Abstract
For the reason of target multipaths ambiguities, localization for hidden moving target due to lack of line of sight (LOS) path in urban environments is a hard task. To handle this problem we propose a localization algorithm based on the internal connection of these multipaths in this paper. First, we establish an electromagnetic (EM) propagation model based on the characters of the measured signal received by an L-band single-input single-output (SISO) ultra-wideband (UWB) radar. After that, the model-based target localization algorithm is proposed based on a times-of-arrival (TOAs) association method, which is able to match the measured TOAs with the corresponding EM propagation paths correctly. The proposed method can cope with the case while some missing detections of TOAs happen. Simulation and experimental results ultimately validate the robustness and the state-of-the-art performance of the proposed algorithm.
Highlights
Urban sensing has wide applications in many fields, such as urban battles, rescues and anti-terrorism [1]–[3]
MODEL-BASED TARGET LOCALIZATION we introduce the target localization algorithm
The relative positions and the amplitudes of these range tracks varying with the target locations
Summary
Urban sensing has wide applications in many fields, such as urban battles, rescues and anti-terrorism [1]–[3]. The penetrating signals are very weak while the target is hidden behind the whole room or at the building corner due to the serious attenuation while passing multiple walls Under this situation, the NLOS multipath detection is more qualified for NLOS detection by exploiting the multipaths derived from diffraction and specular reflections on building surfaces. Mir. There have been many works done in exploiting NLOS multipaths to detect hidden targets [10]–[24]. In our previous work [25], we have obtained the wall’s positions in corner environment using an L-band imaging radar, while in [26], a positioning algorithm which utilize multipath components produced by diffraction and specular reflections on surrounding surfaces is proposed.
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