分布式小卫星SAR回波信号精确仿真方法研究

Research on Distributed Satellite SAR Echo Signal Accurate Simulation Method

针对分布式小卫星SAR回波信号仿真,建立了回波信号的数学模型,并基于空间坐标变换建立了分布式小卫星SAR回波信号仿真模型。通过计算机仿真,生成了一组Cartwheel构型的主星带伴随星群的分布式小卫星SAR回波信号,并通过成像及干涉处理,得到干涉相位图,验证了模型的有效性。仿真结果证明,本文提出的仿真模型能够精确的模拟分布式小卫星SAR回波信号,并能够灵活地注入各种误差,生成有效的回波仿真数据。

In this paper, an accurate simulation method was presented, The echo signal mathmatics model was founded first, and the distributed satellite SAR echo signal simulation model based on the space coordinate transformation was founded. A set of distributed satellite SAR echo signals were simulated, the formation of the satellites was Cartwheel, one of the satellites transmited signal and others only received signal. After imaging and interferometry processing, the interferometry phase images were achie- ved. The simulation results shows that, the simulation method in this paper can simulate the distributed satellite SAR echo signal accurately, and can also simulate various system errors, the simulated echo signal is demonstrated to be valid.