Outage Probability of MIMO Relay Systems with Relay Selection under Co-Channel Interferences

In this paper, a decode-and-forward multiple-input multiple-output relay system with relay selection under unequal power co-channel interferences is considered. In the system, transmit beamforming is applied at each transmitter, and maximal ratio combining is applied at each receiver. The closed- form exact outage probability expression of the system over Rayleigh fading channels has been derived. The result is valid for arbitrary antenna number and interferer number. Numerical investigation shows that the theoretical result makes an exact match with the computer simulations.