基于相位差变化率的无源定位技术研究

基于单站无源定位技术研究基础,对相位差变化率定位原理进行了简要介绍,针对相位差变化率定位过程中相位模糊、定位时间长和定位精度低等问题,提出了一种基于MGEKF滤波算法的相位差变化率单站无源定位方法,该方法采用了相位差参数预处理和MGEKF定位滤波算法。经过仿真分析和外场试验验证表明:采用MGEKF定位滤波处理的相位差变化率无源定位方法,可以使单站定位速度和定位精度比传统的只测角定位法提高很多。

Research of Passive Location Technology Based on Phase Difference Rate of Change

Based on the study of the single station passive location technology,the principle of location based on phase difference rate of change is introduced.In view of the problem of phase fuzzy,long positioning time and low location accuracy in location based on phase difference rate of change,a single station passive location method of phase difference rate of change based on the MGEKF filtering algorithm is proposed,and the method uses the pretreatment of the phase difference rate of change and the MGEKF filtering location algorithm.The data of simulation analysis and field experiment show that,compared to the traditional locating method of only angle measuring,the passive location based on phase difference rate of change with the MGEKF filtering can greatly improve the single station locating speed and locating accuracy.