Outage probability of dual-hop decode and forward MIMO relay with co-channel interference

In this paper, the mutual information outage probability (P) for dual-hop decode-and-forward multiple-input multiple-output (MIMO) relay channel is obtained. Rayleigh distribution is used to model MIMO channels, and both full-duplex and half-duplex modes are investigated. Co-channel interference at relay and destination nodes has been considered. Our assumption is based on the result of [1], which establishes that MIMO channel mutual information can be well approximated by a Gaussian distribution. We have found a closed form expression for P given as a function of bivariate Gaussian cumulative density function. The results show for low-medium interference regime that full-duplex performs better than half-duplex mode. On the other hand, when relay self-interference increases, half-duplex outperforms full-duplex mode. Regarding the number of antennas, full-duplex mode performs better than half-duplex mode when number of antennas increases, even in high interference scenario. All the results are validated by numerical Monte Carlo simulations.