Performance Analysis of IRS-Assisted UAV Relaying System With Imperfect Phase Compensation

Motivated by the potential applications of unmanned aerial vehicle (UAV) and intelligent reflecting surface (IRS) in urban communication networks, this article constructs a two-hop communication system assisted by mobile UAVs and tunable IRS. The system comprises five different topologies spanning from a remote ground robot (RGR) to a ground base station (GBS). Unlike idealized models, this study considers non-perfect phase compensation at the IRS, modeled as a Gaussian-distributed phase error. We derive the closed-form expressions for the outage probability (OP) at the GBS. Simulation results verify the correctness of our theoretical derivations. Based on the derived OP, we employ a joint communication-motion planning (JCMP) method to demonstrate the rationality of considering phase compensation errors through numerical simulation.