Partial-Response Maximum-Likelihood Channel for Mark Edge Recording on Magneto-Optical Disks.
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- Taguchi Masakazu
- Optical Disks Laboratory, Personal System Laboratories, Fujitsu Laboratories Ltd., 64 Nishiwaki, Ookubocho, Akasi 674, Japan
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- Itakura Akihiro
- Optical Disks Laboratory, Personal System Laboratories, Fujitsu Laboratories Ltd., 64 Nishiwaki, Ookubocho, Akasi 674, Japan
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- Fujita Yoshihide
- Optical Disks Laboratory, Personal System Laboratories, Fujitsu Laboratories Ltd., 64 Nishiwaki, Ookubocho, Akasi 674, Japan
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- Izumi Haruhiko
- Optical Disks Laboratory, Personal System Laboratories, Fujitsu Laboratories Ltd., 64 Nishiwaki, Ookubocho, Akasi 674, Japan
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- Matsuura Michio
- Optical Disks Laboratory, Personal System Laboratories, Fujitsu Laboratories Ltd., 64 Nishiwaki, Ookubocho, Akasi 674, Japan
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抄録
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 [CNR]). We found that the PR(1, 1) ML detection method improved the CNR by 1.7 dB over the conventional detection method. With these improvements, we achieved a 30% phase margin at a density of 0.57 µ m/mark ( 0.43 µ m/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.
収録刊行物
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 35 (1B), 459-465, 1996
The Japan Society of Applied Physics
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詳細情報 詳細情報について
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- CRID
- 1390001206245649408
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- NII論文ID
- 110003955374
- 210000039650
- 130004522233
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- NII書誌ID
- AA10457675
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- ISSN
- 13474065
- 00214922
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可