A Signal Marker Method Based On Double Threshold Energy Detection

Cognitive radio energy detection algorithm is widely used in practical engineering, but its main shortcoming is that the judgment threshold is difficult, and it is difficult to set the threshold while taking into account both false alarm probability and leakage alarm probability, thus increasing the difficulty of signal marking in the spectrum. Therefore, on the basis of the traditional double-threshold energy detection, a signal marking method is proposed for the characteristic of the fluctuation of the average power of noise. The maximum holding method is used to further process the spectrum and mark the central frequency point. Then, on the basis of the double-threshold energy detection, the frequency points between the double-threshold are sampled and modeled, and the end points of the frequency band are marked, so as to achieve the purpose of signal marking.