Hartley Transform
The equations for discrete Hartley transform and its inverse are:
H
(
f
)=
F
(
t
)
cas
(2
πft
/
N
)
(1)
and
X
(
t
) =
H
(
f
)
cas
(2
πft
/
N
)
(2)
where
cas
(2
πft
) = cos(2
πft
) + sin(2
πft
). These are similar to those for the discrete Fourier Transform.