How to calculate inverse fourier transform of a sinc wave?

the sinc wave signal form is this X(ω)= 2*sinc(ω*T/pi);

[nanren888]

Google

inverse fourier transform of a sinc

==> https://www.quora.com/What-is-the-inverse-of-a-Fourier-transform-of-a-sinc-function-and-the-square-of-a-sinc-function

Numerically?

Sample it, that is generate samples at equally-spaced T values, for a given omega.

omega = 1.0

tMax = 100.0;

tt = linspace(-tMax,tMax,1024).';

s = 2*sinc(omega*tt/pi);

sif = ifft(s);

plot(abs(sif));

grid('on');

You might want to try for different tMax values