Cooperative Spectrum Sensing for Multiband under Noise Uncertainty in Cognitive Radio Networks

Abstract

In cognitive radio networks, various cooperative spectrum sensing schemes are proposed to enhance the detection performance under noise uncertainty. The limit of control channel bandwidth will impact the sensing performance when the number of secondary users becomes very large. In this paper, a multiband cooperative spectrum sensing scheme is presented, which transfers sensing information utilizing the idle frequency bands rather than only depending on common control channel. According to the analysis and simulation results, the scheme of this paper can improve the system sensitivity and decrease sensing communication overhead of common control channel compared to traditional cooperative sensing scheme.