基于FFT谱能量检测和互相关检测的快速频谱感知方法及其性能分析

为了解决无人机通信中频谱资源紧张的问题，利用认知无线电技术实现无人机动态共享地面通信的频谱资源。针对单用户频谱感知的遮挡效应问题, 利用单用户移动检测, 提出基于主用户空间范围内的频谱能量检测和互相关检测结合的二次检测方法, 分析并给出所提算法在主用户随机出现情况下的虚警概率和检测概率的解析表示。仿真结果表明, 所提算法在运算量较低情况下获得比已有单用户检测算法更好的检测性能。

Joint FFT spectrum energy and correlation detection based fast spectrum sensing method and performance analysis

In order to solve the problem of spectrum resource shortage in UAV Communication,cognitive radio technology is used to realize UAV dynamic sharing of spectrum resources in ground communication.Aiming at the problem of sheltering for the single user spectrum sensing,a double detection method based on single user mobile detection was proposed,which is composed of joint spectrum energy detection and cooperative detection in the scope of primary user space.The analytic representation of the detection probability and false probability is analyzed with random arrival and department of primary user.Simulation results show that the proposed algorithm has better dection performance than other single user detection algorithm in the case of low computation.