George wrote:
Almost every wisp today is using 2.4 to reach the customer and 5 gig
for infrastructure and high end customers. Are you saying that wisps
have to move off the existing spectrum and replace their equipment?
Here in Atlanta you can't use 2.4 unless it is indoors. In fact, you
have to get out 90+ miles before the noise floor drops off enough to
even think about it. We tested Tropos units here, which are high powered
and have good receive sensitivity, but we still need each node to be
spaced anywhere from 0.125 to 0.25 miles apart to provide decent indoor
penetration. With a higher powered CPE we can separate the nodes further
apart, but in the end it still requires too many nodes. I say too many
because of the bandwidth loss experienced by using single radio mesh
nodes. At least here, you can't use multi-radio nodes because the only
Wi-Fi channel that doesn't have an impossible noise floor is channel 1
and there are too many trees to use something other than 2.4 for
intra-mesh distribution.
-Matt
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