中文说明：
线性相位 FIR 低通、高通、带通和带阻滤波器的设计方法，频率采样设计法的基本概念和线性相位的实现方法。几种线性相位的特点，熟悉和掌握矩形窗、三角形窗、汉宁窗、海明窗、布莱克曼窗、凯塞窗设计 IIR 数字滤波器的方法，频率抽样设计法的线性相位的设计方法，并对各种线性相位的频率抽样法的设计给出调整和改进。 利用 MATLAB 进行各类 FIR 数字滤波器的设计方法。
English Description：
The design method of linear phase FIR low-pass, high pass, band-pass and band stop filters, the basic concept of frequency sampling design method and the realization method of linear phase. Several linear phase characteristics, familiar with and master the rectangular window, triangle window, Hanning window, Hamming window, Blackman window, Kaiser window design method of IIR digital filter, frequency sampling design method of linear phase design method, and give adjustment and improvement to the design of various linear phase frequency sampling method.