基于循环谱的中继合作频谱检测方法

结合循环谱检测和中继合作检测，提出一种衰落信道频谱检测方法。利用不同信道的信道增益和认知用户间的相关性，构建两用户合作信道模型，给出检测统计量的表达式。在此基础上，分析多用户网络的中继合作并进行检测性能仿真，结果表明，当虚警概率较小时，该方法能提高检测概率和检测灵敏度，且灵敏度的增益随认知用户间距离的增大而减小。

Detection Method for Relay Cooperative Spectrum Based on Cyclic Spectrum

Combining advantages of cyclic spectrum sensing with advantages of relay cooperative sensing,this paper proposes cyclic spectrum detection method in fading channels.Considering different channels＇ channel gain and correlation between cognitive users jointly,the two users cooperative channel model is constructed,and test statistic expression is also given.Based on the above results,it discusses relay cooperation of multi-user network,and it makes detection performance simulation.Simulation results show,when the false alarm probability is small,detection probability and detection agility through relay cooperation both improve significantly,and agility gain decreases with the distance between two cognitive user increases.