Write-margin improvement of non-binary LDPC coding and iterative decoding system in BPM R/W channel with write-errors

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The write-margin of the iterative decoding systems for the binary and non-binary low-density parity-check (LDPC) codes are studied in the magnetic recording system using a bit-patterned medium (BPM) R/W channel with write-errors caused by the write-head field gradient, the media switching field distribution (SFD), the magnetization fields from adjacent islands, and the island position deviation. The performances of iterative decoding systems using the binary and non-binary LDPC codes are evaluated by computer simulation at an areal recording density of 2 Tb/inch2. The results show that the non-binary LDPC coding and iterative decoding system improves the write-margin compared with the binary LDPC system. Furthermore it is clarified that in order to obtain the sufficient write-margin, it is important to suppress the influence of the demagnetization fields from adjacent islands.

Original languageEnglish
Title of host publication2012 IEEE Global Communications Conference, GLOBECOM 2012
Pages3214-3218
Number of pages5
DOIs
Publication statusPublished - 2012 Dec 1
Event2012 IEEE Global Communications Conference, GLOBECOM 2012 - Anaheim, CA, United States
Duration: 2012 Dec 32012 Dec 7

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Other

Other2012 IEEE Global Communications Conference, GLOBECOM 2012
CountryUnited States
CityAnaheim, CA
Period12/12/312/12/7

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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