通信工程毕业设计（论文）-QAM传输系统的设计与实现.doc

南阳理工学院本科毕业设计(论文)
QAM传输系统的设计与实现
Design and Achievement Of QAM System
学院(系): 计算机与信息工程学院
专业: 通信工程
学生姓名:
学号:
指导教师(职称):
评阅教师:
完成日期: 2012年4月
南阳理工学院
Nanyang Institute of Technology
QAM传输系统的设计与实现
通信工程专业
[摘要]正交振幅调制QAM是一种相位和振幅联合控制的数字调制技术。它应用范围非常广泛,不仅在移动通信领域而且在有线电视传输、数字视频广播、卫星通信等领域都得到广泛应用。本文深入研究QAM调制解调的基本原理、系统结构及性能参数,实现QAM调制解调系统的Simulink仿真及性能分析;详细分析模拟信号数字化的基本理论及实现方法,实现差分脉码调制的Simulink仿真及性能比对;基于上述理论构建模拟信源QAM传输系统,并利用Matlab/Simulink进行建模仿真及性能验证。仿真结果表明,所构建的QAM数字传输系统可以实现模拟信号良好的传输。
[关键词] 数字传输;正交振幅调制;差分脉码调制;建模仿真
Design and Simulation of QAM System
Communcation Engineering Major Lin Long
Abstract : Quadrature amplitude modulation is a joint-controlled digital modulation technology of phase and amplitude. It is widely used not only in the munication field, but also in other fields, such as wire television transmission field, digital video broadcasting, munication, etc... This paper studies the basic principles of QAM modulation and demodulation, then simulates the whole 16QAM system and discusses performances of system by the simulink toolbox. This paper also analyses the basic principles and implementation method on digitalizing analog signals, then simulates the DPCM system and contrasts performances of system. At last, this paper designs a QAM transmission system of analog sources, then simulates the whole transmission system paring performances of system. The simulation shows analog signals can be transmitted correctly in the system designed in this paper.
Key words: digital transmission; quadrature amplitude modulation; differential pulse code modulation; model and simulate
目录
1引言 1
课题研究背景及意义 1
调制在通信系统中的作用 1
数字调制解调技术现状与发展 2
QAM调制解调技术在数字通信领域的应用优势 2
仿真软件介绍 3
论文主要内容及结构安排 3
2 QAM调制解调技术研究及Simulink仿真 4
QAM调制 4
QAM调制原理 5
QAM调制性能 6
QAM星座图 7
QAM解调 8
QAM调制解调系统的Simulink仿真 9
16QAM调制解调系统的Simulink仿真 9
64QAM调制解调系统的Simulink仿真 11
MQAM调制解调系统性能仿真分析 12
12
误码率分析 13
2.