An asynchronous cooperative spectrum sensing scheme for cognitive radio

This paper proposes an asynchronous cooperative spectrum sensing algorithm of two cognitive radio (CR) users with different sensing periods. By keeping the joint false alarm probability unchanged, the decision threshold is adaptive adjust through the sensing interval between the two users. We reduce the weight of sensing information with low credibility on the results of cooperation and increase the weight of sensing information with high credibility. The results show that the detection performance of the proposed algorithm is better than the traditional method.