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17268 Discussions

response of the filter designed using CIC MegaCore function

Altera_Forum
Honored Contributor II
‎01-21-2010 04:42 PM
1,624 Views

Hi, all. I have used "CIC" MegaCore function to implement a CIC filter and I am wanting to know the true response of this filter. In this case, I tried to export the coefficients of the filter from the MegaCore Wizard. However, I have no idea how to do with it. Does anyone know how to write out the coefficients from the wizard? Or how to have the true response of the filter? Thank you very much for the suggestion and help!

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Altera_Forum
Honored Contributor II
‎01-21-2010 07:53 PM
681 Views

Hello 

Coefficients of a CIC filter? I think you have to study a bit harder what is a CIC. Megacore docs have a good intro to CIC filters and Uwe-Meyer, Baese book "Digital signal processing with field programmable gate arrays" is a must if you want to work in this field. 

Good luck
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Altera_Forum
Honored Contributor II
‎01-21-2010 07:54 PM
681 Views

if you run that coefficients .m file in MATLAB it will plot the frequency response for you and also design a compensation FIR.

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Altera_Forum
Honored Contributor II
‎01-21-2010 09:43 PM
681 Views

As you can find out from basic CIC literatur, the frequency domain response of a CIC decimator has always the form (sin(x)/x)**n.

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