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+//ANALOG AND DIGITAL COMMUNICATION

+//BY Dr.SANJAY SHARMA

+//CHAPTER 11

+//Information Theory

+clear all;

+clc;

+printf("EXAMPLE 11.13(PAGENO 495)");

+//given

+t_dot = .2//duration of dot symbol

+t_dash = .6//duration of dash symbol

+t_space = .2//time between the symbols

+//wkt sum of the probability is 1 i.e P_dot + P_dash = 1 hence

+//P_dot = 2*P_dash weget 

+P_dot = 2/3//probality of dot symbol

+P_dash = 1/3//probality of dash symbol

+

+//calculations 

+H_X = -P_dot*log2(P_dot)-P_dash*log2(P_dash);//entropy

+T_s = P_dot*t_dot + P_dash*t_dash +t_space;//average time per symbol

+r = 1/T_s;//average symbol rate 

+R = r*H_X;//average information rate of the telegraph sourece

+

+//result

+printf("\n\ni.The average information rate of the telegraph source = %.4f bits/seconds",R);