Title :
Improving performance of PRML/EPRML through noise prediction
Author :
Eleftheriou, Evangelos ; Hirt, Walter
Author_Institution :
Zurich Res. Lab., IBM Res. Div., Ruschlikon, Switzerland
fDate :
9/1/1996 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
