中文说明：用matlab设计IIR和FIR滤波器，主要是用窗函数法设计FIR滤波器，包括低通滤波器，带通滤波器和高通滤波器。
English Description：
Design of IIR and FIR filters with MATLAB, primarily designing FIR filter with Windows function method, including the low-pass filter, band-pass filter and a high-pass filter.