基于递归算法的频谱感知方法

Recursive algorithm based spectrum sensing

针对传统的宽带频谱感知方法需要在各个频率信道平均分配计算量或硬件资源,频谱感知效率不高问题,给出利用递归算法代替快速傅立叶变换算法进行频谱感知的方法。根据信道占用率统计规律,调整频谱感知控制单元的本振频率,自适应选择递归算法滤波器,实现对多个感兴趣频率信道检测。仿真实验及分析表明,利用递归算法进行频谱感知时,只需要计算那些感兴趣的频率信道的功率谱,提高了频谱感知效率。

Conventional wide band spectrum sensing approach need equally distribute the amount of calculation or hardware resources among each frequency channel,and therefore the efficiency of spectrum sensing is low.This paper presents a spectrum sensing method based on recursive algorithm rather than Fast Fourier Transform（FFT） algorithm.Combining channel occupancy ratio and adjusting local oscillation frequency of spectrum sensing control unit,recursive algorithm can adaptively achieve spectrum sensing.Recursive algorithm has simple configuration,low computational amount and easy realization.Experiment result and analysis shows that the recursive method can selectively sense interested frequency of the whole band and therefore improve its efficiency effectively.