Recursive coefficient computation for deriving filters from lowpass prototypes using rational transformations
Jean Le Bihan · Electronics Letters · 1993
A recursive algorithm is presented for calculating the coefficients of a filter derived from a lowpass prototype transfer function when a rational transformation is applied to the parameter. The method is general, valid for prototypes having both poles and zeros, and provides excellent accuracy. It is applicable in the continuous or discrete domain and also for designing digital filters from analogue filters.