GSM-R加权最小二乘干扰源定位方法及性能分析  

Locating Method and Performance Analysis of GSM-R Interference Source Based on Weighted Least Squares

作　　者：熊洁[1] 何平川[1] 石玉 XIONG Jie;HE Pingchuan;SHI Yu(China Railway EPyuan Engineering Group Co.,Ltd.,Chengdu 610031,China;Chengdu Xingren Science and Technology Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]成都兴仁科技有限公司,成都610041

出　　处：《高速铁路技术》2018年第3期23-27,共5页High Speed Railway Technology

摘　　要：针对铁路GSM-R移动通讯系统中干扰源测向定位精度不高导致排查确认工作效率较低的问题,提出了一种基于多次观测量的加权最小二乘测向定位方法,无需增加观测站数量即可有效提高干扰源的定位精度。文章推导了测向定位方程组的迭代求解方法,分析了测角精度的理论下界,进而得到了各次观测量的加权值,并基于加权最小二乘的原理对干扰源位置进行融合估计,最后通过Monte-Carlo仿真验证了该方法对GSM-R干扰源测向定位的有效性。Aiming at the problem that the low positioning accuracy of interference source in railway GSM-R mobile communication system results in low efficiency of checking and confirmation,the method of weighted least-squares direction finding based on multiple observations is proposed. Without additional observation stations,the method can effectively improve the positioning accuracy of interference sources. In this paper,the iterative method to solve the equations of finding and locating direction is derived,the theoretical lower bound of the angle measurement accuracy is analyzed,and then the weighted values of each observation is obtained,fusion estimation of the location of interference sources is based on the principle of weighted least squares. Finally,the effectiveness of the proposed method for the finding and location of the GSM-R interference sources is verified by Monte-Carlo simulation.

关 键 词：GSM-R 干扰源 定位 加权最小二乘 

分 类 号：U285.41[交通运输工程—交通信息工程及控制]