数字信号处理实验指导书

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1、数字信号处理实验指导书电气与信息工程系陈爱萍张可为陈军根湖南工程学院2007年3月10日目录第1章关于实验用计算机语言MATLAB......................................21.1MATLAB简介·····························································21.2MATLAB环境·································································41.2.1MATLAB的工作空间······················

2、·········································41.2.2MATLAB的命令窗口·································································41.2.3MATLAB的图形窗口·····························································121.3MATLAB的M文件·································································13l.3.1M文件·

3、················································································14l.3.2函数文件··············································································151.4实验用MATLAB函数箱简介··········································161.5MATLAB的帮助系统··············································

4、····19第2章上机实验...............................................................................27实验一、离散序列的产生、运算与分解··································27实验二、系统频率响应和单位脉冲响应··································30实验三、信号、系统及系统响应···········································31实验四用FFT作谱分析······················

5、·····························34实验五用双线性变换法设计IIR数字滤波器·························41实验六：用窗函数法设计FIR数字滤波器·······························551第1章关于实验用计算机语言MATLAB1.1MATLAB简介MATLAB（MatrixLaboratory矩阵实验室）是Mathworks公司于1982推出的一套高性能的数值计算和可视化软件。MATLAB提供了一个人机交互的数学系统环境，该系统的基本数据结构是矩阵，在生成矩阵对象时，不要求明确的维数说明。与利用C语言或F

6、ORTRAN语言作数值计算的程序设计相比，利用MATLAB可以节省大量的编程时间，是适合于工程应用各领域的分析、设计和复杂计算的数学软件，易学易用，在工程技术界，MATLAB已广泛应用于自动控制理论、数理统计、数字信号处理、时间序列分析、动态系统仿真、图像处理等领域。MATLAB是一个功能十分强大的系统，是集数值计算、图形管理、程序开发为一体的环境，MATLAB还具有很强的功能扩展能力，与它的主系统一起，可以配备各种各样的工具箱，以完成一些特定的任务。目前，Mathwork公司推出了18种工具箱。用户可以根据自己的工作任务，开发自己的工具箱。新的版本集中了日常数学处理中的各种功

7、能，包括高效的数值计算、矩阵运算、信号处理和图形生成等功能。在MATLAB环境下，用户可以集成地进行程序设计、数值计算、图形绘制、输入输出、文件管理等各项操作。MATLAB利用其丰富的函数资源，使编程人员从繁琐的程序代码中解放出来。MATLAB的最突出的特点就是简洁，MATLAB用更直观的、符合人们思维习惯的代码，代替了C和FORTRAN语言的冗长代码。MATLAB给用户带来的是最直观、最简洁的程序开发环境。以下简单介绍一下MATLAB的主要特点。①语言简洁紧凑，使用方便灵活，库函数极其丰富