On 10/24/2010 04:27 PM, Jorge Miguel wrote: > I will have a look at the white papers from that manufacturers. > From your words, I imagine that the noise generated by the ADC will > set a limit in the noise floor at the input of the ADC, isn´t it? Yes. The total signal power arriving at the A/D (signal+noise) must exceed the effective noise floor of the A/D by enough margin to allow "demodulation" of your signal of interest. Where "demodulation" is very loosely defined. Each modulation technique has its own SNR requirements. I do radio astronomy, where there's no demodulation, per se. In fact, most of the time my "signals" are *below* the total noise floor of the receiving system. But I have the very great advantage of being able to maximize bandwidth and integration time in order to "see" those below-the-noise-floor signals.
-- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
