Gj. Groenewald et al., LEFT VERSUS RIGHT CANONICAL WEINER-HOPF FACTORIZATION AND REALIZATION, Integral equations and operator theory, 28(4), 1997, pp. 466-491
For an arbitrary rational matrix function. not necessarily analytic at
infinity, the existence of a right canonical Wiener-Hopf factorizatio
n is characterized in terms of a left canonical Wiener-Hopf factorizat
ion. Formulas for the factors in a right factorization are given in te
rms of the formulas for the factors in a given left factorization. hll
formulas are based on a special representation of a rational matrix f
unction involving a quintet of matrices.