Research on Network RTK Train Positioning Method Based on GPS/BDS Combination

被引：0
|
作者：
Wang J. [1 ,2 ,3 ]
Sun K. [1 ]
Jiang W. [1 ,2 ,3 ]
Cai B. [1 ,3 ]
机构：
[1] School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing
[2] State Key Laboratory of Rail Traffic Control and Safety, 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 | 2023年 / 45卷 / 02期
关键词：
double constellation combination; network RTK; precision ephemeris; train positioning; VRS;
D O I：
10.3969/j.issn.1001-8360.2023.02.008
中图分类号：
学科分类号：
摘要：
In the low density train operation control system, satellite positioning has become an important support for railway train location service in order to simplify the trackside equipment as much as possible and reduce the maintenance cost. Real Time Kinematic is the main method used in satellite positioning system to improve positioning accuracy and reduce terminal cost. Combined with the one-dimensional property of railway line and the characteristics of long distance and high speed operation, the virtual reference station technology based on the conventional RTK was adopted in this paper to expand the range of system positioning service and improve the reliability of the system. By unifying the time and coordinate system of GPS and BDS, selecting the height angle combined with the SNR stochastic model, and u-sing the extended Kalman filter and the integer ambiguity fast fixing, the reliable positioning results of RTK for VRS-based double constellation network were finally provided. This paper also comprehensively evaluated the effects of different types of precision ephemeris products replacing broadcast ephemeris on the positioning accuracy in the post-processing mode. © 2023 Science Press. All rights reserved.
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页码：75 / 83
页数：8
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