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Altera_Forum
Honored Contributor
Honored Contributorproblem with FIR IP
FIR IP filter output waveform shake up and down , Input signal contains the useful signal and the noise signals , so the frequency of the noise signal may be greater than half of the sam...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- FIR IP filter output waveform shake up and down , Input signal contains the useful signal and the noise signals --- Quote End --- are you referring to analogue signal passed through an ADC? Once a signal is sampled into digital domain then the frequency range of digital domain is 0 ~ Nyquist and anything more than Nyquist would have already aliased unless there was anti alias filter. Your FIR should pass the signal and remove noise from edge of signal to Nyquist and it should be sampling at ADC rate.
