摘要:基线长度越长, 测向精度越高, 当基线长度大于信号半波长时, 会存在相位模糊, 传统的解模糊方法常常需要用到多组基线.在分析了时差测向系统和干涉仪测向系统的基础上, 提出了基于时差解相位干涉仪模糊实现测向的方法, 并分析了正确解干涉仪模糊所需的时差测量精度以及时间差精度不足以正确解相位模糊时对方位测量精度的影响, 认为在基线长度较长时, 如果错误模糊数和正确模糊数差距不大, 方位测量精度能够满足工程需求, 结合高精度到达时间测量技术, 可以得到满足工程需要的方位测量精度.该方法只需一条基线两个天线就能实现一维测向, 所需设备量少, 能够降低设备体积、重量、功耗等要求.%The longer the length of the baseline is, the higher the accuracy of the direction finding (DF) is.When the baseline length is longer than the half-wavelenght of the signal, the phase ambiguity will occur.Multi-baseline is used in the traditional method of unwrapping phase ambiguity.This paper analyzes time difference direction finding system and interferometer direction finding system, proposes a method unwrapping phase ambiguity based on time difference, and analyzes the time difference accuracy needed to unwrap phase ambiguity correctly and the influence of time difference accuracy on direction finding accuracy when the time difference accuracy is not enough for solving phase ambiguity correctly, and the conclusion is that:if the difference between the wrong ambiguity and correct ambiguity is little, the accuracy of direction finding can meet the engineering requirement when the baseline length is long enough.Combined with the highaccuracy time of arrival measurement technology, the DF accuracy can meet the engineering requirements.In this method, one baseline with two antennas realizes one-dimensional direction finding, the count of devices is few, and the requirement of the volume, weight and power dissipation is reduced.