RE: SeattleWireless Node Fundraiser

Yeah, the noise floor sucks. Sometimes single digit SNR's are not
uncommon.  But its not bad to the point where its unusable, and there
are some creative solutions to this issue that do not require investment
into a phased array.

The most simple way to mitigate this is low gain in the sky, high gain
on the ground.  Typically, there is not much 2.4GHz trash radiating from
the sky, especially when using tight beamwidths.  That way, the only way
you could raise the tower radio is with a pretty strong beam.  The last
thing you need is to throw up a  high gain omni, sucking in trash from
all directions, and providing doughnut antenna patterns on the ground.

But even in the worst of signal conditions, WiFi to the level of what we
need will work just fine.  Especially for the price point.

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Bill 
> Vodall WA7NWP
> Sent: Wednesday, December 07, 2005 4:57 PM
> To: SeattleWireless Development List
> Subject: Re: SeattleWireless Node Fundraiser
> 
> 
> Ok.  If nobody else is going to ask I'll do it.    The noise floor on 
> the 900 MHz and 2.4 Ghz bands, probably less so at 5 Ghz, at 
> 150' above 
> metro Seattle is bound to be incredible.   I'm sure Matt and Casey 
> et.al. have ideas on how to deal with this -- an antenna 
> pattern with highly reduced downtilt so it has a gain to 
> Kirkland but a loss locally?
> 
> Bill
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