Excuse my pop-up into this topic, just let me try to complete: you cross-correlate and obtain the most probable samples and then do your phase noise process on those samples. The cross-correlation is only a filter, a preprocessor for the samples. Am I on the right way?
On Fri, Aug 3, 2012 at 1:31 AM, Magnus Danielson <[email protected] > wrote: > Hi Sylvain, > > On 08/02/2012 11:24 PM, Sylvain Munaut wrote: > >> Hi Magnus, >> >> Thanks a lot for the concise and very clean explanation. >> > > You are welcome! > > The cross-correlation part between the two signal was clear enough in >> my head but I didn't really see how it would achieve much gain. I >> didn't think about averaging many resulting spectrum while they're >> still complex (and not just the amplitudes ... ). I assume that the >> cross correlation of the two measurement makes the phase of several >> consecutive measurement "align" so that the main signal accumulates >> over many averages while the noise is just averaged out. >> > > Because they correlate, they add up, because the noise does not correlate, > it flattens out. > > You should look up what is written by NIST on this technique. They have a > nice online archive. > > They also demoed it on the NIST seminar. > > Cheers, > Magnus > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
