合成孔径雷达相干与非相干干扰性能分析  

Performance analysis of coherent jamming and non-coherent jamming against SAR

作　　者：杨立波 高仕博[1,2] 胡瑞光 韦海萍 肖利平[1,2] YANG Libo;GAO Shibo;HU Ruiguang;WEI Haiping;XIAO Liping(Beijing Aerospace Automatic Control Institute,Beijing 100854,China;National Key Laboratory ofScience and Technology on Areospace Intelligence Control,Beijing 100854,China)

机构地区：[1]北京航天自动控制研究所,北京100854 [2]宇航智能控制技术国家级重点实验室,北京100854

出　　处：《系统工程与电子技术》2018年第11期2444-2449,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61603364)资助课题

摘　　要：推导了合成孔径雷达(synthetic aperture radar,SAR)非相干干扰、一维卷积干扰和二维相干干扰成像前后的功率表达式,建立了成像处理增益(imaging processing gain,IPG)关于SAR系统参数和干扰区面积的关系模型和干信比(interference-signal power rate,ISR)方程。分析结果表明,在一定范围内,相干干扰的IPG随干扰区面积增大而减小,当一维卷积干扰的干扰区宽度大于SAR成像前距离分辨率时,其IPG与非相干干扰相同,当二维相干干扰的干扰区宽度和长度分别大于SAR成像前距离分辨率和方位分辨率时,其IPG与非相干干扰之比等于方位过采样率,3种干扰的ISR与IPG具有相同特性。仿真验证分析了所得出的结论。The theoretical expressions for the power before and after imaging processing of non-coherent jamming,1-D convolution jamming and 2-D coherent jamming against synthetic aperture radar(SAR)is deduced,and the imaging process gain(IPG)model and the interference-signal power rate(ISR)about SAR system parameters and jamming areas are established.The theoretical analysis results demonstrate that to a certain extent,the IPG and ISR of coherent jamming decrease as the jamming area increases,and that if the interference region range width of the 1-D convolution jamming is greater than the range resolution before SAR imaging,its IPG and ISR are the same as that of non-coherent jamming,and the results also show that if the interference region range width and azimuth length of the 2-D coherent jamming are greater than the range resolution and azimuth resolution before SAR imaging,the ratio of IPG and ISR between it and non-coherent is equal to the azimuth over-sampling ratio.Simulation corroborates the availability of theoretical analysis results and conclusion.

关 键 词：合成孔径雷达 干扰 成像处理增益 干信比 

分 类 号：TN974[电子电信—信号与信息处理]