I'm new to digital filters. So I'm trying to get things right and I can't find an explicit answer to my question on the internet.
Question: Digital filters only accept samples as input? I mean the input can not be zeros nor ones. It can only be samples. If that's the case, then the typical position for a digital filter would be after the receiver (I mean before converting to bits).
So receiver would be like:
$$ \mbox{antenna} \rightarrow \mbox{amplifier} \rightarrow \mbox{Sampler} \rightarrow \mbox{Digital Filter} \rightarrow \underbrace{\mbox{DAC}}_{\tiny \mbox{here I should have filtered samples}} $$
Please correct me and kindly ignore any coding or LNAs and stuff like that.