提高相位差测量精度的野值剔除算法研究

干涉仪测向系统中,方位角是通过天线阵元间的接收信号相位差得到的,提高相位差测量精度对方位角精度提高是有利的。运用3种剔除野值方法来提高相位差精度：莱以特准则、平滑滤波法和极坐标变换算法。极坐标变换法克服了角度模值运算带来的不必要的误差,及时检测、剔除野值,校正了相位差参数。与前面2种方法相比,更适应角度运算,而且计算简便、精度高,便于工程实现。

Research on Outliers Eliminating Algorithm for Improving Phase Difference Measuring Precision

In the interferometer direction finding systems,the angle of arrival(AOA)is obtained by measuring phase differences among antenna array elements.Improvement on phase difference precision is helpful for improving AOA precision.Three methods to eliminate outliers: Lyite rule,smoothing and filtering and polar coordinate transforming algorithm,are put forward to improve the precision of phase difference.The unnecessary error created in angle module calculation is overcome by polar coordinate transformation,and the parameter of phase difference is revised after checking in time and outliers eliminating.In contrast with the first two methods,the third one is more adaptive for angle calculation,as well as easy to calculate,simple to implement in engineering with high precision.