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A study on 3-level decision feedback Viterbi equalizer to (1,7) code at the optical disk recorder.

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Název: A study on 3-level decision feedback Viterbi equalizer to (1,7) code at the optical disk recorder.
Autoři: Itoi, Satoshi1
Zdroj: Electronics & Communications in Japan, Part 2: Electronics. Aug99, Vol. 82 Issue 8, p27-32. 6p.
Témata: *OPTICAL disk drives, *OPTICAL computer equipment, *COMPUTER storage devices, *LASER recording, *ALGORITHMS, *CODING theory, *DECODERS (Electronics)
Abstrakt: For application to recording code and equalization detection suitable for optical disk recorders, we discuss an algorithm for 3-level adaptive DF Viterbi equalization that is a combination of the (1,7) code with 3-level preequalization and RAM-DFE (decision feedback equalization) + Viterbi decoding. Its characteristics are evaluated by simulation. At a BER (bit error rate) of 10-4, the 3-level DF Viterbi equalization is found to exhibit characteristics 0.6 dB better than those of the 3-level 4-state Viterbi decoding for (DFE = 2, Viterbi = 4) and between 0.6 and 0.8 dB better for (DFE = 3, Viterbi = 4). Data recorded and regenerated at a shortest bit length of 0.32 μm and a track pitch of 0.6 μm in land group recording are used to confirm that the convergence of the 3-level DF Viterbi equalization is complete at 1.5×105 clocks with a modification coefficient of 4 and at 3×105 clocks with a modification coefficient of 64, and that the BER is about two-thirds of that for 3-level 4-state Viterbi decoding. © 1999 Scripta Technica, Electron Comm Jpn Pt 2, 82(8): 27–32, 1999 [ABSTRACT FROM AUTHOR]
Databáze: Academic Search Index
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  Label: Title
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  Data: A study on 3-level decision feedback Viterbi equalizer to (1,7) code at the optical disk recorder.
– Name: Author
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  Data: <searchLink fieldCode="AR" term="%22Itoi%2C+Satoshi%22">Itoi, Satoshi</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Electronics+%26+Communications+in+Japan%2C+Part+2%3A+Electronics%22">Electronics & Communications in Japan, Part 2: Electronics</searchLink>. Aug99, Vol. 82 Issue 8, p27-32. 6p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22OPTICAL+disk+drives%22">OPTICAL disk drives</searchLink><br />*<searchLink fieldCode="DE" term="%22OPTICAL+computer+equipment%22">OPTICAL computer equipment</searchLink><br />*<searchLink fieldCode="DE" term="%22COMPUTER+storage+devices%22">COMPUTER storage devices</searchLink><br />*<searchLink fieldCode="DE" term="%22LASER+recording%22">LASER recording</searchLink><br />*<searchLink fieldCode="DE" term="%22ALGORITHMS%22">ALGORITHMS</searchLink><br />*<searchLink fieldCode="DE" term="%22CODING+theory%22">CODING theory</searchLink><br />*<searchLink fieldCode="DE" term="%22DECODERS+%28Electronics%29%22">DECODERS (Electronics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: For application to recording code and equalization detection suitable for optical disk recorders, we discuss an algorithm for 3-level adaptive DF Viterbi equalization that is a combination of the (1,7) code with 3-level preequalization and RAM-DFE (decision feedback equalization) + Viterbi decoding. Its characteristics are evaluated by simulation. At a BER (bit error rate) of 10-4, the 3-level DF Viterbi equalization is found to exhibit characteristics 0.6 dB better than those of the 3-level 4-state Viterbi decoding for (DFE = 2, Viterbi = 4) and between 0.6 and 0.8 dB better for (DFE = 3, Viterbi = 4). Data recorded and regenerated at a shortest bit length of 0.32 μm and a track pitch of 0.6 μm in land group recording are used to confirm that the convergence of the 3-level DF Viterbi equalization is complete at 1.5×105 clocks with a modification coefficient of 4 and at 3×105 clocks with a modification coefficient of 64, and that the BER is about two-thirds of that for 3-level 4-state Viterbi decoding. © 1999 Scripta Technica, Electron Comm Jpn Pt 2, 82(8): 27–32, 1999 [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1002/(SICI)1520-6432(199908)82:8<27::AID-ECJB4>3.0.CO;2-R
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 6
        StartPage: 27
    Subjects:
      – SubjectFull: OPTICAL disk drives
        Type: general
      – SubjectFull: OPTICAL computer equipment
        Type: general
      – SubjectFull: COMPUTER storage devices
        Type: general
      – SubjectFull: LASER recording
        Type: general
      – SubjectFull: ALGORITHMS
        Type: general
      – SubjectFull: CODING theory
        Type: general
      – SubjectFull: DECODERS (Electronics)
        Type: general
    Titles:
      – TitleFull: A study on 3-level decision feedback Viterbi equalizer to (1,7) code at the optical disk recorder.
        Type: main
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          Name:
            NameFull: Itoi, Satoshi
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          Dates:
            – D: 01
              M: 08
              Text: Aug99
              Type: published
              Y: 1999
          Identifiers:
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              Value: 8756663X
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            – Type: volume
              Value: 82
            – Type: issue
              Value: 8
          Titles:
            – TitleFull: Electronics & Communications in Japan, Part 2: Electronics
              Type: main
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