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+clc

+//Chapter 3:Network noise and intermodulation distortion

+//example 3.8 page no 84

+//given

+NF=4//noise figure in dB

+B=3*10^3//bandwidth

+Rs=50//sourse resistance

+k=1.38*10^-23//Boltzmmans constant

+T=290//tempreture

+NFa=20//antenna noise figure

+NFr=10//receiver noise figure

+Fa=10^(NFa/10)//antenna noise factor

+Fr=10^(NFr/10)//receiver noise factor

+S_N=10//output signal to noise ratio

+Si_W=(S_N)*(Fa+Fr-1)*k*T*B//available input power in Watts

+Ei=sqrt(Si_W*4*Rs)//minimum detectable signal

+mprintf('the minimum detectable signal is %f uV',round(Ei*1e6*10)/10)

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