Time Reversal Technique based on Spatio-Temporal Windows for Through the Wall Imaging

Victor Odedo, Mehmet E. Yavuz, Fumie Costen, Ryutaro Himeno, Hideo Yokota

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    Abstract

    Time Reversal (TR) imaging methods have recently generated considerable interest due to their robustness and ability to locate multiple targets. However, problems arise when the targets are behind an obstructing material. We develop a preprocessing algorithm for TR imaging methods to obtain images of targets hidden behind a wall, applying temporal and spatial windows on the full-Multistatic Data Matrix (MDM). By using temporal-windows, we divide the full-MDM into sub-MDMs. We further segment the sub-MDMs spatially by selecting its elements corresponding to a predetermined number of antennas in space.
    We take the singular value decomposition of the sub-MDMs to obtain singular value distributions as well as singular vectors which we analyse individually and use for the MUltiple SIgnal Classification (MUSIC) TR imaging method. The obtained images from the these localised sub-MDMs collectively yield to clearer
    images of scenarios than we can obtain using the full-MDM.
    Original languageEnglish
    Pages (from-to)3065 - 3072
    Number of pages8
    JournalIEEE Transactions on Antennas and Propagation
    Volume65
    Issue number6
    Early online date24 Apr 2017
    DOIs
    Publication statusPublished - Jun 2017

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