分布式存储和分集应用的空间耦合

2015 5th International Conference on Communications and Networking (COMNET) Pub Date : 2015-11-01 DOI:10.1109/COMNET.2015.7566624

Fanny Jardel, J. Boutros, Volkan Dedeoglu, M. Sarkiss, G. R. Othman

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引用次数: 5

摘要

对于擦除信道，考虑使用低密度的奇偶校验码，主要是包含特殊类型校验节点的Root-LDPC码。在具有4个块擦除状态、最大设计速率为3/4的信道中，对根- ldpc集成的奇偶位进行了空间耦合，实现了双分集。空间耦合的优势体现在擦除平面上，作为阈值边界的改进，在独立擦除下。空间耦合保持双分集，因为它只连接奇偶位。这种部分耦合的缺点是阈值边界对容量边界的弱饱和。

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Spatial coupling for distributed storage and diversity applications

Low-density parity-check codes are considered for erasure channels, mainly Root-LDPC codes that include a special type of checknodes. Spatial coupling is applied on parity bits of a Root-LDPC ensemble designed for a channel with 4 block-erasure states and a maximal design rate of 3/4 attaining double diversity. The advantage of spatial coupling is shown in the erasure plane as an improvement of a threshold boundary, under independent erasures. The spatial coupling maintains the double diversity because it connects parity bits only. The drawback of this partial coupling is a weak saturation of the threshold boundary towards the capacity boundary.

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2015 5th International Conference on Communications and Networking (COMNET)

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