电讯技术2017，Vol.57Issue(11)：1246-1250,5.DOI:10.3969/j.issn.1001-893x.2017.11.003
LDPC码的一种高效加权比特翻转译码算法
An Efficient Weighted Bit Flipping Decoding Algorithm of LDPC Codes
摘要
Abstract
The weighted bit flipping ( WBF ) decoding algorithm of low density parity-check ( LDPC ) codes produces the single-bit flipping phenomenon during the iteration in most cases,which can result in the low decoding efficiency and may give rise to the "endless loop" of the bit flipping. For this phenome-non, a more efficient WBF( EWBF) algorithm is proposed. The proposed EWBF algorithm has improved the flipping threshold so as to flip the multiple-bit in each iteration and improve the decoding efficiency while avoiding the"endless loop" phenomenon during the decoding. Simulation results show that the aver-age decoding iteration number of the proposed decoding algorithm, compared with the WBF algorithm, the modified WBF(MWBF) algorithm and the Improved MWBF(IMWBF) algorithm, can be reduced 51. 6%~56. 2%, 49. 6% ~54. 2% and 48. 1% ~51. 3%. In terms of the decoding performance, the proposed algorithm's performance is close to or even better than the IMWBF algorithm's. When the maximum itera-tion number is set to 30 times, the net coding gain of the improved scheme is 0. 92 dB better than that of IMWBF algorithms at the bit error rate( BER) of 10-4 .关键词
低密度奇偶校验码/加权比特翻转译码/死循环/翻转阈值Key words
low density parity-check ( LDPC) code/weighted bit flipping ( WBF)/endless loop/flipping threshold分类
信息技术与安全科学引用本文复制引用
袁建国,曾磊,孙雪敏,胡潇月,郭乔,吴英冬..LDPC码的一种高效加权比特翻转译码算法[J].电讯技术,2017,57(11):1246-1250,5.基金项目
国家自然科学基金资助项目(61472464) （61472464）
重庆市基础与前沿研究计划项目(cstc2015jcyjA0554) （cstc2015jcyjA0554）
2016年重庆邮电大学大学生科研训练计划项目(A2016-61) （A2016-61）
