Hi Tom, Thanks for your thoughts. I had looked at your helpful page when I started researching the effects of averaging. Currently, I’m experimenting with the dual receivers in the SDR using cross-correlation to reduce the noise floor.
Kevin > On Jul 30, 2016, at 5:08 PM, Tom Van Baak <t...@leapsecond.com> wrote: > >> SDRs sample at high rates. The slowest the USRP N2x0 can sample is just >> under 200Ksps. > > Hi Kevin, > > I don't have an easy answer for you. BobC / BruceG / MagnusD / JohnM / > EnricoR can shed light on this. But I support your effort to figure out how > to obtain real truth from a massive oversampled data set. > > If you feel uneasy that ADEV statistics might lie, see: > http://leapsecond.com/pages/adev-avg/ > > ADEV is always a tricky, since the measurement bandwidth is not always > specified, or how that bandwidth is implemented. Both the front-end h/w > design and any embedded s/w manipulation of raw data will distort (bias) the > statistics. Distortion itself is not a show-stopper, as long as you can > properly model it and back it out. But it seems the challenge is knowing how > valid the model is, and if model itself depends on the noise type. > > /tvb > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
