Decomposing signal (FFT)

Status
Not open for further replies.
C

ChepRidwan

Newbie level 5
Joined
Nov 20, 2005
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,356
I want to know the difference decomposing signal between time domain and frequency domain on FFT radix 2 algorithm?
 

hi,
Taking ifft of a frequency domain signal gives you a composite signal having all the frequencies which you specify in the frequency domain. Like if you make your signal in frequency domain as {0+i, 0,1,0,0,1,0, 0-i}, you will get a signal having two frequencies corresponding to the elements 0+i and 1. When you take the FFT of this signal, it will dwecompose the signal into its frequency domain constituents i.e. your frequency domain elements.
 

to shameem

I mean..
Example : N = 8
decomposing N at time domain

0 1 2 3 4 5 6 7
0 2 4 6 1 3 5 7
0 4 2 6 1 5 3 7

is true? (reverse bit!). Log2 N step = 3 step, we compute the process using butterfly...
now we enter to domain frequency, Is true?
How to decomposing sinyal on domain frequency, is like at time domain? or...
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…