A Two-Stage NLOS Target Positioning Method Based on 0-1 Non-Coherent Binary Accumulation

Target detection in complex non-line-of-sight (NLOS) scenes has been a major concern for scholars. To cope with the problem of false alarm and missed detection in the case of NLOS detection, this paper proposes a two-stage target positioning method based on 0-1 non-coherent binary accumulation. Specifically, a round-trip multipath propagation model is established. Firstly, under the assumption of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$H_{0}$</tex-math></inline-formula>, the 0-1 non-coherent threshold for noise and multipath is calculated based on the constant false alarm rate (CFAR) detection method. Secondly, the signal and noise in the radar's received echo are separated using this 0-1 threshold, leading to the proposal of a 0-1 non-coherent binary accumulation imaging method. Finally, a two-stage NLOS target positioning method is introduced to address issues of false alarms and missed detections, and simulation and experimental results verify the effectiveness of the proposed algorithm.