联合信任度与信噪比的自适应协作频谱感知算法  

Adaptive cooperative spectrum sensing algorithm based on credibility and SNR

作　　者：周瑞[1] 文鸿[1] 周恒[1] 

机构地区：[1]湖南工业大学计算机与通信学院,湖南株洲412007

出　　处：《电子技术应用》2015年第5期105-108,共4页Application of Electronic Technique

基　　金：湖南省自然科学基金(14JJ3123);湖南工业大学自然科学基金(2012HZX23);湖南工业大学研究生创新基金(CX1405)

摘　　要：为提高认知无线电的频谱感知性能,提出一种联合信任度与信噪比的自适应协作频谱感知算法。该算法通过信噪比估计和信噪比比较获取各认知用户的初始信任度值,自适应地调整信任度、参与度、判决门限等参数以实现算法最优,并采用周期性初始化策略以满足时变信道的要求。仿真结果表明,与传统K秩协作频谱感知算法和自适应合作频谱检测算法相比,该算法不仅提高了协作检测性能和稳定性,而且具有更好的实时性和抗恶意用户性能。To improve cognitive radio spectrum sensing performance, this paper proposes an adaptive cooperative spectrum sens- ing algorithm based on credibility and SNR. This scheme uses the estimative value of SNR to obtain CR users＇ initial credibility, and then uses the adaptive parameter adjustment strategy to achieve the optimal state. In addition, the algorithm can meet the re- quirements of the time-varying channel by using the periodic initialization strategy. Simulation results indicate that the algorithm can improve the detection performance and stability. The Real-time performance and malicious user resistance ability are also better than that of the adaptive cooperative spectrum sensing method and traditional K rank cooperation spectrum sensing algorithm.

关 键 词：信任度 信噪比 自适应 协作频谱感知 认知无线电 

分 类 号：TN925[电子电信—通信与信息系统]