由于多径效应的存在,使得米波雷达在低仰角时接收到的回波是两组相干信号,即直达信号和反射信号的矢量叠加.本文提出了一种米波雷达在低仰角情况下DOA(波达方向估计)的新方法,先对实测数据进行线性变换,然后对线性变换后的数据和实测数据的差分结果应用角度超分辨算法,实现米波雷达低仰角的波达方向估计.算法对信号所处环境不敏感,可以有效地克服多径效应.理论分析和计算机仿真都表明新算法的优越性. Due to the existence of multipath effects, the echoes received by the radar at low elevation angles are two groups of coherent signals, namely, the superposition of the direct signal and the reflected signal.We propose a DOA (DOA estimation), the measured data are transformed linearly firstly, and then the angle super-resolution algorithm is applied to the difference between the linearly transformed data and the measured data to realize the DOA estimation at low elevation angle. Insensitive to the environment of the signal, which can effectively overcome the multipath effect.Theoretical analysis and computer simulation show the superiority of the new algorithm.