dyadup.m
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- function Q = dyadup(P)
- %DYADUP Dyadic upsampling for a Laurent polynomial.
- % Q = DYADUP(P) returns the Laurent polynomial Q obtained by
- % an "upsampling" on the Laurent polynomial P: Q(z) = P(z^2).
- % if P(z) = ... C(-1)*z^(-1) + C(0) + C(+1)*z^(+1) + ...
- % then Q(z) = ... C(-1)*z^(-2) + C(0) + C(+1)*z^(+2) + ...
- %
- % See also DYADDOWN, MODULATE, NEWVAR, REFLECT.
- % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 07-Feb-2003.
- % Last Revision 13-Jun-2003.
- % Copyright 1995-2004 The MathWorks, Inc.
- % $Revision: 1.1.6.2 $ $Date: 2004/04/13 00:38:36 $
- Q = newvar(P,'z^2');