基于 MATLAB GUI的 IIR 数字滤波器平台设计

摘要

Combining with the research of digital filter in the digital signal processing′s theory,it analyzed the typical design methods of IIR digital filter ,built digital filter design model ,and used MATLAB to sim-ulate the design methods of IIR digital filter in this paper .It designed the interactive platform of IIR digit-al filter in MATLAB GUI graphical program environment ,which can design filter′s specifications accord-ing to the actual tasks required , compare and analyze the frequency characteristics of analog and digital filters.Through the reading datas ,analyzing the amplitudes and the choice of filter the filting that can real-ize of the actual sample signals .%结合数字信号处理理论中对数字滤波器的研究，分析IIR数字滤波器的典型设计方法，建立数字滤波器设计模型，并利用MATLAB软件对IIR数字滤波器设计方法进行仿真。同时，在MATLAB GUI图形界面编程环境下设计IIR数字滤波器交互式平台，该平台可根据实际任务需要来设计滤波器的技术指标，对比分析模拟滤波器和数字滤波器的频率特性，同时通过数据读取、幅值分析以及滤波器的选择实现对实际样本信号的滤波功能。