基于MATLAB的FIR数字低通滤波器设计作者:周龙刚(陕西理工学院 物理与电信工程学院 通信工程专业 2025 级 4 班,陕西 汉中 723003）指导老师：井敏英[摘要]FIR数字滤波器是数字信号处理的一个重要组成部分，由于FIR数字滤波器具有严格的线性相位，因此在信息的采集和处理过程中得到了广泛的应用。本文介绍了FIR数字滤波器的概念和线性相位的条件，分析了窗函数法、频率采样法和等波纹逼近法设计FIR滤波器的思路和流程。在分析三种设计方法原理的基础上，借助Matlab仿真软件工具箱中的fir1实现窗函数法中的哈明窗设计FIR低通滤波器。[关键词］ FIR数字滤波器;线性相位窗函数；法哈明窗；MatlabDesigning FIR low—pass digital filter based on VHDL Zhoulonggang(Grade11,Class4，Major of Communication Engineering,School of Physics and Telecommunication Engineering ， Shaanxi University of Technology，Hanzhong 723003，Shaanxi）Tutor:JingYingMinAbstract：FIR digital filter is an important part of digital signal processing，the FIR digitalfilter with linear phase, so it has been widely applied in the collection and processing of information in the course of。 This paper introduces the concept of FIR digital filter with linear phase conditions， analysis of the window functionmethod and frequency sampling method and the ripple approximation method ofFIR filter design ideas and processes。 Based on analyzing the principle of three kinds of design method, using Matlab simulation software fir1 toolbox in design and implementation of FIR Hamming window window function method in the low pass filter.Keywords： FIR digital filter， linear phase,the window function method，Hamming window,Matlab 目 录 引言。.。....。。。。。..。。。.....。....。...。.。。。。。。.。...。..。。...。...。......。..。.。.。.。。。。。.......。.。。..。..。..。。。。.。.。..。。。.。。...。..。.。..。...。。.。。。。。...。。.。.。。...。。。。.....。11. 基本原理.......................................................
