中文摘要：

针对超宽带探地雷达成像算法普遍存在成像模糊、计算量大、不适合实时处理等问题，提出一种基于椭圆包络线算法的探地雷达目标边界成像方法。该算法以不同介质内电磁波运行距离分段相加的方法计算椭圆长轴，使其适用于多层介质下探地雷达目标成像。FDTD数值仿真结果表明，椭圆包络线算法对于浅层目标体边界构造准确，运算速度快，对目标解释更精确。

英文摘要：

Existing ultra-wideband ground penetrating radar （GPR）imaging algorithms suffer from blur imaging and high computational complexity and thus not suitable for real-time processing.Envelope algorithm is extended to GPR imaging,in which the major axis of ellipse is approximately calculated for coping with multi-media underground.FDTD experimental data shows that the proposed algorithm is of much lower computational complexity and can describe target with more accu-rate boundary structure.