Title :
Design of reference filters for wave digital filters with Tchebycheff approximation in pass- and stop-band
Author :
Owenier, Klaus A.
Author_Institution :
Dept. of Electr. Eng., Ruhr Univ. of Bochum, West Germany
Abstract :
Reference filters for wave digital filters may include unit elements and gyro elements. In general, no closed-form solutions exist for the simultaneous Chebyshev approximation of the ideal response of zero loss in the passband and constant positive loss in the stopband. An exchange algorithm that leads to nearly optimal solutions by using a classical approximation method for generalized polynomials is described. Results obtained with the algorithm are presented
Keywords :
Chebyshev approximation; low-pass filters; wave digital filters; Chebyshev approximation; Tchebycheff approximation; classical approximation method; generalized polynomials; gyro elements; passband; reference filters; stopband; unit elements; wave digital filters; Approximation algorithms; Approximation methods; Attenuation; Closed-form solution; Digital filters; Frequency; Passband; Poles and zeros; Polynomials; Timing;
Conference_Titel :
Circuits and Systems, 1989., Proceedings of the 32nd Midwest Symposium on
Conference_Location :
Champaign, IL
DOI :
10.1109/MWSCAS.1989.102027
