Improved data recovery from patterned media with inherent jitter noise using low-density parity-check codes

Ioannis T. Ntokas, Paul W. Nutter, Cen J. Tjhai, Mohammed Z. Ahmed

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Patterned magnetic media promises areal densities in excess of 1 Tbit/in2 for data storage. However, current imperfect patterning techniques result in a variation in the dimensions and distribution of the fabricated islands. As a result, this variation introduces jitter in the replay waveform that makes data recovery difficult. In this paper, we investigate the use of low-density parity-check (LDPC) codes and iterative decoding for mitigating the effects of lithography jitter and improving the read channel performance in patterned media storage systems. In addition, we show that the adoption of LDPC coding techniques permits an increase in the data storage capability of the medium to approximately 1.6 Tbit/in2 with acceptable bit-error-rate performance. © 2007 IEEE.
    Original languageEnglish
    Pages (from-to)3925-3929
    Number of pages4
    JournalIeee Transactions on Magnetics
    Volume43
    Issue number10
    DOIs
    Publication statusPublished - Oct 2007

    Keywords

    • Lithography jitter
    • Low-density parity-check (LDPC) codes
    • Perpendicular patterned media
    • Read channel performance

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