What is the real part of the N point DFT XR(k) of a complex valued sequence x(n)?

Question

TuteeHUB · Accepted Answer

None of the mentioned

TuteeHUB · Answer

(  sum_{n=0}^{N-1} [x_R (n) cos u2061  frac{2 kn}{N}   x_I (n) sin u2061  frac{2 kn}{N}]  )

TuteeHUB · Answer

(  sum_{n=0}^{N-1} [x_R (n) sin u2061  frac{2 kn}{N} + x_I (n) cos u2061  frac{2 kn}{N}]  )

TuteeHUB · Answer

(  sum_{n=0}^{N-1} [x_R (n) cos u2061  frac{2 kn}{N} + x_I (n) sin u2061  frac{2 kn}{N}]  )

TuteeHUB · Answer

None of the mentioned

1.	What is the real part of the N point DFT XR(k) of a complex valued sequence x(n)?
A.	( sum_{n=0}^{N-1} [x_R (n) cos u2061 frac{2 kn}{N} x_I (n) sin u2061 frac{2 kn}{N}] )
B.	( sum_{n=0}^{N-1} [x_R (n) sin u2061 frac{2 kn}{N} + x_I (n) cos u2061 frac{2 kn}{N}] )
C.	( sum_{n=0}^{N-1} [x_R (n) cos u2061 frac{2 kn}{N} + x_I (n) sin u2061 frac{2 kn}{N}] )
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion