www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/SingleStageFiltersExample.m
%% Single-Stage Filters % Create |src|, a multistage sample rate converter with default properties. % |src| converts between 192 kHz and 44.1 kHz. Find the individual filters % that are cascaded together to perform the conversion. % Copyright 2015 The MathWorks, Inc. %% src = dsp.SampleRateConverter; c = getFilters(src); %% % Visualize the frequency response of the decimator used in the % first stage of the process. m = c.Stage1; [h,w] = freqz(m); plot(w/pi,20*log10(abs(h))) xlabel('\omega / \pi') ylabel('Magnitude (dB)')