相关阴影衰落信道下合作感知节点选择算法  

Sensor Selection for Collaborative Spectrum Sensing under Correlated Log-normal Shadowing

作　　者：申新望 曾凡仔[1] 周敏 

机构地区：[1]湖南大学嵌入式系统与网络实验室,长沙410082 [2]国家安全生产监督总局,北京100713

出　　处：《系统仿真学报》2013年第12期2823-2827,共5页Journal of System Simulation

基　　金：国家自然科学基金(61173012);湖南省自然科学基金重点项目(12JJA005);湖南省高校创新平台开放基金项目(10K015)

摘　　要：在相关阴影衰落信道条件下,感知节点之间的相关性严重影响合作感知的性能。虽然合作感知节点数目的增加可以提高系统检测性能,但不断增加的节点所带来的性能增益逐渐减小,同时系统资源使用效率也会降低。因此,为了合理的折中资源使用效率与感知性能,提出了一种新的合作感知节点选择算法,选出相关阴影信道下最优感知节点集合。实验结果表明所提方案的有效性和可靠性。Under correlated log-normal shadow fading channel, the correlation between sensors affect the performance of the cooperative spectrum sensing. Although collaborative spectrum sensing could improve the detection performance as the number of collaborative sensors increased, but the gain of newly added collaborative sensor decreased and the system resources usage efficiency decreased. Therefore, in order to get a good trade-off between sensing reliability and system resources usage efficiency, a new algorithm was proposed to select the effective sensors for collaborative spectrum sensing under correlated log-normal shadowing. The simulation results show validity and reliability of the algorithm.

关 键 词：认知无线电 频谱感知 节点选择 衰落信道 

分 类 号：TN911[电子电信—通信与信息系统]