1. 山东理工大学计算机科学与技术学院,山东,淄博,255049
2. 大连理工大学信息与通信工程学院,辽宁,大连,116024
3. 温州大学物理与电子信息工程学院,浙江,温州,325035
4. 山东理工大学计算机科学与技术学院,山东,淄博,255049
5. 大连理工大学信息与通信工程学院,辽宁,大连,116024
6. 温州大学物理与电子信息工程学院,浙江,温州,325035
纸质出版:2014
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孙文珠, 王洪玉, 祝开艳, 等. 一种规则变量节点度LTCodes编码方案[J]. 电子学报, 2014,42(10):1918-1924.
SUN Wen-zhu, WANG Hong-yu, ZHU Kai-yan, et al. A Novel Encoding Scheme for Regular Variable-Node Degree LT Codes[J]. Acta Electronica Sinica, 2014, 42(10): 1918-1924.
孙文珠, 王洪玉, 祝开艳, 等. 一种规则变量节点度LTCodes编码方案[J]. 电子学报, 2014,42(10):1918-1924. DOI: 10.3969/j.issn.0372-2112.2014.10.008.
SUN Wen-zhu, WANG Hong-yu, ZHU Kai-yan, et al. A Novel Encoding Scheme for Regular Variable-Node Degree LT Codes[J]. Acta Electronica Sinica, 2014, 42(10): 1918-1924. DOI: 10.3969/j.issn.0372-2112.2014.10.008.
LT Codes差错平台(Erasure Floor)由变量节点的最小度决定
规则变量节点度LT Codes能够最大化变量节点的最小度
从而降低LT Codes的差错平台.该文提出一种新的规则变量节点度LT Codes编码方法
该编码方法省去了现有方法中对变量节点度值查找表的排序操作
降低了现有方案的编码复杂度;通过对度分布的修正增加低度校验节点
使得规则变量节点度LT Codes解码瀑布区域(雪崩区域)提前.仿真结果表明该文方法与现有方法相比有效减少了编码时间
降低了成功解码所需的平均传输开销
加快了误符号率收敛速度.
The erasure floor of LT Codes is mainly determined by the minimum degree of variable-nodes.Regular variable-node degree LT Codes can maximize the minimum degree of variable-nodes and improve the erasure floor of LT Codes.In this paper
a novel encoding scheme for regular variable-node degree LT Codes is proposed.Compared with existing methods
the proposed scheme is lightweight due to the elimination of the sorting operations involved in the look-up table.Meanwhile
by adding check nodes with low degree through modifying the degree distribution
the waterfall area (avalanche area) in decoding regular variable-node degree LT Codes is improved.Simulation results show that this scheme reduces the encoding time and the average overhead
and accelerates the convergence rate of symbol error rate curve efficiently.
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