单相位中心多波束合成孔径雷达的方位模糊分析
Study on Azimuth Ambiguity Analysis of Single Phase Center Multiple Beams Synthetic Aperture Radar
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摘要: 星载合成孔径雷达设计中的一个基本限制是测绘带宽和方位分辨率之间的矛盾，采用单相位中心多波束技术可在一定程度上缓解这一矛盾，从而成为实现高分辨率宽测绘带星载合成孔径雷达系统的一种技术途径。该文在简要介绍单相位中心多波束技术原理的基础上，分析了单相位中心多波束合成孔径雷达方位模糊的来源，提出了单相位中心多波束合成孔径雷达的方位模糊计算公式，并给出了单相位中心多波束合成孔径雷达方位模糊的仿真计算实例。该文分析结果对单相位中心多波束合成孔径雷达的系统设计具有一定的参考价值。Abstract: A fundamental constraint in Synthetic Aperture Radar(SAR) designing is the contradiction between swath width and azimuth resolution. Single phase center multiple beams technique can alleviate the contradiction in some extent and is one of solutions to implement high resolution wide swath spaceborne synthetic aperture radar systems. In this paper, based on the introduction to the principle of single phase center multiple beams technique, the origin of azimuth ambiguities of single phase center multi-beam synthetic aperture radar is analyzed and the formula to compute azimuth ambiguities is presented. Then a simulation example of computing azimuth ambiguities of single phase center multi-beam synthetic aperture radar is given. The results of the paper can be reference for designing single phase center multi-beam synthetic aperture radar systems.
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