Continuing with the four line codes considered in Problem, identify the line codes that have minimum average energy and those that do not. Compare your answers with the observations made on these line codes.

Problem:-
In Chapter 6 we described line codes for pulse-code modulation. Referring to the material presented therein, formulate the signal constellations for the following line codes:

a. unipolar nonreturn-to-zero code

b. polar nonreturn-to-zero code

c. unipolar return-to-zero code

d. manchester code.