ELA, Volume 10, pp. 240-256, November 2003, abstract.
J-Spectral Factorization for Rational Matrix
Functions with Alternative Realization
by
Gilbert J. Groenewald and Mark A. Petersen
In this paper, recent results by Petersen and Ran on
the J-spectral factorization problem to rational matrix
functions with constant signature that are not necessarily
analytic at infinity are extended. In particular, a full
parametrization of all \tilde{J}-spectral factors that have
the same pole pair as a given square J-spectral factor is
given. In this case a special realization involving a quintet
of matrices is used.