Orthogonal polynomial matrices on the unit circle
P. Delsarte, Yves V. Genin, Yves Kamp · IEEE Transactions on Circuits and Systems · 1978
This paper proposes a natural matrix extension of the classical theory of orthogonal polynomials on the unit circle introduced by Szego. As a result, orthogonal polynomial matrices appear to be a unifying concept in various mathematical aspects of circuit and system theory.