Distributed Spectrum Sensing in Cognitive Radio Networks

In cognitive radio networks, secondary users can cooperatively sense the spectrum to detect the presence of primary users. In this paper, we propose a fully distributed and scalable cooperative spectrum sensing scheme based on recent advances in consensus algorithms. In the proposed scheme, the secondary users can maintain coordination based on only local information exchange without a centralized common receiver. Simulation results show that the proposed consensus scheme can have significant lower missing detection probabilities and false alarm probabilities in cognitive radio networks. It is also demonstrated that the proposed scheme has proven sensitivity in detecting the primary user´s presence.