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Math Help - DTFT Fourier transforms - help

  1. #1
    Newbie
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    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
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by new guy View Post
    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
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