www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/FrequencyResponseOfQuasilinearPhaseIIRHalfbandDecimatorExample.m
%% Frequency Response of Quasi-Linear Phase IIR Halfband Decimator %% % Create a minimum-order lowpass IIR halfband decimation filter for % data sampled at 44.1 kHz. The filter has a transition width of 4.1 kHz, % and a stopband attenuation of 80 dB. IIRHalfbandDecim = dsp.IIRHalfbandDecimator(... 'DesignMethod', 'Quasi-linear phase'); %% % Obtain the filter coefficients. c = coeffs(IIRHalfbandDecim); %% % Plot the magnitude and phase response. fvtool(IIRHalfbandDecim,'Analysis','freq')