群时延是通信系统性能的重要指标，这是时域群时延滤波器的设计程序-Group Delay is an important indicator of performance, communication system, which is time-domain group delay filter design program

从频率域对线性群时延失真和抛物线群时延失真进行仿真设计-From the frequency domain for linear parabolic group delay distortion and group delay distortion simulation design