Optimal sharpness function for SAR autofocus
Document Type
Article
Publication Date
1-1-2007
Abstract
Phase-error correction through the optimization of an image-domain sharpness function provides one method for the auto-focus of synthetic aperture radar (SAR) imagery. Several ad-hoc sharpness functions have been proposed, implemented, and analyzed, but none of these has been motivated as the solution to a well-defined statistical estimation problem. In this letter, a SAR sharpness function is derived that induces the solution to maximum-likelihood and maximum-posterior estimation for idealized SAR data. Furthermore, a limiting form of the optimal sharpness function is shown to be the popular intensity-squared sharpness. © 2006 IEEE.
Publication Title
IEEE Signal Processing Letters
Recommended Citation
Schulz, T.
(2007).
Optimal sharpness function for SAR autofocus.
IEEE Signal Processing Letters,
14(1), 27-30.
http://doi.org/10.1109/LSP.2006.881525
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/10754