基于LTE-R的高速列车定位方法研究
发布时间：2018-12-14 02:14
【摘要】：随着近年来我国铁路行业的快速发展，高速铁路已成为铁路运营部门的一张新名片动车组列车给乘客带来了出行便利和舒适环境的同时，它的高速度运行也对铁路部门的安全和高效运营提出了新的挑战 铁路部门需要实时对每一列车定位，即准确获得列车在线路上所处的位置，以保证行车安全传统铁路的列车定位方法有轨道电路法查询应答器法等，以及应用于其它轨道交通方式的交叉感应环线法和扩频无线电法等新型定位方法针对这些方法中存在的只能点式定位精度不高大量设立轨旁设备等弊端，本人提出了一种利用铁路专用移动通信网络对高速列车进行无线定位的方法该方法具有定位精度较高实现连续定位节约成本开销等优势然而无线通信的信道具有的不确定性，容易使无线信号在传送过程中受到噪声干扰多径衰落路径损耗等因素影响，这些影响将进一步导致无线信号携带的信息参数测量不准确，造成部分地区的定位精度较低因此如何合理设计定位系统的结构和流程也是本文研究的关键内容 为此，本文拟从高速铁路移动通信的发展趋势入手，对基于长期演进计划应用(LongTerm Evolution for Railway, LTE-R)的高速列车定位方法展开深入研究LTE作为公共的第四代移动通信系统，具有数据速率高移动性好服务质量优安全性好等特点，其应用于铁路的版本LTE-R由国际铁路联盟提出，它对铁路通信技术的发展起着巨大的推动作用基于LTE-R的高速列车定位方法主要思路是：利用铁路专用移动通信系统LTE-R的网络对列车实施无线定位，即由接收设备对发射设备发出的无线电波参数进行测量，并对测量值进行相关估计，进而测算出发射或者接收设备的位置 论文内容安排如下：首先介绍了现有的列车定位方式和铁路专用通信的发展，，研究了LTE物理层相关参数的协议标准，阐述了无线定位方式的分类以及使用无线方式进行列车定位的优势，同时还分析了列车的无线定位方式的选择相比于公网中的无线定位的特殊性，如铁路对列车的约束性和定位基站之间的位置关系等；接下来，论文提出了基于LTE-R的高速列车定位方法，包括影响定位方式选择的因素列车定位的原理图和工作流程，以及参数估计和位置计算；最后，论文对所提定位方法进行了计算机软件MATLAB/Simulink仿真，仿真结果对实际工程应用提供了一定的参考
[Abstract]:With the rapid development of railway industry in China in recent years, high-speed railway has become a new business card of railway operation department, the EMU train has brought convenience and comfortable environment to passengers at the same time. Its high speed operation also poses a new challenge to the safe and efficient operation of the railway department. The railway department needs to locate each train in real time, that is, to accurately obtain the position of the train on the line. In order to ensure the safety of traffic, the traditional train positioning methods include track circuit method, inquiry transponder method, etc. And new positioning methods, such as cross induction loop method and spread spectrum radio method, which are applied to other rail transit modes, aim at the shortcomings of these methods such as the low accuracy of only point positioning and the establishment of a large number of side rail equipment, etc. This paper presents a wireless location method for high-speed trains using special railway mobile communication network. This method has the advantages of high positioning precision, realizing continuous positioning, saving cost and so on. However, the channel of wireless communication is uncertain. It is easy to cause the wireless signal to be affected by noise interference, multipath fading path loss and other factors during the transmission process, which will further lead to inaccurate measurement of the information parameters carried by the wireless signal. Therefore, how to reasonably design the structure and flow of positioning system is also the key content of this paper. Therefore, this paper intends to start with the development trend of high-speed railway mobile communication. In this paper, a new method of high-speed train positioning based on long term evolution planning (LongTerm Evolution for Railway, LTE-R) is studied. As a common fourth generation mobile communication system, LTE has the characteristics of high data rate, high mobility, good quality of service, good security, and so on. The version of LTE-R used in railways was proposed by the International Union of Railways. It plays a great role in promoting the development of railway communication technology. The main idea of high-speed train location method based on LTE-R is to make use of the network of railway special mobile communication system (LTE-R) to implement wireless positioning of trains. That is, the radio wave parameters emitted by the transmitting equipment are measured by the receiving device, and the measured values are estimated. Then the location of transmitting or receiving equipment is calculated as follows: firstly, the current train positioning mode and the development of special railway communication are introduced, and the protocol standard of LTE physical layer parameters is studied. This paper expounds the classification of wireless positioning methods and the advantages of using wireless methods to locate trains. At the same time, it also analyzes the particularity of the selection of wireless positioning modes of trains compared with that of wireless positioning in public networks. Such as the constraint of railway to the train and the position relationship between the positioning base station and so on; Then, the paper puts forward the high-speed train positioning method based on LTE-R, including the train positioning principle diagram and work flow, parameter estimation and location calculation. Finally, the computer software MATLAB/Simulink simulation of the proposed positioning method is carried out, and the simulation results provide a certain reference for the practical engineering application.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
本文编号：2377721
[Abstract]:With the rapid development of railway industry in China in recent years, high-speed railway has become a new business card of railway operation department, the EMU train has brought convenience and comfortable environment to passengers at the same time. Its high speed operation also poses a new challenge to the safe and efficient operation of the railway department. The railway department needs to locate each train in real time, that is, to accurately obtain the position of the train on the line. In order to ensure the safety of traffic, the traditional train positioning methods include track circuit method, inquiry transponder method, etc. And new positioning methods, such as cross induction loop method and spread spectrum radio method, which are applied to other rail transit modes, aim at the shortcomings of these methods such as the low accuracy of only point positioning and the establishment of a large number of side rail equipment, etc. This paper presents a wireless location method for high-speed trains using special railway mobile communication network. This method has the advantages of high positioning precision, realizing continuous positioning, saving cost and so on. However, the channel of wireless communication is uncertain. It is easy to cause the wireless signal to be affected by noise interference, multipath fading path loss and other factors during the transmission process, which will further lead to inaccurate measurement of the information parameters carried by the wireless signal. Therefore, how to reasonably design the structure and flow of positioning system is also the key content of this paper. Therefore, this paper intends to start with the development trend of high-speed railway mobile communication. In this paper, a new method of high-speed train positioning based on long term evolution planning (LongTerm Evolution for Railway, LTE-R) is studied. As a common fourth generation mobile communication system, LTE has the characteristics of high data rate, high mobility, good quality of service, good security, and so on. The version of LTE-R used in railways was proposed by the International Union of Railways. It plays a great role in promoting the development of railway communication technology. The main idea of high-speed train location method based on LTE-R is to make use of the network of railway special mobile communication system (LTE-R) to implement wireless positioning of trains. That is, the radio wave parameters emitted by the transmitting equipment are measured by the receiving device, and the measured values are estimated. Then the location of transmitting or receiving equipment is calculated as follows: firstly, the current train positioning mode and the development of special railway communication are introduced, and the protocol standard of LTE physical layer parameters is studied. This paper expounds the classification of wireless positioning methods and the advantages of using wireless methods to locate trains. At the same time, it also analyzes the particularity of the selection of wireless positioning modes of trains compared with that of wireless positioning in public networks. Such as the constraint of railway to the train and the position relationship between the positioning base station and so on; Then, the paper puts forward the high-speed train positioning method based on LTE-R, including the train positioning principle diagram and work flow, parameter estimation and location calculation. Finally, the computer software MATLAB/Simulink simulation of the proposed positioning method is carried out, and the simulation results provide a certain reference for the practical engineering application.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
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