Through-the-Wall SAR Attributed Scattering Center Feature Estimation

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 funct...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2009-05, Vol.47 (5), p.1338-1348
Main Authors: Ertin, E., Moses, R.L.
Format: Article
Language:English
Subjects:
Algorithms
Buildings
Cost function
Dielectrics
Estimates
Feature extraction
Maximum likelihood detection
Maximum likelihood estimation
maximum-likelihood (ML) estimation
radar imaging
Radar scattering
radar signal processing
Reconstruction
Reconstruction algorithms
Reflection
Scattering
Surface reconstruction
Synthetic aperture radar
Transfer functions
Walls
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Summary: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.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2008.2008999