A two-dimensional Doppler and direction-of-arrival (DDOA) radar concept is proposed for the frontal imaging of humans. The system consists of a three-element receiver array configured to provide simultaneous DOA measurements in the azimuth and elevation planes. An experimental system has been built and tested. Two-dimensional frontal images of a human in free space as well as in a through-wall scenario are generated.
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Lin et al. (2006) studied this question.
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