基于FPGA的PSK调制解调仿真与实现

论文总字数：15238字

摘 要

调制解调能实现数字信号和模拟信号之间的转换，是实现计算机之间远程通讯的必要过程。相移键控调制解调是经过国际电信联盟标准化的一种重要数字调制解调方式，而其中的相位调制由于采用干涉技术而具有很高的检测灵敏度和极大的动态测量范围，抗干扰能力强，并且传感器形式灵活多样，适用于多种物理量和不同的测量环境，对噪声抑制更好，所以它成为了当今大部分通讯设备在调制解调过程中首要选择的方案。鉴于此，本文对基于FPGA的PSK调制解调系统进行设计与仿真，主要是对相位调制中的的差分相移键控和正交相移键控两种方法进行仿真与实现。本文主要是利用VHDL语言来设计程序，从逻辑上实现调制解调系统，并通过QuartusII软件进行程序逻辑检错和编译，利用其波形文件进行仿真验证，完成管脚编译之后，将编译成功的工程烧入试验箱中，通过实验箱观察调制解调过程中的波形，与理论中的波形进行对比分析来验证设计的正确性。

关键词：DPSK；QPSK；调制，解调；VHDL；FPGA

Simulation and Implementation of PSK Modulation and Demodulation Based on FPGA

Abstract

Modulation and demodulation can realize the conversion between digital signal and analog signal, which is the necessary process to realize the long-distance communication between computers.Phase shift keying modulation demodulation is standardized by the international telecommunication union an important digital modulation demodulation method, and the phase modulation by using interference technology has high detection sensitivity and dynamic measuring range, great anti-interference ability is strong, flexible and varied in form, and the sensor is suitable for a variety of physical quantities and different measurement environment, better for noise suppression.Therefore, it has become the primary choice of most of today's communication equipment in the modulation and demodulation process.In view of this, this paper designs and simulates the PSK modulation and demodulation system based on FPGA, mainly simulates and implements the two methods of differential phase shift keying and orthogonal phase shift keying in phase modulation.In this paper, the VHDL language is used to design the program, and the modulation and demodulation system is realized from the logic. The QuartusII software is used to check the program logic error and compile, and the waveform file is used for simulation verification. The successfully compiled project is burned into the test box, and the waveforms in the process of modulation and demodulation are observed through the experiment box, and the waveforms in theory are compared and analyzed to verify the correctness of the design.

Keywords: DPSK；QPSK；Modulation；Demodulation；VHDL；FPGA

目 录

摘 要 I

Abstract II

第一章 绪 论 1

1.1 课题背景及意义 1

1.2 FPGA介绍 1

1.3 VHDL介绍 1

1.4 本文内容 2

第二章 调制解调原理 3

2.1 调制解调的意义 3

2.2 ASK调制解调 3

2.3 FSK调制解调 4

2.4 DPSK调制解调原理 5

2.4.1 DPSK调制原理^[1]： 5

2.4.2 DPSK解调原理 6

2.5 QPSK正交相移键控调制解调原理^[3]： 7

2.5.1 QPSK^[4]调制原理： 8

2.5.2 QPSK解调原理： 8

第三章PSK调制解调的FPGA实现 10

3.1 基于FPGA的DPSK调制解调 10

3.1.1 DPSK调制解调系统总体设计 10

3.1.2 DPSK调制解调VHDL^[5]编写与电路原理图搭建^[6] 10

3.1.3 DPSK调制解调系统仿真与分析 13

3.1.4 DPSK调制解调系统在RZ9681平台上的仿真 13

3.2 基于FPGA的QPSK调制解调 16

3.2.1 QPSK调制解调系统总体设计 16

3.2.2 QPSK调制解调VHDL程序编写与电路原理图搭建 16

3.2.3 QPSK调制解调系统仿真与分析 21

3.2.4 QPSK调制解调系统在RZ9681平台的仿真 22

第四章 总结 25

致 谢 26

参考文献 27

第一章 绪 论

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