标题：A novel encoding scheme for regular variable-node degree LT codes
作者：Sun, Wen-Zhu ;Wang, Hong-Yu ;Zhu, Kai-Yan ;Wang, Jie ;Tang, Zhen-Zhou
作者机构：[Sun, Wen-Zhu ] College of Computer Science and Technology, Shandong University of Technology, Zibo; Shandong; 255049, China;[Tang, Zhen-Zhou ] Colleg 更多
来源：Tien Tzu Hsueh Pao/Acta Electronica Sinica
摘要：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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