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Proceedings Paper

Write-read-write signal precompensation techniques for magnetic recording
Author(s): Joseph A. O'Sullivan; Dakshi Agrawal; Ronald S. Indeck; Marcel W. Muller
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Paper Abstract

Medium noise in magnetic recording has been shown to be caused in part by the magnetic microstructure of the medium, which is determined at the time of manufacture of the medium. Systems can be designed to exploit this spatial dependence to increase recording density. Signal precompensation to achieve this is described here using two possible models for medium noise: additive and multiplicative. Based upon recent experimental results, the multiplicative model should be the more realistic of the two models, and hence is discussed in more detail. The anticipated increase in performance is quantified in terms of the signals written on the medium and the noise power.

Paper Details

Date Published: 8 December 1995
PDF: 9 pages
Proc. SPIE 2605, Coding and Signal Processing for Information Storage, (8 December 1995); doi: 10.1117/12.228242
Show Author Affiliations
Joseph A. O'Sullivan, Washington Univ. (United States)
Dakshi Agrawal, Washington Univ. (United States)
Ronald S. Indeck, Washington Univ. (United States)
Marcel W. Muller, Washington Univ. (United States)


Published in SPIE Proceedings Vol. 2605:
Coding and Signal Processing for Information Storage
Raghuveer M. Rao; Soheil A. Dianat; Steven W. McLaughlin; Martin Hassner, Editor(s)

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