Noniterative quality phase-gradient autofocus (QPGA) algorithm for spotlight SAR imagery
HL Chan, TS Yeo - IEEE Transactions on Geoscience and …, 1998 - ieeexplore.ieee.org
The phase-gradient autofocus (PGA) technique is robust over a wide range of imagery and
phase error functions, but the convergence usually requires four-six iterations. It is …
phase error functions, but the convergence usually requires four-six iterations. It is …
A generalized phase gradient autofocus algorithm
A Evers, JA Jackson - IEEE Transactions on Computational …, 2019 - ieeexplore.ieee.org
The phase gradient autofocus (PGA) algorithm has seen widespread use and success
within the synthetic aperture radar (SAR) imaging community. However, its use and success …
within the synthetic aperture radar (SAR) imaging community. However, its use and success …
Semiparametric statistical stripmap synthetic aperture autofocusing
TM Marston, DS Plotnick - IEEE Transactions on Geoscience …, 2014 - ieeexplore.ieee.org
Autofocusing synthetic aperture imagery by maximizing a statistical quality metric such as
contrast or sharpness is a well-documented approach in both synthetic aperture radar (SAR) …
contrast or sharpness is a well-documented approach in both synthetic aperture radar (SAR) …
Two-dimensional phase gradient autofocus
DW Warner, DC Ghiglia, A Fitzgerrell… - … from Incomplete Data, 2000 - spiedigitallibrary.org
High-resolution synthetic aperture radar (SAR) images can be blurred by phase
perturbations induced by uncompensated sensor motion and/or unknown propagation …
perturbations induced by uncompensated sensor motion and/or unknown propagation …
Extending the phase gradient autofocus algorithm for low-altitude stripmap mode SAR
DG Thompson, JS Bates… - Proceedings of the 1999 …, 1999 - ieeexplore.ieee.org
The phase gradient autofocus (PGA) algorithm has been widely used in spotlight synthetic
aperture radar (SAR) to remove motion-induced blurs in the images. The PGA algorithm has …
aperture radar (SAR) to remove motion-induced blurs in the images. The PGA algorithm has …
[引用][C] PACE: An autofocus algorithm for SAR
J Kolman - IEEE International Radar Conference, 2005., 2005 - ieeexplore.ieee.org
A highly accurate phase error estimation algorithm can enable or enhance the performance
of many existing and emerging applications of synthetic aperture radar (SAR). In some …
of many existing and emerging applications of synthetic aperture radar (SAR). In some …
Robust autofocusing approach for highly squinted SAR imagery using the extended wavenumber algorithm
For highly squinted synthetic aperture radar (SAR) imaging, the wavenumber domain SAR
processing algorithm is commonly accepted as an ideal solution to SAR focusing in the case …
processing algorithm is commonly accepted as an ideal solution to SAR focusing in the case …
A coarse-to-fine autofocus approach for very high-resolution airborne stripmap SAR imagery
J Li, J Chen, P Wang, O Loffeld - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
An autofocus operation is an indispensable procedure to obtain well-focused images for
synthetic-aperture radar (SAR) systems without precise navigation devices. Three …
synthetic-aperture radar (SAR) systems without precise navigation devices. Three …
Sharpness-based autofocusing for stripmap SAR using an adaptive-order polynomial model
A novel autofocusing technique is developed for image from stripmap-mode synthetic
aperture radar (SAR) data. The approach is based on maximizing the image sharpness …
aperture radar (SAR) data. The approach is based on maximizing the image sharpness …
A less-memory and high-efficiency autofocus back projection algorithm for SAR imaging
K Hu, X Zhang, S He, H Zhao… - IEEE Geoscience and …, 2014 - ieeexplore.ieee.org
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 …
aperture radar. However, the influences of wind field and turbulence on the platform make …