基于合成导向矢量广义MUSIC算法的水平极化米波雷达测高方法  

A Height Measurement Method of Horizontally Polarized Meter Wave Radar Based on Synthetic Steering Vector Generalized MUSIC Algorithm

作　　者：王国铉 王鸿帧 郑桂妹[1] 宋玉伟 WANG Guoxuan;WANG Hongzhen;ZHENG Guimei;SONG Yuwei(Air and Missile Defense School,Air Force Engineering University,Xi’an 710051,China)

机构地区：[1]空军工程大学防空反导学院,西安710051

出　　处：《空军工程大学学报》2022年第6期49-56,共8页Journal of Air Force Engineering University

基　　金：国家自然科学基金(61971438)。

摘　　要：米波雷达具有抗击隐身目标和反辐射导弹的天然优势,但其俯仰维波束较宽,探测低空目标时波束打地,多径效应的存在严重影响米波雷达测高精度。针对这一问题,采用均匀线阵米波雷达经典镜像多径传播信号模型,总结归纳了以广义多重信号分类算法为基础的3种测高方法,并在此基础上提出了一种适用于水平极化米波雷达基于合成导向矢量广义MUSIC算法的精确测高方法,仿真实验与性能最优的第三种测高方法进行对比,在重点分析目标仰角、信噪比、快拍数、幅相误差和地面反射系数等因素对低空目标测高性能影响的基础上得出一般性结论,证明了新方法的优越性。Meter wave radar is characterized by the natural anti-stealth and anti-radiation missiles,but is wide in pitch dimension beam,there is a possibility of the beam hitting the ground in detecting low altitude targets,and the existence of multipath effect seriously affects the height measurement accuracy of meter wave radar.The classical mirror multipath propagation signal model of uniform linear array meter wave radar is utilized for summarizing three height measurement methods based on generalized multiple signal classification(MUSIC)algorithm,i.e.the height measurement method based on improved generalized MUSIC algorithm,the joint estimation method of low elevation and multipath attenuation coefficients based on generalized MUSIC algorithm,and the Height measurement method of generalized MUSIC algorithm based on reasonable weight.Based on the analysis of the above algorithms,an accurate altitude measurement method is proposed based on synthetic steering vector generalized MUSIC algorithm for horizontally polarized meter wave radar.the simulation experiment is compared with the third height measurement method with the best performance,and a general conclusion is drawn based on the analysis of the influence of target elevation,signal to noise ratio,snapshot number,amplitude phase error,ground reflection coefficient and other factors on the height measurement performance of low altitude targets,which proves the superiority of the new method.

关 键 词：广义MUSIC算法 米波雷达 多径效应 高度测量 

分 类 号：TN953.5[电子电信—信号与信息处理]