Novel autofocus algorithm based on DCT for SAR images

[1] Li F K, Held D N, Curlander J, et al. Doppler parameter estimation for spaceborne synthetic aperture radar[J].IEEE Trans on GRS, 1985, 23(1):47~56 [2] Wahl D E, Eichel P H, Ghiglia D C, et al. Phase gradient autofocus—a robust tool for high resolution SAR phase correction[J]. IEEE Trans on AES, 1994, 30(3):827~835 [3] 武昕伟,朱兆达.一种基于最小熵准则的SAR图像自聚焦算法[J].系统工程与电子技术,2003, 25(7):865~869 Wu Xinwei, Zhu Zhaoda. A novel autofocus algorithm based on minimum entropy criteria for SAR images[J]. Systems Engineering and Electronics, 2003, 25(7):865~869(in Chinese) [4] Charfi M, Nyeck A, Tosser A. Focusing criterion[J]. IEEE Electronics Letters, 1991,27(14):1233~1235 [5] Ahmed N T, Natarajan, Rao K R. Discrete cosine transform[J]. IEEE Trans on Computer, 1974,23(1):90~93. [6] Rao K R, Yip P. Discrete cosine transform:algorithms, advantages, applications[M]. New York:Academic Press,1990 [7] 奥本海姆A V, 谢弗R W, 巴克J B. 离散时间信号处理[M].第二版.西安:西安交通大学出版社, 2001. 474~483 Oppenheim A V, Schafer R W, Buck J R. Discrete-time signal processing[M]. 2nd. Xi’an:Xi’an Jiaotong University Press, 2001.474~483(in Chinese) [8] 张澄波.综合孔径雷达原理、系统分析与应用[M].北京:科学出版社,1989. 163~178 Zhang Chengbo.Synthetic aperture radar theory, system analysis and applications[M].Beijing:Science Press, 1989. 163~178(in Chinese)