Performance evaluation of non-binary LDPC coding and iterative decoding system for BPM R/W channel with write-errors

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Bit-patterned medium (BPM) is one of the promising approaches for ultra-high density magnetic recording systems. However, BPM requires precise write synchronization, and exhibits write-errors due to insufficient write field gradient, medium switching field distribution (SFD), demagnetization field from adjacent islands, and island position variation. In this paper, an iterative decoding system using a non-binary low-density parity-check (LDPC) code is considered for a BPMR/Wchannel with write-errors at an areal recording density of 2 Tbit/inch2 including the coding rate loss. The performance of the iterative decoding system using the non-binary LDPC code over the Galois field GF(28) is evaluated by computer simulation, and it is compared with the conventional iterative decoding system using a binary LDPC code. The results show that the non-binary LDPC system has a larger write margin than the binary LDPC system.

Original languageEnglish
Pages (from-to)1497-1503
Number of pages7
JournalIEICE Transactions on Electronics
VolumeE96-C
Issue number12
DOIs
Publication statusPublished - 2013 Dec

Keywords

  • Bit-patterned medium
  • Iterative decoding
  • Non-binary low-density parity-check (LDPC) code
  • Write-error

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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