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International Journal of Antennas and Propagation
Volume 2015, Article ID 539510, 8 pages
http://dx.doi.org/10.1155/2015/539510
Research Article

A Through-the-Wall Radar Imaging Method Based on a Realistic Model

1College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
2Microwave Sensing, Signals and Systems (M3S), TU Delft, 2628 CD Delft, Netherlands
3Collaborative Innovation Center of Information Sensing and Understanding, Xi’an, Shaanxi 710071, China

Received 19 January 2015; Revised 3 June 2015; Accepted 23 June 2015

Academic Editor: Amelie Litman

Copyright © 2015 Tian Jin and Alexander Yarovoy. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An image focusing method based on a realistic model for a wall is proposed for through-the-wall radar imaging using a multiple-input multiple-output array. A technique to estimate the wall parameters (i.e., position, thickness, and permittivity) from the radar returns is developed and tested. The estimated wall properties are used in the developed penetrating image formation to form images. The penetrating image formation developed is computationally efficient to realize real-time imaging, which does not depend on refraction points. The through-the-wall imaging method is validated on simulated and real data. It is shown that the proposed method provides high localization accuracy of targets concealed behind walls.