Relaying in Access Network with Correlated and Non-Identical Fading

In this paper, we investigate the performance of a three-link relay system in the scope of radio access networks. The diversity decode-and-forward (DDF) mode and repetition coding are adopted due to the robustness and low complexity for small devices. On the other hand, signal transmissions are subject to mixed fading. The backhaul link is under the Rician fading, while the access link and direct link are under the correlated and nonidentical Rayleigh fading. Several exact and closed-form formulas are derived. The impact of correlation on QoS can be clearly observed from the numerical experiments.