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Altera_Forum
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11 years ago

FIR and CIC MegaCores Altogether

Hi, I have instantiated FIR II MegaCore as a Pulse-Shaping and upsampling by 8 filter, now I want to use CIC MegaCore after FIR to interpolate the signal... I didn't use Back Pressure feature in...
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Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

I am a bit lost between figures. (10MHz,50MHz,280,100MHz).

if your symbol rate is 50000/280 then you don't need fractinalupsampler

you need to go up from 50000/280 to 100000 = 560

8 in rrc, 10 in comp filter, 7 in cic

well just use a fir interpolator at 70 or two firs at 10 and 7

or rrc to go up by 56, fir by 10