毕业设计 LTE系统在高速公路监控系统中的应用研究.doc

摘 要 随着我国经济的高速发展，我国公路交通事业也已经有了长足的进步，高速公路总里程也已名列世界前列，但是伴随着高速公路建设的快速发展，高速公路通信网作为交通信息网重要组成部分，其用户的可用带宽在逐步增加，对业务的要求也逐步向宽带化、实时化发展。用户对交通通信网提出了更多的需求。而当前无线移动通信技术的快速发展，为高速公路通信系统的发展与建设提供了一个很好的平台。 本文详细阐述了LTE无线网络的系统结构和技术组成，重点对OFDM和MIMO等核心技术进行了详细的原理、实现方式等方面的论述，LTE无线系统为我们提供了一个传输速率高、网络延迟小、传输安全的无线网络平台，在文中，我们对LTE系统进行了初步的链路级仿真，直观的对LTE 系统各项技术进行了比较。 本文从现有的高速公路通信网出发，详细论述了高速公路通信系统设计原则和系统规划，重点对高速公路监控系统的设计和规划进行了分析，在此基础上，提出了基于LTE无线网络的高速公路监控系统设计方案，LTE无线数据通信系统是集成了计算机技术、LTE无线网络平台和数据通信技术于一体的综合技术，通过LTE无线终端，借助LTE无线网络将数据传输到数据业务中心，实现对各用户设备终端的双向数据通信， 监控系统的前端采集设备结合无线数据终端设备即构成了无线采集系统，摄像头、车辆检测器、情报板等采集设备可通过各种接口连接无线数据终端，通过移动网络，与监控中心建立连接通道。 关键词：LTE，OFDM，MIMO，高速公路监控 ABSTRACT With Chinese rapid economic development, Chinese road transport industry has made great strides, highway mileage has also been ranked in the world, but along with the rapid development of highway construction, highway traffic information communication network as an important network part of the users available bandwidth is gradually increased, the requirements of the business gradually to broadband, real-time development. The current transportation and communication networks can no longer satisfy the needs of users. The current wireless mobile communication technology, rapid development, highway development and construction of communications systems provide a good platform. This paper describes the LTE wireless network system architecture and technology components, with emphasis on OFDM and MIMO technologies in detail the core principles, implementation and other aspects of the discussion, LTE wireless system provides us with a high transfer rate, network delay small transmission secure wireless network platform in the text, we conducted a preliminary LTE system link-level simulation, the visual technology of LTE systems are compared. This thesis based on existing highway communications network, discusses in detail the principles of highway communication system design and system planning, focusing on highway design and planning of