系统仿真学报 ›› 2019, Vol. 31 ›› Issue (8): 1477-1483.doi: 10.16182/j.issn1004731x.joss.19-0365

• 专栏:复杂目标与环境物理效应仿真 • 上一篇    下一篇

双/多基SAR回波信号仿真技术研究

刘金1,2, 刘哲1, 倪虹1, 陶青长3   

  1. 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
  • 收稿日期:2019-05-22 修回日期:2019-07-22 发布日期:2019-12-12
  • 作者简介:刘金(1964-),男,吉林大安,博士,研究员,研究方向为系统仿真;刘哲(1991-),女,河北邢台,硕士,工程师,研究方向为雷达成像,雷达回波射频仿真;倪虹(1974-),女,北京,硕士,研究员,研究方向为射频仿真系统,极化雷达,成像雷达。

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

Liu Jin1,2, Liu Zhe1, Ni Hong1, Tao Qingchang3   

  1. 1. Beijing Electro-Mechanical Engineering Institute, Beijing 100074, China;
    2. Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory, Beijing 100074, China;
    3. Tsinghua University, Beijing 100084, China
  • Received:2019-05-22 Revised:2019-07-22 Published:2019-12-12

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。

关键词: 双/多基SAR, 回波仿真, 三维场景目标

Abstract: 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*5m 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.

Key words: Bi-/multistatic SAR, echo simulation, three-dimensional scene target

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