Odometer-aided Jamming Detection Method for Satellite-based Train Positioning

被引：0
|
作者：
Liu J. [1 ,3 ]
Cai B. [2 ,3 ]
Wang J. [1 ,3 ]
Li J. [1 ]
机构：
[1] School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing
[2] School of Computer Science and Technology, Beijing Jiaotong University, Beijing
[3] Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation, Beijing
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2020年 / 42卷 / 10期
关键词：
Jamming detection; Odometer; Satellite navigation; Train operation control; Train positioning;
D O I：
10.3969/j.issn.1001-8360.2020.10.011
中图分类号：
学科分类号：
摘要：
Satellite navigation-based train speed measurement and train positioning is a major technical feature in the next generation train control system in China. In conventional research, much attention has been paid to the availability and functional safety of satellite-based positioning. However, external signal interference to the satellite navigation system may lead to great threats to the speed measurement and positioning performance under complicated railway operation environments. Effective detection of satellite positioning interference and isolation of the negative effects from signal jamming can guarantee the performance of train speed measurement and positioning. Based on the principle of jamming to satellite positioning, an odometer-aided jamming detection and protection method was proposed in this paper, where the speed measurement from the odometer and the trackmap database were utilized to generate the referencing satellite measurements. Through significant deviation detection and residual-based statistical test, degraded satellite measurements can be identified and excluded in the final speed and position determination. A jamming-injected test environment was built with the field data from the Qinghai-Tibet Railway. Results from typical amplitude modulation and coherent continuous wave jamming scenarios illustrate that the proposed method is capable of detecting, identifying and excluding degraded satellite measurements. Compared with the detection-free case, the standard deviations of the position error can be reduced by up to 41.90% and 82.86% respectively. The method shows great value in enhancing the interference protection capability and trustworthiness of satellite-based train positioning. © 2020, Department of Journal of the China Railway Society. All right reserved.
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页码：76 / 86
页数：10
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