基于LTE-R的高速列車定位方法研究
發(fā)布時間：2018-12-14 02:14
【摘要】：隨著近年來我國鐵路行業(yè)的快速發(fā)展，高速鐵路已成為鐵路運營部門的一張新名片動車組列車給乘客帶來了出行便利和舒適環(huán)境的同時，它的高速度運行也對鐵路部門的安全和高效運營提出了新的挑戰(zhàn) 鐵路部門需要實時對每一列車定位，即準確獲得列車在線路上所處的位置，以保證行車安全傳統(tǒng)鐵路的列車定位方法有軌道電路法查詢應答器法等，以及應用于其它軌道交通方式的交叉感應環(huán)線法和擴頻無線電法等新型定位方法針對這些方法中存在的只能點式定位精度不高大量設立軌旁設備等弊端，本人提出了一種利用鐵路專用移動通信網(wǎng)絡對高速列車進行無線定位的方法該方法具有定位精度較高實現(xiàn)連續(xù)定位節(jié)約成本開銷等優(yōu)勢然而無線通信的信道具有的不確定性，容易使無線信號在傳送過程中受到噪聲干擾多徑衰落路徑損耗等因素影響，這些影響將進一步導致無線信號攜帶的信息參數(shù)測量不準確，造成部分地區(qū)的定位精度較低因此如何合理設計定位系統(tǒng)的結(jié)構(gòu)和流程也是本文研究的關(guān)鍵內(nèi)容 為此，本文擬從高速鐵路移動通信的發(fā)展趨勢入手，對基于長期演進計劃應用(LongTerm Evolution for Railway, LTE-R)的高速列車定位方法展開深入研究LTE作為公共的第四代移動通信系統(tǒng)，具有數(shù)據(jù)速率高移動性好服務質(zhì)量優(yōu)安全性好等特點，其應用于鐵路的版本LTE-R由國際鐵路聯(lián)盟提出，它對鐵路通信技術(shù)的發(fā)展起著巨大的推動作用基于LTE-R的高速列車定位方法主要思路是：利用鐵路專用移動通信系統(tǒng)LTE-R的網(wǎng)絡對列車實施無線定位，即由接收設備對發(fā)射設備發(fā)出的無線電波參數(shù)進行測量，并對測量值進行相關(guān)估計，進而測算出發(fā)射或者接收設備的位置 論文內(nèi)容安排如下：首先介紹了現(xiàn)有的列車定位方式和鐵路專用通信的發(fā)展，，研究了LTE物理層相關(guān)參數(shù)的協(xié)議標準，闡述了無線定位方式的分類以及使用無線方式進行列車定位的優(yōu)勢，同時還分析了列車的無線定位方式的選擇相比于公網(wǎng)中的無線定位的特殊性，如鐵路對列車的約束性和定位基站之間的位置關(guān)系等；接下來，論文提出了基于LTE-R的高速列車定位方法，包括影響定位方式選擇的因素列車定位的原理圖和工作流程，以及參數(shù)估計和位置計算；最后，論文對所提定位方法進行了計算機軟件MATLAB/Simulink仿真，仿真結(jié)果對實際工程應用提供了一定的參考
[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.
【學位授予單位】：蘭州交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5
本文編號：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.
【學位授予單位】：蘭州交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5
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本文編號：2377721
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