星载SAR方位模糊研究  

Research on Azimuth Ambiguty of Spaceborne SAR

作　　者：徐辉[1] 赵迪[2] 辛培泉[1] 何东元[1] 

机构地区：[1]南京电子技术研究所,南京210013 [2]上海卫星工程研究所,上海200240

出　　处：《火控雷达技术》2011年第2期1-5,共5页Fire Control Radar Technology

摘　　要：本文根据方位模糊产生机理详细分析了方位向成像处理参数、波长、方位方向图副瓣对方位模糊的影响。通过分析可知:方位分辨率相同时,低频段SAR系统模糊问题更严重,但可通过提高重频、压低方向图副瓣电平等方法可改善方位模糊,最后仿真验证了上述结论并给出改善方位模糊的设计考虑。The effects, such as azimuth imaging processing parameters, wavelength, azimuth pattern sidelobe on azimuth ambiguity are analyzed based on azimuth ambiguity generating mechanism. It can be known by analyzing that ambiguity problems of SAR syst~~m at low frequency band are more seriously when the azimuth resolution is the same. However the azimuth ambigui：y can be improved by increasing repetition frequency and decreasing the pat- tern sidelobe level. Finally, the aforpesited conclusion is verified by simulation, and the design consideration for im- proving the azimuth ambiguity is presented.

关 键 词：星载合成孔径雷达 方位模糊度 多普勒频率 

分 类 号：TN958[电子电信—信号与信息处理]