A general theorem for degree-reduction of a digital BR function
Palghat P. Vaidyanathan · IEEE Transactions on Circuits and Systems · 1985
A general theorem is developed for the degree reduction of a bounded real (BR) digital filter transfer function, and is related to the extraction of a digital lossless two-pair from a BR function in such a manner that the remainder function is reduced order BR. The theorem finds applications in the synthesis of digital filter transfer functions in the form of a cascade of lossless two pairs.