www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/DesignTwoStageDecimatorExample.m
%% Design Two-Stage Decimator % Design a two-stage decimator by cascading |dsp.CICDecimator| and % |dsp.CICCompensationDecimator| System objects. %% Construct the objects CICDecim = dsp.CICDecimator('DecimationFactor', 6, ... 'NumSections', 6); fs = 16e3; % Sampling frequency of input of compensation decimator fPass = 4e3; % Passband frequency fStop = 4.5e3; % Stopband frequency CICCompDecim = dsp.CICCompensationDecimator(CICDecim, ... 'DecimationFactor', 2, ... 'PassbandFrequency', fPass, ... 'StopbandFrequency', fStop, ... 'SampleRate', fs); %% Create a cascade of the two objects using the |cascade| method FC = cascade(CICDecim, CICCompDecim); %% Visualize the frequency response of the cascade f = fvtool(CICDecim, CICCompDecim, FC, 'Fs', [fs*6, fs, fs*6],... 'Arithmetic', 'fixed'); set(f, 'NormalizeMagnitudeto1', 'on'); legend(f,'CIC Decimator','CIC Compensation Decimator', ... 'Overall Response');