《基于GPS公交站台自动报站系统的研究》-毕业论文.doc

淮阴师范学院毕业论文 PAGE PAGE 3 毕 业 论 文 学生姓名 学 号 170602020 院 (系) 物理与电子电气工程学院 专 业 电子信息科学与技术 题 目 基于GPS公交站台自动报站系统的研究 指导教师 助教/硕士 2010 年 5 月 摘 要：车载卫星定位系统，又称自动车辆定位系统，对它的研究起始于二十世纪七十年代。最初的应用是为了解决汽车文明带来的日益严重的城市交通问题。时至今日，车载卫星定位系统集合全球卫星定位技术，现代移动通信一技术，地理信息系统技术于一身，不仅在智能交通系统中担负主要作用，同时还可以提供防盗防抢劫报警，紧急医疗求助等多种服务。但是，由于目前车载卫星定位系统的无线传输大多采用GSM短消息通信技术，试验表明通过GSM短消息承载的数据通信业务，实际应用的传输时延不小于6秒，这对于实时性要求较高的需求，难以提供令人满意的应用。因此，采用GPRS技术来替代GSM无线数据传输部分，通过GPRS高达171.2kbps的通信速率，实现低于秒级的实时定位数据传输，成为车载卫星定位系统的发展方向。本文通过对GPS卫星定位理论，卫星数据处理的深入研究，提出一套基于GPRS无线通信技术的车载GPS卫星定位系统的设计方案。 关 键 词:GPS卫星定位，GPRS无线通信。 Abstract：Global Positioning System of vehicles，also known as auto vehicles locating system is researched starting of in 1960s.The propose of study is to find a solution for the heavy trafic issues in big cities that cause by the civilization of automobiles.Nowadays，auto vehicles locating is compose of Global Positioning System，wireless communication and Global geographical System. It is not only the essential part of intelligent transportation system，but also providing grand against theft，grand against highjack，medical emergence and so forth.However，the communication part of auto vehicles locating is based on GSM-SMS which can not offer real-time applications.The bearing of GPS of automobiles development is using GPRS technology that has high speed of 171.2 kbps to change the GSM part .After that the Global Positioning System of vehicles will of erreal-time application. Key Words:Global Positioning System of vehicles，GPRS communication system. 目 录 1 绪论················································································3 2 第二章GPS系统的定位原理与基础·······································4 2.1 GPS概述····································································4 2.2 GPS组成····································································5 2.3 全球卫星定位的基本原理··············································7 2.4 GPS数据丢失的补偿方案··············································11 2.5 小结···················