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Old December 8th 08, 08:36 PM posted to rec.radio.amateur.antenna,rec.radio.amateur.homebrew
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Posts: 1,336
Default Antenna dimensions?

On Mon, 08 Dec 2008 11:35:12 -0800, John Smith
wrote:

You see millions of cell phones; You see a LOT of problems?


Oh yes, I certainly do see problems. They're well hidden and
mitigated in various ways. For example, if the error rate climbs, the
adaptive tx power control cranks up the power on both the handset and
the cell site end. If it persists, you get disconnected. Rather than
have the user sound like they're talking while gargling ball bearings,
the cell site just pulls the plug. Incidentally, the tx power control
algorithm is rather messy as it has to handle different data types, at
different rates, all while doing its best not to drain the handset
battery. One the cell site end, it's no better as the power
consumption of a typical cell site is non-trivial.

Problems? Well:
http://www.roughlydrafted.com/2008/08/28/the-inside-deets-on-iphone-202-and-dropped-calls/
Hmmm... power control algorithm again.

Todays typical cell phones run about 150mw max average power output
(according to the FCC ID data). Some are even less. None are
anywhere near the 600mw legal maximum. If they could, you would have
a dead battery within about an hour. (Do the math).

Back to wi-fi and your setup. Sure, you'll have fairly good
preformance with a high power setup. 14 times the usual power is
bound to do some good. However, I suspect your neighbors are not so
thrilled and will probably also be shopping for higher power hardware.
It will be like an arms race, where the biggest bomb allegedly wins.
Dealing with mutual interference is no fun, especially with only 3
available non-overlapping channels.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
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