Secure UAV-to-UAV Systems With Spatially Random UAVs

In this letter, we investigate the secrecy performance of an unmanned aerial vehicle (UAV)-to-UAV system, where a UAV acts as the source ( <tex-math notation="LaTeX">S </tex-math> ) transmitting information to a legitimate UAV receiver while a group of UAVs trying to eavesdrop the information delivery between <tex-math notation="LaTeX">S </tex-math> and legitimate UAV receiver. The locations of the legitimate UAV receiver and the eavesdropping UAVs are randomly distributed in the coverage space of <tex-math notation="LaTeX">S </tex-math> . We first characterize the statistical characteristics of the signal-to-noise ratio over <tex-math notation="LaTeX">S </tex-math> to the legitimate UAV receiver links; and then the closed-form analytical expressions for secrecy outage probability and the average secrecy capacity have also been derived accordingly. Finally, Monte-Carlo simulations are carried out to verify our proposed analytical models.