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Altera_Forum's avatar
Altera_Forum
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12 years ago

FIR interpolator

Hello guys !! I'm trying to understand the FIR compiler interpolator. I have a complex signal clocked at X MHz. Now I want to have it interpolated by a 3x factor so that the output frequen...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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you need to cut after 2/60 and gently towards 13/60:

h=firls(20,2*[0 2 12 30]/60,[1 1 0 0]);

freqz(h,1,0:.01:15,60)

only 21 taps for up4

I don't know what tool you are using but I expect sampling rate definition to be defined in the doc.

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I am using the altera fir compiler megawizard. I've read the userguide but it seems not so clear what for sample rate is intended.