体全息存储中二维交错编码技术的研究及实现

Two-dimensional Interleaving Scheme for Volume Holographic Data Storage

为了克服和纠正体全息存储系统中大量的随机错误和突发错误 ,数据在按“页面”为单位存入系统时 ,通常采用纠错编码、交错和调制相结合的编码方式来进行信息组页 文中提出了一种二维交错技术用于克服数据“页面”存在的突发错误 ,以提高纠错编码的纠错能力 ,并通过FPGA实现了块交错RS(2 5 5 ,2 2 3)编码码字在数据“页面”

In order to defend burst errors and random errors in the volume holographic storage system, information is encoded in the form of binary data pages which include modulation channel coding, data interleaving and error correction. A two-dimensional interleaving technique that can correct two-dimensional bursts (or clusters) of errors for volume holographic storage is presented. By adopting high speed FPGA, two-dimensional block-interleaved RS(255,223) codes are created based on t-interleaved arrays of integers, which defined by the property that every connected component of area t consists of distinct codewords.