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+//ANALOG AND DIGITAL COMMUNICATION
+//BY Dr.SANJAY SHARMA
+//CHAPTER 5
+//ANGLE MODULATION
+clear all;
+clc;
+printf("EXAMPLE 5.37(PAGENO 260)");
+
+//given
+// s(t) = 20*sin(6*10^8*t + 7*sin(1250*t))
+//comparing with standard eqn s(t) = A*sin(w_c*t + m_f*sin(w_m*t))
+//we get 
+w_c = 6*10^8//carrier angular frequency in rad/sec
+w_m = 1250//modulating angular frequency in rad/sec
+m_f = 7//modualation index
+A = 20//amplitude of modulated wave
+R = 100//resistance
+
+//calculations
+f_c = w_c/(2*%pi)//carrier frequency in hertz
+f_m = w_m/(2*%pi)//modulating frequency in hertz
+delta_f = m_f*f_m//frequency deviation
+P = (A/sqrt(2))^2/R//power dissipated
+
+//results
+printf("\n\ni.Carrier frequency  = %.2f Hz ",f_c);
+printf("\n\nii.Modulating frequency  = %.2f Hz ",f_m);
+printf("\n\niii.Modulation index = %.2f ",m_f);
+printf("\n\niv.Frequency deviation = %.2f Hz",delta_f);
+printf("\n\nv.Power dissipated by FM wave = %.2f W",P);