线性布阵对临空阵列SAR成像性能的影响分析  

Analysis of Array SAR Imaging Performance Affected by Linear-array Mode in Near Space

作　　者：刘光炎[1] 孙进平[2] LIU Guangyan;SUN Jinping(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China;School of Electronics and Information Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]南京电子技术研究所,南京210039 [2]北京航空航天大学电子信息工程学院,北京100191

出　　处：《现代雷达》2022年第11期39-43,共5页Modern Radar

摘　　要：针对临空线性阵列合成孔径雷达(SAR)系统的成像,简要分析了线性分布式阵列的布阵方式以及由此引起的方位方向图变化;根据SAR成像的需要,分析了分布式阵列子阵稀疏布阵对成像性能的影响,主要包括系统等效噪声系数和方位模糊信号比。仿真分析证明:针对临空超高速阵列SAR成像,需要根据系统性能指标,优化设计SAR系统的布阵方式、子阵方位口径和子阵间距,以满足临空阵列SAR成像的质量。The array mode of linear distributed array and the change of azimuth pattern caused by it are briefly analyzed aiming at the imaging of linear-array synthetic aperture radar(SAR) system in near space. Based on the request of SAR imaging, the effect of imaging performance is analyzed by the sparse sub-array mode of distributed array, including the noise equivalent sigma zero and the azimuth-ambiguity-to-signal ratio.The simulation results prove that the array mode, sub-array azimuth aperture and sub-array spacing of the SAR system should be optimized according to the system performance index to meet the quality of linear-array SAR imaging system in near space.

关 键 词：线性阵列合成孔径雷达 布阵方式 子阵口径 等效后向散射系数 方位模糊信号比 

分 类 号：TN820[电子电信—信息与通信工程]