Offset invariance in maximum-likelihood decoding for a class of partial response channels

Author

Dorfman, Vladimir ; Wolf, Jack Keil

Author_Institution

Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA

Volume

4

Issue

7

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

229

Lastpage

230

Abstract

In this letter we show that for a class of partial response channels with discrete-time pulse response of the form (1-D)P(D) whose output samples are corrupted by independent samples of additive white Gaussian noise with mean m, a maximum likelihood sequence detector designed for the case of m=0 is also the maximum likelihood sequence detector for an arbitrary value of m. The studied class of partial response channels is widely used for the characterization of digital magnetic recording channels where the DC offset is frequently an issue.

Keywords

AWGN; digital magnetic recording; invariance; maximum likelihood decoding; maximum likelihood sequence estimation; partial response channels; AWGN; DC offset; additive white Gaussian noise; digital magnetic recording channels; discrete-time pulse response; maximum likelihood sequence detector; maximum-likelihood decoding; offset invariance; partial response channels; Detectors; Digital magnetic recording; Gaussian noise; Lifting equipment; Magnetic recording; Maximum likelihood decoding; Maximum likelihood detection; Partial response channels; Time factors; Voltage;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.852924

Filename

852924