Computation of (G/T)¶
From the expression of the link budget, we get:
(GT)dB=(EbN0)dB−10⋅log10(EIRP⋅(λ4⋅π⋅R)2⋅1k⋅Rb⋅Lmarg)
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.