SAR image autofocus utilizing minimum-entropy criterion

T Zeng, R Wang, F Li - IEEE Geoscience and Remote Sensing …, 2013 - ieeexplore.ieee.org
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 …
被引用次数：135 相关文章 所有 3 个版本
[PDF] researchgate.net

Minimum-entropy-based autofocus algorithm for SAR data using chebyshev approximation and method of series reversion, and its implementation in a data processor

T Xiong, M Xing, Y Wang, S Wang… - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
A novel autofocus method for synthetic aperture radar (SAR) image is studied. Based on a
quadratic model for the phase error within each sub-area (narrow strip× sub-aperture) after a …
被引用次数：71 相关文章 所有 5 个版本
[PDF] researchgate.net

SAR minimum-entropy autofocus using an adaptive-order polynomial model

J Wang, X Liu - IEEE Geoscience and Remote Sensing Letters, 2006 - ieeexplore.ieee.org
A new algorithm is presented for autofocus in synthetic aperture radar imaging. Entropy is
used to measure the focus quality of the image, and better focus corresponds to smaller …
被引用次数：169 相关文章 所有 8 个版本
[PDF] archive.org

Weighted least-squares estimation of phase errors for SAR/ISAR autofocus

W Ye, TS Yeo, Z Bao - IEEE Transactions on Geoscience and …, 1999 - ieeexplore.ieee.org
A new method of phase error estimation that utilizes the weighted least-squares (WLS)
algorithm is presented for synthetic aperture radar (SAR)/inverse SAR (ISAR) autofocus …
被引用次数：318 相关文章 所有 10 个版本

Efficient nonparametric ISAR autofocus algorithm based on contrast maximization and Newton's method

J Cai, M Martorella, S Chang, Q Liu… - IEEE Sensors …, 2020 - ieeexplore.ieee.org
Phase autofocus is a significant step in translational motion compensation for inverse
synthetic aperture radar (ISAR) imaging. Among the existing autofocus methods, contrast …
被引用次数：34 相关文章 所有 5 个版本

Knowledge-aided 2-D autofocus for spotlight SAR range migration algorithm imagery

X Mao, X He, D Li - IEEE Transactions on Geoscience and …, 2018 - ieeexplore.ieee.org
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 …
被引用次数：69 相关文章 所有 2 个版本

An experimental study of a new entropy-based SAR autofocus technique

RLJ Morrison, DCJ Munson - … . International Conference on …, 2002 - ieeexplore.ieee.org
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 …
被引用次数：41 相关文章
[PDF] researchgate.net

Fast entropy minimization based autofocusing technique for ISAR imaging

S Zhang, Y Liu, X Li - IEEE Transactions on Signal Processing, 2015 - ieeexplore.ieee.org
Autofocusing technology is an essential step of Inverse Synthetic Aperture Radar (ISAR)
imaging, whose performance has great influence on the quality of the radar image. As far as …
被引用次数：152 相关文章 所有 5 个版本

Minimum entropy via subspace for ISAR autofocus

P Cao, M Xing, G Sun, Y Li… - IEEE Geoscience and …, 2009 - ieeexplore.ieee.org
In this letter, a novel approach to autofocus for inverse synthetic aperture radar (ISAR)
imaging called minimum entropy via subspace autofocus is presented. This scheme uses …
被引用次数：81 相关文章 所有 4 个版本

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 …
被引用次数：64 相关文章 所有 3 个版本