认知无线电系统的动态双门限协作能量检测算法

A dynamic double-threshold cooperative energy detection algorithm for cognitive radio systems

认知无线电系统中,认知用户间协作检测有利于提高频谱检测的准确性。基于OR(或)协作方式和多门限能量检测算法,提出了一种动态双门限协作能量检测算法,并根据认知用户接收到的主用户信噪比确定检测门限。理论分析和仿真结果表明,该算法可以有效提高频谱检测概率,降低系统漏检概率。

As is well-known, cooperative detection among cognitive users can improve the accuracy of spectrum detection. And then it proposes, a dynamic double-threshold cooperative energy detection algorithm based on the OR rule and the multithreshold energy detection algorithm, and the detection thresholds are determined according to the SNR （Signal-Noise-Ratio）, which is received from the primary user. The theoretical analysis and simulation results indicate that this strategy can improve the probability of spectrum detection, and can simultaneously depress the probability of missing detection.