Analysis on the Non-uniform Sampling of Displaced Phase Center Multiple-beam SAR Systems
Gao Can-guan①② Deng Yun-kai① Feng Jin① Yan He①②
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(Graduate University of the Chinese Academy of Sciences, Beijing 100039, China)
Abstract：In this paper, influence of azimuth non-uniform sampling on SAR systems with multiple-receive apertures in azimuth is derived theoretically. The analysis shows that several ghosting peaks are presented around the main peak, and at the same time non-uniform sampling will cause peak gain loss and the broadening to the main beam. Formulas to calculate the Peek-to-Ghost-Ratio (PGR) and peak gain loss are given, which show that they are related to the degree of non-uniform and the azimuth oversampling ratio quantitatively. The correctness of these formulas is validated further by simulation experiments.
郜参观, 邓云凯, 冯锦, 闫贺. 非均匀采样对偏置相位中心多波束SAR性能影响的分析[J]. 电子与信息学报, 2012, 34(6): 1305-1310.
Gao Can-Guan, Deng Yun-Kai, Feng Jin, Yan He. Analysis on the Non-uniform Sampling of Displaced Phase Center Multiple-beam SAR Systems. , 2012, 34(6): 1305-1310.
2012, Vol. 34 
