Geometric Distribution of UAV Detection Performance by Bistatic Radar

In recent years, bistatic radar has been considered for unmanned aerial vehicle (UAV) detection. In radar systems, it is often assumed that UAVs have constant acceleration or even constant velocity. However, due to the continuous variation of distance and angles between moving UAVs and bistatic radar transceivers, geometry-induced acceleration, which will change the Doppler frequency shift, will be introduced even for a target moving uniformly in a straight line. In this article, the impact of geometry-induced acceleration and path loss on detection performance is specifically analyzed. The monotonicity and extremum of detection performance with respect to the geometric parameters of the target are obtained. Finally, theoretical results are verified with the geometric distribution of detection performance given by simulations. The results show that better detection performance is obtained in the vicinity of the extension line of the baseline in bistatic radars, which can provide some guidance for bistatic radar deployment.