Through The Wall Respiration Rate Detection Using Hilbert Vibrational Decomposition

In this paper, a simple direct demodulation Doppler radar is proposed to detect the respiration rate through the wall using Hilbert vibration decomposition (HVD) at 2.4 GHz. For through the wall detection of the human subject, the measurements are taken by varying the respiration rate, with different positions of human subject with respect to the radar and different background behind the human subject. This method is suitable for the detection of human subject in natural calamities or disasters. Using this method, through the wall respiration rate of human subject can be detected up to 2–3 meter.