基于北斗信息的手机终端的应用研究

发布时间：2018-05-23 11:52

本文选题：北斗信息 + 手机终端　；参考：《江西理工大学》2014年硕士论文

【摘要】：随着卫星导航系统的迅速发展，卫星导航终端已经深入我们生活的各个角落，北斗卫星导航定位系统集导航定位、授时用户监测、短报文通信于一体。随着北斗应用领域的不断拓展，人们对北斗信息的终端技术要求也越来越高。中国导航定位终端的应用市场潜力十分巨大，中国自主研发的北斗卫星导航系统，摆脱了对国外卫星系统的依赖，同时打破了美国GPS技术的垄断。因此，北斗信息的手机终端的应用研究具有深远意义。本文首先提出了北斗信息系统的研究背景和意义，对国内外卫星定位及导航现状做了分析，并阐述了北斗信息系统的定位原理和关键技术。给出了北斗信息的手机终端技术及设计方法。该终端主要由射频单元、基带单元和显控单元三部分组成，终端可实现北斗二代系统的持续实时导航、定位和测速等功能。北斗信息系统中的基带单元和显控单元以蓝牙通信的方式来实现，实现基带单元与显控单元之间的无线互接。射频单元采用三频天线，，完成对北斗无线电导航卫星服务（RNSS）信号的接收和无线电测定卫星服务（RDSS）信号的收发，在数字信号处理器(DSP)的控制下，基带单元采用Bm3005芯片完成对RDSS信号的处理，采用BP2007芯片完成对RNSS信号的处理。基带单元带有蓝牙和RS232接口，通过蓝牙传输数据给指定的显控单元，通过RS232接口可与计算机互相传送数据。显控单元选用S5PV210应用处理器为核心的硬件平台，S5PV210处理器主频高达1GHz，满足终端系统丰富接口和高性能的运算能力需求。其次本文给出了北斗信息的手机终端的软件设计。它包括基带软件部分和终端显控软件部分。基带软件部分采用基于嵌入式平台的uC/OS-II嵌入式实时操作系统。基带软件部分有捕获，授时，采样，导航电文解析和定位解算功能。基带软件部分在处理完导航数据之后，终端显控软件部分接收通过蓝牙传输的有效数据。基于Android终端显控软件有蓝牙功能，在蓝牙驱动下，终端显控单元与北斗信息基带单元的蓝牙设备之间配对连接成功后，相互传递有效数据。在蓝牙通信的过程中，调用蓝牙API功能函数来完成基带软件部分和终端显控软件部分的通信连接。蓝牙手机来显示和处理数据流。针对上述设计，本文给出了基带软件处理后数据有效性测试，介绍了终端显控软件界面设计，并对终端显控软件测试。实现了在户外当没有手机信号时，人们可以实现准确的导航定位和相互间发送短报文。相比于传统的卫星导航终端，该终端具有良好的可操作性和实用性，便于携带和高性价比将使它在未来民用市场获得较好的经济和社会效益。
[Abstract]:With the rapid development of satellite navigation system, satellite navigation terminal has penetrated into every corner of our life. Beidou satellite navigation and positioning system integrates navigation and positioning, timing user monitoring, short message communication. With the development of Beidou application field, the terminal technology requirement of Beidou information is more and more high. The application market potential of navigation and positioning terminal in China is very great. Beidou satellite navigation system developed by China has got rid of the dependence on foreign satellite system and broken the monopoly of American GPS technology at the same time. Therefore, the application research of Beidou information mobile terminal has profound significance. In this paper, the research background and significance of Beidou information system are put forward, and the present situation of satellite positioning and navigation at home and abroad is analyzed, and the positioning principle and key technology of Beidou information system are expounded. The mobile terminal technology and design method of Beidou information are given. The terminal consists of radio frequency unit, baseband unit and display and control unit. The terminal can realize the continuous real-time navigation, positioning and speed measurement of Beidou second generation system. The baseband unit and display control unit in Beidou information system are realized by Bluetooth communication, and the wireless connection between baseband unit and display control unit is realized. The radio frequency unit uses a three-frequency antenna to complete the reception of the Beidou radio navigation satellite service (RNSS) signal and the transceiver of the radio determination satellite service RDSS signal under the control of the digital signal processor (DSP). The baseband unit uses Bm3005 chip to complete the processing of RDSS signal and BP2007 chip to complete the processing of RNSS signal. The baseband unit has Bluetooth and RS232 interfaces, and transmits data to the designated display and control unit through Bluetooth. The data can be transmitted to the computer through the RS232 interface. The main frequency of the S5PV210 processor is as high as 1 GHz, which is a hardware platform with S5PV210 application processor as the core of the display and control unit, which can meet the requirements of rich interface and high performance of the terminal system. Secondly, this paper gives the software design of the mobile terminal of Beidou information. It includes base band software and terminal display control software. The baseband software part adopts uC/OS-II embedded real-time operating system based on embedded platform. Baseband software has capture, timing, sampling, navigation message analysis and positioning solution functions. After processing the navigation data, the terminal display control software part receives the effective data transmitted by Bluetooth. Based on Android terminal display control software has Bluetooth function, under the Bluetooth drive, the terminal display control unit and the Beidou information baseband unit Bluetooth equipment after the match connection successfully, transfers the effective data mutually. In the process of Bluetooth communication, the Bluetooth API function is called to complete the communication connection between the baseband software and the terminal display control software. Bluetooth phone to display and process data streams. In view of the above design, this paper presents the data validity test after baseband software processing, introduces the interface design of terminal display and control software, and tests the terminal display control software. When there is no cell phone signal in the outdoor, people can realize accurate navigation and location and send short message between each other. Compared with the traditional satellite navigation terminal, the terminal has good maneuverability and practicability, and it will gain better economic and social benefits in the civil market in the future because of its portability and high performance-to-price ratio.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN96.1;TN929.53

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