Degree distribution optimization for LT codes and its application in link maintenance of cognitive radio

Benshun YI; Weiqing YAO

doi:10.11959/j.issn.1000-436x.2018062

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Degree distribution optimization for LT codes and its application in link maintenance of cognitive radio

Papers | 更新时间：2024-06-05

- Degree distribution optimization for LT codes and its application in link maintenance of cognitive radio
- Journal on Communications Vol. 39, Issue 4, Pages: 76-83(2018)
- 作者机构：
  
  1. 武汉大学电子信息学院，湖北武汉 430072
  2. 武汉大学深圳研究院，广东深圳 518057
  3. 国网湖北省电力有限公司信息通信公司，湖北武汉 430077
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61371125);Basic Research Project of Shenzhen(JCYJ20150630153917254)
- DOI：10.11959/j.issn.1000-436x.2018062
  CLC： TN911.22
- Online First：2018-04，
  
  Published：25 April 2018
- 稿件说明：
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Benshun YI, Weiqing YAO. Degree distribution optimization for LT codes and its application in link maintenance of cognitive radio[J]. Journal on Communications, 2018, 39(4): 76-83.
DOI：

Benshun YI, Weiqing YAO. Degree distribution optimization for LT codes and its application in link maintenance of cognitive radio[J]. Journal on Communications, 2018, 39(4): 76-83. DOI： 10.11959/j.issn.1000-436x.2018062.

摘要

度分布是影响Luby transform（LT）码性能的关键因素。基于认知无线电链路保持模型，采用双层寻优算法（THOA

two-layer hierarchical optimization algorithm），将译码开销较小时具有高译码成功率的改进的泊松分布（IPD

improved Poisson distribution）与译码开销较大时具有高译码成功率的顽健孤子分布（RSD

robust soliton distribution）的优点进行有机结合，构建新型LT码度分布。仿真结果表明，该新型度分布应用于基于LT码的认知无线电链路保持中，能有效提高次用户通信可靠性和有效性。

Abstract

The degree distribution has a great influence on the performance of Luby transform (LT) codes.Based on the link maintain model of cognitive radio system，the novel degree distribution of LT codes was obtained by using the THOA (two-layer hierarchical optimization algorithm) to combine the IPD (improved poisson distribution) which achieved high decoding success rate with low overhead and the robust soliton distribution (RSD) which achieved high decoding success rate with high overhead.Simulation results show that the proposed method with application to link maintenance in cognitive radio system can improve the reliability and efficiency of secondary communication.

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references

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