Sequence CLEAN: a modified deconvolution technique for microwave images of contiguous targets

High resolution range profiles usually suffer from range sidelobe artifacts which cause reduction in the dynamic range. The sidelobes can be greatly reduced by a deconvolution technique called Coherent CLEAN. The Coherent CLEAN algorithm is based on the assumption that the scene consists of isolated...

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Bibliographic Details
Published in:IEEE transactions on aerospace and electronic systems 2002-01, Vol.38 (1), p.89-97
Main Authors: Bose, R., Freedman, A., Steinberg, B.D.
Format: Article
Language:English
Subjects:
Algorithms
Approximation
Cleaning
Coherence
Deconvolution
Dynamic range
Image reconstruction
Image resolution
Layout
Microwave technology
Microwave theory and techniques
Moon
Point sources
Radar imaging
Radio astronomy
Sidelobes
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Summary:High resolution range profiles usually suffer from range sidelobe artifacts which cause reduction in the dynamic range. The sidelobes can be greatly reduced by a deconvolution technique called Coherent CLEAN. The Coherent CLEAN algorithm is based on the assumption that the scene consists of isolated and independent targets. However, many real-life targets are contiguous. Even if we approximate the contiguous targets by very closely spaced point sources, they can hardly be assumed to radiate independently. The sidelobes and the mainlobes of these closely spaced point sources can interact constructively and destructively causing spurious peaks and peak mislocations. These problems are studied and a variation in the existing Coherent CLEAN algorithm, called Sequence CLEAN, is proposed. Sequence CLEAN is found to work well with actual targets.
ISSN:0018-9251
1557-9603
DOI:10.1109/7.993231