基于MatLab的IIR数字滤波器设计与应用  

Design and Application of IIR Digital Filter Based on MatLab

作　　者：尹园威 马俊涛 史林 王丹 刘贺雄 Yin Yuanwei;Ma Juntao;Shi Lin;Wang Dan;Liu Hexiong(Shijiazhuang Campus of Army Engineering University,Shijiazhuang,050003,China)

机构地区：[1]陆军工程大学石家庄校区,河北石家庄050003

出　　处：《中国现代教育装备》2021年第21期31-33,42,共4页China Modern Educational Equipment

摘　　要：数字滤波器的设计和应用是数字信号处理中的核心内容之一,是该课程的重点学习目标。在无限冲激响应数字滤波器的设计过程中,借鉴成熟的模拟滤波器设计方法,将数字滤波器的技术指标转换为模拟滤波器的技术指标,进行模拟滤波器的设计,之后通过一定的转换映射关系完成数字滤波器的设计。为提升教学效果和设计效率,以语音信号为对象应用MatLab软件进行数字低通、高通、带通滤波器的设计,经过仿真完成语音信号的处理,并对其时域、频域波形图进行了对比分析。The design and application of digital filter is one of the core contents of digital signal processing,which is the key learning target of this course.For infinite impulse response digital filter design process,draw lessons from the mature design method of analog filter,the digital filter specifications are converted to analog filter,the technical indexes of simulated filter design,through the transformation of a certain mapping relationship to complete the design of the digital filter.In order to improve the teaching effect and design efficiency,MatLab software was used to design digital low-pass,high-pass and bandpass filters,and the voicesignal was processed through simulation,and the waveform figure in time domain and frequency domain was compared and analyzed.

关 键 词：IIR数字滤波器 数字信号处理 语音信号 MATLAB仿真 

分 类 号：TN713.7[电子电信—电路与系统]