基于线性误差模型的干涉仪系统标校方法

A Calibration Method of Interferometer System Based on Linear Error Model

干涉仪系统利用多个天线构成测向基线,通过测量目标相位信息完成入射角度估计,能实现瞬时高精度测向。针对系统误差影响测向性能这一问题,分析了系统误差来源(包括天线安装误差和系统固定相位误差),建立了干涉仪系统误差线性模型,利用线性最小二乘算法对干涉仪系统中的天线相位误差与基线安装误差进行估计。仿真分析验证了该方法的有效性。

The interferometer system uses multiple antennas to form the baseline of direction finding.By measuring the phase information of the target,the incident angle is estimated,and the instantaneous high-precision direction finding can be achieved.For the problem that system error affects the direction finding performance,the sources of system error are analyzed,including antenna installation error and system fixed phase error.The linear model of interferometer system error is established,and the antenna phase error and base line installation error in interferometer system are estimated by linear least square algorithm.The effectiveness of the method is verified by simulation analysis.