A study of class I partial response signaling for magnetic recording

Author

Ryan, William E. ; Zafer, Bahjat M.

Author_Institution

New Mexico State Univ., Las Cruces, NM, USA

Volume

33

Issue

6

fYear

1997

fDate

11/1/1997 12:00:00 AM

Firstpage

4543

Lastpage

4550

Abstract

Using a semianalytic technique based on the work of Agazzi and Seshadri, we compare the performance of PR1, PR4, and EPR4 partial response schemes on a magnetic recording channel. The technique includes the effect of imperfect equalization and, in the PR4 case, the effect of employing two interleaved Viterbi detectors. Assuming the Lorentzian channel model and superposition, we use this technique to compare these signaling schemes at medium and high recording densities. It is observed that, even with the trivial DC-free code employed, PR1 is superior to PR4 at recording densities beyond about S_c=2.4 and superior to EPR4 beyond about S_c=2.9. In addition, PR1 lends itself to difference metric Viterbi detection. Our analytical results are supported by computer simulations

Keywords

Viterbi detection; magnetic recording; partial response channels; DC-free code; EPR4; Lorentzian channel model; PR1; PR4; class I partial response signaling; computer simulation; difference metric Viterbi detection; equalization; magnetic recording; semianalytic technique; superposition; Attenuation; Computational modeling; Computer simulation; Detectors; Frequency; Magnetic recording; Partial response signaling; Polynomials; Viterbi algorithm;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.649892

Filename

649892