相控阵子阵级和差多波束测角方法  

Monopulse angle estimation using sum-difference multi-beamforming based on the phased array at the sub-array level

作　　者：曾操[1] 陈昊[2] 何学辉[1] 杨扬[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]中国电子科技集团公司第27研究所,河南郑州450000

出　　处：《西安电子科技大学学报》2013年第1期19-25,43,共8页Journal of Xidian University

基　　金：国家重点基础研究发展规划(973计划)资助项目(2011CB707001);长江学者和创新团队发展计划资助项目(IRT0954);国家自然科学基金资助项目(61101243);重点实验室基金资助项目;中央高校基本科研业务费专项资金资助项目(K50510020028)

摘　　要：针对大型相控阵多目标单脉冲测角问题,提出了一种利用和差多波束在子阵级实现多目标测向的方法.首先,通过合并阵元输出降低系统复杂度;其次,通过多套子阵级仅相位导向矢量和对称取反方式实现和差多波束;最后,只需获得方位及俯仰维法线斜率,就可估计任意指向波束内的目标二维偏角.与子阵级四指向和差测角方法相比,所提方法具有测角精度高和实现简单的优点.实测和仿真数据处理结果显示了方法的有效性和优越性.For the problem of monopulse angle estimations of multiple targets based on the large phased array,a method for estimating bias angles using sum-difference multi-beamforming at the sub-array level is proposed.Firstly,system complexity is reduced by combining the outputs of sensors;secondly,sum-difference multiple beamformings are achieved by phased-alone sub-array steering vectors with the anti-symmetric mode;finally,the 2-dimensional bias angles of targets in arbitrary steering beams are estimated based on the two slopes along azimuth and elevation axes pointing to the normal.Compared with the method of four steering sum-difference beamforming,the proposed method has the advantages of higher accuracy and lower complexity.The measured and simulated data show the effectiveness and superiority of the proposed method.

关 键 词：单脉冲测角 和差 多波束形成 子阵级处理 

分 类 号：TN911.7[电子电信—通信与信息系统]