基于行星际闪烁望远镜的数字波束合成技术研究  

Research on Digital Beamforming Technology for Interplanetary Scintillation(IPS)Telescope

作　　者：杨轩[1,2] 陈林杰 荣健[1] 颜毅华[2,3] Yang Xuan;Chen Linjie;Rong Jian;Yan Yihua(University of Electronic Science and Technology of China,Chengdu 610066,China;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]电子科技大学,四川成都610066 [2]中国科学院国家天文台,北京100101 [3]中国科学院大学,北京100049

出　　处：《天文研究与技术》2020年第2期152-162,共11页Astronomical Research & Technology

基　　金：国家自然科学基金(11573043,11790305,11433006)资助.

摘　　要：对于拟建设的子午工程二期中的明安图行星际闪烁望远镜,数字波束合成技术是其中一项关键技术.针对现有数字波束合成算法无法满足行星际闪烁望远镜的应用需求,对现有的数字波束合成算法进行改进和优化,提出了一种适应于明安图行星际闪烁望远镜的波束合成算法.仿真结果显示,该算法能够很好地满足行星际闪烁望远镜的需求.同时,在单个波束的基础上,也提出了多波束合成的算法,并进行了算法的仿真.For the Mingantu interplanetary scintillation telescope of the Meridian II project,the digital beamforming technology is one of the key technologies.Since the present digital beamforming algorithms cannot match the requirements of the interplanetary scintillation telescope.In this paper,the existing digital beamforming algorithm-the Linear Constrained Minimum Variance(LCMV)algorithm is improved and optimized.The method of setting virtual interference is used to reduce the sidelobe of array pattern and the method of subarray is used to reduce the complexity of the algorithm.The improved LCMV algorithm is a digital beamforming algorithm suitable for Mingantu interplanetary scintillation telescope.The simulation results show that the algorithm can meet the needs of IPS telescope very well.Meanwhile,based on the single beam algorithm,an algorithm of multi-beamforming has also been proposed and discussed.

关 键 词：行星际闪烁(IPS)望远镜 数字波束合成算法 线性约束最小方差算法 

分 类 号：P161.1[天文地球—天文学]