摘要《信号与系统》是通信专业重要的课程，课程的内容偏理论化，所学的内容很抽象，所以在学习的时候会感觉比较吃力。在学习这一门理论课程时为了能够更好地理解，在教学中安排实验就显得很有必要。但是传统的实验实验室仪器会出现各种的问题，比如仪器的数量远远少于学生的人数，而且传统实验室的仪器比较老旧没有跟上科技的发展，所以本文要介绍一种虚拟仪器Labview。

虚拟仪器是一种图形化的编程语言,用于测量控制和信号处理,图形化很直观，易于理解并且具有很好的数据处理能力等特征,可以支持多种硬件平台。在高校符合信号与系统实验教学的要求,已经被用于国内外的一些学院和大学。有助于学生对基础理论课的学习，并提高实验和工程的实际能力，因此制作一个基于虚拟仪器的教学实验系统，是很有意义的。86608

本文以虚拟设备的概念，背景以及意义的简介为基础，结合国内外研究状况的趋势，对信号与系统课程的各个章重点实验模块的Labview仿真实验进行了设计。本论文主要完成了信号的产生，信号的基本运算，连续系统时域响应，时域卷积，快速傅里叶变换，连续系统频域分析，基于FFT求功率谱，信号抽样等具体实验；最后进行了课程网页制作，用Labview的web发布功能生成html网页文件，用Flash MX软件制作信号动画，再用Dreamweaver MX将动画插入到实验系统的网页。经过测试验证了仿真实验的有效性。

毕业论文关键词：Labview；信号与系统仿真；信号抽样；频域分析

Abstract "Signal and system" is an important communication professional courses, that is full of theory。And the content of the course is very abstract, so when student studying they will feel difficult。 In order to better understand and learn this kind of subject,  then the experiment study is necessary。

Virtual Instrument named Labview is a graphical programming language for measuring and signal processing。The language is very intuitive and easy to understand also has a good data processing capabilities and others。It can support a variety of hardware platforms。 Virtual Instrument meets the requirements of signal and system experimental teaching very much in some colleges and universities, and it has been used in some colleges and universities at home and abroad。 It is very meaningful to help students to study the basic theory course and to improve the engineering practical ability。 So it is necessary to make a teaching experiment system based on virtual instrument。

In this paper, based on a brief introduction of the concept, background and significance of virtual equipment, the trend of the research at home and abroad is combined to describe the basic principle and experimental tools of main experimental module in each chapter of signal and system。 Signal generation ,the basic processing of signal, continuous system response in time domain and time-domain convolution, fast Fourier transform, frequency domain analysis for continuous system, based on FFT for power spectrum, signal sampling and others are studied in this paper; At last it is to make the course web page。 The course HTML web page file is generated by the Labview web release function, and then use Flash software to make signal animation。Finally the flash animation is put into the web page of experimental system by Dreamweaver MX。 The validity of the simulation experiment is verified by the test。

Keywords: Labview; Signal and system emulation; Sampling of signals; Analysis in domain of frequency

目录 

第一章 绪论 1

1。1课题背景 1

1。2国内外研究现状 2