Conference Paper

# Comparison of basic inversion techniques for through-wall imaging using UWB radar

Dept. of Electron.&Inf., Vrije Univ. Brussel, Brussels

Conference: Radar Conference, 2008. EuRAD 2008. European Source: IEEE Xplore

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**ABSTRACT:**In this paper, we consider a problem for finding the locations of electromagnetic inhomogeneities completely embedded in homogeneous two layered medium. For this purpose, we present a filter function operated at several frequencies and design an algorithm for finding the locations of such inhomogeneities. It is based on the fact that the collected Multi-Static Response (MSR) matrix can be modeled via a rigorous asymptotic expansion formula of the scattering amplitude due to the presence of such inhomogeneities. In order to show the effectiveness, we compare the proposed algorithm with traditional MUltiple SIgnal Classification (MUSIC) algorithm and Kirchhoff migration. Various numerical results demonstrate that the proposed algorithm is robust with respect to random noise and yields more accurate location than the MUSIC algorithm and Kirchhoff migration.Computer Physics Communications 08/2012; · 2.41 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**Ultra Wideband (UWB) technology shows a new way for Through-the-wall radar imaging which is of very high importance in urban warfare. Three dimensional imaging gives more information of the scene compared to the conventional two dimensional. This paper makes use of impulse like signals which suites as best waveform for UWB transmission, and discusses the need for raw radar processing. It extends the back projection approach for three dimensional target imaging. Major part of the clutter is removed by selecting the voxels that were of targets. The selection is done by the received signal strength at that voxel. The threshold limit after normalizing the signal intensity is taken as 0.75. The simulation results show the close resemblance of the three dimensional image to its original shape and this closeness is observed to be as 53 %.01/2011; -
##### Conference Paper: Time reversal-based processing for human targets detection in realistic through-the-wall scenarios

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**ABSTRACT:**In this paper we present the final results of a project devoted to show the abilities of Time Reversal processing for Through-The-Wall (TTW) detection of human targets. From a multistatic-multiview UWB radar system, experimental data from realistic TTW scenarios are collected and rearranged to form the multistatic data matrix K. The results of the singular value decomposition of the K matrix are used to build an efficient detector combining directions and arrival times. Images from different radar scenes (with canonic or human targets) are presented and discussed.2011 European Microwave Week (EuMW-EuRAD), Manchester; 01/2011

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