SFACT(G)

NAME
sfact - discrete spectral factorization

CALLING SEQUENCE
[F]=sfact(P)

PARAMETERS

P   : real polynomial matrix

DESCRIPTION
Finds a spectral factor of P. P is a polynomial matrix assumed such that each root of P has a mirror image w.r.t the unit circle.

returns a Hurwitz (stable) polynomial matrix such that

P = F(z)* F(1/z) *z^n

For scalar polynomials a specific algorithm is implemented.
Algorithms are from Kucera's book.

SEE ALSO
fspec, fspecg.