MATLAB: Need help in designing a filter which removes all 1 Hz frequencies.

dsp

 I have white noise from this white noise i want to remove all 1 Hz frequencies using LPF 
In matlab how can be design a LPF with 1Hz cutoff freq

Best Answer

There are many ways. You have not told us your sampling frequency. Let me assume it is 60-Hz.
   d = fdesign.lowpass('Fp,Fst,Ap,Ast',1,3,0.5,40,60);
   Hd = design(d);
   % View filter magntidue response
   fvtool(Hd)
   % to filter data
   output = filter(Hd,inputdata);
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