Partial-Response Maximum-Likelihood Channel for Mark Edge Recording on Magneto-Optical Disks

Autor:	Michio Matsuura, Haruhiko Izumi, Yoshihide Fujita, Masakazu Taguchi, Akihiro Itakura
Rok vydání:	1996
Předmět:	Physics Partial-response maximum-likelihood Carrier-to-noise ratio business.industry General Engineering General Physics and Astronomy Word error rate Phase margin Magneto optical Optics Detection theory Enhanced Data Rates for GSM Evolution business Communication channel
Zdroj:	Japanese Journal of Applied Physics. 35:459
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.35.459
Popis:	We have developed a partial-response maximum-likelihood (PRML) read channel for mark edge recording on magneto-optical disks. In this paper, we report the results of a computer simulation and an actual experiment using this method and compare them with those of a conventional (level slice [bit-by-bit]) detection method in a leading/trailing-edge-independent reproduction. The PRML read channel can decrease the error rates of signal detection in terms of two factors (phase margin characteristics and error rate characteristics of the carrier-to-noise ratio [C N R]). We found that the PR(1, 1) ML detection method improved the C N R by 1.7 dB over the conventional detection method. With these improvements, we achieved a 30% phase margin at a density of 0.57 µm/mark ( 0.43 µm/bit). Therefore, we improved the capacity of MO disks using the PRML read channel, which decreased the error rates of signal detection for mark edge recording.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f47ee5fe0b2c8f1fdd57a5a3f4223c2 https://doi.org/10.1143/jjap.35.459 Zobrazit plný text záznamu