衰落信道下的协作频谱检测及其性能分析  

Cooperative Spectrum Sensing and Performance Analysis under Fading Channel

作　　者：陈永红[1] 郭莉莉[1] 张士兵[2] 

机构地区：[1]南通大学杏林学院,江苏南通226019 [2]南通大学电子信息学院,江苏南通226019

出　　处：《通信技术》2014年第9期1031-1036,共6页Communications Technology

基　　金：国家自然科学基金资助项目(No.61371111;No.61371112);南通大学杏林学院科研基金项目(No.2012K115)~~

摘　　要：在低信噪比和复杂性环境下,协作频谱检测是准确实现频谱感知的有效手段。文中分析了基于能量检测的单用户频谱检测算法以及基于硬判决和等权重的多用户协作频谱检测技术,导出了在高斯信道、Rayleigh衰落信道和Nakagami-m衰落信道情况下协作频谱检测虚警概率和漏检概率的闭合解析式,并对此进行了仿真验证和比较。结果表明,等权重协作频谱检测算法能够有效克服衰落信道对频谱检测的影响。Cooperative spectrum sensing is an effective method for exact spectrum sensing in low signal-noise ratio and complex environment. This paper presents the spectrum sensing algorithm based on energy detection for single user and cooperative spectrum sensing algorithm based on hard decision and equal weight for multiple users. This paper It deduces the closed probability forms of false alarm and missed de-tection under the Gauss, Rayleigh fading and Nakagami-m fading channel. The spectrum sensing perform-ances under different channels are simulated and compared. The results show that the equal-weight coop-erative spectrum sensing algorithm could effectively reduce the effect of fading channel on spectrum sensing.

关 键 词：衰落信道 频谱感知 协作检测 性能分析 

分 类 号：TN925[电子电信—通信与信息系统]