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+//ANALOG AND DIGITAL COMMUNICATION
+//BY Dr.SANJAY SHARMA
+//CHAPTER 5
+//ANGLE MODULATION
+clear all;
+clc;
+printf("EXAMPLE 5.1(PAGENO 198)");
+
+//given
+t = [0:.1:10];//time period
+R = 10//resistance in ohms
+printf("\n\nv(t) = 12*cos(6*10^8*t + 5*sin(1250*t));");
+printf("\n\nv(t) = A*cos(w_c*t + m_f*sin(w_m*t))");
+//by comparing with standard 
+A = 12//amplitude voltage in volts
+w_c= 6*10^8//angular carrier frequency in rad/sec
+w_m = 1250//angular modulating frequency in rad/sec
+m_f = 5//modulation index
+
+//calculations
+f_c =  w_c/(2*%pi)//carrier frequency
+f_m = w_m/(2*%pi)//modulating frequency
+deltaf = m_f*f_m//maximum deviation
+V_rms = (A/sqrt(2))^2//rms volatage
+P = V_rms/R//power dissipatted
+
+//results
+printf("\n\n i. Carrier frequency = %.2f Hz",f_c);
+printf("\n\nii. Modulation frequency = %.2f Hz",f_m);
+printf("\n\niii. Modulation index = %.2f",m_f);
+printf("\n\niv.Maximum frequency deviation = %.2f Hz", deltaf);
+printf("\n\nv.Power dissipated = %.2f W ",P);