Accession Number:

ADA633865

Title:

Through-the-Wall Surveillance

Descriptive Note:

Technical memo

Corporate Author:

DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA

Personal Author(s):

Report Date:

2002-10-01

Pagination or Media Count:

53.0

Abstract:

This report describes the DRDC Ottawa research activities and major findings on through-the-wall surveillance, using ultra-wideband UWB short-pulse SP radars. These activities include both experiments and simulations. Off-the-shelf UWB radio frequency RF equipment was purchased to support experimental investigations. For simulations, a 3D computer model of a single room with a cubic, conducting target was developed. UWB radar located outside the room transmits short UWB pulses while the target is moved around the room in discrete steps. At the beginning of the section, we first show that motion detection is easy, since the radar echoes continuously change in time. However, simple motion detection does not provide enough information for most applications of interest. There is a clear requirement to measure the range and direction of the moving targets. Clutter from fixed objects interferes with the detection of moving targets. One way to suppress these fixed clutter is to use difference waveforms, obtained by subtracting echo waveforms from each other. The results of this report clearly show the detection of a moving target and suppression of fixed clutter. The next step is to determine the direction of the moving target. An antenna array combined with back-projection processing is used for that purpose. The simulated results clearly demonstrate that hidden targets can be tracked in both range and direction. These results have been confirmed experimentally.

Subject Categories:

  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE