Performance Research on Full-Duplex Relay Selection Scheme

To improve spectral efficiency of the cooperative communication system, the communication system with full-duplex relay was investigated. First, the conventional proactive opportunistic relaying and the optimal full-duplex relay selection were introduced. Then, an incremental full-duplex relay scheme was proposed based on the optimal full-duplex relay selection. Next, the outage performance of the proactive opportunistic relaying used in the full-duplex relay network was analyzed, and the accurate closed form expressions of the outage probabilities of these three schemes were derived. Furthermore, the approximations of the outage probabilities in the high signal-to-noise ratio (SNR) regime were obtained. At last, the theoretical results of the proposed scheme were verified by numerical simulations. The simulation results show that the outage performance of the proactive opportunistic relaying and the optimal full-duplex relay selection tends to platform effect in high SNR, and the outage performance of incremental full-duplex relay scheme is improved with the increasing SNR. Meanwhile, the outage performance of incremental full-duplex relay scheme is the best, the outage performance of the proactive opportunistic relaying is the worst.