www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/DesignMultibandArbitraryMagnitudeFilterExample.m
%% Design Multiband Arbitrary-Magnitude Filter % Use |fdesign.arbmag| to design a three-band filter. % Copyright 2015 The MathWorks, Inc. %% % * Define the frequency vector |F| = [0 0.25 0.3 0.4 0.5 0.6 0.7 0.75 % 1.0]. % * Define the response vector |A| = [1 1 0 0 0 0 0 1 1]. N = 150; B = 3; F = [0 .25 .3 .4 .5 .6 .7 .75 1]; A = [1 1 0 0 0 0 0 1 1]; A1 = A(1:2); A2 = A(3:7); A3 = A(8:end); F1 = F(1:2); F2 = F(3:7); F3 = F(8:end); d = fdesign.arbmag('N,B,F,A',N,B,F1,A1,F2,A2,F3,A3); Hd = design(d); fvtool(Hd) %% % A response with two passbands -- one roughly between 0 and 0.25 and the % second between 0.75 and 1 -- results from the mapping between |F| and % |A|.