摘要
地杂波仿真是雷达仿真系统的重点和难点。文中研究了基于高程数据模型的地杂波仿真问题。对利用分形算法产生随机地形的高程数据做了简要概述,并说明了如何对高程数据做平滑处理和着色。在高程数据的基础上,把地面分割成很多散射特性已知的简单的几何散射面单元,详细讨论了利用雷达方程和解析几何的思想计算每个单元的地杂波的功率,然后采用叠加原理对各个单元的功率进行叠加,实现整个地面的地杂波的计算,最后利用OpenGL技术进行着色和显示。上述方法的实验结果取得预期效果,基本符合工程需要。
The simulation of landform＇ s echo wave is the key and knot in radar simulation system. The simulation of landform＇ s echo wave based on DEM is studied. This paper introduces how to use fractal arithmetic to produce random digital elevation and how to smooth and paint digital elevation. Based on DEM, landform is divided into many simple geometry surfaces whose scattering characteristics are known. The paper also discusses how to account the power of each unit landform＇ s echo wave by using radar equation and digital elevation, and then uses the principle of superposition to superpose each unit power, thus achieving the landform＇ s echo wave of entire ground. Finally the back wave digitals are painted and shown by OpenGL technology. The results show that it is fit for project needs.
出处
《计算机仿真》
CSCD
2007年第5期176-178,328,共4页
Computer Simulation
