时变海面舰船目标动态雷达特征信号模型

摘要

提出了一种时变海面舰船目标动态雷达特征信号的仿真方法.建立了海面舰船目标雷达回波多径效应模型、二维动态粗糙海面的时变复反射系数模型和动态海面舰船运动的水动力模型,并同目标电磁散射计算的高频方法相结合,形成了时变海面舰船目标动态雷达特征信号仿真模型.利用海面浮球的测量数据对模型进行了验证,并对典型舰船目标的动态雷达特征信号进行了仿真和分析.%A radar signature generation model for ships on time-varying sea surface is proposed. The multipath electromagnetic (EM) scattering model, the time-evolving complex reflection coefficient model for sea surfaces and the ship motion dynamics are developed. A radar signature model for ships over time-evolving sea surface is then established based on the above three models in conjunction with high-frequency asymptotic techniques for EM scattering calculation. The model is validated by measured data for a buoy over sea surface. The time-varying scattering signatures for a typical ship on time-evolving sea surface are simulated and analyzed.