A study of interactive Processing between PRML detection and erasure error correction in perpendicular recording

Author

Nakamura, Yoshihiko ; Okamoto, Yuji ; Osawa, Hideya ; Muraoka, Hiroaki ; Nakamura, Yoshihiko

Author_Institution

Fac. of Eng., Ehime Univ., Matsuyama, Japan

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

3105

Lastpage

3107

Abstract

In this paper, the interactive processing between a partial-response maximum-likelihood (PRML) channel and a decoder for the Reed-Solomon (RS) code is studied in perpendicular magnetic recording channel. Whereas in conventional systems a run-length-limited (RLL) encoder/decoder is insides the RS encoder/decoder, in this paper, we permute their positions so that the PRML channel and RS decoder can interact. Accordingly, the RS decoder can acquire reliability information from a PRML channel without interruption by the RLL decoder. It is demonstrated by computer simulation that the proposed system provides an SNR improvement of 0.8-1.1 dB compared with a conventional system at a linear density normalized by user bit interval, K, of 1.5.

Keywords

Reed-Solomon codes; error correction codes; maximum likelihood detection; partial response channels; perpendicular magnetic recording; runlength codes; PRML detection; RLL decoder; RS decoder; RS encoder; Reed-Solomon code; computer simulation; erasure error correction; error correction code; interactive processing; linear density; partial-response maximum-likelihood channel; perpendicular magnetic recording; reliability information; run-length-limited encoder; user bit interval; Computer simulation; Disk recording; Equalizers; Error correction; Error correction codes; Magnetic noise; Maximum likelihood decoding; Maximum likelihood detection; Perpendicular magnetic recording; Signal processing; ECC; Error correction code; PRML; RS; Reed–Solomon; channel; code; partial-response maximum-likelihood; perpendicular magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.829284

Filename

1325747