Superresolution Techniques and ISAR Imaging
Abstract
High-resolution optimal estimation techniques have been applied to the problem area of radar imaging of rotating objects. Typical digital range- Doppler processor operations are described, utilizing several of the many superresolution techniques available in the literature. Their application to the range domain represents new R&D work, wherein multiple scatterers within one range have been resolved without increasing the bandwidth. Simulation results show the feasibility for achieving superresolution in the doppler domain only, the range domain only, or both domains jointly in a three-dimensional (3D) processed image. The capability for focusing upon a small section of the overall image and achieving finer detail (magnification) should be particularly useful. It is concluded that superresolution techniques offer a valuable complement to conventional DFT-ISAR image processing, and should permit either higher resolution images from the same samples, or equal quality images from significantly fewer data samples. The reader is cautioned that these techniques are not applicable in certain situations where 'total coherence' exists over the entire observation interval.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 21, 1990
- Accession Number
- ADA227522
Entities
People
- William F. Gabriel
Organizations
- United States Naval Research Laboratory