摘要
数字滤波技术是数字信号处理的一个重要组成部分,滤波器的设计是信号处理的核心问题之一。本文根据IIR滤波器的设计原理,提出了MATLAB环境下基于双线性变换法的IIR滤波器设计方法,在该方法中只需要将数字滤波器的技术性能指标按双线性变换法转换为模拟滤波器的性能指标,再根据指定的模拟滤波器设计出相应的数字滤波器。文中给出了设计实例,仿真结果表明设计的各项性能指标均达到了指定要求,设计过程简便易行,MATLAB环境为设计IIR滤波器提供了一个可靠而有效的工作平台。
Digital filtering is an important part of digital signal processing, the design of digital filters is one of the kernel problems in digital signal processing. The paper introduces the method of double linear transform to design IIR filter in MATLAB environment. In the method it＇s necessary to transform the digital filter＇s parameter to analog filter＇s parameter according to double linear transform,and the digital filter is, designed based on the indicated filter. Example are also given, in the paper, the simulation result shows that the designed filter can meet the requirements very well and the design procedure is simple and practical. MATLAB provides a reliable and efficient work station to design IIR filter.
出处
《现代机械》
2006年第5期60-61,82,共3页
Modern Machinery
