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Through-the-Wall SAR Attributed Scattering Center Feature Estimation

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2 Author(s)
Ertin, E. ; Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH ; Moses, R.L.

We consider characterization of building interior structure from two-pass interferometric circular synthetic aperture radar data. We model returns from complex building structures as the sum of the responses from scattering primitives-plates, dihedrals, and trihedrals-observed through transfer functions that characterize both the transmission through and reflection from dielectric surfaces. Maximum-likelihood estimates for the location of primitive features and wall propagation/reflection parameters are obtained through a two-stage detection-and-estimation algorithm. We employ a sparse reconstruction algorithm to detect primitive signatures in the presence of wall effects and refine our estimates using a nonlinear minimization of local cost functions. We show that using simplified wall and primitive models, we can extract geometrically relevant features which can be combined to reveal 3-D floorplan estimates of buildings. Examples illustrate the effectiveness of the feature extraction approach.

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:47 ,  Issue: 5 )