# Tag Info

Remember that the Fourier transform and the inverse Fourier transform are the conjugate of each other (possibly scaled by a constant), and that the convolution theorem holds for the inverse transform as well as for the direct transform. If the spectrum of $s(t)$ is $S(\omega)$, the PSD of $s(t)$ is $|S(\omega)|^2$. By the convolution theorem you know that ...