Remotely detectable signs of life based on impulse UWB radar.

It is challenging to extract signs of life under low signal to noise ratio (SNR) using a contactless radar in complex environments. Via analyzing the characteristics of signs of life, a feasible localization and detection technique is investigated by employing the through-wall ultra-wide band (UWB) radar. Based on the time-frequency matrix from the wavelet transform (WT) technique performed on the skewness and kurtosis of the received pulses, the distance from the radar to human beings is acquired. Human breathing rate (BR) is measured only using the pulses in the effective area. Different experiments are conducted to test the presented detection technique compared with several traditional methods. [ABSTRACT FROM AUTHOR]