Analysis of Sensing Efficiency for Cooperative Spectrum Sensing With Malicious Users in Cognitive Radio Networks

In this letter, we consider cooperative spectrum sensing with the presence of malicious users. The detailed detection performance and sensing efficiency are formulated to analyze the impact of the incorrect information on the sensing system. To cope with the misleading effect of the malicious users, we further propose to implement the authentication mechanism to filter out the incorrect information. We also optimize the authentication code length to reduce the system overhead. Simulation results demonstrate that we can reap comparable performance with the authentication mechanism and achieve a good tradeoff between sensing efficiency and communication overhead.