用于体全息存储系统的纠错编码及数据交错技术  

INTERLEAVING AND ERROR CORRECTING IN VOLUME HOLOGRAPHIC DATA STORAGE

作　　者：裴先登[1] 李伟 谢长生 

机构地区：[1]华中科学技术大学计算机学院,武汉430074

出　　处：《计算机研究与发展》2002年第10期1393-1398,共6页Journal of Computer Research and Development

基　　金：国家重点基础研究发展规划高技术项目基金资助 ( G1 9990 30 1 0 6 )

摘　　要：体全息存储系统具有存储容量大、数据传输率高、存取时间短和可快速进行图像匹配及内容相关寻址操作等特点 .但要成为特性优良的通用型信息存储系统 ,就必须以可接受的误码率同时满足这些性能指标 (计算机外存储器的基本要求是使用户误码率低于 10 - 12 ) .如此 ,仅靠光学设计不是高性价比方法 .设计恰当的纠错编码和数据交错技术可以减轻对原始误码率的要求 ,缓解对系统设计、部件质量等方面的要求 ,在不牺牲其它系统目标的情况下 ,使 10 - 5的原始误码率达到 10 - 12的最终误码率水平 .Volume holographic storage has the potential to offer high density, fast data readout, and associative content addressable storage. But in order to make it a general-purpose data storage system, it is very important to attain these desirable goals simultaneously with the acceptable bit error rate (BER)(10 -12). Careful engineering of the optics alone is not generally the most cost-effective solution to reducing the BER to the target value. A properly designed error correcting code and interleaving can alleviate the requirements for the BER,relax the requirements for system design and quality of the components, and correct a 10 -5 raw BER to the 10 -12 level without sacrificing other system goals. Studied in this paper are the noise and error sources in digital volume holographic data storage channel, and the error-correcting codes and the two-dimensional interleaving for volume holographic storage systems.

关 键 词：体全息存储系统 纠错编码 数据交换 信息存储系统 

分 类 号：TP333.42[自动化与计算机技术—计算机系统结构]