Outage probability of decode-and-forward relaying system with Weibull distributed multiple co-channel interferences

In this paper, we consider a dual-hop decode-and-forward (DF) relaying system, in which the relay and destination nodes are subject to the arbitrary number of co-channel interferences (CCIs) as well as the additive white Gaussian noise (AWGN) on each node. Assuming that the interference channels are statistically independent and identically distributed (i.i.d) Weibull fading, we derive the outage probability of the DF relaying system by using the moment-based estimators, which allows us to simply yet accurately characterize the sum of Weibull distributions. Furthermore, our asymptotic results reveal that the diversity order of the considered system is solely determined by the fading severity parameters of the desired channels. Monte Carlo simulations have been performed to verify the validity of theoretical results.