MATLAB: D = fdesign.lowpass(‘Fp,Fst,Ap,Ast’,1,3,0.5,40,60);

dsp

d = fdesign.lowpass('Fp,Fst,Ap,Ast',1,3,0.5,40,60);

sir, please tell me what is 1,3,0.5,40,60 im assuming that here 60 is sampling frequency please describe other parameters

Best Answer

 d = fdesign.lowpass('Fp,Fst,Ap,Ast',1,3,0.5,40,60);

1 is the passband frequency
3 is the stopband frequency so the region between 1 and 3 Hz is a transition region
0.5 is the passband ripple in dB
40 is the amount of stopband attentuation you want in dB
60 is the sampling frequency

Related Solutions

MATLAB: How to design FIR lowpass filter with cutoff frequency, fc1 = 20 Hz and FIR bandpass filter with cutoff frequency fc2 = 10 Hz and fc3 = 35 Hz.

Déjà vu

how to design IIR highpass filter with cutoff frequency of 20Hz and FIR bandpass filter with cutoff frequency of 10Hz and 15Hz?

Make the appropriate changes to get the cascaded filter you want.

MATLAB: Fir and iir filtering

You have to know your filter specifications. If you do, you can do both with fdesign.lowpass and fdesign.highpass

fdesign.lowpass and fdesign.highpass have different specification strings which support different filter designs.

The default string 'Fp,Fst,Ap,Ast' supports both FIR and IIR designs.

Here is an example:

Design a lowpass filter with a passband frequency of 1 kHz, a stopband frequency of 1.5 kHz, passband ripple of 0.5 dB, and stopband attenuation of 40 dB. The sampling frequency is 20 kHz

   d = fdesign.lowpass('Fp,Fst,Ap,Ast',1e3,1.5e3,0.5,40,20e3);
   designmethods(d)  %shows which designs are valid for this spec
   Hdeq = design(d,'equiripple'); % FIR filter
   Hbutt = design(d,'butter'); %IIR design

Best Answer

Related Solutions

MATLAB: How to design FIR lowpass filter with cutoff frequency, fc1 = 20 Hz and FIR bandpass filter with cutoff frequency fc2 = 10 Hz and fc3 = 35 Hz.

MATLAB: Fir and iir filtering

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