熟悉FIR滤波器设计的基本方法；掌握用窗函数设计FIR数字滤波器的原理及方法，熟悉相应的计算机高级语言编程；熟悉线性相位FIR滤波器的幅频特性和相位特性。

4.了解各种不同窗函数对滤波器性能的响应。-Familiar with the basic method of FIR filter design. Master design FIR digital filters using window function, the principles and methods of familiar with the corresponding computer programming in a high-level language　Familiar with linear phase FIR filter amplitude-frequency characteristic and phase characteristic.