Q.

What is the radius of the circle in M-ary PSK on which message points are equaly spaced?

A. √es
B. √eb
C. eb
D. es
Answer» A. √es
Explanation: the m-ary message points are equally spaced on a circle of radius √es centred at the origin. here es is energy per symbol. thus, mpsk is a constant envelope signal when no pulse shaping is used.
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