An improved detector for channels with nonlinear intersymbol interference

Author

Sands, Nicholas P. ; Cioffi, John M.

Author_Institution

Inf. Syst. Lab., Stanford Univ., CA, USA

fYear

1994

fDate

1-5 May 1994

Firstpage

1226

Abstract

The magnetic storage channel exhibits nonlinear intersymbol interference (ISI) at high recording density, which can seriously degrade performance compared to a similar channel with purely linear distortion. The decision feedback equalizer with RAM feedback (RAM-DFE) has been suggested as a receiver for these nonlinear channels, however its performance is limited to canceling the strictly post-cursor nonlinear ISI. We suggest an enhancement to RAM-DFE which can further reduce the effects of nonlinear ISI. Past decisions are combined with channel output samples in the forward filter of a modified DFE to form a nonlinear estimator for the current symbol

Keywords

decision feedback equalisers; filtering theory; intersymbol interference; magnetic recording; magnetic storage; signal detection; telecommunication channels; ISI; RAM feedback; RAM-DFE; channel output samples; decision feedback equalizer; detector; forward filter; high recording density; linear distortion; magnetic storage channel; nonlinear channels; nonlinear estimator; nonlinear intersymbol interference; performance; receiver; Decision feedback equalizers; Detectors; Filters; Information systems; Intersymbol interference; Nonlinear distortion; Random access memory; Read-write memory; Shift registers; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-1825-0

Type

conf

DOI

10.1109/ICC.1994.368907

Filename

368907