Research on Human Micro-motion Feature Extraction Technology

Micro-Doppler features are unique features of moving targets and can provide a basis for target recognition. Human micro-motion research is a new technology developed in recent years. The signal processing means can extract the Doppler shift of the swing excitation of various parts of the body while the human body is walking. Based on the human motion model proposed by Thalmann, this paper models the human body as a regular sphere and ellipsoid, and gives the velocity, phase, displacement and RCS calculation expressions of each limb. Based on this calculation, The radar echo of the model is extracted and Micro-Doppler features of various parts of the human body were extracted by time-frequency analysis of pseudo-smooth Wigner-ville distribution (SPWVD). The simulation results verify the feasibility of the model and method.