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• W4285293812 abstract "Range migration (or range focusing) techniques are widely used in optical, acoustic, and microwave real-time image reconstruction methods. They have been successfully applied to far-field 3-D imaging where they rely on plane-wave assumptions, which ignore the data amplitude variation over the acquisition aperture. The accuracy of the plane-wave assumption, however, quickly degrades in close-range imaging, where amplitude variations are significant and where the range to the target is on the order of the range sampling step. Here, we present a range-focusing method of improved accuracy, which is applicable to both far-zone and close-range monostatic radar. It refocuses the system point-spread function (PSF) to any range location, taking into account both magnitude and phase changes. The approach can be applied with any Fourier-based imaging algorithm utilizing the Lippmann–Schwinger equation as the underlying scattering model. Here, it is validated through examples based on simulated and measured data where the images are reconstructed with quantitative microwave holography (QMH). QMH employs measured PSFs to achieve quantitative imaging in real-time. The proposed range-migration method is applicable with measured PSFs, too, leading to reduced system-calibration effort and the ability to focus an image at any desired range." @default.
• W4285293812 created "2022-07-14" @default.
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• W4285293812 date "2022-09-01" @default.
• W4285293812 modified "2023-10-14" @default.
• W4285293812 title "Accurate Range Migration for Fast Quantitative Fourier-Based Image Reconstruction With Monostatic Radar" @default.
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• W4285293812 doi "https://doi.org/10.1109/tmtt.2022.3187090" @default.
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