Evaluation of ray-tracing software in through-wall sensing (TWS) applications – TWS propagation modelling

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Authors
  1. Barrie, G.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
DRDC Ottawa is investigating high resolution synthetic aperture radar (SAR) techniques to perform 3-D imaging through walls. This is a relatively new application for radar, presenting many technical challenges. First and foremost among these is the presence of an opaque material in the propagation path. In contrast with traditional radar systems limited by range, power or clutter, through-wall radar must contend with signal transmission and reception through inhomogeneous media, and the requirement of large dynamic signal range. This work evaluates the suitability of commercially-available propagation software to model large scale through-wall SAR scenarios via ray-tracing. Performance criteria were established and compared with results from finite-difference time-domain (FDTD) algorithms. While there are physical restrictions to the range of applicability, algorithms based on ray-tracing are sufficiently accurate and readily adaptable for use in a simulation environment, and can do so much more efficiently than standard FDTD methods.

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Keywords
Through-Wall Sensing;Ray-Tracing;Geometric Optics;RF Propagation;Synthetic Aperture Radar
Report Number
DRDC-OTTAWA-TM-2008-320 — Technical Memorandum
Date of publication
01 Jun 2009
Number of Pages
86
DSTKIM No
CA032517
CANDIS No
531682
Format(s):
Electronic Document(PDF)

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