Two-Dimensional Partial Response Maximum Likelihood with Constant-Weight Constraint for Holographic Data Storage
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概要
- 論文の詳細を見る
The areal density of holographic memory can be increased by decreasing the aperture size of the optical system; however, this causes the deterioration of a reproduced image due to the elimination of the high-frequency components of the image. We have developed two-dimensional partial response maximum likelihood (2D PRML), which is based on the previously proposed “decision feedback Viterbi algorithm” and added the new idea of the “constant-weight constraint (CW constraint)” and the “amplitude PR method”. We have confirmed the improvement in error rate using 2D PRML compared with the conventional differential detection method in a high-density holographic memory system by simulation.
- 2008-07-25
著者
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Takahashi Akira
Advanced Technology Research Laboratories Corporate R&d Group Sharp Corporation
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Murakami Yoshiteru
Advanced Technology Research Laboratories, Sharp Corporation, Tenri, Nara 632-8567, Japan
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Murakami Yoshiteru
Advanced Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan
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Akiyama Jun
Advanced Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan
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Maeda Shigemi
Advanced Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan
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Hayashi Tetsuya
Advanced Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan
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Hayashi Tetsuya
Advanced Technology Research Laboratories, Sharp Corporation, Tenri, Nara 632-8567, Japan
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Okumura Tetsuya
Advanced Technology Research Laboratories, Sharp Corporation, Tenri, Nara 632-8567, Japan
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Maeda Shigemi
Advanced Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan
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Maeda Shigemi
Advanced Technology Research Laboratories, Sharp Corporation, Tenri, Nara 632-8567, Japan
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Akiyama Jun
Advanced Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan
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Akiyama Jun
Advanced Technology Research Laboratories, Sharp Corporation, Tenri, Nara 632-8567, Japan
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