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Compared with traditional linear Synthetic Aperture Radar (SAR), Circular-SAR(CSAR) can achieve 360-degree observation of targets. For this reason, CSAR is the best mode of SAR to exploit target feature extraction on azimuth directions. Over larger azimuth angular extents the energy reflected by targets is, in general, not uniform and most targets exhibit only limited scattering persistence. The algorithm...
The target feature is sensitive to the aspect angle of SAR observation, making the interpretation and target recognition of the SAR image difficult. The information acquired from a certain aspect angle is partial and incomplete, and the multi-aspect observations have the potential to improve the SAR performance in this aspect. Three topics of fine feature description of multi-aspect SAR observations...
Multi-aspect observation can obtain the target's multi-aspect scattering feature, and has potential to improve the SAR performance in the applications of target classification and recognition. This paper presents a time-division scanning mode based on Single Phase Centre Multiple Azimuth Beam (SPC-MAB) technique. By applying this new mode, Synthetic aperture radar (SAR) can obtain multi-aspect data...
In circular synthetic aperture radar (CSAR), echo data simulation can provide ideal echo data for the processing of imaging and performance analysis. However, when the target scene is large, the amount of echo data is also large according to Nyquist sampling theorem. If the traditional serial computing way based on CPU is used, then the execution time is long. In this paper, we adopt graphic processing...
In circular synthetic aperture radar (CSAR), radar collects data over a circular trajectory. This wide-angle non-linear collection geometry makes CSAR capable of obtaining both two-dimensional (2D) high resolution image and three-dimensional (3D) image. In this paper, compressive sensing technique is used in 3D CSAR imaging. Not only echo samples used in imaging are greatly reduced, but also the imaging...
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