www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/DesignLowpassFilterExample.m
%% Design Lowpass Filter % Construct a lowpass object with order, passband-edge frequency, % stopband-edge frequency, and passband ripple specifications, and then % design an elliptic filter. d = fdesign.lowpass('n,fp,fst,ap',6,20,25,.8,80); design(d,'ellip'); % Starts FVtool to display the filter. %% % Construct a lowpass object with filter order, passband edge frequency, % passband ripple, and stopband attenuation specifications, and then % design an elliptic filter. d = fdesign.lowpass('n,fp,ap,ast',6,20,.8,60,80); design(d,'ellip'); % Starts FVTool to display the filter.