本文件为一个word文档。本文档基于MATLAB平台设计了带通滤波器，滤除信号中特定频率成分，具体功能word中有详细说明。本文件旨在通过一个简单的实例，说明基于MATLAB的数字滤波器设计原理，并在最后总结了数字滤波器的设计规律，文件内容对初学者有很大的帮助。-This document is a word document. This document is based on MATLAB platform design bandpass filter, filter out specific frequency component signal, word specific functions are described in detail. This document aims through a simple examples to illustrate the digital filter design based on the principle of MATLAB and concluded the design rule of the digital filter, the file content is very helpful for beginners.