Can not find the comb filter or notch filter in my processing toolbox?

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Håkon
Håkon on 24 Jun 2013
Commented: Paola on 27 Jun 2018
Hi,
I am working on the following version of matlab and SPT
MATLAB Version 7.14 (R2012a)
Signal Processing Toolbox Version 6.17 (R2012a)
From looking at the web I understand that the signal processing toolbox should include the comb filter and notch filter under fdesign. This is not the case in my version.
What is the problem?
  1 Comment
Håkon
Håkon on 24 Jun 2013
Figured it out, I had the wrong toolbox. Apperently I do not have DSP system toolbox, only signal processing toolbox.

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Answers (1)

Ravi
Ravi on 24 Jun 2013
or You can just type help iirnotch and then see the following example:
% Design a filter with a Q-factor of Q=35 to remove a 60 Hz tone from % system running at 300 Hz. Wo = 60/(300/2); BW = Wo/35; [b,a] = iirnotch(Wo,BW); if you replace the 60 with 50 Hz and then do: Y = filter(b,a,X)
  1 Comment
Paola
Paola on 27 Jun 2018
This doesn't work if you don't have DSP toolbox, since it doesn't recognize "iirnotch" function.

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