Jpn. J. Appl. Phys. 46 (2007) pp. 3812-3815 |Previous Article| |Next Article| |Table of Contents|
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A Modified Low-Density Parity-Check Decoder for Holographic Data Storage System
Digital Media Lab., Daewoo Electronics Corp., 543 Dangjeong, Kunpo, Kyonggi 435-733, Korea
1Education-Research-Industry Cluster at Ansan, Hanyang University, 1271 Sa-1, Sangrok, Ansan, Kyonggi 426-791, Korea
(Received November 20, 2006; accepted February 15, 2007; published online June 22, 2007)
A modified low-density parity-check decoding scheme for holographic data storage has been developed and evaluated. It compensates the negative effect from neighboring pixels during the iterative decoding process, which improves the overall error-correction performance when pixels are misaligned. A simulation shows that the proposed scheme outperforms a conventional log-likelihood-ratio (LLR) belief-propagation (BP) algorithm.
KEYWORDS:holographic data storage, low-density parity-check code, LLR BP algorithm, pixel misalignment, page format
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