How to convert an equation from frequency to time domain using inverse Fourier

[wsws909]

Hello for all

i have project about voice recognition .

and ge on t the equlation from some voice in the frequency domain for ex:

10*cos(2*pi*t*f+angle)

q)Is I can convert this equlation to time domine by use invers fourier??

plase help me!!!

 

[kronos2k3]

Re: invers fourier !!!!!

10*cos(2*pi*t*f+angle) The equation is in domain of the time.

2*pi*f : is the Angular frequency.

t: is the time

angle: is the phase

An equation in domain of the frequency is:

F(w)=(T/2)*{sen[(w-w0)*T/2]/[(w-w0)*T/2] +sen[(w+w0)*T/2]/[(w-w0)*T/2]}

Is the Fourier transform of Sen(w0*t)

Regards

 

[wsws909]

Re: invers fourier !!!!!

hi my friend :

the quastion in other methode

what the methode to convert the equation from frequency domainto time domine?

and Is the invers fourier can that?

thank you

 

[kronos2k3]

Re: invers fourier !!!!!

The methode is IFFT (Inverse Fast Fourier Transform) but its implementation is complicated. You can try with MathLAB by explample or Mathematica 5.0. I dont know the algorithm in C or some computer languaje.

F(w) Spectral Fuction ---->IFFT----> F(t) Time domain

I dont know more... sorry.

Regards from Argentina!