面向识别的雷达舰船目标低分辨回波仿真技术

Recognition-oriented Echo Simulation of Ship Target for Low Resolution Radar

雷达目标回波的高精度仿真是目标识别系统训练和测试的重要手段。针对低分辨雷达舰船目标自动识别的应用背景,提出了基于模板和模型的低分辨回波仿真技术。根据舰船目标的CAD三维模型,利用电磁计算方法得到全姿态的一维距离像模板。在凝视状态下,利用目标距离像模板和雷达发射信号模拟目标低分辨回波;在扫描状态下,利用全姿态一维距离像重构不同角区中目标的散射中心模型,并结合雷达波束的扫描方式获得了目标的仿真回波。结果表明,所提出的基于模板和模型的回波仿真技术对雷达舰船目标具有良好的低分辨回波仿真能力。

Target echo simulation with high precision is important for training and testing of ship - target recognition. In the application of ship -target recognition, a template and model based method is presented to simulate the low - resolution radar echoes. With the application of 3 D CAD model of ship targets, the high resolution range profile （HRRP） templates at full azimuth angles are computed. Thus, the low -resolution echoes in the staring state are obtained using HRRP templates and radar signals. While in the scanning state, the scattering center models in each angle sector are firstly reconstructed on the basis of high resolution range profiles. Subsequently, with the consideration of antenna scanning the corresponding low - resolution echoes are obtained. The numeric results verify the efficiency of the proposed method.