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//Chapter 7, Example 7.14, page 343
clc
//Initialisation
d=20 //distance in kM
po=0.02 //fading occurrence probability at 20 Km
d1=25 //distance in kM
d2=40 //distance in kM
fm1=30 //link in kM
fm2=35 //link in kM
fm3=40 //link in kM
tr=30*24*60
//Calculation
po1=po*(d1*d**-1)**3 //fading occurrence probability at 25 Km
po2=po*(d2/d)**3 //fading occurrence probability at 40 Km
pw=po*10**(-fm1*10**-1) //fade margin at 30
pw1=po1*10**(-fm2*10**-1) //fade margin at 35
pw2=po2*10**(-fm3/10) //fade margin at 40
u=pw+pw1+pw2 //total fade margin
to=u*tr //network outage time
//Results
printf("(1) Fading occurrence probability at 20 = %.2f",po)
printf("\n Fading occurrence probability at 25 = %.3f",po1)
printf("\n Fading occurrence probability at 40 = %.2f",po2)
printf("\n(2) Fade margin at 30 = %.1f x 10^-5",(pw*10**5))
printf("\n Fade margin at 35 = %.2f x 10^-5",(pw1*10**5))
printf("\n Fade margin at 40 = %.2f x 10^-5",(pw2*10**5))
printf("\n Total fade margin = %.2f x 10**-5",(u*10**5))
printf("\n(3) Network outage time , To = %.3f min per month",(to))
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