论文标题:抗毁性TDMA移动通信系统移动站终端技术研究
Research on the Terminal Technologies of Mobile Station in anti-destruction TDMA Mobile Communication System
论文作者 张艳玲
论文导师 邬国扬;孙献璞,论文学位 硕士,论文专业 通信与信息系统
论文单位 西安电子科技大学,点击次数 78,论文页数 56页File Size3540k
2001-01-01论文网 http://www.lw23.com/lunwen_430417102/ 时分多址（ＴＤＭＡ）,终端,移动站,综合业务,语音编解码
TDMA,Terminal,Mobile,station,Multi-service,Voice coding and decoding
本文在TDMA／TDD综合业务数字移动通信系统研究工作的背景下，提出了一种具有综合业务接入能力和较强抗毁性能的系统设计方案，并解决了时分多址／时分双工移动站的关键技术。TDMA／TDD终端系统由时分终端和业务终端组成，其中业务终端包括数据终端、话音终端和图像终端。在系统设计中，为了提高系统的抗毁性能，采用了移动站和中心站具有完全相同的硬件结构的设计思想，移动站和中心站的区别主要体现在时分终端软件的设计上；这样，当中心站被毁或出现故障时，任何一个移动站均可升级为中心站，保证整个系统仍能正常工作，从而提高了系统整体的抗毁性能。为了提高系统的管理能力和可扩展性能，在设计中采用PC-104机作为控制器，并利用大规模集成电路器件CPLD进行逻辑设计，完成了时分终端的设计，实现了中心站与移动站之间的数据与话音业务传输、信道资源的动态管理以及移动站的专有设计；在话音终端的设计中，我们采用了声码器AMBE-1000，使得该话音终端在很低传输速率下仍然具有很好的话音质量。最后对系统性能进行了分析、测试和总结，说明所设计和制作的终端设备已达到预期目标。 本文所完成的TDMA／TDD移动通信系统的显著特点是：实现了多种业务接入的通信能力，具有较强的抗毁性能；同时还具有体积小、重量轻和耗电少等优点。
In this paper, a new design of integrated service and anti-destruction terminal has been realized and the critical techniques in mobile station and multi-service access have been proposed based on the research of terminals in TDMA/TDD digital integrated service mobile communication system. The design of mobile station has been composed of time-division multi access terminal and service terminals, and the terminals include data terminal, voice terminal and image terminal. For the purpose of enhancing the performance of anti-destruction, the system was designed in the idea that the mobile and the base have absolutely same hardware, and can be distinguished by software. Thus, if the base was destroyed, each of the mobiles can act as base station, which ensures the system still can work normally. The mainly design of time-division multi access terminal and its multi services access is mainly focused on in this paper. In the design of the time-division terminal, Pc- 104 was adopted as the processor and CPLD devices was used as logic unit, that can enhance the system manage ability and extendable performance. At the same time, the time-division terminal achieves the function of managing channels dynamically according the type of services. The AMBE-l000 Vocoder chip is used to design the voice terminal, so the terminal has the advantages of low bit rate and high voice quality. The system analysis and test prove that the design achieves expected system requirement and the function of the system has been well performed. The remarkable characteristic of the TDMA/TDD mobile communication system designed in this paper is: multi-service access and anti-destruction were achieved, and the system was designed as small in size, light in weight and low in power supply.
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