Iterative Decoding Using Attenuated Extrinsic Information from Sum-Product Decoder for PMR Channel With Patterned Medium

Author

Nakamura, Yoshihiko ; Nishimura, M. ; Okamoto, Yuji ; Osawa, Hideya ; Hajime Aoi ; Muraoka, Hiroaki ; Nakamura, Yoshihiko

Author_Institution

Graduate Sch. of Sci. & Eng., Ehime Univ., Matsuyama

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2277

Lastpage

2279

Abstract

An LDPC coding and iterative decoding system is studied in perpendicular magnetic recording (PMR) with a bit-patterned medium. We propose an iterative decoding scheme using attenuated extrinsic information from a sum-product decoder, and the bit error rate (BER) performance of the LDPC coding and iterative decoding system is evaluated by R/W computer simulations. It has been clarified that at an areal density of 1 Tbpsi the proposed system provides a jitter margin of the island edges of approximately 0.6% larger than the conventional system using (3, 18)-regular LDPC code

Keywords

channel coding; error statistics; iterative decoding; parity check codes; perpendicular magnetic recording; LDPC coding; PMR channel; attenuated extrinsic information; bit error rate; bit-patterned medium; iterative decoding; jitter; perpendicular magnetic recording; sum-product decoder; AWGN; Additive white noise; Bit error rate; Colored noise; Gaussian noise; Iterative decoding; Jitter; Magnetic noise; Parity check codes; Perpendicular magnetic recording; Iterative decoding; LDPC codes; patterned medium; perpendicular magnetic recording (PMR);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.893421

Filename

4202981