三子孔径算法在米波雷达仰角测量中的应用

为了解决米波雷达仰角估计中的地(海)面多径反射问题,阵列超分辨算法得到了广泛重视,特别是MLE(最大似然估计)算法能够很好地解决多径相干源的测角(波达方向估计)问题。三子孔径算法(3SA)就是在MLE算法的基础上提出的一种算法,该算法在减少运算量的同时保持了较高的测角精度。在三子孔径算法的基础上,利用米波雷达仰角测量模型中目标信号与地(海)面多径反射信号(又称镜像信号)的几何关系,提出了改进的三子孔径算法。同时通过计算机仿真验证了改进算法要优于原始算法。

Application of Elevation Measurement in VHF Radar Using Three Sub-apertures

To deal with the presence of multipath singnal reflected over a smoothing ground (sea) in elevation measurement of VHF radar,array super resolution algorithms get more and more attention,especially maximum likelihood algorithm can solve ore ore ore ore ore ore ore ore apertures algorithm (3SA) is such an algorithm based on maximum likelihood algorithm,which keeps very good precisionand and reduces computation at the same time. Based on three subaperture algorithms we propose a new improved algorithm using the geometry relation of target signal and multipath singnal(called specular signal as well) reflected over a smoothing ground (sea) in VHF radar elevation measurement model.And computer simulation results indicate that the improved algorithm has better performance than the original algorithm.