May 2021
Intermediate to advanced
672 pages
16h 10m
English
Content preview from Inverse Synthetic Aperture Radar Imaging With MATLAB Algorithms, 2nd Edition
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7Scattering Center Representation of Inverse Synthetic Aperture Radar
In radar imaging, the scattering center concept provides various advantages, especially when dealing with radar cross‐sections of objects and synthetic aperture radar/inverse synthetic aperture radar (SAR/ISAR) imaging. After the object is illuminated by an electromagnetic (EM) wave, some locations on the object provide localized radiation/scattering energy toward the observation point. The locations of these concentrated sources of scattering energy are called scattering centers. The use of the scattering center model provides a very sparse representation of ISAR imagery such that EM scattering from complex bodies can be modeled as if it is emitting from a discrete set of points on the target (Hurst and Mittra 1987; Yu et al. 1991; Carriere and Moses 1992; Bhalla and Ling 1996; Chen and Ling 2002) as illustrated in Figure 7.1. Such representation is so powerful that it may provide many advantages, including the following:
- A simple and sparse representation of the EM scattering and/or SAR/ISAR imagery can be obtained.
- Since the model is sparse, the scattering data and/or SAR/ISAR image can be compressed with high data compression ratios.
- Because of the fact that the new data set is much smaller than the original data set, the reconstruction of the scattering data and/or SAR/ISAR image can be obtained quickly.
- The model can be used to interpolate the scattering data and/or SAR/ISAR image with infinite resolution. ...
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