13B9T符号の光磁気記録における有効性について  [in Japanese] Effectiveness of 13B9T codes for MO Recording Systems  [in Japanese]

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Abstract

光磁気ディスクの記録密度を増加させるために,13B9T符号と名付けた新しい3値記録符号を開発している.この符号は4B3T符号と同じくc制約を満足し,4B3T符号と3B2T符号の両者にないk制約を有している.符号化効率は1.44である.従来の多値光磁気記録システムは, PR(1,1)方式を組み合わせた3B2T符号がビット誤り率(BER)に関して優れているが,本研究ではこの13B9T符号にPR(1,2,1)方式を組み合わせることでBER=10^<-4>において, PR(1,1)方式を組み合わせた3B2T符号より約1.5dBよいCN比を得ることができた.

We developed a new robust ternary recording code called a 13B9T code, for increasing the recording density in magneto-optical disks. Like the 4B3T code, it satisfies the c constraint property. It also successfully attains a k constraint property which is not possessed in both the 4B3T and 3B2T code. In terms of bit error rate (BER) characteristics, The coding efficiency of this code is 1.44. Since the 3B2T code combined with PR(1,1) method is regarded as the most attractive combination for MO recording systems bit error rate characteristics, we investigated the BER of our new code (13B9T code) for comparison. Computer simulation results show that the developed 13B9T code combined with the PR(1,2,1) method gives a 1.5dB better CN ratio than the 3B2T code with the PR(1,1) method at BER=10^<-4>.

Journal

  • IEICE technical report. Magnetic recording

    IEICE technical report. Magnetic recording 95(402), 31-38, 1995-12-08

    The Institute of Electronics, Information and Communication Engineers

References:  10

Codes

  • NII Article ID (NAID)
    110003186215
  • NII NACSIS-CAT ID (NCID)
    AN10013050
  • Text Lang
    JPN
  • Article Type
    ART
  • Data Source
    CJP  NII-ELS 
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