Ultra-Wideband (UWB) Remote Sensing and Radar Imaging

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Authors
  1. Foo, S.
  2. Walsh, A.
  3. Kashyap, S.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
The ultra-wideband (UWB) signals have an inherent fine resolution in time and good penetration into many common materials. Used in conjunction with a time-reversal algorithm such as the back projection method, UWB radars are versatile RF imaging tools for remote sensing of objects hidden behind obstacles such as wall, sand and snow. DRDC Ottawa has conducted theoretical and experimental studies of the UWB radar imaging in various areas using the stepped-frequency method. The method has been successfully applied in detecting and imaging targets hidden behind walls of various types, including detection of human subjects buried in the snow. A cross-correlated time-reversal algorithm was developed for the UWB image reconstruction. This algorithm enables UWB imaging radars to locate and resolve objects behind a wall at a standoff position. In comparison to the standard back projection scheme, this algorithm produces images of superior quality with better cross-range resolution. It is also demonstrated that by cross-correlating the array elements with a reference element located further away from the array center, this algorithm is capable of improving the cross-range resolution of the radar images to the pulse-width of the UWB signal.

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Keywords
UWB;Ultra-wideband;Snow penetration;Radar imaging;Through-wall imaging;UWB (Ultra WideBand);Ultra-Wideband radar
Report Number
DRDC-OTTAWA-TR-2004-081 — Technical Report
Date of publication
01 May 2004
Number of Pages
86
DSTKIM No
CA024318
CANDIS No
521851
Format(s):
Hardcopy;CD ROM

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