A Multifrequency Radar System for Detecting Humans and Characterizing Human Activities for Short-Range Through-Wall and Long-Range Foliage Penetration Applications
Figure 2
The micro-Doppler signatures of concealed human activities at 9 meters stand-off distance in front of a wooden shed: (a) breathing, (b) lifting a large object from the ground, and (c) moving arms up and down rapidly.
