本文選題：軌道交通 + 電波傳播建模　； 參考：《北京交通大學(xué)》2014年博士論文

【摘要】：作為全球公認(rèn)的低能耗、少污染的“綠色交通”,軌道交通被世界各國(guó)普遍認(rèn)為是改善國(guó)家和城市公共交通狀況、解決交通問(wèn)題的重要出路。從區(qū)域間的軌道交通來(lái)看,今天的中國(guó)已經(jīng)成為了世界高速鐵路建設(shè)里程最長(zhǎng)的國(guó)家。近年來(lái),中國(guó)開(kāi)啟了“高鐵外交”的進(jìn)程,將高速鐵路的發(fā)展提升到了國(guó)家戰(zhàn)略的高度。從區(qū)域內(nèi)的城市軌道交通(地鐵和輕軌)來(lái)看,國(guó)家將城市軌道交通作為城市基礎(chǔ)設(shè)施建設(shè)領(lǐng)域的投資重點(diǎn),使之成為實(shí)施國(guó)家戰(zhàn)略和改善大城市交通問(wèn)題的重要舉措。 在軌道交通場(chǎng)景中的移動(dòng)通信系統(tǒng)可以分為兩類,一類是面向列車(chē)控制與安全的專用移動(dòng)通信系統(tǒng),一類是面向旅客信息服務(wù)的公共移動(dòng)通信系統(tǒng)。軌道交通場(chǎng)景的特殊結(jié)構(gòu)對(duì)這兩類移動(dòng)通信系統(tǒng)在沿線的設(shè)計(jì)和網(wǎng)絡(luò)規(guī)劃帶來(lái)了重重挑戰(zhàn)。所以,作為移動(dòng)通信系統(tǒng)設(shè)計(jì)、規(guī)劃以及部署的重要基礎(chǔ),軌道交通場(chǎng)景的電波傳播預(yù)測(cè)建模一直是工程電磁場(chǎng)理論的研究重點(diǎn)之一。盡管經(jīng)過(guò)大量學(xué)者的努力,在過(guò)去數(shù)十年間人們對(duì)軌道交通電波傳播領(lǐng)域的認(rèn)識(shí)有了長(zhǎng)足進(jìn)步,但是現(xiàn)有研究仍然存在下述局限： 1)從建模理論和方法上看,目前常用的電波傳播經(jīng)驗(yàn)性模型和半確定性模型并不能反映軌道交通場(chǎng)景的主要特點(diǎn)。確定性模型只用于對(duì)信道的定性解釋,無(wú)法有效服務(wù)于網(wǎng)絡(luò)規(guī)劃。 2)從所研究的空間上看,現(xiàn)有研究尚缺乏模型將現(xiàn)實(shí)中廣泛存在的橫跨橋、車(chē)站等半封閉空間有效地納入到通信系統(tǒng)的網(wǎng)絡(luò)規(guī)劃和系統(tǒng)設(shè)計(jì)中,這對(duì)應(yīng)用于軌道交通場(chǎng)景的通信系統(tǒng)的可靠性造成了影響。 3)從對(duì)傳播機(jī)制的認(rèn)識(shí)上說(shuō),既有研究對(duì)隧道中的電波傳播機(jī)制以及各機(jī)制所在的區(qū)域、各區(qū)域之間的分界點(diǎn)的認(rèn)識(shí)不夠清晰統(tǒng)一,缺乏能夠涵蓋隧道中電波傳播全過(guò)程的完整模型。 針對(duì)上述問(wèn)題,本文對(duì)軌道交通場(chǎng)景的電波傳播建模理論和方法進(jìn)行綜合性的研究。從磁波能量約束的角度,本文將軌道交通的電波傳播空間分為開(kāi)放空間、半封閉空間和限定空間三大類以分別進(jìn)行研究。主要工作如下： 1)針對(duì)開(kāi)放空間,研究了面向真實(shí)軌道交通戶外場(chǎng)景的電波傳播確定性建模理論和方法。為各類通信系統(tǒng)在軌道交通場(chǎng)景的設(shè)計(jì)提供了高準(zhǔn)確性的電波傳播預(yù)測(cè)模型。此外,研究了適用于軌道交通典型場(chǎng)景——路塹和高架橋場(chǎng)景的包含了經(jīng)驗(yàn)性建模的電波傳播半確定性建模理論與方法。為軌道交通的快速網(wǎng)絡(luò)規(guī)劃提供了基于完全開(kāi)源的數(shù)據(jù)庫(kù)、計(jì)算快捷的有效方法。 2)針對(duì)半封閉空間,對(duì)軌道交通場(chǎng)景中典型的半封閉空間—橫跨橋和車(chē)站對(duì)電波傳播的影響進(jìn)行了測(cè)量,并在此基礎(chǔ)上進(jìn)行了經(jīng)驗(yàn)性建模。通過(guò)實(shí)測(cè)證明了該模型可以有效地將這兩類半封閉空間納入到電波傳播的預(yù)測(cè)中去。 3)針對(duì)限定空間,提出了隧道中電波傳播的完整模型架構(gòu),對(duì)“基于分段”的建模思想進(jìn)行了整合和拓展,有助于形成對(duì)隧道中電波傳播過(guò)程的整體性認(rèn)識(shí)。相應(yīng)地,所提出的混合模型為不同類型的用戶在各種隧道中的通信系統(tǒng)網(wǎng)絡(luò)規(guī)劃提供了快速而準(zhǔn)確的電波傳播預(yù)測(cè)工具。 4)針對(duì)無(wú)線電波在隧道中傳播的最初階段,本文對(duì)自由空間傳播機(jī)制和多模態(tài)傳播機(jī)制之間的分界點(diǎn)位置進(jìn)行了準(zhǔn)確的解析建模。提出了任意橫截面隧道中該分界點(diǎn)位置的普適模型,明確了隧道中近場(chǎng)區(qū)的電波傳播機(jī)制。 綜上所述,本文對(duì)軌道交通場(chǎng)景的電波傳播建模理論及方法進(jìn)行了研究：在應(yīng)用層面為通信系統(tǒng)在軌道交通場(chǎng)景中的設(shè)計(jì)提供了電波傳播預(yù)測(cè)工具；在方法論層面為不同場(chǎng)景中的電波傳播建模提供了可移植和轉(zhuǎn)化的方法：在認(rèn)識(shí)論層面為不同空間的電波傳播研究提供了值得借鑒的理論策略。
[Abstract]:As a globally recognized low energy consumption, less pollution of the "green transportation", rail transportation is generally considered by the world to be improved national and city public transport, an important way to solve the traffic problems. From the regional rail transit, the China today has become the world's longest high-speed railway construction in the country. To Chinese opened high-speed rail diplomacy process, the development of high-speed railway to enhance the national strategic height. From the city rail transit area (subway and rail), the state will city rail transportation as the city infrastructure investment focus, has become an important measure to implement the national strategy and to improve the traffic problem in big city.
The mobile communication system in rail traffic scenes can be divided into two categories, one is the special mobile communication system for train control and safety, is a public mobile communication system for passenger information service. The special structure of rail traffic scene of the two kind of mobile communication system has brought many challenges in the design of the network planning and design. So, as a mobile communication system, an important basis for planning and deployment, propagation prediction modeling of rail traffic scene has been one of the key research project of electromagnetic field theory. Although scholars through a lot of efforts in the past few decades, people's awareness of the rail traffic propagation field has made great progress, but the existing research still has the following limitations:
1) from the modeling theory and method, the commonly used radio propagation empirical models and semi deterministic models can not reflect the main characteristics of rail traffic scenarios. Deterministic models are only used for qualitative interpretation of the channel, and can not effectively serve the network planning.
2) from the perspective of space, the existing research lacks a model across the bridge exists widely in reality, the semi closed space effectively into the design of network planning system and communication system, the reliability of communication system used in rail traffic scenes made into effect.
3) from the understanding of the communication mechanism, we have not yet studied the mechanism of radio propagation in the tunnel, and the understanding of the boundaries between the regions, and the complete models of the whole process of radio wave propagation in tunnels.
Aiming at the above problems, the radio propagation modeling theory and method of track traffic scene of comprehensive research. From the magnetic wave energy constraints, the propagation space of rail transportation is divided into open space, semi closed space and limited space in three categories were studied. The main work is as follows:
1) according to the open space, on the propagation of deterministic modeling theory and method for real traffic scenes. Outdoor radio propagation provides high accuracy forecasting model for the design of rail traffic scene in all kinds of communication systems. In addition, the research for typical scenes and Viaduct Rail Transit -- cutting scene contains the empirical modeling the radio wave propagation theory and method of semi deterministic modeling for rapid rail transit network planning provides a complete open-source database based on the effective method of quick calculation.
2) in a semi closed space, across the bridge and the station of semi closed space - typical rail traffic scenes on the propagation of electromagnetic wave was measured, and based on the empirical modeling. Through the test show that the model can effectively integrate the two semi closed space into the prediction of radio wave propagation in the.
3) in limited space, propose a complete model of wave propagation in tunnel, the "modeling section" based on the integration and development, contribute to the overall understanding of the formation of wave propagation in tunnels. Accordingly, in various tunnel communication system network planning for the proposed hybrid model different types of users with a fast and accurate propagation prediction tools.
4) in the initial stage of radio wave propagation in tunnels, the demarcation point between the position of the free space propagation mechanism and multimodal communication mechanism are proposed. The accurate analytical modeling of the critical point position of arbitrary cross section tunnel in the universal model, the tunnel near field wave propagation mechanism.
In summary, radio propagation modeling theory and method based on rail traffic scene are analyzed: at the application level for the design of rail transportation in the scene communication system provides radio propagation prediction tools; at the level of methodology for modeling wave propagation in different scenarios for transplant and transformation method: in the study of wave propagation the epistemological level for different space provides a theoretical strategy worthy of reference.

【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5
，

本文編號(hào)：1760843