-response class-IV communication or recording device channel
JPH0795710B2 (ja) * 1986-05-22 1995-10-11 日本電信電話株式会社 トランスバ−サル等化器
GB2198015B (en) * 1986-11-15 1990-09-12 Plessey Co Plc Decoding apparatus
JPH0659049B2 (ja) * 1986-12-27 1994-08-03 日本電気株式会社 デ−タ受信機
US4788694A (en) * 1987-02-20 1988-11-29 American Telephone And Telegraph Company, At&T Bell Laboratories Trellis coding with substrates
NO163120C (no) * 1987-05-19 1990-04-04 Sintef Fremgangsmaate ved demodulasjon i digitale kommunikasjonssystemer med flerbane-propagasjon.
GB2215567B (en) * 1988-03-05 1992-11-18 Plessey Co Plc Improvements in or relating to equalisers
EP0363551B1 (de) * 1988-10-17 1994-12-07 International Business Machines Corporation Adaptiver Entzerrer für Aufzeichnungssysteme unter Verwendung von Partial-Response-Signalisierung
JPH02141968A (ja) * 1988-11-22 1990-05-31 Sony Corp デイジタル信号の再生回路
US5031195A (en) * 1989-06-05 1991-07-09 International Business Machines Corporation Fully adaptive modem receiver using whitening matched filtering
SE464902B (sv) * 1989-10-24 1991-06-24 Ericsson Telefon Ab L M Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet
JPH04192161A (ja) * 1990-11-27 1992-07-10 Sony Corp ディスクの信号再生方式

Also Published As

Publication number Publication date
KR960000451B1 (ko) 1996-01-06
CA2058102A1 (en) 1992-06-21
JP2668455B2 (ja) 1997-10-27
DE69125696T2 (de) 1997-07-24
EP0492419B1 (de) 1997-04-16
US5287385A (en) 1994-02-15
KR920013384A (ko) 1992-07-29
JPH04221464A (ja) 1992-08-11
EP0492419A2 (de) 1992-07-01
EP0492419A3 (en) 1993-07-14

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee