[BC] 5.8 Ghz STL's

tosenkowsky@prodigy.net tosenkowsky
Wed Jun 7 06:49:20 CDT 2006


Read again: NLOS. You are correct about modulation schemes. In order
for there to be modulation, there must be a carrier to modulate. The
NLOS system employs groundwave propagation, not the more familiar
Line-Of-Sight that falls victim to Earth curvature, Fresnel Zone,
etc. The 7 modulation schemes are variations of Amplitude Modulation
with which we are all acquainted. The AM band depends on groundwave
propagation, therefore the NLOS is based on that mode. Snow and
rain actually enhance groundwave propagation, nor degrade it as
one might assume in the UHF/microwave band. The 99.99993 % figure
is taken from the new FCC groundwave curves for the 5.8 GHz band.

Tom Osenkowsky, CPBE


>7 modulation schemes or not, still doesn't explain how they will change 
>physics and how they will get any RF through snow/rain/fog/brimstone at 
>that distance.  Or (as it has been proven here many times) am I missing 
>something?
> They claim that it is because it is a new NLOS (non-line of site) 
> system with about 7 different modulation schemes.  Though my point to 
> point IS line of site.  Their study software shows 99.99993 %

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