一般构型双基地SAR成像分辨特性分析  

Analysis of Imaging Resolution Characteristic for Bistatic SAR with General Configuration

作　　者：陈麒[1] 祝明波[1] 邹小海[1] 李相平[1] 于晶[1] CHEN Qi ZHU Ming-bo ZOU Xiao-hai LI Xiang-ping YU Jing(Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University, Yantai, Shandong 264001, China)

机构地区：[1]海军航空工程学院电子信息工程系,山东烟台264001

出　　处：《信号处理》2017年第6期775-780,共6页Journal of Signal Processing

基　　金：国家重点实验室开放课题基金(CEMEE2016K0201B)资助课题

摘　　要：分辨率是体现双基地合成孔径雷达(synthetic aperture radar,SAR)成像质量的一个重要参数。本文针对一般构型的双基地SAR成像分辨率计算问题,首先在空间梯度法的基础上,推导了双基地SAR地距分辨率的计算公式,根据收发平台对目标产生的多普勒频率变化,推导了双基地SAR方位分辨率的计算公式。然后基于理论推导和仿真指出影响双基地SAR分辨率的真正因素。最后,分析了三种几何构型下地面成像区域的地距分辨率和方位分辨率,为双基地SAR的系统设计提供了参考。Resolution is an important parameter that reflects the imaging quality of bistatic synthetic aperture radar （SAR）. The calculation of general configuration bistatic SAR resolution is researched in this paper. Firstly, formula of ground resolution is derived based on the special gradient method and formula of azimuth resolution is derived according to the change of Doppler frequencies from transmit and receive platform. Then the real factors that affect the bistatic SAR resolution are pointed out based on theory derivation and simulation. Finally, analysis of ground resolution and azimuth resolution for imaging area under three different kinds of configuration is presented, which can provide reference for bistatic SAR system design.

关 键 词：一般构型 双基地 合成孔径雷达 地距分辨率 方位分辨率 

分 类 号：TN959.3[电子电信—信号与信息处理]