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by mwbajor 839 days ago
Bandpass sampling is a regular technique used in the RF world to mix down a signal to its final IF or baseband frequency, digitally. In this case, you are undersampling but using a well defined signal that you have apriori knowledge of where it is before and after sampling.

https://en.wikipedia.org/wiki/Undersampling#:~:text=In%20sig....