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// Example no B.3
// To determine average output thermal noise power
// Page no. 614
clc;
clear all;
// Given data
T0=300; // Ambient room temperature in K
Fsys=8; // Noise figure of the system
Tant=290; // Effective temperature of antenna in K
K=1.38*10^-23; // Boltzmann's constant in J/K
B=30000; // Effective bandwidth in Hz
Te=(Fsys-1)*T0; // Effective noise temperature in K
Ttotal=Tant+Te; // Overall system noise temperature in K
// To determine average output thermal noise power
Pn=(1+(Ttotal/T0))*K*T0*B; // Average output thermal noise power in W
Pn=10*log10(Pn/(10^-3)); // Average output thermal noise power in dBm
// Displaying the result in command window
printf('\n Average output thermal noise power = %0.1f dBm',Pn);
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