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Proceedings Paper

Survey of current technologies for through-the-wall surveillance (TWS)
Author(s): David D. Ferris; Nicholas C. Currie
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Paper Abstract

Recently, a survey was conducted for the Joint Project Steering Group (JPSG) of the National Institute of Justice (NIJ) and Defense Advanced Project Research Agency (DARPA)to determine the state-of-the-art at the present time in through-the-wall surveillance (TWS) technology and the expected advances within the next 10 years. The applicable technologies for TWS include: impulse radar, UHF/microwave radar, millimeter wave radiometry, x-ray transmission and reflectance, and acoustics. Proposed sensors include: monostatic radar, bistatic (or multistatic) radar, radiometers, fixed antenna systems, scanning systems, and focal plane array systems. The ability to penetrate walls leads to a natural conflict between the desire to successfully penetrate walls, which implies lower frequencies and the desire to obtain maximum resolution, which implies higher frequencies. Another conflict involves sophistication of the sensor versus unit cost. These issues and the approaches taken by various developers to find workable solutions are discussed.

Paper Details

Date Published: 7 January 1999
PDF: 11 pages
Proc. SPIE 3577, Sensors, C3I, Information, and Training Technologies for Law Enforcement, (7 January 1999); doi: 10.1117/12.336988
Show Author Affiliations
David D. Ferris, Air Force Research Lab. (United States)
Nicholas C. Currie, Research Associates for Defense Conversion, Inc. (United States)


Published in SPIE Proceedings Vol. 3577:
Sensors, C3I, Information, and Training Technologies for Law Enforcement
Edward M. Carapezza; David B. Law, Editor(s)

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