基于规则变量节点度LT码的协作传输

系统工程与电子技术

基于规则变量节点度LT码的协作传输

祝开艳1,2, 王洪玉1, 孙文珠3, 宋维波2

(1. 大连理工大学电子信息与电气工程学部, 辽宁大连 116024;
2. 大连海洋大学信息工程学院, 辽宁大连 116023;
3. 山东理工大学计算机科学与技术学院, 山东淄博255049)

出版日期:2015-04-23 发布日期:2010-01-03

Cooperative transmission with regular variablenode degree LT codes

ZHU Kaiyan1,2, WANG Hongyu1, SUN Wenzhu3, SONG Weibo2

(1.Faculty of Electronics Information and Electronical Engineering, Dalian University of Technology, 
Dalian 116024, China; 2.College of Information Engineering, Dalian Ocean University,
Dalian 116023, China; 3.College of Computer Science and Technology,
Shangdong University of Technology, Zibo 255049, China)

Online:2015-04-23 Published:2010-01-03

摘要/Abstract

摘要：

规则变量节点度Luby变换（Luby transform, LT）码能够改善传统LT码编码过程中随机选取邻居节点方式导致的差错平台现象。提出一种新的实现规则变量节点度LT的编码方法,利用数组的赋值和清空操作来实现信息符号度值规则化,降低了现有方法的编码复杂度,并利用对度分布的修正来改善解码瀑布区;将该编码方法应用到协作通信系统中,并分析了误符号率性能。实验结果表明,此方法能节省系统编解码时间,有效降低误符号率差错平台,减少成功解码所需的平均传输开销。

Abstract:

Regular variablenode degree Luby transform (LT)codes can reduce the erasure floor of traditional LT codes, which are caused by choosing neighbor nodes randomly in the encoding process. A novel encoding scheme for regular variablenode degree LT codes is proposed. Compared with existing methods, the proposed scheme utilizes assignments and empty operation for arrays to realize the regulation of information symbol value, reducing the complexity of existing methods. Meanwhile, by modifying the degree distribution, the waterfall area(avalanche area)in decoding regular variablenode degree LT codes is improved. Finally, the proposed coding method is applied to the cooperative communication system, and the symbol error rate is analyzed. Experimental results show that this scheme can save system coding time, effectively reduce the symbol error rate erasure floor, and decrease the average transmission overhead required for the successful decoding.

祝开艳1,2, 王洪玉1, 孙文珠3, 宋维波2. 基于规则变量节点度LT码的协作传输[J]. 系统工程与电子技术.

ZHU Kaiyan1,2, WANG Hongyu1, SUN Wenzhu3, SONG Weibo2. Cooperative transmission with regular variablenode degree LT codes[J]. Systems Engineering and Electronics.