Dependence of error patterns and BER performance on write pre-compensation in GPRML channels

Y. Okamoto, T. Bushisue, Y. Kurihara, Y. Nakamura, H. Osawa, Hiroaki Muraoka, Y. Nakamura

Research output: Contribution to journalArticlepeer-review

Abstract

Nonlinear transition shift (NLTS) influences the performance of PRML channels in perpendicular magnetic recording. For NLTS, it is thought that write pre-compensation is useful to write the transition at the intended position. In this paper, we study the influence of NLTS on the BER performance of GPRML channels and show the appropriate amount of pre-compensation for GPRML channels both with and without a post-processor (PP) to achieve better BER performance. The results show that the widening the shortest bit length by NLTS brings the BER improvement to GPRML channel and the write pre-compensation is useful for a GPRML channel with PP.

Original languageEnglish
Pages (from-to)3192-3195
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume320
Issue number22
DOIs
Publication statusPublished - 2008 Nov 1

Keywords

  • NLTS
  • Perpendicular magnetic recording
  • Post-processing
  • Write pre-compensation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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