8 December 1995 Adaptive partial response (PR) signaling for magneto-optic (MO) read channels in the presence of transition noise
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Proceedings Volume 2605, Coding and Signal Processing for Information Storage; (1995) https://doi.org/10.1117/12.228218
Event: Photonics East '95, 1995, Philadelphia, PA, United States
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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Inci Ozgunes, Bhagavatula Vijaya Kumar, "Adaptive partial response (PR) signaling for magneto-optic (MO) read channels in the presence of transition noise", Proc. SPIE 2605, Coding and Signal Processing for Information Storage, (8 December 1995); doi: 10.1117/12.228218; https://doi.org/10.1117/12.228218
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