Q.

In polybinary signalling method the present bit of binary sequence is algebraically added with              number of previous bits.

A. j
B. 2j
C. j+2
D. j-2
Answer» D. j-2
Explanation: in polybinary signalling method the present binary digit of the sequence is formed from the modulo-2 addition of the j-2 preceding digits of the sequence and the present digit.
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