Title :
An optimal method for phase error estimation in SAR imagery
Author :
Ye, Wei ; Yeo, Tat Soon ; Bao, Zheng
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
A new method of phase error estimation that utilizes the weighted least square (WLS) algorithm is presented for SAR autofocus applications. The method has the capability to estimate all kinds of phase errors, no matter they are of low-order, high-order or random. The WLS estimation is optimal in the sense that it has the minimum variance of the estimation error. Excellent results have been obtained in autofocusing experiments
Keywords :
geophysical signal processing; geophysical techniques; least squares approximations; radar imaging; remote sensing by radar; synthetic aperture radar; SAR; SAR imagery; autofocus; autofocusing; geophysical measurement technique; land surface; optimal method; phase error estimation; radar imaging; radar remote sensing; synthetic aperture radar; terrain mapping; weighted least square algorithm; Clutter; Electronics packaging; Error analysis; Image coding; Least squares approximation; Maximum likelihood estimation; Phase estimation; Radar scattering; Signal processing algorithms; Synthetic aperture radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International
Print_ISBN :
0-7803-4403-0
DOI :
10.1109/IGARSS.1998.699706
