【摘要】 提出了一种基于目标电磁散射特征的海面目标宽带单脉冲雷达三维成像与仿真方法。基于宽带单脉冲雷达体制,结合SAR(Synthetic Aperture Radar,SAR)成像模型,建立了舰船目标宽带单脉冲雷达三维成像模型。该模型根据SAR几何模型和单脉冲天线模型,计算舰船目标宽带动态电磁散射特性,获得每个单脉冲天线阵元接收到的回波信号,通过和差网络分别计算和通道、俯仰差通道和方位差通道信号。利用单脉冲三维成像算法对目标进行了三维成像仿真,分析了不同擦地角情况下的成像结果,验证了模型和仿真方法的正确性。更多还原

【Abstract】 A three-dimensional imaging model for ship target on sea surface is developed based on wide-band monopulse radar system and synthetic aperture radar(SAR) system. The time-varying electromagnetic(EM) scattering of ships is calculated according to the SAR geometry and the monopulse antenna model. The signal received by every antenna element is obtained, and then, the time-domain signals in the sum, azimuth and elevation difference channels are established. Through analyzing the three-dimensional image results in different grazing angles, the model validity is demonstrated.更多还原