【毕业论文】msk调制器的设计与实现.doc

学士学位论文 论文题目：MSK调制器的设计与实现 Graduation Thesis of Chongqing University of Arts and Sciences The Design and Realization of Minimum Frequency Shift Keying Modulation System 目 录 摘 要 I Abstract II 1 绪论 1 1.1 前言 1 1.2 国内外研究现状综述 1 1.2.1 FPGA研究现状综述 1 1.2.2 MSK调制解调研究现状综述 2 1.3 本课题的主要研究内容与意义 3 1.3.1 本课题的研究内容 3 1.3.2 研究本课题的意义 3 2 研究所涉及的理论知识介绍 4 2.1 直接频率合成技术（DDS） 4 2.1.1 DDS概述 4 2.2.2 DDS实现原理 4 2.2 MSK调制原理 5 2.2.1 MSK调制的概念 5 2.2.2 MSK调制的基本原理 5 2.2.3 基于DDS的MSK调制原理 6 2.3 芯片的选择 7 2.3.1 核心板芯片 7 2.3.2 DA转换芯片 8 3 系统的开发与设计 8 3.1 系统硬件设计 8 3.1.1 FPGA核心板（EP1C6Q240C8） 8 3.1.2 按键控制部分 10 3.1.3 D/A转换模块 10 3.1.4 系统的硬件实物 10 3.2 系统软件设计 11 3.2.1 设计思路 11 3.2.2 DSP Builder设计流程 11 3.2.3 用DSP Builder的设计实现 12 3.2.4 在QuartusⅡ下综合设计 13 4 系统仿真分析 15 4.1 系统在Matlab下的仿真分析 15 4.2 系统在QuartusⅡ下的仿真分析 16 5 实际系统应用验证 16 6 结论与展望 17 6.1 研究的主要结论 17 6.2 对未来工作的展望 17 参考文献 18 附 录 19 附 录1 MSK调制器程序： 19 附 录 2 分频器程序： 23 附 录 3 芯片引脚对照表 24 致 谢 25  摘 要关键词 Abstract In the communications system which is composed of various functional modules, the modem module is a very important signal to transform links. Whether to study modules on modulation or on demodulator modules, will have a very important practical significance. Minimum frequency shift keying (MSK) modulation wave has a constant envelope in the area, and in the frequency spectrum there is a very small side lobe, a narrow width of the main valve, small radiation, and the main valve outside the bandwidth side lobe of the power spectrum also decreased more rapidly, thereby overcoming the general FSK, PSK, QAM modulation, such as a phase mutation has been affected by high frequency components for signal attenuation shortcomings. It is precisely because of this background, this issue will be on a MSK modulator. A system which is designed on FPGA devices, can shorten the development cycle and reduce capital investment and enhance its reliability is more important to improve the efficiency of system development. Therefore, this issue pre