摘要
提出了用均匀平行线阵和阵元输出信号的时间延迟估计时间欠采样来波频率、方位角和仰角的方法．该算法在ＤＦＴ波束空间使用ＰＲＯＥＳＰＲＩＴ方法，实现频率无模糊估计，完成来波信号频率和角度的估计．频率间接估计算法是先估计数字频率，然后用数字频率求模拟频率，其估计方差比直接估计算法的方差要小几个数量级．仿真实验表明了算法的有效性．
A method is proposed to estimate real time frequency and azimuth and elevation angles of arrival with parallel uniform linear arrays and elements output signal delay.The method uses PRO ESPRIT algorithm in DFT beam space.It can estimate the frequency and angles with sub Nyquist sampling.The analog frequency is estimated by general eigenvalue in the direct method.The alias zone of frequency can be determined by the estimation of analog frequency.Then,the digital frequency is estimated,and the analog frequency is calculated by digital frequency in the indirect method.The variance of the frequency estimates of indirect method is more little than that of the direct method.Simulations are presented demonstrating the capabilities of the method.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1998年第5期522-524,共3页
Journal of Beijing University of Aeronautics and Astronautics
基金
国防预研科学基金
关键词
电子战
频率测量
测向
参数估计
欠采样
frequency measurement
orientation
parameter estimation
sub Nyguist sampling
