FR2834581B1 - Appareil et procede d'evaluation de signaux - Google Patents

Appareil et procede d'evaluation de signaux

Info

Publication number
FR2834581B1
FR2834581B1 FR0215141A FR0215141A FR2834581B1 FR 2834581 B1 FR2834581 B1 FR 2834581B1 FR 0215141 A FR0215141 A FR 0215141A FR 0215141 A FR0215141 A FR 0215141A FR 2834581 B1 FR2834581 B1 FR 2834581B1
Authority
FR
France
Prior art keywords
evaluating signals
evaluating
signals
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
FR0215141A
Other languages
English (en)
Other versions
FR2834581A1 (fr
Inventor
Jun Akiyama
Tetsuya Okumura
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of FR2834581A1 publication Critical patent/FR2834581A1/fr
Application granted granted Critical
Publication of FR2834581B1 publication Critical patent/FR2834581B1/fr
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
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G11B20/10101—PR2 or PR(1,2,1), i.e. partial response class 2, polynomial (1+D)2=1+2D+D2
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10515—Reproducing
    • 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
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • G11B20/10287—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors
    • G11B20/10296—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors using the Viterbi algorithm
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267—Power calibration
    • 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
    • H03M13/01—Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • 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
    • 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
    • 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
    • H03M13/63—Joint error correction and other techniques
    • H03M13/6343—Error control coding in combination with techniques for partial response channels, e.g. recording
FR0215141A 2001-12-04 2002-12-02 Appareil et procede d'evaluation de signaux Expired - Fee Related FR2834581B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001369955A JP3817470B2 (ja) 2001-12-04 2001-12-04 信号評価装置および信号評価方法

Publications (2)

Publication Number Publication Date
FR2834581A1 FR2834581A1 (fr) 2003-07-11
FR2834581B1 true FR2834581B1 (fr) 2008-06-20

Family

ID=19179266

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0215141A Expired - Fee Related FR2834581B1 (fr) 2001-12-04 2002-12-02 Appareil et procede d'evaluation de signaux

Country Status (5)

Country Link
US (1) US7080313B2 (fr)
JP (1) JP3817470B2 (fr)
CN (1) CN1236447C (fr)
DE (1) DE10256088A1 (fr)
FR (1) FR2834581B1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW509900B (en) * 2000-02-29 2002-11-11 Via Tech Inc Error correction method for correcting errors in digital data
US7864895B1 (en) * 2003-09-23 2011-01-04 Marvell International Ltd. Viterbi detection using a correlation metric
US7388938B2 (en) * 2004-05-28 2008-06-17 Hitachi Global Storage Technologies-Netherlands B.V. Method for bit-byte synchronization in sampling a data string
US7876862B2 (en) * 2007-07-16 2011-01-25 Agere Systems Inc. Conditionally input saturated Viterbi detector
FR2927206B1 (fr) * 2008-02-04 2014-02-14 Groupe Des Ecoles De Telecommunications Get Ecole Nationale Superieure Des Telecommunications Enst Procede de decodage d'un signal transmis dans un systeme multi-antennes, produit programme d'ordinateur et dispositif de decodage correspondants.
KR20100115699A (ko) * 2008-02-28 2010-10-28 파나소닉 주식회사 신호 평가 방법 및 신호 평가 장치
US8255778B2 (en) * 2008-05-02 2012-08-28 Nec Laboratories America, Inc. Hybrid ARQ transmission method with effective channel matrix and decision statistics resetting
US8027114B1 (en) 2008-06-02 2011-09-27 Marvell International Ltd. Spiral servo detection with phase-locked loop (PLL)
EP2509246B1 (fr) 2010-06-18 2014-01-08 Cisco Technology, Inc. Procédé et circuit pour estimation BER
CN112070030B (zh) * 2020-09-09 2022-06-10 电子科技大学 一种巴克豪森信号随机性度量及转换方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583078A (en) * 1984-11-13 1986-04-15 Communications Satellite Corporation Serial Viterbi decoder
JPH0877726A (ja) * 1994-09-06 1996-03-22 Hitachi Ltd ディジタル信号処理装置、誤り検出方法および記録媒体再生装置
CA2171922C (fr) * 1995-03-31 2001-12-11 Joseph Michael Nowack Decodeur et methode de decodage connexe
JP3674160B2 (ja) * 1996-07-04 2005-07-20 ソニー株式会社 情報記録再生装置の余裕度検出装置
US6442730B1 (en) * 1997-01-27 2002-08-27 Lecroy Corporation Recording medium failure analysis apparatus and method
JPH10289539A (ja) * 1997-04-11 1998-10-27 Sony Corp 情報再生装置および再生方法
US6519715B1 (en) * 1998-05-22 2003-02-11 Hitachi, Ltd. Signal processing apparatus and a data recording and reproducing apparatus including local memory processor
US6732328B1 (en) * 1999-07-12 2004-05-04 Maxtor Corporation Two stage detector having viterbi detector matched to a channel and post processor matched to a channel code

Also Published As

Publication number Publication date
CN1434448A (zh) 2003-08-06
US7080313B2 (en) 2006-07-18
FR2834581A1 (fr) 2003-07-11
DE10256088A1 (de) 2003-07-17
JP3817470B2 (ja) 2006-09-06
JP2003173618A (ja) 2003-06-20
US20030135812A1 (en) 2003-07-17
CN1236447C (zh) 2006-01-11

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Legal Events

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Effective date: 20160831