What is the variance of the output DFT coefficients |X(k)|?
A. 1/N
B. 1/2N
C. 1/3N
D. 1/4N
Answer:A
What is the variance of the output DFT coefficients |X(k)|?
A. 1/N B. 1/2N C. 1/3N D. 1/4N
Explanation: We know that the variance of the signal sequence is (2/N)2/12=1/(3N2)