[time-nuts] Carrier phase tracking

Peter Vince pvince at theiet.org
Tue Feb 20 04:58:26 EST 2007


>I don't wish to offend, but that is totally wrong.  Even if every
>satellite were on the exact same frequency, with the exact same
>doppler, and the exact same direction, you would still have no problem
>separating the carriers of the multiple satellites.  The reason is
>that the satellites do not transmit carrier.  Here is how:
>
>   Everybody here understands how the PN codes are tracked by
>despreading.  The despreading operation is multiplication, and when
>you multiply the PN code by the original signal you get a carrier,
>only from that one satellite.

Do you?  Or do you just get the modulation?

Sorry if I'm being naive, just trying to get my head around this thorny topic.

	Thanks,

		Peter



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