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Write-read-write signal precompensation techniques for magnetic recording
Written by:
Joseph A. O'Sullivan,
Dakshi Agrawal,
Ronald S. Indeck,
and
Marcel W. Muller.
Citation:
Proceedings of SPIE (Coding and Signal Processing for Information
Storage), pages 39-47, 1995.
Abstract:
Medium noise in magnetic recording has been shown to be caused in part
by the magetic 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 medum 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 writen on the medium and the noise power.
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United States
