End-to-End Performance Analysis of Full-Duplex AF-UAV Relay Networks: Tight-Lower Bound ASER

The unmanned aerial vehicles (UAVs) have attracted much attention in modern wireless communication as an effective solution to improve the coverage in the wireless communication networks. In particular, UAVs have been employed as relay nodes to provide low latency and high data rate connection, especially during disasters, where the existing communication networks are damaged. This paper investigates the end-to-end (E2E) performance of a UAV-aided full-duplex (FD) bi-directional relay network in the presence of the residual loop-interference (LI). First, A closed-form expression for the cumulative distribution function (CDF) of the E2E signal-to- interference-and-noise ratio (SINR) is derived and presented in this work. Next, we introduce a closed-form expression for the E2E average symbol error rate (ASER), which is validated using Monte Carlo simulations. Then, this ASER expression is utilized to evaluate the E2E performance of the FD-UAV- assisted bi-directional network in the presence of the residual LI. The evaluated performance gives the network designers a clear comprehension of the impact of the residual LI on the E2E performance of the investigated network.