R

Ranjeet • 34.60K Points
Instructor I 

Q. Which of the following is the ratio of signal energy per bit to noise power spectral density?

(A) bandwidth efficiency
(B) spectral density
(C) power efficiency
(D) power density
Correct : Option (C)

Explanation: 
 power efficiency is often expressed as the ratio of signal energy per bit to noise power spectral density required at the receiver input for a certain probability of error. power efficiency is a measure of how favourably the trade-off between fidelity and signal power is made.

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