Distance spectra for PRML channels

Author

Weathers, Anthony D. ; Altekar, Shirish A. ; Wolf, Jack K.

Author_Institution

Overland Data Inc., San Diego, CA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

2809

Lastpage

2811

Abstract

Distance spectra for partial response maximum likelihood (PRML) channels are computed by finding generating functions for their error state diagrams. A matrix oriented technique for calculating the generating function is discussed that is reasonable for systems with a relatively small number of states. For those cases where the number of states is larger, a computer search algorithm is described which yields the first few terms of the generating function. Results are presented for channels that are of a form suitable for digital magnetic and digital optical recording. The effect of preceding is also considered

Keywords

digital magnetic recording; magneto-optical recording; maximum likelihood detection; partial response channels; PRML channels; computer search algorithm; digital magnetic recording; digital optical recording; distance spectra; error state diagrams; generating functions; matrix oriented technique; partial response maximum likelihood; Computer errors; Lifting equipment; Magnetic recording; Maximum likelihood detection; Maximum likelihood estimation; Neodymium; Optical recording; Partial response channels; Polynomials; Viterbi algorithm;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617738

Filename

617738