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# Entropy in Signal communication (Engineering) watch

An alphabet consists of the letters A, B, C, D. For transmission each letter is coded into a sequence of two binary (on-off) pulses. The A is represented by 00, the B by 01, the C by 10 and the D by 11. Each individual pulse interval is 5 msec.

(i) Calculate the average rate of transmission of information if the different letters are equally likely to occur.

(ii) The probability of occurrence of each letter is respectively P(A) = 1/5, P(B) = ¼, P(C) = ¼, P(D) = 3/10. Find the average rate of transmission of information in bits per second.

(i)

(ii)

Are those the right answers and is my method correct?

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Updated: May 17, 2013
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