uplinkbd.m

卫星链路的计算

function SNR = uplinkbd()
% this function perform satellite uplink budget

ESTrPower = 35;      % transmission power of earth station, dBW.
ESTrLoss = -1;       % loss of transmission earth station, dB.
ESTrGain = 55;       % antenna gain of transmission earth station, dB.
AtmoLoss = 0;        % loss of atmosphere, dB.
SpaceLoss = -200;    % path loss through free space, dB.
SatReGain = 20;      % receiving antenna gain of satellite, dB.
SatReLoss = -1;      % receiving antenna loss of satellite, dB.
InBackoff = 0;       % TWTA input backoff, -dB.
SatRePower = ESTrPower+ESTrLoss+ESTrGain+AtmoLoss+SpaceLoss+SatReGain+SatReLoss+InBackoff;
                     % satellite receiving power, dBW.
                  
NoiseTp = 290;      % System Noise Temperature, Kelvin.fit with that in book if 290K
Bandwidth = 36e+6;   % bandwidth, Hz
k = 1.38054e-23;
NoisePower = 10*log10(k*NoiseTp*Bandwidth);

RainLoss = -2;       % loss brought by rain

SNR = SatRePower-NoisePower+RainLoss;
                     % signal to noise ratio