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.
作者
刘光炎
孙进平
LIU Guangyan;SUN Jinping(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China;School of Electronics and Information Engineering,Beihang University,Beijing 100191,China)
出处
《现代雷达》
CSCD
北大核心
2022年第11期39-43,共5页
Modern Radar
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
linear-array synthetic aperture radar
array mode
sub-array aperture
noise equivalent sigma zero
azimuth-ambiguity-to-signal ratio
