Energy minimization for UAV communication systems assisted with multiple IRSs

Unmanned aerial vehicles (UAVs) have steadily gained attention to overcome the harsh propagation loss and blockage issue of millimeter-wave communication. However, UAV communication systems suffer from energy consumption, which limits flying time UAVs. In this paper, we propose several consumption minimization techniques through aid multiple intelligent reflecting surfaces (IRSs). specific, introduce a tractable model effectively capture characteristics IRSs user equipments (UEs). Then, derive closed form expression for UE achievable rate, resulting in optimization problems. Accordingly, solve problems by adopting successive convex approximation technique. To compensate high complexity problems, low algorithm that has marginal performance loss. numerical results, show proposed algorithms can save significantly compared benchmark with no IRSs, justifying exploiting is indeed favorable minimization.