Title :
An approximation algorithm for irregular-ripple filters
Author :
De Queiroz, Antônio C M ; Calôba, Luiz P.
Author_Institution :
Dept. of Electr. Eng., Rio de Janeiro, Brazil
Abstract :
A simple formulation is presented for the approximation of low-pass filters with specified number and level of ripples in the passband and stopband. The order of any finite attenuation or transmission zero can be specified as simple or double, and these zeros are not restricted to the jw axis. The method can be used to numerically obtain the characteristic functions of approximations ranging from the Butterworth to the elliptic ones
Keywords :
approximation theory; low-pass filters; Butterworth filters; approximation algorithm; characteristic functions; elliptic filters; finite attenuation; irregular-ripple filters; low-pass filters; passband; stopband; transmission zero; Approximation algorithms; Attenuation; Filtering theory; Filters; Frequency; H infinity control; Optimization methods; Passband;
Conference_Titel :
Telecommunications Symposium, 1990. ITS '90 Symposium Record., SBT/IEEE International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/ITS.1990.175641
