Inverse complex cepstrum
x = icceps(xhat,nd)
icceps only works on real data.
x = icceps(xhat,nd) returns
the inverse complex cepstrum of the real data sequence
nd samples of delay. If
cceps(x), then the amount of delay
that was added to
x was the element of
to π radians.
 Oppenheim, A.V., and R.W. Schafer, Discrete-Time Signal Processing, Prentice-Hall, 1989.