DF relaying networks in randomly distributed interference environments
Xiazhi Lai, Wanxin Zou, Dongqing Xie, Lisheng Fan · 2017
In this paper, we consider a two-hop cooperative relaying network in a randomly distributed interference environment, where the source communicates with the destination, assisted by N decode-and-forward (DF) relays. We consider the interference-limited environments, where the received signals at the relays and the destination are degraded by random interference nodes distributed according to homogeneous Poisson point processes (PPPs). Based on received signal-to-interference ratio (SIR), relay selection has been deployed to determine one optimal relay out of N ones. To analyze the system performance, we derive both analytical and asymptotic expressions for outage probability under Rayleigh fading channel. From the given results, we see that the system diversity order on SIR varies reversely with the path loss factor α. Additionally, the given results suggest that the system performance is mainly limited by the second hop. Numerical verifications and simulation results are presented to validate our analysis.