Hi
I am a junior RF planner and just need
some guidance in a thought that a have. In a split
configuration microwave setup you have your ODU
up on the mast and your IDU down in a protected
housing right. Now if I want to calculate the thermal
noise I use
Nt = kTB
(k = Boltzmann, T =
temperature in kelvin and B spectrum bandwidth)
My problem, as the receiver sits in the IDU
should I use the IF bandwidth in the feeder as my
spectrum bandwidth or should I use the channel bandwidth
that is received by my antenna? Maybe I should use
a combination of both?
I figure you can't just
use the IF bandwidth as some thermal noise would
have already been added to the system by the amplification
of the antenna and ODU.
Does anybody have
some thoughts on this?
Thanks