Spectrum Sensing Based on EDCAF of Signal in Multipath-Doppler Channel

The communication channel is becoming more and more complicated, which increases difficulty of signal detection of the spectrum band. The performance of signal detection is degraded due to the frequency shift and fading of the doppler multipath channel. In this paper the weak signal detection based on cyclostationary property is considered and energy detection of cyclic-autocorrelation function (EDCAF) is proposed to detect the primary signal in doppler multipath channel. Simulation shows that the proposed method has better performance than that of other detection algorithms. Furthermore, the EDCAF is simple and direct, which is feasible for cognitive radio networks.