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Comparison of geometry-based Doppler ambiguity resolver in squint SAR

Doppler centroid is an important parameter for high quality synthetic aperture radar (SAR) imaging. In this paper, several geometry-based Doppler ambiguity resolvers are discussed and compared. The result show that these methods can give accurate estimation of Doppler ambiguity number, and the speed of the iterative scheme and improved Radon transform scheme is much faster than conventional Radon transform method.