Concatenated Spatially Coupled LDPC Codes for Joint Source-Channel Coding

Concatenated Spatially Coupled LDPC Codes for Joint Source-Channel Coding
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DOI：
10.1109/isit.2018.8437885
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发表时间：
2018-06
期刊：
2018 IEEE International Symposium on Information Theory (ISIT)
影响因子：
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通讯作者：
A. Golmohammadi;David G. M. Mitchell
A. Golmohammadi;David G. M. Mitchell
中科院分区：
其他
文献类型：
--
作者：
A. Golmohammadi;David G. M. Mitchell

文献摘要

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研究了一种基于级联空间耦合低密度校验码(SC-LDPC)的联合信源信道编码(JSCC)方法。提出了一种由两个SC-LDPC码组成的结构：一个用于信源编码，另一个用于信道编码，并采用基于联合信任传播的译码。此外，还提出了一种新的加窗译码方案，大大降低了时延和复杂度要求。仿真结果表明，与现有的基于LDPC码的联合SCC方案相比，性能有了显著的提高。
In this paper, a method for joint source-channel coding (JSCC) based on concatenated spatially coupled low-density parity-check (SC-LDPC) codes is investigated. A construction consisting of two SC-LDPC codes is proposed: one for source coding and the other for channel coding, with a joint belief propagation-based decoder. Also, a novel windowed decoding (WD) scheme is presented with significantly reduced latency and complexity requirements. Simulation results show a notable performance improvement compared to existing state-of-the-art JSCC schemes based on LDPC codes.