An Optimized Scheme to Resist Primary User Emulation Attacks

The problem of cognitive radio (CR) network security has become an important problem in cognitive radio technology. One of the most common attacks is primary user emulation attacks (PUEA), where some malicious users simulate CR users to prevent them from accessing the vacant frequency. Here, a cooperative spectrum sensing (CSS) method with optimal weight coefficient based on improved energy detection is proposed. In the proposed scheme, we combine sensing information using the optimal weight coefficient at a fusion center and apply the improved energy detection, which effectively prevent the PUEA. Simulation results show that the method outperforms the traditional energy detection with optimal weight coefficient in detection performance.