Abstract
The detection of concealed objects is a concern in multiple domains, especially in areas of defense and security where hidden threats pose an ever-present danger. The measurement and analysis of micro-Doppler signals from concealed targets is a promising approach to this challenge. In this paper, a new detection technique is presented which measures the micro-Doppler signature of object vibrations that are actively induced using acoustic energy. This would permit the detection of stationary threats, such as improvised explosive devices. An exploratory system is set up and measurements are performed and assessed on non-concealed target objects. The results show a clear detection of targets for certain acoustic frequencies, along with favorable noise characteristics. This promising outcome has spurred the continuing development of a next generation system.
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