On the design of recursive digital filters
Kishan Shenoi, Madihally J. Narasimha, A. M. Peterson · IEEE Transactions on Circuits and Systems · 1976
A change of variables is described which transforms the problem of designing a recursive digital filter to that of approximation by a ratio of polynomials on a finite interval. Some analytic techniqueS for the design of low-pass filters are presented, illustrating the use of the tfransformation. Also considered are methods for the design of phase equalizers.