Physical-Layer Security for DF Two-Way Full-Duplex Cooperative Wireless Networks over Rayleigh Fading Channels

摘要

Cooperative communication is a new method that uses multi-hop communication to send the information from source to sink. The broadcast nature of wireless signals causes the communication process to be vulnerable to wireless attacks such as eavesdropping attacks, in which a non-legitimate user tries to overhear the exchanged data between legitimate users. Physical layer security can be achieved by using jamming signals. This paper discusses and analyzes the proposed system model for a decode-and-forward two-way scheme under physical layer security where full-duplex mode and Rayleigh fading channels are employed. The secrecy outage probability in case of single relay is derived in order to evaluate the secrecy performance of the proposed system in which the transmission process takes two time slots. Theoretical results are given for the derived expression and a simple comparison with half-duplex system model is made.