New Prml for Asymmetrical Signals in High-Density Optical Disks
Abstract
The partial response maximum-likelihood (PRML) signal processing technique is effective for high-density recording media. However, asymmetry in the playback signal, which is caused not only by inter-symbol interference, but also by mismatched recording power in phase-change optical disks, markedly degrades the quality of PRML signal processing. In this paper, we propose an adaptive equalizer with a LMS algorithm for asymmetrical signals. We show the improved results in recording and playback experiments.
- Publication:
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Japanese Journal of Applied Physics
- Pub Date:
- March 2002
- DOI:
- 10.1143/JJAP.41.1787
- Bibcode:
- 2002JaJAP..41.1787M