A signal detection technique using LDPC decoder as channel decoder over recording channels

Author

Lee, Jun

Author_Institution

LG Electron. in Korea, Seoul, South Korea

Volume

55

Issue

4

fYear

2009

fDate

11/1/2009 12:00:00 AM

Firstpage

2012

Lastpage

2015

Abstract

This paper introduces a signal detection technique using a low-density parity-check (LDPC) code over precoded partial response (PR) recording channels. Under a PR channel considered, the detection scheme can be realized through (1) the design of a precoder that a level detection is available and (2) the modification of the likelihood function (LF) for a sum-product algorithm. A LDPC decoder plays a role as a channel decoder and configures turbo-like systems with the concatenation of outer codes. Besides, the application of the scheme into conventional turbo-like system achieves the performance improvement irrespective of recording densities.

Keywords

channel coding; concatenated codes; decoding; parity check codes; precoding; signal detection; channel decoder; concatenated codes; low density parity check decoder; precoded partial response recording channels; signal detection; sum-product algorithm; turbo-like systems; Detectors; Iterative decoding; Magnetic recording; Maximum likelihood decoding; Maximum likelihood detection; Maximum likelihood estimation; Parity check codes; Partial response channels; Signal detection; Sum product algorithm; Low-density parity-check code, partial response maximum likelihood (PRML) system, sum-product algorithm, turbo-like systems.;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2009.5373763

Filename

5373763