频域解模糊干涉仪测向方法

The method of interferometer phase un-wrapping in frequency domain

电子战作为现代战争中的重要组成部分,具有不可替代的作用。辐射源测向技术是电子战中的一个重要环节,对战场主动权的归属决定具有重要作用。常用的测向技术主要包括比幅、时差、干涉仪和多普勒等多种定位方式,其中干涉仪测向,因其工程实现简单、成熟且精度高的优势,在电子战中取得了广泛的应用。相对于传统干涉仪利用多基线、多观察角解模糊的方式,提出一种频域解相位模糊方法,挖掘信号内部的相位连续特性,利用固定基线-变化信号波长比的原理进行解相位模糊,简化了传统干涉仪设计与实现的复杂性。理论分析与仿真实验,证明了该方法具有较好的稳健性和测向能力,为解决传统干涉仪相位解模糊的问题提供了一种新思路。

Electronic warfare has became the undisputed important part in the modern warfare.Radio direction finding technique is an important aspect of electronic warfare.It can even determine the battlefield initiative of the future.The existing direction finding technique technology contains that the amplitude method,time difference,interferometer and frequency-doppler direction finding system,interferometer has advantage in maturity,simplicity and high precision in different area.Comparing with the traditional interferometer phase un-wrapping based on muti-baseline,the paper raises a new method based on signal frequency domain,by extracting continuing trait of signal phase,un-wrapping phase by varying the ratio between baseline and signal wavelength,the method simplify traditional interferometer realization.The experiment result show that,the method has good robustness and high-precision DOA estimation,providing a new way to solve phase un-wrapping in traditional interferometer.