The method which has greater bandwidth efficiency is called as
A. Duobinary signalling
B. Polybinary signalling
C. Correlative coding
D. All of the mentioned
Answer:A
The method which has greater bandwidth efficiency is called as
A. Duobinary signalling B. Polybinary signalling C. Correlative coding D. All of the mentioned
Explanation: If more than three levels are introduced in duobinary signalling technique the bandwidth efficiency increases This method is called as polybinary signalling.