Hi! can anyone give me some hints on how to handle with the noise of DDC/DUC
design implemented by CIC and FIR? I have realized the function of DDC/DUC,but
it comes out that the noise power is too high for my machine,and the noise
analyzed in freq has a peak in the centre of each carrier.can anyone pls help
me? thanks!
Just a guess but your sine you are using to down-convert might be noisy?