ECC-less LDPC coding for magnetic recording channels

Author

Morita, Toshihiko ; Sato, Yuichi ; Sugawara, Takao

Author_Institution

Fujitsu Labs. Ltd., Kawasaki, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2304

Lastpage

2306

Abstract

This paper presents a system for magnetic recording channels, using low-density parity check (LDPC) codes and a novel method of erasure compensation that can correct thermal asperity (TA) and media defects (MDs). The system does not require error-correction codes (ECC) based on the Reed-Solomon codes, and thus is ECC-less. Simulation results show that the performance of ECC-less LDPC codes is better than that of the LDPC codes with ECC. It is also shown that LDPC codes of rate 0.814 can correct 48-byte TA and 24-byte MD, which are sufficient for practical hard disk drives.

Keywords

channel coding; digital magnetic recording; error correction codes; iterative decoding; partial response channels; ECC-less LDPC codes; LDPC coding; erasure compensation; error-correction codes; hard disk drives; iterative decoder; low-density parity check codes; magnetic recording channels; media defects correction; thermal asperity correction; Error correction codes; Hard disks; Iterative decoding; Low pass filters; Magnetic heads; Magnetic noise; Magnetic recording; Parity check codes; Signal to noise ratio; White noise;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.801874

Filename

1042169