Basic gait analysis based on continuous wave radar

A gait analysis method based on continuous wave (CW) radar is proposed in this paper. Time–frequency analysis is used to analyze the radar micro-Doppler echo from walking humans, and the relationships between the time–frequency spectrogram and human biological gait are discussed. The methods for extracting the gait parameters from the spectrogram are studied in depth and experiments on more than twenty subjects have been performed to acquire the radar gait data. The gait parameters are calculated and compared. The gait difference between men and women are presented based on the experimental data and extracted features. Gait analysis based on CW radar will provide a new method for clinical diagnosis and therapy.

► The medical application of gait analysis based on CW radar system is proposed.
► Human gait radar signals are spectrum-analyzed through the Short-time Fourier transform.
► More than ten typical gait parameters are extracted from the human echo signal.
► We examine the gait difference between of men and women through CW radar.
► The extracted gait features of disabled individuals reveal the health condition of patient.