Life-detection radar signal processing

摘要

As an Non-contact detector, the life detector typically get the human's breathing, heartbeat and other vital signs through the non-metallic medium. Electromagnetic waves of Radar reach all parts of the body through the media, with the human body surface micro-Doppler modulation. Then we can achieve the detection purpose through analyzing the received echo signs of human life. In this paper, the echo signal which carrying the life information is processed. The signal expression is derived, and a simple harmonic vibration model based on the movement characteristics of human body is applied. The expression is extended in Bessel series. The simulation and analysis of the echo signal with the signs of life is finished, whose de-noising is done using wavelet analysis method.