Full-duplex Multi-user Pair Scheduling with Time-selective Fading and Imperfect CSI

Abstract

A multi-user full-duplex (FD) two-way communication system with decode-and-forward (DF) relaying protocol is investigated over time-selective fading channels. The effect of imperfect channel state information (CSI) is considered. The fading channel based approach is used to characterize the residual self-interference (RSI) at FD nodes. The outage performance of the considered system is investigated for different scheduling schemes based on the availability of CSI at the relay node. We derive the closed-form tight approximate expressions for the system outage probability assuming independent and non-identically distributed Rayleigh fading channels. Further, the tightness of the approximation presented is verified through Monte-Carlo simulations. Our analysis reveals the significant insights about the impact of time-selective fading, imperfect CSI, and RSI on the performance of the considered system.