Joint relay transmit-receive antenna selection and opportunistic source selection strategy for full-duplex relaying

In this paper, we investigate a cooperative relay network where two users exchange messages through a full-duplex relay. A joint relay transmit-receive antenna selection and opportunistic source selection (RAS-OSS) strategy is proposed to improve the performance of the full-duplex relay network, when the roles of the antennas at the full-duplex relay are not predefined. Both of the amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered at the relay. Asymptotic approximations of average transmission rate and outage probability are derived to evaluate the performance of the network when the RAS-OSS strategy is adopted. Both analytical and numerical results reveal that the asymptotic approximations are tight in high signal-to-noise ratio regime and the RAS-OSS strategy improves the performance of the network under both AF and DF protocols.