Research And Development On A AGPS Based Vehicle Navigation System

The popularity of household vehicles do have facilitated people's daily travels but at the same time have involved many traffic issues such as increasingly complex road network, serious traffic congestion and so on. These issues always make drivers puzzled on route selection, largely lower the traffic efficiency. People usually are not able to arrive at destination on schedule and sometimes even slower than walking. For these problems, Intelligent Vehicle Navigation System(VNS) is indeed a good solution for which it has drawn many nations' attention and now become a hot research in the field of Intelligent Transportation System(ITS).VNS is a novel system that combines technologies of Global Positioning, Geographic Information, Multi-media and Modern Communication. It can provide drivers an appropriate way from one position to another timely and efficiently. Positioning module in VNS is firstly used to get the current position of the car in terms of longitude and latitude, then according to the road network architecture stored in map database and real time road conditions, it finally works out a best path from current point to destination. VNS aims to use several modern high technologies such as digital communication, vehicle positioning, computer network etc to improve traffic condition, make full use of transport resources to solve kinds of traffic problems.This topic relies on a lab Cross-cutting project called "Hybrid Vehicle Navigation System". It mainly focus on research of the system software including software architecture design, part of the code implementation, map data analysis, data structure design, data processing, research on critical navigation algorithms such as map matching algorithm, optimal path algorithm and so on.. In this thesis, we first introduce the research background, significance, development status of VNS and then detail it by describing its system architecture, module division, module function etc. Afterwards, a novel AGPS based hybrid positioning technology developed by us is illustrated. On this basis, we finish the whole system's software architecture design, implement the user interface code, complete the map data processing, data structure design and then do research and development on the related algorithms such as the map matching algorithm, optimal path algorithm etc. Finally, we give a summary to all contents of this thesis and the related future work for this project is also prospected.