A novel technique to overcome wall ambiguities in through-the-wall radar imaging applications.
In the through-the-wall radar imaging applications, errors in wall parameters cause targets to be imaged away from their true positions. The shifts of target locations depend on the estimation errors in the wall thickness and dielectric constant as well as the target locations with respect to the an...
| Main Authors: | , |
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| Format: | |
| Language: | English |
| Published: |
2005
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| Online Access: | http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:173093 |
| Summary: | In the through-the-wall radar imaging
applications, errors in wall parameters cause targets to be
imaged away from their true positions. The shifts of target
locations depend on the estimation errors in the wall
thickness and dielectric constant as well as the target
locations with respect to the antenna array. In this paper, we
propose a novel technique that enables proper imaging to be
performed with unknown wall characteristics. In this
technique, the imaging is performed for different sets of the
assumed wall parameters at different standoff distances from
the wall. For each set of wall parameters, the combined
image for different standoff distances is obtained. A
focusing metric is then applied to determine the wall
characteristics corresponding to the maximum sharpness of
the image. The proposed standoff-based imaging technique
has several advantages in practical use, including safety,
covertness, and rapid acquisition time. |
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