Optimal sharpness function for SAR autofocus

Timothy J. Schulz

doi:10.1109/LSP.2006.881525

2007-01-01

PRE

Timothy J. Schulz *

DOI：10.1109/LSP.2006.881525

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摘要

En 中文

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.

Keyword:

MAP estimation

synthetic aperture radar (SAR)

期刊

IEEE Signal Processing Magazine

IF:

9.6

论文数:

1.1W

被引数:

1.7W

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