[1]孙飞.胡钧. 基于DS证据理论的双门限协作频谱感知新方法[J].计算机技术与发展,2016,26(04):195-199.
　SUN Fei,HU Jun. mproved Cooperative Spectrum Sensing Scheme of Double Threshold Decision Based on Dempster-Shafer Theory[J].,2016,26(04):195-199.
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 基于DS证据理论的双门限协作频谱感知新方法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
26
期数:
2016年04期
页码:
195-199
栏目:
应用开发研究
出版日期:
2016-04-10

文章信息/Info

Title:
 mproved Cooperative Spectrum Sensing Scheme of Double Threshold Decision Based on Dempster-Shafer Theory
文章编号:
1673-629X（2016)04-0195-05
作者:
 孙飞.胡钧
 南京邮电大学 宽带无线通信与传感网技术教育部重点实验室
Author(s):
 SUN Fei; HU Jun
关键词:
 ; 协作频谱感知; DS证据理论; 双门限判决; 协作带宽开销
Keywords:
 ; cooperative spectrum sensing; Dempster-Shafer evidence theory; double threshold decision; bandwidth cost of cooperation
分类号:
TN925.5
文献标志码:
A
摘要:
 文中提出了一种认知无线电协作频谱感知改进方法。该方法将基于DS证据理论的融合技术与双门限判决方法的优点结合起来。首先，在本地感知时，根据双门限判决去除可靠性不高的感知用户，让可靠性较高的感知用户向融合中心发送信任度函数值，减少了向融合中心发送的数据，从而降低了系统的协作带宽开销。在融合中心，利用DS融合准则，只对接收到的可靠性较高的数据进行融合判决，从而降低融合中心的计算量。仿真结果表明，该改进方法在降低系统的计算量的同时，既可以保持经典DS证据融合方法的高检测性能，也可以有效地降低协作感知的报告信道带宽。
Abstract:
 An improved cooperative spectrum sensing scheme in cognitive radio networks is proposed,which combines the fusion technol-ogy based on Dempster-Shafer evidence theory with the advantage of double threshold decision. In the local sensing period, double threshold decision is introduced to remove the cognitive users with low reliability and let the cognitive users with high reliability send the trusted function value,decreasing the data sending to the fusion center,so as to reduce report channel bandwidth of cooperation. In the fu-sion period,just the highly credible sensing results are fused at the fusion center using the Dempster-Shafer theory,which could reduce the calculation of fusion center. The simulation results show that the novel scheme can keep high detection performance and reduce band-width of cooperation with a low calculation of cooperative system.

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更新日期/Last Update: 2016-06-17