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Proceedings Paper

Ultrawideband through-wall radar for detecting the motion of people in real time
Author(s): Soumya Nag; Mark A. Barnes; Tim Payment; Gary Holladay
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Paper Abstract

Law enforcement officers and search-and-rescue workers often face the difficult task of determining the locations of people inside a building or obscured by smoke and debris. To address this problem, Time Domain Corporation (TDC) has developed a real-time, hand-held radar to detect the motion of persons in range and azimuth through non-metallic walls. This radar is a time modulated ultra-wide band (TM-UWB) impulse radar that generates a two-dimensional (2D) representation of moving targets in real time. The intentional transmit power emitted from the radar is comparable to the FCC Part 15, Class B limits. It has the following benefits: (1) covertness because of its ultra-low power noise-like signal, (2) high resolution at low radio frequencies for penetrating building materials, (3) reduced range ambiguities and clutter fold-over because of pseudo-random time modulation, and (4) clutter rejection because of the ultra-wide bandwidth of the signal. In this paper, an outline of the key parameters of the TDC prototype radar RadarVision2000 (RV2000) and a brief description of the algorithm that generates a motion map showing the range and direction of the moving people are presented. Some typical radar images of multiple targets for a variety of building materials and cluttered environment obtained using the prototype are shown. Finally, the paper presents some preliminary results for resolving the targets in the elevation plane along with a processing technique for reducing the intensity of multi-path responses in the images.

Paper Details

Date Published: 30 July 2002
PDF: 10 pages
Proc. SPIE 4744, Radar Sensor Technology and Data Visualization, (30 July 2002);
Show Author Affiliations
Soumya Nag, Time Domain Corp. (United States)
Mark A. Barnes, XonTech, Inc. (United States)
Tim Payment, Time Domain Corp. (United States)
Gary Holladay, Time Domain Corp. (United States)

Published in SPIE Proceedings Vol. 4744:
Radar Sensor Technology and Data Visualization
Nickolas L. Faust; Nickolas L. Faust; James L. Kurtz; Robert Trebits, Editor(s)

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