[time-nuts] WWVB BPSK Receiver Project?

Peter Monta pmonta at gmail.com
Thu Mar 15 07:53:16 UTC 2012


>        I'm not clear how accurately one can resolve the phase transition
> in the new scheme, but I suspect probably unambiguously to 1 cycle of
> the 60 KHz... and from there is merely a function of how accurately one
> can resolve the phase of the 60 KHz.    This potentially can supply a
> much higher resolution time hack than the AM envelope.

I think the low transmitting-antenna bandwidth will prevent an
unambiguous identification of the exact cycle of phase inversion, just
as it smears out the AM transition from high power to low power.
Fitting a model to the signal's AM exponential decay (or PM
transition) would be better than a simple threshold, but at best it
might get down to 50 us territory (excluding the propagation delay and
iono uncertainties).

Cheers,
Peter



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