EM Modeling of UWB Through-Wall Radar Imaging Using the High-Frequency Geometrical Optics (GO)

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Authors
  1. Foo, S.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
This document reports a computationally efficient, high frequency, EM modeling technique for simulations of ultrawideband (UWB) through-wall radar imaging. This technique uses a deterministic approach to model the UWB radio wave propagations in a complex indoor environment. The algorithm uses a general 3-D shooting-and-bouncing-ray (SBR) geometrical optics technique to model the RF field propagations and multi-reflections in indoor environments. A general multi-layered dielectric flat-plate formulation is used to model the walls. Targets are modelled by using the physical optics. The UWB signal is simulated in frequency domain using a large number of frequency points using the ray tracing method. Inverse discrete-Fourier-transform (DFT) is implemented to convert the frequency-domain results to range profile for each receiver. Radar images are constructed by summing range profiles of the receivers using the back projection technique. By using the newly introduced wave-port ray-tracing concept, the algorithm can handle a general multi-level and multi-room urban operation environment.

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Keywords
UWB (Ultra WideBand);Geometrical optics;Through-Wall radar
Report Number
DRDC-OTTAWA-TM-2002-166 — Technical Memorandum
Date of publication
01 Dec 2002
Number of Pages
59
DSTKIM No
CA021981
CANDIS No
518755
Format(s):
Hardcopy;CD ROM

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