基于MATLAB的FIR数字低通滤波器分析和设计

Analyze and Design of FIR Digital Low Pass Filter Based on the MATLAB

以FIR数字低通滤波器为例,详细分析时域卷积运算和频域加权算法的物理意义.并利用MATLAB的声音处理函数作为数据接口,利用多媒体播放器作为交互界面,利用MATLAB的FDATool作为滤波器设计工具,设计一组语音低通滤波器,通过对比滤波前后的语音效果,可加深对数字信号处理的认识.

Analyze the physics significance of the convoluting in time domain and the weighting in trequency domain in detail by using the digital low pass filter as the exemplification. And by using the MATLAB sound processing function as the data connection, the multimedia players as the interactive contact surface, the MATLAB FDATOOl as the filter design tool, designed a group of experiments for audio low pass filter with the purpose of strengthening the understanding of the digital signal processing by comparing the change of the audio effect before and after the filter.