设计一CQMFB，低通滤波器H0 (z)来自一半带滤波器。该半带滤波器的长度为47，通带截至频率ωp = 0.42 π，试给出H0 (z)，H1(z)，G0(z)， G1(z)的幅频响应，单位抽样响应并画图。-The design a CQMFB, the low-pass filter H0 (z) from the half band filter. The length of the half-band filter 47, the passband cutoff frequency ωp = 0.42 π-test given h0 (z), H1 (z), G0 (Z), G1 (Z) of the amplitude-frequency response, response unit sampling and Paint.