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| 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) |
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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.
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Received: 28 October 2011
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Corresponding Authors:
Gao Can-guan
E-mail: YLcggao@sohu.com
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2012, Vol. 34 
