Radar characteristics of pedestrians at 77 GHz

Studying pedestrian radar scattering features will lead to development of more reliable pedestrian collision avoidance radar algorithms. In this paper, the study of backscattering features of 77 GHz radar from a pedestrian in different postures is discussed. Radar scattering patterns were collected from 9 human subjects to investigate possible radar signatures associated with pedestrian at 77 GHz. Measured backscattering changes for the standing and walking postures. Full-wave simulation and measurement are shown to be in agreement. Doppler frequency shift associated with pedestrian motion was also studied at 77 GHz. The time-varying RCS from walking to standing posture is extracted from these measurements.