[email protected] said: > Case A: you simply throw away samples, keeping only every nth sample, > without regard for the frequency content of the original signal.
> Case B: you first perform appropriate anti-aliasing filtering on the > original signal, and only then throw away all but every nth sample I don't think case A makes sense. You are throwing away information. You will get aliasing. Case B can be more complicated than a traditional low pass anti-aliasing filter. Consider a simple SDR (software defined radio). The front end ADC captures a wide bandwidth, a filter selects a narrow chunk that you are interested in. Decimation is appropriate. The filter threw away the out of band signal that would get aliased on top of your signal if you didn't filter. -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
