| 基于围长约束与EMD的低错误平层LDPC码构造方法 |
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| 引用本文： | 袁建国,王宏森,张希瑞,范福卓,袁梦.基于围长约束与EMD的低错误平层LDPC码构造方法[J].重庆邮电大学学报(自然科学版),2021,33(1):67-72. |
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| 作者姓名： | 袁建国 王宏森 张希瑞 范福卓 袁梦 |
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| 作者单位： | 重庆邮电大学 光通信与网络重点实验室,重庆400065;重庆邮电大学 光通信与网络重点实验室,重庆400065;重庆邮电大学 光通信与网络重点实验室,重庆400065;重庆邮电大学 光通信与网络重点实验室,重庆400065;重庆邮电大学 光通信与网络重点实验室,重庆400065 |
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| 基金项目： | 国家自然科学基金（61471075）；重庆市教委科学技术研究项目（KJQN201800607）；重庆邮电大学大学生科研训练计划项目（A2018-66） |
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| 摘 要： | 针对低密度奇偶校验(low-density parity-check,LDPC)码在高信噪比区域可能存在错误平层的缺点,利用渐进边增长(progressive edge growth,PEG)算法的思想,基于围长约束和额外信息度(extrinsic message degree,EMD)提出了一种围长为8的LDPC码构造方法,该方法所构造的PEG-GA-EMD(PGAE)-LDPC码不存在四环和六环且具有优越的纠错性能.仿真结果表明,该方法所构造的码率分别为0.5和0.67的PEG-GA-EMD(PGAE)-LDPC(3024,1512)码和PGAE-LDPC(1200,800)码能有效改善高信噪比区域的纠错性能,且未出现明显的错误平层.
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| 关 键 词： | 低密度奇偶校验(LDPC)码 渐进边增长(PEG)算法 额外信息度(EMD) 错误平层 |
| 收稿时间： | 2019/1/14 0:00:00 |
| 修稿时间： | 2020/6/24 0:00:00 |
Construction method of LDPC codes based on girth constraint and EMD with the low error floor |
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| YUAN Jianguo,WANG Hongsen,ZHANG Xirui,FAN Fuzhuo,YUAN Meng.Construction method of LDPC codes based on girth constraint and EMD with the low error floor[J].Journal of Chongqing University of Posts and Telecommunications,2021,33(1):67-72. |
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| Authors: | YUAN Jianguo WANG Hongsen ZHANG Xirui FAN Fuzhuo YUAN Meng |
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| Institution: | Key Laboratory of Optical Communication and Networks, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China |
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| Abstract: | In order to solve the shortcomings that there may be an error floor of low-density parity-check (LDPC) codes in the higher signal-to-noise ratio (SNR) region, a new construction method of LDPC codes with girth-8 is proposed with the idea of the progressive edge growth (PEG) algorithm based on the girth constraints and extrinsic message degree (EMD). There is no girth-4 and girth-6 in the PEG-GA-EMD(PGAE)-LDPC codes with excellent error correction performance constructed by the proposed construction method. The simulation results show that the PGAE-LDPC(3 024, 1 512) code with code-rate of 0.5 and the PGAE-LDPC(1 200,800) code with code-rate of 0.67 constructed by the construction method can effectively improve the error correction performance of the higher SNR region without the obvious error floor. |
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| Keywords: | low-density parity-check codes progressive edge growth algorithm extrinsic message degree error floor |
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