卫星移动通信控制信道的软件实现

发布时间：2019-05-29 05:34

【摘要】：卫星移动通信是指以卫星作为信号中转媒介的移动通信方法。相比于地面蜂窝移动通信,其具有覆盖范围广、不受地理环境和通信距离限制等诸多优势。此外在特殊时期(台风、地震等),地面蜂窝移动通信设备容易受到影响从而难以保证通信,而卫星移动通信则弥补了这个缺点。要实现完整的卫星通信链路,地面上必须要有可靠的卫星移动通信信关站接收卫星信号。在卫星通信设备研发过程中,经常需要稳定的模拟信关站系统进行测试,以确保终端设备或星上设备的功能完整性和可靠性。传统的模拟信关站一般都是基于硬件平台(如FPGA、DSP等),然而硬件平台的维护成本和扩展成本都较高,而且不便于平台移植。本文的主要工作就是基于GMR-1卫星通信协议,研发了一款基于软件无线电的物理层模拟信关站系统。该课题详细设计了物理层软件实现架构,采用Python+C的编程模式和多线程的实现技术来保证软件的运行效率。整个系统具有良好的可扩展性、可维护性和可移植性。此外我们还为模拟信关站系统研发了一套可视化的用户操作界面,大大提高了测试效率。该界面前台使用CSS做渲染,使用Jinja做显示控制,使用JavaScript实现实时状态的显示,前台与后台的通信主要通过Http协议实现。
[Abstract]:Satellite mobile communication refers to the mobile communication method in which the satellite is used as the signal transit medium. Compared with terrestrial cellular mobile communication, it has many advantages, such as wide coverage, not limited by geographical environment and communication distance. In addition, in special periods (typhoons, earthquakes, etc.), ground cellular mobile communication equipment is vulnerable to be affected, so it is difficult to ensure communication, and satellite mobile communication makes up for this disadvantage. In order to realize the complete satellite communication link, there must be a reliable satellite mobile communication station to receive the satellite signal on the ground. In the process of satellite communication equipment research and development, stable analog gateway station system is often needed to ensure the functional integrity and reliability of terminal equipment or on-board equipment. Traditional analog gateway stations are generally based on hardware platform (such as FPGA,DSP, etc.). However, the maintenance cost and expansion cost of hardware platform are high, and it is not convenient for platform transplantation. The main work of this paper is to develop a physical layer analog gateway station system based on software radio based on GMR-1 satellite communication protocol. In this paper, the physical layer software implementation architecture is designed in detail, and the programming mode of Python C and multi-thread implementation technology are used to ensure the running efficiency of the software. The whole system has good scalability, maintainability and portability. In addition, we also developed a set of visual user interface for the analog gateway system, which greatly improved the test efficiency. The front desk of the interface uses CSS for rendering, Jinja for display control, JavaScript for real-time state display, and the communication between foreground and background is mainly realized through Http protocol.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN927.23

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