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• W3093670991 abstract "The imagery of airborne highly squinted synthetic aperture radar (SAR) with curved trajectory is a challenging task due to the translational-variant range cell migration (RCM) and azimuth modulation. However, in most cases of practical application, the curved trajectory cannot be accurately known, which brings greater difficulties to the imaging problem. To accommodate these issues, we propose a novel motion modelling and optimisation based imaging algorithm for the highly squinted SAR with unknown curved trajectory. First, to correct the translational-variant RCM, a coarse-to-fine RCM correction scheme as well as a range perturbation approach is applied. Afterwards, an optimisation model of motion information under the criterion of minimum entropy is built during the azimuth processing by nonlinear chirp scaling (NLCS). Correspondingly, a differential evolution (DE) optimisation strategy is proposed to estimate the motion information in an iterative manner. We empirically compare the proposed algorithms with several state-of-the-art highly squinted curved SAR imaging algorithms. Numerical results show the effectiveness of the proposed method in the case without any prior information of the curved trajectory." @default.
• W3093670991 created "2020-10-29" @default.
• W3093670991 creator A5027924825 @default.
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• W3093670991 date "2020-10-23" @default.
• W3093670991 modified "2023-10-18" @default.
• W3093670991 title "Squinted Airborne Synthetic Aperture Radar Imaging with Unknown Curved Trajectory" @default.
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• W3093670991 doi "https://doi.org/10.3390/s20216026" @default.
• W3093670991 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7672571" @default.
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• W3093670991 hasPublicationYear "2020" @default.
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