NLOS Target Localization with a UWB Radar

This paper addresses a localization problem for a single non-line-of-sight (NLOS) target shielded by a rectangular building corner in an urban environment exploiting an ultra-wideband (UWB) radar. A novel electromagnetic waves propagation model referring to such building corner is established. Specifically, we firstly analyze the characteristics of the radar echoes propagating along the direct diffraction path and the side wall reflection path. Then, we extract the lengths of these two paths after the target detecting via CFAR technique. Next, based on the priori-known building layout, we obtain the position of the hidden target accurately. Finally, numerical simulations and experimental data validate the proposed approach.