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认知无线电网络中安全的合作频谱感知

DOI: 10.13190/jbupt.201102.71.yanq, PP. 71-75

Keywords: 认知无线电,频谱感知,威胁模型,加权融合

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Abstract:

在建立认知无线电网络威胁模型的基础上,分析了恶意攻击下传统合作频谱感知算法性能的下降程度.为了对抗恶意用户对频谱感知协议的攻击,提出了一种基于信誉的加权合作频谱感知算法.该算法根据每个认知用户的历史行为更新其信誉值,再利用信誉值为每个认知用户分配加权因子,最后进行加权融合及判决.仿真结果表明,在威胁环境下新算法优于传统合作频谱感知算法.

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