单基线干涉仪无模糊测向方法

A Methode of Single Baseline Interferometer Direction Finding without Ambiguity

为实现单基线干涉仪无模糊测向,需要解算出相位周期数。通过转动干涉仪天线阵可测量出一段相位-方位曲线,然后遍历所有可能的相位周期数。将该段曲线与干涉仪理论的相位-方位曲线在不同起始方位进行对比,统计天线阵转动角度范围内测量相位值与理论相位值差值的方差。相位差值方差最小时对应的相位周期数即为本次测量的相位周期数,从而实现单基线干涉仪解模糊。

In order to get unambiguous direction finding result of single-baseline interferometer,the number of phase period is needed.By rotating the interferometer array,a measured phase-azimuth curve can be obtained.Then,all possible phase period numbers are traversed.The phase-azimuth curve is compared with the theoretical phase-azimuth curve of the interferometer at different starting azimuth.The variance of the difference between the measured phase value and the theoretical phase value within the rotation angle range of the antenna array is counted.The phase period number of this measurement can be determined when variance of phase difference is the smallest,so as to realize the resolution of single-baseline interferometer ambiguity.