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+//Page Number: 10.36
+//Example 10.20
+clc;
+//Given
+c=sqrt(2);
+A=sqrt(5);
+N0=1; //W/Hz
+
+d12sqr=4*A*A;
+
+//As for two equiprobables
+//Pe=Q(z)
+//where z=sqrt(d12^2)/(2*N0)
+z=sqrt((d12sqr)/(sqrt(2*N0)));
+Pe=(1/2)*erfc(z/1.414);
+disp(Pe,'Probabilty error:')