星载分离相位中心方位多波束SAR方位向非均匀采样

摘要

The displaced phase centre(DPC) multiple azimuth beam (MAB) approach allows simultaneous wide swath and high resolution synthetic aperture radar (SAR) imaging from a spaceborne system. In this paper, it is pointed out that the azimuth non-uniform sampling is a necessity of spaceborne DPC-MAB-SAR. And fault targets appear due to the effects of non-uniform sampling. Subsequently, several algorithms are presented to eliminate the effects. Finally it is concluded that the method of filter group is the fittest algorithm by the comparisons of all adopted algorithms on image quality and calculation amount.%星载分离相位中心方位多波束合成孔径雷达可同时实现高分辨率、宽测绘带成像.本文进行进一步分析指出,该技术会产生方位向非均匀采样,并最终可导致虚假目标产生.提出了几种消除方位向非均匀采样影响的算法.通过对各种算法进行比较指出,滤波器组法是最为高效的一种算法.