并行级联空间耦合RA码的设计

2020 IEEE 3rd International Conference on Electronic Information and Communication Technology (ICEICT) Pub Date : 2020-11-13 DOI:10.1109/ICEICT51264.2020.9334198

Yang Liu, Xin Liu, Shuang Cheng, Yuzhi Zhang

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引用次数: 0

摘要

本文在空间耦合RA (SCRA)码的基础上，提出了并行级联空间耦合RA (PC-SCRA)码，该码具有编码结构简单、阈值饱和、译码复杂度低等优点。编码时，由两个相同的SCRA码分别对相同的消息位进行编码，以获得各自的校验位。在传输过程中，消息位和得到的校验位合并成一个码字进行传输。此外，提出密度进化算法计算PC-SCRA码集在二进制擦除信道上的迭代译码阈值。仿真结果表明，所提出的PC-SCRA码集具有接近Shannon极限的BP阈值性能，优于具有相同码率的空间耦合LDPC码(SC-LDPC)，为构建容量逼近的SC-LDPC码提供了一种新的方法。

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Design of Parallelly Concatenated Spatially Coupled RA Codes

In this paper, parallelly concatenated spatially coupled RA (PC-SCRA) codes was presented based on spatially coupled RA (SCRA) codes with the advantages of simple coding structure, threshold saturation and low decoding complexity. When encoding, the same message bits are respectively encoded by two same SCRA codes to obtain respective check bits. During transmission, the message bits and the obtained parity bits are merged into one codeword for transmission. Besides, density evolution algorithm was proposed to compute the iterative decoding threshold of PC-SCRA code ensemble over the binary erasure channel. Simulation results show that the proposed PC-SCRA code ensemble has excellent BP threshold performance close to Shannon limit and is superior to the spatially coupled LDPC (SC-LDPC) code with same coderate, which provides a new way for construrting capacity-approaching SC-LDPC codes.

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2020 IEEE 3rd International Conference on Electronic Information and Communication Technology (ICEICT)

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