Finding ifft for a variable function

Hello

I want to find an ifft for (1+alpha*exp(-j*w*D)) where alpha and D are constants,w should be the frequency variable,

Ifft can't evaluate a function containing a variable though.. Is there anyway this could work?

Answer 1

[Matt J]

Why don't you just evaluate the function, as usual, at many sample points and take the ifft of that?

Answer 2

[Wayne King]

Or if you have the Symbolic Toolbox, you can use ifourier to obtain the inverse Fourier transform symbolically.