基于IIR数字滤波器的设计matlab毕业设计

目录
第一章 前言    4
1.1 课题背景    4
1.2 本课题主要内容    5
第二章 MATLAB介绍    5
2.1 MATLAB简介    5
2.2 特点    6
2.3 MATLAB界面    6
2.4 MATLAB语言平台及基本语法    7
2.5 数据分析    7
第三章 数字信号载波传输    8
3.1概述    8
第四章 数字信号载波传输的几种方式    9
4.1 载波幅度调制（ASK）    9
4.1.1 ASK调制原理    9
4.1.2  数字ASK相干解调方式    10
4.2 基带移相键控（PSK）    13
4.2.1  PSK调制原理    13
4.2.2  数字PSK的相干解调法    13
4.2.3  二进制差分相移键控（DPSK）    14
4.3 正交幅度调制（QAM）    20
4.4 载波频率调制（FSK）    21
4.4.1 FSK的产生    21
4.4.2 FSK调制解调原理    22
第五章 结束语    26
参考文献    27
附录    28
致谢    29

摘要：数字信号与信息科学的迅猛发展，计算机和通信系统的迅速发展的理论和实践，通信系统是将信息从信源发送到一个或者多个目的地，用来达到各种信息传输过程的一般技术体系。数字信号调制与解调过程中起着重要的信息传递的作用。为了结合计算机仿真，美国MathWork公司推出的MATLAB软件是一个最优秀的科技应用软件。MATLAB完全可以将理论与实际应用结合在一起，以此激发的学生的学习兴趣，以此提升了学习的效果。
为了学习更方便的数字信号，美国公司将MATLAB特设了学习辅助软件作为学习数字信号基础，数字信号载波传输的分析及仿真完全充分的利用了MATLAB快速操作，文字，图形，声音及交互式人机界面等特点来进行的。MATLAB是一种将强大功用结合为一体的科学计算机语言，它拥有了数值运算、制作图像、图像操作和系统仿真等，它工具箱和功能非常丰富，拥有强大的矩阵运算、图形可视化，因此提供了极大的方便在通信系统的调制和解调过程的分析中。
本论文大概介绍了数字信号系统的概念，接着介绍了调制和解调的方式，继而具体介绍了我们经常使用的几种调制和解调的方式和数字信号载波传输在MATLAB中的仿真。数字信号课程也是我们专业的必修课程。
关键字：数字信号载波传输，MATLAB，仿真

ABSTRACT：Digital signal theory and practical application with the rapid development of information science and computer and rapid development, the communication system is to send information from the source to one or more destinations, is used to implement the floorboard of the technology of information transmission system. In the process of the digital signal modulation and demodulation plays a important role in information transfer. MathWork companies in the United States launched in order to combine the result of computer simulation of MATLAB software is one of the most excellent technology application software. MATLAB can blend theory and practical application, to inspire the students' interest in learning, to enhance the learning effect.
In order to learn more convenient digital signal, the company will be AD hoc learning software MATLAB as a learning based digital signal, completely full use of MATLAB rapid operation, text, graphics, sound and interactive features such as man-machine interface to an analysis and a simulation of digital signal transmission. MATLAB is a powerful function in combination with computer language for the integration of science, it has the numerical computing and making images, image manipulation, and system simulation, etc., and its toolbox and function is very rich, has a strong matrix operation, the graph visualization, thus provides a great convenience in the communication system of modulation and demodulation process analysis.
This paper roughly introduces the concept of digital signal system, then introduces some modes of the modulation and demodulation, and concretely introduces the way we often use several kinds of modulation and demodulation and digital signal transmission in the MATLAB simulation. Digital signal course is our professional required course.
KEY WORDS: Digital signal transmission, MATLAB, simulation

第一章 前言
1.1 课题背景
随着现代数字信号的快速发展，数字调制解调技术主要涉及在所有的工程技术领域中，数字信号处理技术的飞速成长，全球性信息性高速公路建设的浪潮也都正在进行当中。今天的各种传输媒