一种分布式协作频谱感知技术  

A distributed cooperative spectrum sensing technology

作　　者：范祥[1] 史治平[1] 

机构地区：[1]电子科技大学通信抗干扰国家级重点实验室,四川成都610054

出　　处：《电子技术应用》2011年第6期103-105,109,共4页Application of Electronic Technique

基　　金：国家科技重大专项(2009ZX03003-002-01)

摘　　要：构造认知用户的网络模型为马尔科夫随机场,应用BP算法和加权BP算法来协助分布式网络中的决策融合,利用加权的BP算法更有效地解决阴影衰落和恶意节点所导致的问题。这种方法的性能优于现有的分布式网络中的大数判决等其他多数算法的性能。采用MATLAB进行仿真,验证了分析结果。Model the network of secondary users as Markov random fields and to apply the belief propagation algorithm and the weighted belief propagation algorithm to facilitate decision fusion in a distributed manner, and use weighted BP to solve the shadow fading and malicious nodes more effectively. The performance of this method is superior to the existing major voting algorithm and the most of the others algorithms in distributed cognitive radio networks. Finally, a simulation with MATLAB has been done and verifies the results.

关 键 词：分布式协作频谱感知 置信传播算法 加权置信传播算法 马尔科夫随机场 

分 类 号：TN929.5[电子电信—通信与信息系统]