A detailed description of the Fourier transform ( FT ) has waited until now, when you have a better appreciation of why it is needed.
A Fourier transform is an operation which converts functions from time to frequency domains.
An inverse Fourier transform ( IFT ) converts from the frequency domain to the time domain.
preview:
http://www.cis.rit.edu/htbooks/nmr/chap-5/chap-5.htm
3/29/2004
