Performance Analysis of Full-Duplex Vehicle-to-Vehicle Relay System over Double-Rayleigh Fading Channels

In this paper, we study the performance of a full-duplex (FD) relay system in vehicle-to-vehicle (V2V) communication. In this relay communication system, the communication link from the source node to the relay node can be modeled by Rayleigh fading or double (cascaded) Rayleigh fading distributions while the link from the relay node to the destination node is modeled by double Rayleigh fading distribution. Through the numerical calculation, we obtain the exact analytical expressions for the outage probabilities (OPs) and symbol error rates (SERs) in two cases, i.e. case A (the first hop is the Rayleigh fading channel and the second hop is double Rayleigh fading channel) and case B (two hops are the double Rayleigh fading channels). From these obtained mathematical expressions, the impacts of the distances between the communication nodes and the residual self-interference caused by the imperfect self-interference cancellation at the FD relay are studied. In addition, the effects of path loss exponent and the transmission power at the FD relay are also investigated. Numerical results show that the system performance in terms of OP and SER in the case of double Rayleigh fading channels is significant lower than the case of Rayleigh fading channels. Monte-Carlo simulations are conducted to validate the correctness of these numerical results.