Improving performance of PRML/EPRML through noise prediction

Author

Eleftheriou, Evangelos ; Hirt, Walter

Author_Institution

Zurich Res. Lab., IBM Res. Div., Ruschlikon, Switzerland

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3968

Lastpage

3970

Abstract

Sequence estimation detectors for the digital magnetic recording channel based on noise-predictive partial-response equalization are described. Called noise-predictive maximum-likelihood (NPML) detectors, they imbed a noise prediction/whitening process into the branch metric computation of a Viterbi detector. Simulation results show that a judicious tradeoff between system parameters leads to substantial performance gains over both PRML and EPRML systems. A programmable 8-state NPML detector without decision feedback is presented

Keywords

Viterbi detection; digital magnetic recording; estimation theory; interference suppression; magnetic disc storage; magnetic recording noise; maximum likelihood detection; prediction theory; signal processing; EPRML; Gaussian noise; PR4 signal shaping; Viterbi detector; digital magnetic recording channel; extended PRML; intersymbol interference; maximum likelihood sequence detection; model; noise prediction; noise-predictive partial-response equalization; partial response equalisation; sequence estimation detectors; simulation; Assembly; Colored noise; Detectors; Equalizers; Filters; Gain; Low-noise amplifiers; Polynomials; Tellurium; Viterbi algorithm;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539233

Filename

539233