摘 要
全球导航卫星系统（GNSS）和通用分组无线服务（GPRS）技术在户外定位系统中的应用已经成为研究和应用的热点。本文旨在探讨基于GNSS与GPRS的户外定位系统的研究现状和发展趋势。首先介绍了GNSS和GPRS技术的基本原理和特点，然后分析了两者在户外定位领域的优势和互补性。接着阐述了基于GNSS与GPRS的户外定位系统的整体架构和关键技术，包括信号接收、数据传输、位置计算和用户界面设计等方面。随后，综述了相关研究中的主要问题与挑战，如信号遮挡、多路径效应、定位精度和数据安全等，并提出了相应的解决方案和改进方法。最后，展望了未来基于GNSS与GPRS的户外定位系统的发展方向，包括更加精准的定位技术、更高效的数据传输方式以及更加智能化的用户体验。总之，基于GNSS与GPRS的户外定位系统具有广阔的应用前景，将在各种领域中发挥重要作用，为人们提供更加便捷、准确和安全的定位服务。
关键词：GNSS；GPRS；户外定位系统；定位精度；数据安全
Abstract
The application of Global Navigation Satellite System (GNSS) and General Packet Radio Service (GPRS) technology in outdoor positioning systems has become a hot spot in research and application. The purpose of this thesis is to discuss the research status and development trend of outdoor positioning system based on GNSS and GPRS. Firstly, the basic principles and characteristics of GNSS and GPRS technology are introduced, and then the advantages and complementarity of the two in the field of outdoor positioning are analyzed. Then, the overall architecture and key technologies of the outdoor positioning system based on GNSS and GPRS are described, including signal reception, data transmission, position calculation and user interface design. Subsequently, the main problems and challenges in related research, such as signal occlusion, multipath effect, positioning accuracy and data security, are reviewed, and corresponding solutions and improvement methods are proposed. Finally, the future development direction of outdoor positioning system based on GNSS and GPRS is prospected, including more accurate positioning technology, more efficient data transmission mode and more intelligent user experience. In short, the outdoor positioning system based on GNSS and GPRS has broad application prospects and will play an important role in various fields to provide people with more convenient, accurate and safe positioning services.
Key words: GNSS;GPRS; Outdoor positioning system; Positioning accuracy; Data Security
目录
第1章 绪论
1.1 研究的背景和意义
1.2 国内外研究现状
1.3 研究目标
第2章 卫星定位
2.1 卫星定位技术原理
2.2 卫星定位数据采集
2.3 小结
第3章 基于GNSS与GPRS定位系统的关键技术
3.1 GPRS无线通信的技术优势
3.1.1 GPRS无线通信在监控系统中的技术优势
3.1.2 GPRS无线通信在在收费系统中的技术优势
3.2 GNSS测量误差来源
3.2.1 误差的主要类型
3.2.2 有关信号的传播误差
3.3 总结
第4章 定位系统存在的问题
4.1 网络信号优化
4.1.1 测试信号流程
4.1.2 信号优化的目的
4.2 常见问题及优化思路
4.3 优化总结
第5章 总结与展望
