Autofocus is an essential technique for airborne synthetic aperture radar (SAR) imaging to
correct phase errors mainly due to unexpected motion error. There are several well-known …

Autofocus is a crucial step for Synthetic Aperture Radar (SAR) image formation. The choice
of autofocus strategy is highly dependent on the compromise between SAR processing …

Phase Gradient Autofocus (PGA) is an algorithm developed to estimate phase errors in
synthetic aperture radar (SAR) images. It is widely used in SAR image processing and has …

The stage by stage approaching (SSA) entropy minimization approach to synthetic aperture
radar (SAR) autofocus is a modern and innovative technique, which, to date, has not been …

This paper proposes an autofocus method based on minimum-entropy criterion for synthetic
aperture radar imaging. Through minimizing the entropy, an iterative method is derived to …

To focus synthetic aperture radar data suffering from phase errors, a novel autofocus
algorithm is presented. The algorithm uses the coordinate descent technique to estimate the …

Autofocus plays a key role in synthetic aperture radar (SAR) imaging, especially for high-
resolution imaging. In the literature, the minimum-entropy-based algorithms (MEA) have …

An autofocus method was presented based on an entropy criterion for synthetic aperture
radar imaging. An iterative method, through minimizing the entropy, was derived to obtain …

Phase autofocus is a significant step in translational motion compensation for inverse
synthetic aperture radar (ISAR) imaging. Among the existing autofocus methods, contrast …

The limited accuracy of the navigation system leads to deviations between the real and
measured trajectories in airborne synthetic aperture radar (SAR) which results in residual …