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

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?

[Håkon]

Figured it out, I had the wrong toolbox. Apperently I do not have DSP system toolbox, only signal processing toolbox.

Answer 1

[Ravi]

http://www.mathworks.in/help/dsp/ref/filterbuilder.html

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)

[Paola]

This doesn't work if you don't have DSP toolbox, since it doesn't recognize "iirnotch" function.