Allpass forward equalizer for decision feedback equalization

Author

McEwen, Peter A. ; Kenney, John G.

Author_Institution

Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3045

Lastpage

3047

Abstract

An allpass forward equalizer (APFE) for use with decision feedback equalization (DFE) is described, The APFE has poles, unlike the normally implemented FIR (finite impulse response) forward equalizer; equalizers with poles can provide superior performance or reduced hardware complexity when compared to all-zero equalizers, but can have local optima and are more difficult to design. A theoretical basis for the allpass is presented and a systematic design procedure is described. It is shown that there are no local optima in a sufficient region about the global optimum such that adaptation is feasible. A performance vs. complexity advantage is shown for the APFE relative to the FIR forward equalizer, and implementation as a continuous-time filter is proposed

Keywords

all-pass filters; continuous time filters; decision feedback equalisers; magnetic recording; poles and zeros; signal detection; allpass forward equalizer; continuous-time filter; decision feedback equalization; design procedure; magnetic recording channel; poles; Decision feedback equalizers; Energy consumption; Finite impulse response filter; Hardware; Interference cancellation; Intersymbol interference; Magnetic recording; Poles and zeros; Quantum computing; White noise;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490264

Filename

490264