Thread: DTFT Fourier transforms - help

Hi all ,
I Have a function x(t) with Fourier transform X(W)=PI(w/10pi) .
Also ,I'm given x[n]=x(n/7.5) ,a discrete signal .

I need to find the DTFT of x[n] ( meaning X(Ω) ) .
how can I do that with basic transform table of DTFT ?

thanks

Originally Posted by new guy

Hi all ,
I Have a function x(t) with Fourier transform X(W)=PI(w/10pi) .
Also ,I'm given x[n]=x(n/7.5) ,a discrete signal .

I need to find the DTFT of x[n] ( meaning X(Ω) ) .
how can I do that with basic transform table of DTFT ?

thanks

Sorry but exactly what do you mean by:

x[n]=x(n/7.5)

you just seem to have defined the discrete signal at (certain) fractional times?

Also, why have you posted this in the Mathematical software area (there may be a reason so I won't move it to where it belongs just yet)?

CB