I Continious FT of a rectangle is real valued but DFT of it is not?

  • Thread starter truva
  • Start date
18
1
Continious FT of a rectangle is real valued but DFT of it is not!?

Continious Fourier Transform of a rectangle with amplitude of 1 between [-u,u] is a real valued function (u is a positive number). Actually it is a sinc function.

However when I use discrete Fourier Transform (fft) I obtain complex numbers. I know they are complex conjugates but according to the formulas of continious and discrete versions of the transformation, the only difference should have been the dt factor. Am I missing something?
 
7,726
4,388
The DFT returns both amplitude and phase information.
 

Related Threads for: Continious FT of a rectangle is real valued but DFT of it is not?

Replies
5
Views
4K
  • Last Post
Replies
17
Views
16K
Replies
4
Views
1K
  • Last Post
Replies
11
Views
5K
Replies
3
Views
4K
  • Last Post
Replies
5
Views
2K
Replies
4
Views
2K
Replies
2
Views
5K

Hot Threads

Recent Insights

Top