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Inventi Impact - Microwave

Articles

  • Inventi:emw/82/14
    A MULTIFREQUENCY RADAR SYSTEM FOR DETECTING HUMANS AND CHARACTERIZING HUMAN ACTIVITIES FOR SHORT-RANGE THROUGH-WALL AND LONG-RANGE FOLIAGE PENETRATION APPLICATIONS
    Ram M Narayanan, Sonny Smith, Kyle A Gallagher

    Amultifrequency radar system for detecting humans and classifying their activities at short and long ranges is described.The shortrange radar system operates within the S-Band frequency range for through-wall applications at distances of up to 3m. It utilizes two separate waveforms which are selected via switching: a wide-band noise waveform or a continuous single tone. The long-range radar system operating in the W-Band millimeter-wave frequency range performs at distances of up to about 100m in free space and up to about 30m through light foliage. It employs a composite multimodal signal consisting of two waveforms, a wide-band noise waveformand an embedded single tone, which are summed and transmitted simultaneously.Matched filtering of the received and transmitted noise signals is performed to detect targets with high-range resolution, whereas the received single tone signal is used for the Doppler analysis. Doppler measurements are used to distinguish between different human movements and gestures using the characteristic micro-Doppler signals. Our measurements establish the ability of this system to detect and range humans and distinguish between different human movements at different ranges.

    How to Cite this Article
    CC Compliant Citation: Ram M. Narayanan, Sonny Smith, and Kyle A. Gallagher, “A Multifrequency Radar System for Detecting Humans and Characterizing Human Activities for Short-Range Through-Wall and Long-Range Foliage Penetration Applications,” International Journal of Microwave Science and Technology, vol. 2014, Article ID 958905, 21 pages, 2014. doi:10.1155/2014/958905. Copyright © 2014 Ram M. Narayanan et al. This is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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