基于空变运动误差分析的微波光子超高分辨SAR成像方法

摘要

针对运动误差空变对实现微波光子雷达超高分辨SAR成像的影响，该文提出了一种基于空变运动误差分析的超高分辨成像方法。首先通过解析求解获得中心波束平面补偿下的剩余空变误差表达式，提出了运动误差空变影响判定准则。接着针对微波光子SAR系统条件的不同判定结果，提出相应的成像流程。最后对所提判定准则与成像方法进行点仿真验证，并对录取的车载10 GHz微波光子超高分辨SAR实测数据进行分析与成像处理，实验结果表明所提方法的有效性。%An ultrahigh-resolution microwave photonic-based Synthetic Aperture Radar (SAR) imaging method based on space-variant motion error analysis is proposed to solve the influence of space-variant motion error on microwave photonic-based SAR imaging. First, the judgment rules of the influence of space-variant motion error are proposed to analyze the residual space-variant motion error. Second, on the basis of the different judgment results of microwave photonic-based SAR system conditions, the corresponding imaging process is proposed. Finally, the proposed judgment rules and imaging method are verified by point simulation, and the measured data of the 10 GHz microwave photonic-based ultrahigh-resolution SAR are analyzed and imaged. The experimental results show the effectiveness of the proposed method.