【作者】 曾丽君；

【导师】 黄大庆；

【作者基本信息】 南京航空航天大学 ， 通信与信息系统， 2007， 硕士

【摘要】 遥控遥测系统正朝着通用化、标准化的方向发展。传统的由硬件组成、根据某种特定用途而设计、无法有效共享互通的遥控遥测系统已经难以适应发展需求。而近年来迅速发展的软件无线电技术能很好地解决这个问题。软件无线电的特点是系统的功能可以用软件来定义,从而在不改变硬件结构的情况下通过更换软件来变更系统的功能。本课题提出了将软件无线电应用到遥控遥测系统中的技术方案。实现了遥控遥测的基带系统的软件无线电技术应用,并在基于FPGA的通用硬件平台上实现了遥控遥测基带系统关键模块的详细设计。首先,深入研究了软件无线电理论基础、系统结构以及遥控遥测系统的组成及理论基础,提出了一种易于采用软件无线电技术的QPSK的调制解调方案。其次,本文采用了Matlab/Simulink来进行整个系统的建模及可行性分析。最后,本文在基于FPGA的通用平台上,具体实现了遥控遥测基带系统的各个组成部分。通过Verilog HDL语言编写了可综合代码,并在集成开发环境ISE下,通过ModelSim进行波形仿真从而检验了设计结果。这些实现的关键模块包括遥控遥测基带系统中发射部分的差错控制编码、成形滤波、内插滤波;接收部分的同步、维特比译码等。更多还原

【Abstract】 Remote Control and Telemetry system is developing toward standardization and generalization. Traditionally, the system was constructed all by the hardware, which was designed for the specifical function and can not share the resource.This kind of system can hardly meet the requirements of development. The software radio which booms recently can resolve this problem favourably. The characters of software radio lies in that the functions of the system can be defined by the software independently. You can change the functions of the system only by modifying the software, without changing the structure of the hardware at all.This paper puts forward the scheme of applying software radio in the system of Remote Control and Telemetry. The application in base-band of this system which based on the universal platform of FPGA had been realised. Firstly, deep research of the basic theory about software radio and the Remote Control and Telemetry system had been done. Based on this, a sheme about the realization of the QPSK modem was placed. Secondly, the whole system feasibility was modeled and simulated by MATLAB/Simulink. In the end, based on the universal platform of FPGA and the language of Verilog HDL, the key modules were built. This paper realized the key modules of the base-band of the Telemetry and Telecomm system. These modules were comprised of the realization of FEC, the shape of base-band wave, interpolation, synchronization and decode of Viterbi. All the design of these modules can be simulated under the simulation environment of ISE and Modelsim.更多还原