SAR成像系统中的多视处理及多普勒调频斜率的估计

Multiple Look Processing and Estimation of Doppler Frequency Rate f_R in SAR Imaging System

对SAR图象中纹斑噪声的统计特性进行了详细的数学推导,同时对消除纹斑噪声的成像辅助技术———多视处理进行了深入研究,并利用基于多视处理的子孔径相关算法,对SAR系统的多普勒调频斜率fR进行了估计,将其用于成像,其精度和效果都令人满意.

The phenomenon, known as speckle noise in SAR （synthetic aperture radar） image is analyzed, its statistical characteristics are studied, and multiple look processing technique is introduced to reduce speckles. Then, the ＂Sub-Aperture Correlation algorithm＂, which is based on multiple look processing, is used for estimating the key parameters, Doppler frequency rate fR, of SAR imaging system. Using the algorithm, satisfactory imaging results are obtained.