S

Shiva Ram • 30.44K Points
Instructor I

Q. The power efficiency of the M ary PSK decreases because of the            

(A) freely packed constellation
(B) increment of bandwidth efficiency
(C) fixed null bandwidth
(D) densely packed constellation
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Explanation by: Shiva Ram
 bandwidth efficiency increases as the value of m increases. but at the same time, increasing m implies that the constellation is more densely packed. hence the power efficiency or noise tolerance is decreased.

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