LT码中一种新的开关度分布

doi:10.3969/j.issn.1001-2400.2015.05.008

J4 ›› 2015, Vol. 42 ›› Issue (5): 43-47.doi: 10.3969/j.issn.1001-2400.2015.05.008

LT码中一种新的开关度分布

任鹏;相征

(西安电子科技大学通信工程学院，陕西西安 710071)

收稿日期:2014-05-05 出版日期:2015-10-20 发布日期:2015-12-03
通讯作者: 任鹏
作者简介:任鹏(1984-)，男，西安电子科技大学博士研究生，E-mail：pren@stu.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(61072102)

New switch degree distribution for the LT code

REN Peng;XIANG Zheng

(School of Telecommunication Engineering, Xidian Univ., Xi'an 710071, China)

Received:2014-05-05 Online:2015-10-20 Published:2015-12-03
Contact: REN Peng

摘要/Abstract

摘要：

针对LT喷泉码，为进一步增加小度值的可译码集出现概率，限制二进制指数度分布的最大度值，提出了截短二进制指数度分布; 为进一步增加大度值的可译码集出现概率，改变鲁棒孤子度分布的分布值，提出了滑动的鲁棒孤子度分布．结合这两种度分布，建立了一种新的开关度分布．仿真结果表明，新的开关度分布进行LT编码时的初始译码成功率达到了56％，整体译码成功率高于原始的开关度分布约9％～12％．

关键词: 数字喷泉码, 二进制指数度分布, 鲁棒孤波度分布, 开关度分布

Abstract:

Truncated-binary exponential distribution is proposed for improving the occurrence of the decoding set, and Moved-robust soliton distribution is simultaneously put forward for increasing the occurrence of the decoding set. Combining the above two distributions, a new switch distribution is constructed in this paper. Simulation results show that the proposed method can reach 56％ of initial decoding success, and that the total decoding success rate is higher than that by the original method by 9％～12％.

Key words: digital fountain code, binary exponential distribution, robust soliton distribution, switch distribution

任鹏;相征. LT码中一种新的开关度分布[J]. J4, 2015, 42(5): 43-47.

REN Peng;XIANG Zheng. New switch degree distribution for the LT code[J]. J4, 2015, 42(5): 43-47.

参考文献

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LT码中一种新的开关度分布

New switch degree distribution for the LT code

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