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+//Chapter 13 example 11
+//------------------------------------------------------------------------------
+clc;
+clear;
+// Given data
+DFM1    = 50;       // dispersive fade margin
+FFM     = 30;       // flat fade margin
+DFM2    = 40;       // dispersive fade margin
+
+// Calculations
+CFM1    = -10*log10(10^(-FFM/10) + 10^(-DFM1/10));
+CFM2    = -10*log10(10^(-FFM/10) + 10^(-DFM2/10));
+d_CFM   = CFM1 -CFM2;
+
+// Output
+mprintf('CFM increases by %3.2f dB for a 10 dB increase in DFM',d_CFM);
+//------------------------------------------------------------------------------