The improvement in azimuth resolution and/or the increase in the instantaneous beam width
can result in a wide-beam autofocus problem in airborne synthetic aperture radar (SAR) …

Long synthetic aperture time and large instantaneous beam can turn airborne synthetic
aperture radar (SAR) autofocus into a wide-beam autofocus problem; ie, the motion error is …

Existing airborne SAR autofocus methods can be classified as parametric and non-
parametric. Generally, non-parametric methods, such as the widely used phase gradient …

The back projection (BP) algorithm is an accurate time-domain imaging method for synthetic
aperture radar. However, the influences of wind field and turbulence on the platform make …

An autofocus operation is an indispensable procedure to obtain well-focused images for
synthetic-aperture radar (SAR) systems without precise navigation devices. Three …

Autofocus has attracted wide attention for unmanned aerial vehicle (UAV) synthetic aperture
radar (SAR) systems, because autofocus process is crucial and difficult when the phase …

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 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 …

With continuous improvement of the synthetic aperture radar (SAR) resolution, the 2-D
defocus effect in SAR image resulting from uncompensated motion error has made …

Synthetic aperture radar (SAR) imaging suffers from image focus degradation in the
presence of phase errors in the received signal due to unknown platform motion or signal …