Hybrid multinary modulation codes for page-oriented holographic data storage
Hybrid multinary modulation codes for page-oriented holographic data storage
复制标题
用于面向页面的全息数据存储的混合多元调制代码
DOI：
10.1088/1464-4258/10/11/115305
复制
发表时间：
2008
影响因子：
2.1
通讯作者：
C. Denz
中科院分区：
文献类型：
--
作者：
G. Berger;M. Dietz;C. Denz
提出了用于在面向页的全息存储系统中实现的混合多元块代码。这些代码利用组合的相位和幅度调制来对输入数据进行编码。与纯幅度或纯相位调制块码设计相比，混合多元调制编码允许我们在错误率不变的情况下增加存储密度。介绍了两种不同的混合调制码设计。彻底讨论了实验实现，特别是集中在读出概念上。相位分辨读出是通过光学加法和减法，使用未调制的参考页来完成的。实验结果表明，总体错误率通常主要由与幅度检测相关的错误主导。研究表明，当将相位调制与二元或三元幅度调制结合使用时，容量增益高达 31% 或 47% 是合理的。
Hybrid multinary block codes for implementation in page-oriented holographic storage systems are proposed. The codes utilize combined phase and amplitude modulations to encode input data. In comparison to pure amplitude-or pure phase-modulated block code designs hybrid multinary modulation coding allows us to augment the storage density at an unchanged error rate. Two different hybrid modulation code designs are introduced. Experimental implementation is thoroughly discussed, especially concentrating on readout concepts. Phase-resolved readout is accomplished by optical addition and subtraction, using an unmodulated reference page. Experimental results indicate that the overall error rate is usually dominated by errors related to amplitude detection. The study suggests that capacity gains of up to 31% or 47% are reasonable when utilizing phase modulations in conjunction with binary or ternary amplitude modulation.