Ask
Login
0
2.5kviews
Let X(K) = {20, 0, -4+4j, 0, -4} is the 8 point DFT of a real valued sequence x(n)
written 9.0 years ago by gravatar for teamques10 teamques10 ★ 70k modified 3.8 years ago by gravatar for sagarkolekar sagarkolekar ★ 11k
  1. Find X(K) for K= 5, 6, 7. -
  2. Find the 8 point DFT P(K) such that - $p(n) = (-1)n \otimes x(n)$ Using DFT property. -
digital signal processing
ADD COMMENT EDIT
1 Answer
0
50views
written 9.0 years ago by gravatar for teamques10 teamques10 ★ 70k

  1. N=8

    For k=5, $X(5) = x*(8-5) \\ = x*(3) = 0$

    For k=6, $X(6) = x*(8-6) \\ = x*(2) = (-4-4j)$

    For k=7, $X(7) = x*(8-7) \\ = x*(1) = 0$

    $\therefore, X(5) = 0, X(6) = -4-4j, X(7) = 0$

    Result: X(K)={20, 0, -4+4j, 0, -4, 0, -4-4j, 0} …

Create a free account to keep reading this post.

and 3 others joined a min ago.

ADD COMMENT EDIT
Please log in to add an answer.