Cooperation spectrum sensing method based on adaptive threshold

Considering every secondary user(SU) has its own credibility of sensed results since its different sensed environment in actual environment, this paper proposes an adaptive threshold-based cooperative spectrum sensing scheme, which adjusts the local false-alarm probability of SUs based on the credibility of each SU, and adjusts the threshold of each SU adaptively. The simulation results show that, the proposed method has improved system detection probability obviously, comparing with traditional cooperation spectrum sensing methods.