Performance analysis of fixed gain MIMO AF relaying with co-channel interferences

In this paper, we present an analytical study on the outage performance of a two-hop multiple-input and multiple-output (MIMO) amplify-and-forward (AF) relay network, where the source, relay and destination are all equipped with multi-antenna. Specifically, by applying the maximal-ratio-transmission (MRT) and maximal-ratio combining (MRC) for the transmitter and receiver of each hop, respectively, we first obtain the output signal-to-interference-plus-noise ratio (SINR) of the two-hop fixed gain MIMO AF relaying with multiple co-channel interferences (CCIs) and noise at the relay. Then, based on the specific functions, we present the closed-form outage probability (OP) expression of the consider AF relay network. Finally, computer simulations are provided to demonstrate the validity of the derived theoretical formulas, and indicate the effects of antenna combinations, CCI and power allocation on the outage performance of the consider two-hop AF relaying.