Outage Performance of Dual-Hop Relay Network with Co-Channel Interference

In this paper, we investigate the outage performance of dual-hop relay networks with co-channel interference which is a major problem in the cellular radio system. A more realistic channel fading model for micro-cellular radio network is adopted as follows, and the desired signal is assumed to have Rician fading due to the presence of line-of-sight (LOS) propagation and the interfering signals from neighboring cells are assumed to experience Rayleigh fading because of the absence of a LOS propagation. An upper bound of outage probability and the asymptotic expression for amplify-and-forward (AF) protocol are derived. Meanwhile, we also propose the optimal power allocation for dual-hop relay networks in high signal-to-interference ratio (SIR) regime. Computer simulations have been performed to verify the validity and the accuracy of theoretical results.