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//Chapter 13 example 12
//------------------------------------------------------------------------------
clc;
clear;
// Given data
f = 23; // operating freq. of microwave link in Ghz
D = 10; // single hop path length in miles
a = 1; // topographic factor
b = 0.5; // climatic factor
DFM = 40; // dispersive fade margin
FFM = 30; // flat fade margin
// Calculations
CFM = -10*log10(10^(-FFM/10) + 10^(-DFM/10)); // composite fade margin
U = a*b*2.5*10^-6 *f*D^3 *10^(-CFM/10); // unavailability factor
U1 = U*525600; // outrage time in min per year
// Output
mprintf('Outrage time = %3.2f minutes per year',U1);
//------------------------------------------------------------------------------
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