RAM-search algorithms for nonlinear ISI cancellation in magnetic recording

Ali Ghrayeb, William E. Ryan

Research output: Contribution to journalArticle

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
Pages (from-to)3368-3372
Number of pages5
JournalConference Record / IEEE Global Telecommunications Conference
Volume6
Publication statusPublished - 1998
Externally publishedYes

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Intersymbol interference
Magnetic recording
Data storage equipment
Decision feedback equalizers
Nonlinear distortion
Decision making
decision making

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change

Cite this

RAM-search algorithms for nonlinear ISI cancellation in magnetic recording. / Ghrayeb, Ali; Ryan, William E.

In: Conference Record / IEEE Global Telecommunications Conference, Vol. 6, 1998, p. 3368-3372.

Research output: Contribution to journalArticle

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