摘要
频谱资源是限制变电站内的传感终端发展的重要因素,嵌入认知无线电的无线终端可动态检测空闲频谱并进行数据传输。变电站内复杂的无线环境给频谱感知带来麻烦,快速准确的频谱感知意义重大。本文研究恶意节点对协作频谱感知性能的影响,给出一种基于声望值的双门限加权的序贯检测方法,该方法通过对融合数据进行加权来提高感知性能,缩短感知时间,减少判决样本,能够进行恶意节点的判断。仿真结果验证了本方法具有很好的性能。
Spectrum resource becomes the important factor that limit the development of sensing terminal in the substation, wire- less terminal based on cognitive radio can dynamic detect the idle spectrum resource for data transmission. Complex wireless envi- ronment make trouble to spectrum sensing, fast and accurate spectrum sensing is important. This paper studies the malicious nodes influence on the performance of cooperative spectrum sensing, gives a method based on double threshold value of the popu- larity of the weighted sequential probability ratio test. This method can improve sensing performance by weighting to the data of fusion, shorten sensing time, reduce the number of sample for decision and judge whether there are malicious nodes. Simulation results show that the proposed method has better performance.
出处
《计算机与现代化》
2012年第3期34-39,共6页
Computer and Modernization
