三类天线阵列布局的流星雷达到达角估计性能分析  

Comparative analysis of DOA estimated performance of meteor radar antenna array

作　　者：王思远[1] 尹文杰 冯健[3] 刘祎 唐琼 周晨[2] 赵正予 WANG Siyuan;YIN Wenjie;FENG Jian;LIU Yi;TANG Qiong;ZHOU Chen;ZHAO Zhengyu(Institute of Space Science and Applied Technology,Harbin Institute of Technology,Shenzhen 518055,China;Wuhan University,Ionospheric Laboratory,Wuhan 430072,China;China Research Institute of Radiowave Propagation,Qingdao 266107,China)

机构地区：[1]哈尔滨工业大学空间科学与应用技术研究院,深圳518055 [2]武汉大学电子信息学院空间物理系,武汉430072 [3]中国电波传播研究所,青岛266107

出　　处：《电波科学学报》2023年第5期845-852,共8页Chinese Journal of Radio Science

基　　金：地理信息工程国家重点实验室基金(SKLGIE2020-M-3-2)。

摘　　要：为了分析阵列布局对流星雷达到达角(direction of arrival,DOA)估计性能的影响,本文以阵列信号空间谱和克拉美-罗界(Cramer-Rao bound,CRB)作为评估指标,对流星雷达的三种天线阵型即十字阵型、T阵型和L阵型进行了DOA估计性能比较分析,并对比了十字阵型调整天线元间距后与传统方式的性能差异.研究结果表明:三种阵型中,T阵型在精确度和稳定性上均优于其他两种阵型,L阵型在某些方向的DOA中性能最优,但在其他方向上表现较差;改变天线间距会使得某个方向的DOA估计精度提高,但以降低其他方向的DOA精度为代价.In order to analyze the influence of array layout on the performance of direction of arrival(DOA)estimation of meteor radar,this paper conducts a comparison analysis of DOA estimation performance of three antenna configurations,namely crossed array,T array and L array,using the spatial spectrum of the array signal and the Cramer-Rao bound(CRB)as evaluation indicators.The performance difference between traditional spacing and adjusted spacing of antenna elements of crossed array configuration is analyzed.The results show that in the three antenna configurations,the performance of the T array is better than that of the other two configurations in all angles of arrival;the L array performs best over a range of azimuths,but performs poorly at other angles;changing the antenna spacing will improve the accuracy of the DOA estimate in one direction,but at the expense of reducing the accuracy of the DOA estimation in other directions.

关 键 词：流星雷达 阵列信号处理 到达角(DOA)估计 空间谱 克拉美-罗界(CRB) 

分 类 号：P352[天文地球—空间物理学]