Arbitrary Group Delay Filter Design Specification
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Hi there,
I've tried asking this before, and never got an answer. I've changed my question somewhat so here it is:
I want to create an arbitrary group delay filter so that I can achieve the following delays at the following frequencies:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/322750/image.jpeg)
I've tried using the filter design tool several times, but the delay calculated (even with just an order 2 filter) is higher than expected. What can I do to realise this filter in MATLAB???
Many thanks!
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Mathieu NOE
2020-10-13
Hi
If I were you, I would design multiple parallel bandpass filters centered on the octave or 1/3 octave frequencies (for refined treatment)
(NB the time sum of all filtered components equals the original signal)
at each individual bandpass filter I would just add the right amount of sample delay to match your specs
some this solves your problem
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