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Old November 5th 05, 06:53 AM
Jim
 
Posts: n/a
Default common phase DDS?

wrote in message
oups.com...
Well actually, the project I had in mind was to take the 60 khz WWVB
signal and use diode harmonic multipliers to create a clock in the
gigahertz range. I would then use this clock as the input to a DDS
system. I could use the GPS to calculate lightspeed delay between
the VFO and the WWVB to determine compensating phase lag.

This could be good for synchronizing the transmit and receive ends of a
digital communication, improving the signal to noise ratio.

The Eternal Squire



I think you'd have a difficult problem with the variable phase due to
multipath causing shifting path length between both ends of the digital
communication.

That is why systems may use time based coherancy for data start and stop
times, and so on, but do not bother to try for radio carrier frequency phase
coherant systems.


Jim
N6BIU