实现凯泽窗设计低通、带通、高通滤波器，综合在一个图显示。设计滤波器时，用到的脉冲函数和脉冲响应函数都在压缩包里，所用的频率是数字频率值。-Kaiser window design to achieve low-pass, band-pass, high-pass filter integrated in a graph display. Filter design, the use of pulse function and impulse response function in the co