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Marker Codes on BPMR Write Channel With Data-Dependent Written-in Errors

机译:具有数据相关的写入错误的BPMR写通道上的标记代码

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摘要

The performance of bit-patterned media recording is limited, in part, by written-in errors in the write channel, which has recently been modeled by a channel introducing data-dependent insertion, deletion, and substitution (DIDS) errors. The Davey-MacKay (DM) construction has shown promising error performance on the DIDS channel, where synchronization errors are sparse and burst error lengths before and after each synchronization error are short. In this paper, we consider marker codes with a nonbinary low-density parity-check code as the outer code for the DIDS channel. Our contributions are twofold. First, we propose two computationally efficient inner decoding schemes for the DM and marker code constructions. One is suitable when the burst errors in the DIDS channel are short, and the other when the burst errors are long. Second, our computer simulations show that marker codes can increasingly outperform DM codes as the burst error length increases, and thus provide greater robustness against burst errors on the DIDS channel.
机译:位模式媒体记录的性能部分受限于写入通道中的写入错误,最近已通过引入数据相关的插入,删除和替换(DIDS)错误的通道对写入通道中的写入错误进行了建模。 Davey-MacKay(DM)结构在DIDS通道上显示出令人鼓舞的错误性能,其中同步错误稀疏,每个同步错误前后的突发错误长度都很短。在本文中,我们将带有非二进制低密度奇偶校验码的标记码视为DIDS通道的外部码。我们的贡献是双重的。首先,我们为DM和标记代码构造提出了两种计算有效的内部解码方案。一种适用于DIDS通道中的突发错误较小的情况,另一种适用于突发错误较长的情况。其次,我们的计算机仿真表明,随着突发错误长度的增加,标记代码可以越来越胜过DM代码,从而在DIDS通道上提供了更高的鲁棒性来抵抗突发错误。

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