Refocusing Through the Unknown Building Wall with a Filtered Backprojection Algorithm

Conference: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
04/23/2012 - 04/26/2012 at Nuremberg, Germany

Proceedings: EUSAR 2012

Pages: 4Language: englishTyp: PDF

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Li, Fang; Li, Lianlin (Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190, CHINA)

A filtered backprojection (FBP) algorithm incorporating the layered medium Green’s function to take into account the wall effect is proposed for through-the-wall imaging (TWI). A refocusing time factor is introduced to obtain a dynamic image at different focusing time. The image at the time instant when the defined image entropy reaches the minimum is stored as the output of the imaging result. Numerical results show that the proposed method is efficient to provide high quality focused image under unknown wall characteristics. Index Terms - refocusing, TWI, minimum entropy, time reversal, FBP