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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
[ "易本顺(1965-),男,湖北武汉人,博士,武汉大学教授、博士生导师,主要研究方向为多媒体网络通信、信源信道编码、无线通信、光电信息系统等。" ]
[ "姚渭箐(1983-),女,湖北武汉人,博士,国网湖北省电力有限公司信息通信公司工程师,主要研究方向为无线通信与信道编码。" ]
网络出版日期:2018-04,
纸质出版日期:2018-04-25
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易本顺, 姚渭箐. LT码度分布改进及在认知无线电链路保持中的应用[J]. 通信学报, 2018,39(4):76-83.
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.
易本顺, 姚渭箐. LT码度分布改进及在认知无线电链路保持中的应用[J]. 通信学报, 2018,39(4):76-83. DOI: 10.11959/j.issn.1000-436x.2018062.
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.
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。
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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