Channel precoding and low-density parity-check codes for magnetic recording

Author

Mittelholzer, Thomas ; Eleftheriou, Evangelos

Author_Institution

IBM Zurich Res. Lab., Ruschlikon, Switzerland

fYear

2003

fDate

29 June-4 July 2003

Firstpage

47

Abstract

At the extremely high-linear-density regime, where +-+ appears to be the dominant error event at the detector output, two complementary methods are presented to improve the performance of iterative detection/decoding schemes based on LDPC codes. First, without increasing complexity, noticeable performance gains can be obtained by using a 1/(1 ⊕ D) precoder for the partial response channel. Second, selecting a longer partial response target provides substantial additional gains.

Keywords

channel coding; error detection; iterative decoding; magnetic recording; parity check codes; partial response channels; LDPC code; channel precoding; code complexity; complementary method; error detector; high-linear-density regime; iterative decoding scheme; iterative detection; low-density parity-check code; magnetic recording; partial response channel; partial response target channel selection; AWGN; Additive white noise; Detectors; Event detection; Gaussian noise; Magnetic recording; Maximum likelihood detection; Parity check codes; Performance gain; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 2003. Proceedings. IEEE International Symposium on

Print_ISBN

0-7803-7728-1

Type

conf

DOI

10.1109/ISIT.2003.1228061

Filename

1228061