双/多基SAR回波信号仿真技术研究  

Study on Simulation Technology of Bi-/multistatic SAR Radio Echo

作　　者：刘金[1,2] 刘哲 倪虹 陶青长[3] Liu Jin;Liu Zhe;Ni Hong;Tao Qingchang(Beijing Electro-Mechanical Engineering Institute, Beijing 100074, China;Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory, Beijing 100074, China;Tsinghua University, Beijing 100084, China)

机构地区：[1]北京机电工程研究所,北京100074 [2]复杂系统控制与智能协同技术重点实验室,北京100074 [3]清华大学,北京100084

出　　处：《系统仿真学报》2019年第8期1477-1483,共7页Journal of System Simulation

摘　　要：结合双/多基SAR线性调频信号回波模型,提出了双/多基SAR基带回波信号仿真方法。提前将成像场景图以特定分辨率进行划分,并预置每个场景单元的电磁散射系数。根据双/多基SAR雷达平台飞行航迹信息,在特定的几何关系下,实时计算双/多基雷达收发天线与目标单元距离、收发天线方向图加权因子等关键参数。通过这些关键因素计算系统响应函数,利用快速卷积的方法实现了复杂场景的双/多基SAR基带回波信号实时仿真,通过仿真验证了该方法的正确性。A real-time bi-/multistatic synthetic aperture radar(SAR) radio frequency signal simulation method for three-dimensional scene target is proposed. This method divides scene map with 5*5 m resolution and presets ackscattering-coefficient. According to the flight path and geometrical model, the key parameters such as the range between SAR and target and the weighting coefficient of the antenna pattern can be calculated. Then, the real-time simulation of bi-/multistatic SAR echo signal is realized in complex scenes by utilizing fast time-domain convolution. The validity of the method is proved by simulation.

关 键 词：双/多基SAR 回波仿真 三维场景目标 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]