基于造表数据及广义最小二乘法的干涉仪测向方法

A Direction Finding Method Based on Interferometer Using Correction Table and Generalized Least Squares Estimation

在干涉仪测向系统基于外校正造表数据进行测向时,常基于等加权最小二乘法进行来波方向估计。这在采用多通道同时测向体制或各通道之间相位测量误差不一致时往往无法得到来波方向的最优估计。提出一种基于外校正造表数据和广义最小二乘法的测向方法,综合考虑了造表与实际测向时不同通道的相位差测量误差及时分/同时测向体制的因素,可以得到统计最优的测向结果。

Equally weighted least squares method is commonly used when an interferometer system is used for direction finding based on datasets in the system correction table.Such treatment usually leads to suboptimal estimates when the phase differences are simultaneously measured or the phase measurement variance of different receiving channel are different.A direction finding method based on system correction table and generalized least squares method is proposed in this paper.The proposed method comprehensively considers the different phase measurement variance of different receiving channels when establishing the correction table and measuring the angle of arrival.The method also takes the time division or simultaneous measurement mechanism into account.Statistically optimal estimates can be achieved using the proposed method.