基于FPGA的MSK调制解调器的设计与仿真

文档编号:JD1172  文档字数:10913,页数:35  附任务书，开题报告，文献综述，外文翻译，中期检查

毕业设计说明书（文档）中文摘要

 本文根据数字信号MSK调制和解调的工作原理，采用模块化设计了一种基于FPGA芯片的MSK调制解调器。在调制过程中，利用数控振荡器NCO完成对MSK信号的调制，得到连续的MSK调制信号。用差分解调法对调制信号进行解调，然后使用FIR数字滤波器完成滤波。使用VHDL语言进行了模块设计和时序仿真，仿真时，简单介绍了MSK信号调制与解调算法的Matlab仿真，重点介绍了MSK信号调制与解调的FPGA实现，然后用Modelsim仿真验证所设计的调制解调器是否正确。所设计的调制解调器具有体积小、功耗低、集成度高、软件可移植性强、抗干扰能力强的特点，符合目前通信技术设计的发展方向。

关键词  MSK信号  FPGA  VHDL  NCO  差分解调

毕业设计说明书（文档）外文摘要

Title          Design and Realization of an                                  
                   MSK Modem Based on FPGA          _                                            

Abstract
In this dissertation, we design a MSK modem based on FPGA adopting the method of module on the grounds of the principle of digital signal MSK modulation and demodulation. In the modulation process, we use the NCO on the MSK signal modulation to get the consecutive MSK signal, and differential demodulation method are used on the modulation signal demodulation to get the demodulation signal. Then we use the FIR digital to complete the filtering. The VHDL Models are designed and simulated, on the simulation, a simple Matlab simulation of the MSK modulation and demodulation algorithm are introduced, focuses on the FPGA implementation of the MSK modulation and demodulation， then use the Modelsim simulation to correct the modem. The designed modem has the characteristics of small size, low consume, high integration, strong soft replant and high anti-interference, it is accordance with the direction of future communication technology design.

Keywords  MSK Signal  FPGA  VHDL  NCO   Difference Demodulation

目   次

1  引言 1
2  调制解调技术相关知识简介 2
2.1  MSK信号的简介 2
2.2  数字控制振荡器介绍 6
2.3  滤波器原理 8
3  调制与解调算法设计及模型建立 10
3.1  MSK信号的调制及Matlab仿真 10
3.2  MSK信号的解调及Matlab仿真 11
4.1  设计简介 13
4.2  FPGA芯片简介 13
4.3  数控振荡器的FPGA实现 14
5  MSK解调的FPGA实现及Modelsim仿真 16
5.1  设计简介及模块划分 16
5.2  输入缓冲及差分相乘模块的FPGA实现 16
5.3  数字滤波器的FPGA实现 17
结论 19
致谢 20
参考文献 21
附录A  Matlab仿真程序 22
附录B  Modelsim仿真程序 24

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