Performance evaluation of LDPC coding and iterative decoding system in BPM R/W channel affected by head field gradient, media SFD and demagnetization field

Yasuaki Nakamura, Yoshihiro Okamoto, Hisashi Osawa, Hajime Aoi, Hiroaki Muraoka

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

We evaluate the performance of the write-margin for the low-density parity-check (LDPC) coding and iterative decoding system in the bit-patterned media (BPM) R/W channel affected by the write-head field gradient, the media switching field distribution (SFD), the demagnetization field from adjacent islands and the island position deviation. It is clarified that the LDPC coding and iterative decoding system in R/W channel using BPM at 3 Tbit/inch 2 has a write-margin of about 20%.

Original languageEnglish
Pages (from-to)88-93
Number of pages6
JournalPhysics Procedia
Volume16
DOIs
Publication statusPublished - 2011
Event9th Perpendicular Magnetic Recording Conference, PMRC 2010 - Sendai, Japan
Duration: 2011 May 172011 May 19

Keywords

  • Bit-patterned media
  • Iterative decoding
  • LDPC code
  • Write-error
  • Write-margin

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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