Coherent spatial filtering for SAR detection of stationary targets |
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Authors: | Jen King Jao Lee CE Ayasli S |
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Institution: | Lincoln Lab., MIT, Lexington, MA; |
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Abstract: | Analysis of UHF synthetic aperture radar (SAR) images has revealed a spatially correlated phase structure over a resolved target such as a long wire or a large truck. This phase variation, approximated by a simple, range-dependent factor 4πr/λ, results in a line-shaped image spatial spectrum. Such image phase and spectral features can be exploited by coherent spatial filtering to improve target-to-clutter ratios of large targets and stationary target detectability in a strong clutter environment |
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