Optimal Positioning of Hovering UAV Relays for Mitigation of Pointing Error in Free-Space Optical Communications

The relay positions or hop distances in a multi-hop relaying scheme is an important parameter that can be optimized order to mitigate the angle-of-arrival variance pointing error free-space optical (FSO) backhaul link. In this study, we have for amplify-and-forward and decode-and-forward relays unmanned aerial vehicle-based FSO. Particularly, shown significant performance improvement may achieved by optimizing outage probability as function of distance when are constrained finite power gain. Additionally, discovered low signal-to-noise ratio channel, optimal particular inversely proportional hop.