An equiripple bandpass recursive digital filter with adjustable skirt selectivities
P. Thajchayapong, V. Suwatanapankul, F. Cheevasuvit · Proceedings of the IEEE · 1980
A method is proposed for the design of a recursive digital filter with equiripple passband magnitude response and exchangeable zeros at ωT = 0 and ωT = π rad, hence adjustable skirt selectivities. It employs the transform variables technique which is well known for numerical accuracy.