Through-the-Wall Human Respiration Detection Using Ultra-wideband Impulse Radar Mounted on UAV

摘要

DRONESAR-X is a multisensory drone system developed for supporting the search and rescue mission in the disaster-stricken area. The purpose of this system is to detect and locate the survivor in any possible location and position. An ultra-wideband impulse radar is employed as the main sensor mounted on the drone to detect the buried survivor. However, this task is very challenging since this signal is very weak compared with the background noise and clutter. Also, the drone vibration arm instability because of the wind effect and unbalanced propeller rotation also have to be considered carefully. Thus, this paper proposes a new signal processing method to extract and enhance the obscured human respiration sign working based on analytic signal and singular value segregation. The experimental study on the controlled laboratory environment shows that the proposed method able to suppress the vibration effect simulated by the unbalanced motor motion and also enhance the respiration sign to be detected by the radar system.