[Hidden-tech] WiredWest fiberoptic broadband

[ussailis at shaysnet.com]

The issue with trees, etc is known as "multipath." It represents signals
arriving from many directions into your antenna. The many directions are
caused by reflections from leaves, trees, hills, etc.

Multipath gets worse as frequency increases. 

Everyone who drives and listens to an FM radio has experienced it: You are
listing to a interesting program say you stop at a light. The signal is
distorted, & garbled. That is a multipath null (where the sum of the
various signal directions results in a very reduced, or null, signal
level). You inch forward a wee, the signal & interesting program is back.
You moved out from the multipath null.

One problem with wireless broadband is the antennas are fixed, while the
mutipath null moves about because the trees, etc move about. This results
in the null moving about. Since you can't easily move the antenna, you
can't control it.

Wireless broadband in the clear works well. Thru the trees doesn't work so
well. Thru rocks (ie hills) it doesn't work at all. 

This is another problem we face here in W.MA. Many "access points" would be
required to service few customers because of the hills. Each of these
access points would require a transmitter / receiver and antenna on a
tower. Some folks don't like that because they think (wrongly) that it
lowers their property value. This is the NIMBY aspect of it all. In some
ways the politics are more difficult to overcome than the engineering. 



Jim Ussailis

jim at nationalwireless.com




Original Message:
-----------------
From: Reva Reck reva at revareck.com
Date: Wed, 14 Apr 2010 12:17:24 -0400
To: Hidden-discuss at lists.hidden-tech.net
Subject: Re: [Hidden-tech] WiredWest fiberoptic broadband


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