利用单带滤波器来设计一个半带滤波器，并显示半带滤波器H0,H1,及 H0+H1的幅频响应单带滤波器的归一化截止频率为0.84,长度＝16，半带滤波器的长度＝31。-Single-band filter design using a half-band filter, and display the half-band filter H0, H1, and H0 H1 magnitude response of the single-band filter normalized cutoff frequency of 0.84, the length of

= 16, half-band filter length = 31.