High-resolution Doppler model of the human gait

Jonathan L. Geisheimer; Eugene F. Greneker III; William S. Marshall

doi:10.1117/12.488286

30 July 2002 High-resolution Doppler model of the human gait

Jonathan L. Geisheimer, Eugene F. Greneker III, William S. Marshall

Proceedings Volume 4744, Radar Sensor Technology and Data Visualization; (2002) https://doi.org/10.1117/12.488286
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

A high resolution Doppler model of the walking human was developed for analyzing the continuous wave (CW) radar gait signature. Data for twenty subjects were collected simultaneously using an infrared motion capture system along with a two channel 10.525 GHz CW radar. The motion capture system recorded three-dimensional coordinates of infrared markers placed on the body. These body marker coordinates were used as inputs to create the theoretical Doppler output using a model constructed in MATLAB. The outputs of the model are the simulated Doppler signals due to each of the major limbs and the thorax. An estimated radar cross section for each part of the body was assigned using the Lund & Browder chart of estimated body surface area. The resultant Doppler model was then compared with the actual recorded Doppler gait signature in the frequency domain using the spectrogram. Comparison of the two sets of data has revealed several identifiable biomechanical features in the radar gait signature due to leg and body motion. The result of the research shows that a wealth of information can be unlocked from the radar gait signature, which may be useful in security and biometric applications.

Citation Download Citation

Jonathan L. Geisheimer, Eugene F. Greneker III, and William S. Marshall "High-resolution Doppler model of the human gait", Proc. SPIE 4744, Radar Sensor Technology and Data Visualization, (30 July 2002); https://doi.org/10.1117/12.488286

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