西安电子科技大学学报（自然科学版）2017，Vol.44Issue(5)：58-63,6.DOI:10.3969/j.issn.1001-2400.2017.05.010
一种高轨SAR带宽与合成孔径时间的设计方法
Design method for bandwidth and synthetic aperture time in GEOSAR
摘要
Abstract
The complex relative motions between the Radar platform and the targets are more complex in geosynchronous Synthetic aperture radar (GEO SAR). The assumption that range and azimuth are uncoupled in Low-Earth-Orbit SAR does not hold in GEO SAR.The common calculation method for bandwidth and synthetic aperture time cannot be used in GEO SAR.In this paper,a method suit able for GEO SAR is proposed to design imaging parameters including the bandwidth and synthetic aperture time. First,a resolution analysis method with analytical expression is deduced based on geometrical mapping,and then based this expression,the bandwidth and the synthetic aperture time are optimized to meet the resolution's needs on value and shape(close to a circle).Finally,a design example in a GEO ellipse orbit is given,and the resolution analysis result corresponds to the image obtained by the Back Proj ection (BP) method.The designed bandwidth and synthetic aperture time are also provided.Simulation results validate the effectiveness of the proposed method in the GEO SAR system design.关键词
高轨合成孔径雷达/信号带宽/合成孔径时间/分辨率椭圆/模糊函数Key words
GEO SAR/signal bandwidth/synthetic aperture time/resolution ellipse/ambiguity function (AF)分类
信息技术与安全科学引用本文复制引用
刘文康,孙光才,陈溅来,邢孟道..一种高轨SAR带宽与合成孔径时间的设计方法[J].西安电子科技大学学报（自然科学版）,2017,44(5):58-63,6.基金项目
国家自然科学基金创新群体资助项目(61621005) （61621005）
