標題: A Gray Level Weighting Method to Reduce Optical Aberration Effect in Holographic Data Storage System
作者: Ou-Yang, Mang
Chen, Yu-Ta
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Alignment method;fiducial point;gravity center;holographic data storage
公開日期: 1-Mar-2011
摘要: An alignment method for holographic data storage system (HDSS) is proposed in this paper. Due to several types of noises encountered in the HDSS, the signal-to-noise ratio (SNR) is degraded. Errors can be corrected using a channel code for some sorts of noise, while it may require a high quality optical system to reduce the error probability for the other types of noise. A checkerboard pattern is proposed using intensity weighting to find the fiducial points, which could work in a lower SNR system and thus reduce the error likelihood effectively. Reed-solomon (RS) code and oversampling are both made available in the HDSS. As a consequence, the aberration effects are eliminated using the fiducial points, leading to a low SNR system clear of errors after performing decoding. The lowest SNR system is out of error-free recovery condition, so that all the alignment methods proposed in this paper could not reduce the aberration effects to restore the images into the original data.
URI: http://dx.doi.org/10.1109/TMAG.2010.2096462
http://hdl.handle.net/11536/463
ISSN: 0018-9464
DOI: 10.1109/TMAG.2010.2096462
期刊: IEEE TRANSACTIONS ON MAGNETICS
Volume: 47
Issue: 3
起始頁: 546
結束頁: 550
Appears in Collections:Conferences Paper


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