FIR数字低通滤波的物理解释

The Physical Explanation of FIR Digital Low Pass Filter

利用MATLAB的运算和作图功能,针对数字信号处理的特点,以数字低通滤波器为例,分析了信号经过系统在时域卷积运算和频域乘积运算的物理意义。

Using the calculating and mapping function of the MATLAB, considering the characteristics of digital signal processing, this paper analyzes the physical significance of the convolution operation in time domain and the productive operation in frequency domain with the digital low pass filter as an exemplification.