RAM-search algorithms for nonlinear ISI cancellation in magnetic recording

Ali Ghrayeb, William E. Ryan

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

We discuss two algorithms for mitigating the deleterious effects of nonlinear intersymbol interference (ISI) in PR4- and EPR4-equalized magnetic recording channel. We call them RAM-Search algorithms as they borrow the idea of employing a RAM (random access memory) from the RAM-DFE, and because they involve a search. The algorithms have been devised to circumvent the error propagation problem that arises in making tentative decisions in ISI cancellers used together with partial response signaling. Adopting a simple partial erasure model for the magneto-inductive head and a third-order polynomial model for the magneto-resistive head to represent the nonlinear distortion, we show that improvements of about 3 dB are possible.

Original languageEnglish
Pages3368-3372
Number of pages5
Publication statusPublished - 1 Dec 1998
EventProceedings of the IEEE GLOBECOM 1998 - The Bridge to the Global Integration - Sydney, NSW, Aust
Duration: 8 Nov 199812 Nov 1998

Conference

ConferenceProceedings of the IEEE GLOBECOM 1998 - The Bridge to the Global Integration
CitySydney, NSW, Aust
Period8/11/9812/11/98

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change

Cite this

Ghrayeb, A., & Ryan, W. E. (1998). RAM-search algorithms for nonlinear ISI cancellation in magnetic recording. 3368-3372. Paper presented at Proceedings of the IEEE GLOBECOM 1998 - The Bridge to the Global Integration, Sydney, NSW, Aust, .