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+//Chapter 7, Example 7.14, page 344
+clc
+//Initialisation
+ur=0.001                  //unavailability budget for hypothetical circuit
+d=50                      //path-length in km
+A=0.25                    //area conditions
+B=1                       //area conditions
+f=8                       //frequency in GHz
+
+
+//Calculation
+pw=ur*(d*(d*d)**-1)             //deep fading occurrence probability
+po=6*10**-7*A*B*f*(d**3)        //fading occurrence probability of desirable link
+FM=-log10(pw/po)*10        //fade margin
+
+//Results
+printf("Fade margin = %.1f dB",FM)