# DFT - cyclic convolution

1. Nov 19, 2005

### Lila

Hey pple!
I've got a question abt DFTs.
If I know that g = h * f, and I'm given g and f (both as finite sequences), but have no information on h, how do I find h from g and f.
I know that G = HF (in frequency domain), and G = Dng , and same goes for F = Dnf, with Dn being the "Vandermonde matrix" (i think that's what its called ) and n = sequence length. So I assume from this, I can find H as H = [Dng x 1/n x inverse(Dn) x f ], right?
I thought this would be right since G = HF => H = G/F and to divide by F, I just move to the left hand side the inverse of F, right?
Please someone help me for I am very confused here.
Thanks sooo much!
L