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西安欧亚学院

本科毕业论文（设计）

题 目： 学生姓名：

指导教师： 所在分院： 专 业： 班 级：

二O一一年 四月

基于Matlab的数字滤波器的设计与仿真

摘要:

传统的数字滤波器的设计关键词：.FDAtools;FIR数字滤波器;simullink仿真;窗函数法;频率采样法

Matlab-based digital filter design and simulation

Abstract:

The traditional digital filter, the design process of complex computing workload big, filtering properties, affected it hard to adjust the application. This paper introduces a kind of Filter matlab FDAtools Analysis and Design tools themselves and order the Filter Tool (by rapid and effective Design) of software component Design method of traditional digital Filter. Using matlab language is given for program design and use of signal processing fdatool toolbox of tools for interface design of the specific steps. Matlab

design filter, can always contrast the design requirements and filter characteristics, easy adjustment parameters greatly reduced the workload, be helpful for the optimization design of fir. This paper also introduces how to use matlab simulation software simulink filters the design of simulation.

Keywords: FDAtools;FIR digital filters; simullink;simulstion window function method;frequency sampling method

第1章 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 第2章 2.1 2.2 2.3 第3章 3.1 3.1.1 3.1.2 3.2 3.2.1 3.2.2 3.3 3.3.1 3.3.2 第4章

绪论........................................................1 课题背景及目的..............................................1 国内外研究现状..............................................1 研究内容....................................................1 研究方法....................................................2 Matlab简介..................................................2 Matlab的特点................................................2 Matlab的系统组成............................................2 论文提纲....................................................3 数字滤波器基本原理..........................................4 数字滤波器原理..............................................4 数字滤波器分类..............................................4 数字滤波器技术要求..........................................6 FIR数字滤波器的设计.......................................9 窗函数法设计FIR数字滤波器.................................9 窗函数法设计原理...........................................9 FIR数字滤波器的设计实例...................................10 频率采样法设计FIR数字滤波器...............................11 频率采样法的基本思想.......................................13 FIR数字滤波器的设计实例...................................14 窗函数法和频率采样法.......................................18 通过实例对两种方法做比较...................................18 两种方法设计带通滤波器.....................................20 应用Simulink对FIR数字滤波器滤波..........................22