摘要
根据返回散射电离层回波特性,提出了基于Capon波束形成、对角加载以及加窗技术的返回散射回波DOA(Direction Of Arrival)估计的方法.利用“L”型短波二维天线接收阵列实现了返回散射电离层回波到达角的探测,获得频率-群路径-回波仰角电离图,收发站的直达波信号和准垂测信号的DOA估计结果验证了探测系统的准确性.
According to the ionospheric backscatter echoes characteristics,a method of DOA(Direction Of Arrival)estimation based on Capon beamforming,diagonal loading and windowing technology is proposed.The arrival angle of backscatter echoes is obtained by using the“L”type short wave two-dimensional receiving array.The frequency-group-elevation ionogram is obtained.The accuracy of the backscatter system is verified by the DOA estimation of direct wave and quasi-vertical signals.
作者
张成峰
王世凯
华彩成
李强
ZHANG Cheng-feng;WANG Shi-kai;HUA Cai-cheng;LI Qiang(China Research Institute of Radio Wave Propagation,Qingdao,Shandong 266107,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2020年第9期1868-1872,共5页
Acta Electronica Sinica
基金
国防技术基础(No.JSHS2016210C009,No.JSHS2018210A001)。
关键词
返回散射探测
空间谱估计
对角加载
仰角
HF backscatter sounding
spatial spectral estimation
diagonal loading
elevation
