Dave
A couple of comments numbers of folks on Time-nuts have suggested the same
types of approaches. Though outside of an armchair discussion not much
happens. So I believe that what you say is reasonable. Jut remember lots of
the country has poor reception so that really makes life hard.
It was ab
Hi,
I am have thinking / tinkering / planning a wwvb receiver for longer
than I am willing to admit!! It seems to me that one could take a
ferrite loop, JFET buffer, ADC and a small microprocessor to get down to
baseband - say 20 Hz complex sampling rate - and then output on a serial
port
Great thread.
Bob in the d-psk-r thats exactly what I am doing is flipping a switch on
the incoming signal.
That normalizes it. However in its current approach it is random as either
0 or 180 out always. No attempt has been made to determine 0. But it does
run the phase tracking rcvrs fine. That sa
Hi
I believe the "lowest cost" approach is to take the RF and run it through an
simple switch. The switch either has a 0 degree or a 180 degree phase shift.
Drive the control of the switch with a computer generated track of the known
modulation format. Let the computer get time via NTP and just
Here are a few demodulated frames of WWVB's new BPSK bits:
0011101101000 01101 0(0)001100111(0)011011011(0)1010110 00 0 000 00 0
0011101101000 00100 0(1)001100111(1)011011011(1)1010111 00 0 000 00 0
0011101101000 01000 0(0)001100111(0)011011011(0)1011000 00 0 000 00 0
The fields are d
