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Work in progress: Improving the intermediate recovery rate of LT codes using a novel degree distribution

  • Beihang University

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

The belief propagation (BP) decoding of LT codes on BEC recovers only a small subset of the source symbols when the overhead is smaller than a particular value, at which point an avalanche of decoding takes place. In this paper, a degree distribution modification method is proposed to solve this problem. The encoder adopting the modified degree distribution equals to an encoder adopting the original degree distribution which produces the encoded symbols from the original source symbols and some so-called known symbols, whose values are known to both encoder and decoder. The mean degree of the modified degree distribution is always smaller than that of the original one. Theoretical analysis gives the improvement of the intermediate recovery rate. Simulation results show that the proposed modification method is effective to Robust degree distributions and the fixed degree distribution, on both BEC and AWGN channels.

源语言英语
主期刊名Proceedings of the 2014 9th International Conference on Communications and Networking in China, CHINACOM 2014
出版商Institute of Electrical and Electronics Engineers Inc.
252-255
页数4
ISBN(电子版)9781479959709
DOI
出版状态已出版 - 3 3月 2015
活动9th International Conference on Communications and Networking in China, CHINACOM 2014 - Maoming, 中国
期限: 14 8月 201416 8月 2014

出版系列

姓名Proceedings of the 2014 9th International Conference on Communications and Networking in China, CHINACOM 2014

会议

会议9th International Conference on Communications and Networking in China, CHINACOM 2014
国家/地区中国
Maoming
时期14/08/1416/08/14

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