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Proceedings Paper

Adaptive partial response (PR) signaling for magneto-optic (MO) read channels in the presence of transition noise
Author(s): Inci Ozgunes; Bhagavatula Vijaya Kumar
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Paper Abstract

Magneto-optic (MO) recording can benefit from partial response (PR) spectral shaping of the readback signal to achieve higher recording densities for similar reasons that PR signaling applies well to magnetic recording. We compare various PR equalization schemes by using the bit error rate (BER) as a means of comparison. We also compare the adaptive partial response maximum-likelihood (PRML) detection schemes in the presence of additive white Gaussian noise (AWGN) and transition noise. Our conclusions are for densities in the range of 50 - 60 kbpi, for disks with carrier-to-noise ratio (CNR) of 50 dB and optical system with full width at half maximum (FWHM) of 0.68 micrometer. We show results which indicate that PR1 equalized signals followed by the Viterbi algorithm have the best performance. They not only perform well in the absence of transition noise, but also do well in the presence of transition noise up to 12 ns.

Paper Details

Date Published: 8 December 1995
PDF: 7 pages
Proc. SPIE 2605, Coding and Signal Processing for Information Storage, (8 December 1995); doi: 10.1117/12.228218
Show Author Affiliations
Inci Ozgunes, Carnegie Mellon Univ. (United States)
Bhagavatula Vijaya Kumar, Carnegie Mellon 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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