Adaptive continuous-time forward equalization for DFE-based disk-drive read channels

Author

Brown, James E C ; Hurst, Paul J.

Author_Institution

Solid State Circuits Res. Lab., California Univ., Davis, CA, USA

Volume

1

fYear

1995

fDate

Oct. 30 1995-Nov. 1 1995

Firstpage

668

Abstract

A continuous-time forward equalizer for use with decision-feedback equalization (DFE) is proposed which exploits correlation between the disk-drive readback signal and its derivative. The performance of the one-zero equalizer is derived for an infinite-length DFE and a 4-tap DFE and is shown to perform as well as a 5-tap finite-impulse-response (FIR) filter for PW/sub 50/=2 T. Finally a possible adaptive implementation is presented along with a simulation of its convergence with the sign-sign least-mean-square (LMS) algorithm. The proposed equalizer will provide a large savings in die area and power over digital methods.

Keywords

decision feedback equalisers; 4-tap DFE; 5-tap FIR filter; DFE-based disk-drive read channels; adaptive continuous-time forward equalization; convergence; correlation; decision-feedback equalization; die area; disk-drive readback signal; infinite-length DFE; one-zero equalizer; performance; sign-sign least-mean-square algorithm; simulation; Adaptive equalizers; Decision feedback equalizers; Detectors; Finite impulse response filter; Laboratories; Pulse measurements; Pulse shaping methods; Sampling methods; Solid state circuits; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1995. 1995 Conference Record of the Twenty-Ninth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-8186-7370-2

Type

conf

DOI

10.1109/ACSSC.1995.540633

Filename

540633