A Multifrequency Radar System for Detecting Humans and Characterizing Human Activities for Short-Range Through-Wall and Long-Range Foliage Penetration Applications
Figure 22
Time series and time-frequency plots of different unobstructed human activities as measured by the W-Band radar at a range of 30 m (98.4 ft). (a) No activity, (b) breathing, (c) swinging arms, (d) picking up object from ground, and (e) transitioning from crouching to standing.
