基于FPGA的QDPSK调制解调技术的研究及实现

【作者】 常红霞；

【导师】 蔡征宇；

【作者基本信息】 南京理工大学 ， 通信与信息系统， 2007， 硕士

【摘要】 现代通信系统要求通信距离远、通信容量大、传输质量好。作为其关键技术之一的调制解调技术一直是人们研究的一个重要方向。用FPGA实现调制解调器具有体积小、功耗低、集成度高、可软件升级、抗干扰能力强的特点，符合未来通信技术发展的方向。论文从以下几个方面讨论和实现了基于FPGA的调制解调系统。论文首先介绍了调制解调系统的发展现状及FPGA的相关知识。然后介绍了几种常见的相位调制解调方式，重点是QDPSK调制解调系统的理论算法。论文重点介绍了QDPSK解调调制系统的具体实现。首先，在在MATLAB环境下对系统里的每个子模块完成了功能仿真，并取得满意的仿真结果；其次，在QDPSK调制解调系统功能仿真正确的基础上，对每个模块的功能编写C++算法，并且验证了算法的正确性和可实现性；最后，在altera公司的FPGA开发平台QuartusⅡ6.0上，采用Verilog硬件描述语言对QDPSK调制解调系统实现了时序仿真和综合仿真。更多还原

【Abstract】 For distance, large communication capability and high transmission quality arerequired in modern communication system. Modulation and demodulation, which is one ofthe most key techniques in communication, has always been an important aspect ofresearching field. The modern realized by FPGA has many advantages, such as smallervolume, low-power dissipation, integrity high, updated of software, capability ofantijamming and so on. This is in accordance with the direction of the future thechniquesdevelopment. This thesis primarily discusses the modulation and demodulationcommunication system based on FPGA from some aspects below.First, the thesis resarches the development and actuality of the modulation anddemodulation technique and the characteristics and the design procedure of FPGA.The thesis introduced the specific realization of the QDPSK modulation anddemodulaton majorly. Firstly, QDPSK modulation and demodulation system are separatlymade, every model of the systems is analyised. And the simulations of the systems aremade by MATLAB, the results of the simulation is satisfying. Secondly, on the right basisof the modulation, C++ algorithm of every model is programmed. Correctness andrealizability of the algorithms are verificated. Lastly, sequential simulation and synthesissimulation are made by Verilog hardware language in QuartusⅡ6.0.更多还原