Improved trellis-coding for partial-response channels

Author

Fredrickson, L. ; Karabed, R. ; Rae, J. ; Siegel, P. ; Thapar, H. ; Wood, R.

Author_Institution

Div. of Storage Syst., IBM Corp., San Jose, CA, USA

Volume

31

Issue

2

fYear

1995

fDate

3/1/1995 12:00:00 AM

Firstpage

1141

Lastpage

1148

Abstract

New code design methods and Viterbi detector architectures are presented for high-rate trellis-coded partial-response (TCPR) systems. The methods, which extend the matched-spectral-null (MSN) coding technique, use novel code constraints and time-varying detector trellis structures to reduce path memory requirements by as much as a factor of two, relative to previously reported codes, while retaining the other attractive features of MSN codes. The design methods and corresponding time-varying trellis structures are illustrated with several examples.<>

Keywords

Viterbi detection; digital magnetic recording; partial response channels; time-varying channels; trellis codes; Viterbi detector architectures; code constraints; code design methods; digital magnetic recording; matched-spectral-null coding; partial-response channels; path memory requirements; time-varying detector trellis structures; trellis-coding; Decoding; Degradation; Design methodology; Detectors; Digital magnetic recording; Hardware; Magnetic analysis; Prototypes; Very large scale integration; Viterbi algorithm;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.364798

Filename

364798