文章基本信息

标题：Low Rate QC LDPC Codes with Reconfigurable Structures for Space Information Networks
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作者：Jianrong Bao ; Jianrong Bao ; Xiqi Gao 等
期刊名称：Journal of Communications
印刷版ISSN：1796-2021
出版年度：2016
卷号：11
期号：3
页码：255-262
DOI：10.12720/jcm.11.3.255-262
语种：English
出版社：ACADEMY PUBLISHER
摘要：This paper presents the construction of the efficient low rate Quasi-Cyclic (QC) Low-Density Parity-Check (LDPC) codes and their reconfigurable structures for space information networks. The code is firstly produced by a seed Accumulate-Repeat-Accumulate (ARA) protograph and then extended to a QC generalized LDPC code, where a parity check node pair is replaced with a more powerful pre-coding Hamming node. The code matrix is optimized by both the Progressive Edge progressive (PEG) and the QC oriented modified approximate cycle extrinsic message degree (QC-MACE) algorithm. The QC form in the code saves much storage and reduces coding complexity greatly. The reconfigurable code structure is also given and it can be used in variable space channels. Simulation results show that the proposed code obtains 0.05 dB gain and has better error floor, when compared to the Turbo code in the Consultative Committee for Space Data Systems (CCSDS) with same parameters at a Bit-Error-Rate (BER) of 10~(-5). And the coding gain is also about 0.1 dB over that of the currently low rate and short QC LDPC codes at a BER of 10~(-5). Besides, it has good features of low decoding complexity and low latency and so on.
关键词：QC LDPC codes;protograph;PEG;QC-MACE