[Milsurplus] Even Worse

[Dave Maples]

All: CDMA and iDEN sites required GPS for very precise timing (they make use
of the edge of the 1 pulse-per-second signal), as well as frequency control.
Some operators use Time Delay of Arrival (TDOA) techniques to estimate
locations of subscribers, but others use GPS receivers in the subscriber
units themselves.

Thanks,
Dave WB4FUR
-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net]On Behalf Of
revcom at wbsnet.org
Sent: Monday, July 05, 2010 12:38 AM
To: sdaitch at kuw.ibb.gov
Cc: sdaitch at kuw.ibb.gov; jfor at quik.com; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Even Worse


About all Cellular and PCS sites have GPS locked systems to provide very
accurate frequency control as well as location "tagging" of users.


Rod
KØEQH
>
> Many digital communications systems have GPS related time bases, I can
> guess only to eliminate digital jitter in recovering the synch timing from
> an incoming data signal.
>


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