改善3D-Turbo码错误平台性能的不规则抽取方案设计研究 -- 西北工业大学学报,2017,35(3):523-527
论文:2017,Vol:35,Issue(3):523-527
引用本文:
徐娟, 姚如贵, 高凡琪, 陆亚南. 改善3D-Turbo码错误平台性能的不规则抽取方案设计研究[J]. 西北工业大学学报
Xu Juan, Yao Rugui, Gao Fanqi, Lu Ya'nan. Irregular Pattern Design to Improve Error Floor for 3D-Turbo Codes[J]. Northwestern polytechnical university

改善3D-Turbo码错误平台性能的不规则抽取方案设计研究
徐娟1, 姚如贵2, 高凡琪2, 陆亚南2
1. 长安大学 电控学院, 陕西 西安 710064;
2. 西北工业大学 电子信息学院, 陕西 西安 710072
摘要:
针对3D-Turbo码中仍然存在的低码重码字,以全零迭代译码算法作为码字距离谱分析工具,识别低码重信息比特和校验比特中"1"的分布,优化设计不规则抽取模式,进一步提高最小汉明距离,进而改善错误平台性能。最后,以一种3D-Turbo码为实例,利用文中所提的改进抽取方式,将最小码重从18提高到20,证明了改进抽取方案的有效性。
关键词:    信道编码    错误平台    迭代译码    汉明距离   
Irregular Pattern Design to Improve Error Floor for 3D-Turbo Codes
Xu Juan1, Yao Rugui2, Gao Fanqi2, Lu Ya'nan2
1. School of Electronic and Control Engineering, Chang'an University, Xi'an 710064, China;
2. School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710072, China
Abstract:
In 3D-Turbo codes, part of parity bits from conventional Turbo encoder are encoded again by a post-encoder to reduce the number of low-weight codes and achieve better error floor performance. Considering the residual low-weight codes in 3D-Turbo codes, an irregular pattern design is proposed to further improve the error floor. All-zero iterative decoding algorithm is firstly utilized to identify the distribution of "1" in low-weight codes. Then an irregular pattern is optimized based on the distribution to eliminate low-weight codes. Finally, taking a practical 3D-Turbo codes, we adopt the proposed irregular pattern to increase the minimum Hamming distance from 18 to 20, which validates the effectiveness of our contribution.
Key words:    channel coding    error floor    iterative decoding    Hamming distance   
收稿日期: 2016-10-17     修回日期:
DOI:
基金项目: 国家自然科学基金(61501376)、中央高校基本科研业务费专项基金(3102016ZY020、310832151095)和陕西省留学人员科技活动择优资助项目(W021004)资助
通讯作者:     Email:
作者简介: 徐娟(1980-),女,长安大学副教授、博士,主要从事无线通信技术、通信与导航抗干扰研究。
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