Enhanced Channel-Phase Based Physical-Layer Authentication for Multi-Carriers Transmission

This paper focuses on the threat that the eavesdropper uses an extremely high transmit power to send the authentication response, which aims to pass the Physical-Layer Authentication (PLA) illegally. To prevent eavesdropper from decreasing the authentication performance, we propose an enhanced channel-phase based PLA for multi-carriers transmission, where a novel two-level decision is used in the channel-phase based PLA scheme. We further derive the optimal threshold for accurately detecting the response signal with high transmit power. Moreover, the theoretical performance analysis is provided for the proposed scheme. Simulation results show that the proposed scheme significantly enhances the authentication performance, and indicates the effectiveness of the theoretical analysis.