onto a set
of vectors other than the coordinate set. This can be viewed
as a change of coordinates in
. In the case of the DFT,
the new vectors will be chosen to be sampled complex sinusoids.
What's more interesting is when we project a signal
onto a set
of vectors other than the coordinate set. This can be viewed
as a change of coordinates in
. In the case of the DFT,
the new vectors will be chosen to be sampled complex sinusoids.
