摘要
数字通信系统传输数字信号时经常混杂着各种频率的干扰信号,数字滤波器可以利用数值运算,起到其他模拟滤波器根本无法实现的杂波滤除作用。本文首先讨论了数字滤波器的原理,进一步给出了巴特沃斯数字滤波器的设计思路,然后利用MATLAB软件实现了对巴特沃斯数字滤波器的仿真试验,分析了巴特沃斯数字滤波器的各类幅频特性、相关的设计方法和对应的设计步骤等。通过巴特沃斯数字滤波器的设计与实现,完成了低通滤波、高通滤波、带通滤波、带阻滤波的仿真试验,最后得到巴特沃斯数字滤波器的幅频特性曲线,并研究了巴特沃斯数字滤波器的相关幅频特性。
When transmitting digital signals,digital communication systems are often mixed with interference signals of various frequencies.Digital filters can use numerical operation to achieve clutter filtering that other analog filters can not achieve at all.This paper first discusses the principle of digital filter,further gives the design idea of Butterworth digital filter,then realizes the simulation of Butterworth digital filter by using MATLAB software,and analyzes various amplitude frequency characteristics,relevant design methods and corresponding design steps of Butterworth digital filter,through the design and implementation of Butterworth digital filter,the simulation of low-pass filter,high pass filter,band-pass filter and band stop filter are completed.Finally,the amplitude frequency characteristic curve of Butterworth digital filter is obtained,and the related amplitude frequency characteristics of Butterworth digi⁃tal filter are studied.
作者
黄波
HUANG Bo(School of electronic information and electrical engineering,Chengdu University,Chengdu Sichuan 610106)
出处
《河南科技》
2021年第36期10-12,共3页
Henan Science and Technology
关键词
数字滤波器
巴特沃斯
MATLAB
幅频特性
digital filter
butterworth
MATLAB
amplitude frequency characteristic
