IEEE Transactions on Aerospace and Electronic Systems · 1999 · 814 citations · 15 references
RadarImage AnalysisEngineeringSar ImagingSynthetic Aperture RadarAutomatic Target RecognitionImaging RadarRadar Image ProcessingInverse ProblemsComputational ImagingRadar Signal ProcessingRadar ApplicationHigher OrderSar DataRadiologyRadar Imaging
The paper proposes a SAR imaging method for moving targets that does not rely on prior knowledge of target motion. The method applies keystone formatting to interpolate the deramped phase history, then performs two‑dimensional focusing to correct quadratic range migration, and finally removes cubic and higher‑order defocusing terms. The technique was validated with SAR data from DARPA’s Moving Target Exploitation program.
A method of forming synthetic aperture radar (SAR) images of moving targets without using any specific knowledge of the target motion is presented. The new method uses a unique processing kernel that involves a one-dimensional interpolation of the deramped phase history which we call keystone formatting. This preprocessing simultaneously eliminates the effects of linear range migration for all moving targets regardless of their unknown velocity. Step two of the moving target imaging technique involves a two-dimensional focusing of the movers to remove residual quadratic range migration errors. The third and last step removes cubic and higher order defocusing terms. This imaging technique is demonstrated using SAR data collected as part of DARPA's Moving Target Exploitation (MTE) program.
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