合成孔径雷达散射波干扰模型(英文)  

Scattering interference model in synthetic aperture radar

作　　者：孙建涛[1,2] 张平[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《中国科学院研究生院学报》2010年第2期212-217,共6页Journal of the Graduate School of the Chinese Academy of Sciences

摘　　要：由于缺少SAR散射波干扰真实数据,建立了SAR散射波干扰的物理模型,分析了地面散射点的分布特征,给出了仿真结果.结果表明,对于极度粗糙地表和中等粗糙地表,散射波干扰充斥于SAR的整个波束,不能采用空间滤波的方式进行干扰抑制;对于中等粗糙地表,增加快时间采样点数,可以增加相关散射点的数量,因此可以用空间-快时间自适应滤波的方法提高干扰抑制性能.Because real data of scattering interference for SAR are not available, a physical model of scattering interference for SAR is presented, and the scenario scatterer distribution characteristics are analyzed in this paper. The simulation results demonstrate that the scatterer incident angles for very diffuse scenario and moderately diffuse scenario cover the whole beam of SAR in azimuth, and then the spatial filtering algorithms are useless. However, numbers of correlated scatterer pairs increase when more samples are employed for the moderately diffuse scenario. Thus, space fast-time adaptive filter can be used to suppress scattering interference for moderately diffuse scenario.

关 键 词：合成孔径雷达 散射波干扰 地表散射模型 

分 类 号：TN958[电子电信—信号与信息处理]