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Computation of (G/T)

From the expression of the link budget, we get:

(GT)dB=(EbN0)dB10log10(EIRP(λ4πR)21kRbLmarg)

With Lmarg the only unknown which has to be evaluated in order to compute (G/T).

An accurate evaluation of the margin can be tricky and is not the aim of this project. Then we just roughly evaluated it:
  • Depointing of the antennas: Ldep= 3dB + 3dB=6 dB
  • Non-ideal demodulator: Ldem= 3 dB
  • Atmosphere attenuation (clear sky conditions): Lprop= 1.5 dB
  • Interferences: Lint= 1.5 dB

Then, we took Lmarg= 12 dB. However, the value of the margin can easily be modified for the simulations presented in "Simulations and results" if needed.