Question:

(a) For the bit stream 010011, sketch the waveforms for each of the code indicated.

Assume the following: the signal level for the previous bit for NRZI was a 1 and was positive; the most recent preceding 1 bit (AMI) had
a negative voltage; and the most recent preceding 0 bit (pseudoternary) had a negative voltage. (Let 0 be positive for NRZ-L)

(b) Describe fully how you can use a (11/7) Hamming code to:

(i) detect and;

(ii) correct by giving the correct transmitted character;

if an incorrect codeword representing character "K" is received: 

(ASCII value of "K" is 75)

(c) Describe the procedure known as byte stuffing. Explain why and when it is used and how it actually works.