Multiple target detection and localization in UWB multistatic radars

An ultra-wideband (UWB) multistatic radar system, typically composed of one transmitter and several receivers, is a promising solution for tracking an intruder moving within a given surveillance area, because of its extraordinary localization accuracy and very low probability of intercept. In this paper, a new pixel-based localization approach using constant false alarm rate (CFAR) detector is proposed and compared with conventional direct method of localization for UWB multistatic impulse radio radars. Also, a simple processing is proposed to be added after CFAR detector and before either of these localization approaches. This processing which is based on a simplified median filter allows us to reduce the CFAR threshold to a very low value and hence to heavily reduce the number of missed detections. The performance of the proposed approach is evaluated through numerical simulations in multiple target scenarios, accounting for the spatial configuration of the receivers, propagation effects, presence of residual clutter, and noise.