Title :
Design of linear-phase digital filters on frequency unequal sample
Author :
Weixi, Zhang ; Li, Zhang
Author_Institution :
Dept of EIE Changzhou, Teachers Coll. of Technol. Jiangsu, Changzhou, China
Abstract :
In this paper, a method and principle for designing linear-phase digital IIR filter based on linear-phase FIR filter is presented. First, a linear-phase digital FIR filter is designed by using unequal sampling theory in the frequency domain. Then in order to satisfy the specialty of the given filter, the amount and frequency positions of these sampling can be simply, directly and easily adjusted while the amount of sampling in time domain does not change. And then a linear-phase digital IIR filter that has the same amplitude with the above-mentioned FIR filter can be obtained by using model reduction based on the impulse-response GRAM matrix.
Keywords :
IIR filters; digital filters; frequency-domain synthesis; linear phase filters; matrix algebra; reduced order systems; frequency unequal sample; impulse-response GRAM matrix; linear-phase FIR filter; linear-phase digital IIR filter design; model reduction; time-domain sampling; Computer science; Digital filters; Educational institutions; Finite impulse response filter; Frequency domain analysis; IIR filters; Intelligent control; Linear matrix inequalities; Reduced order systems; Sampling methods;
Conference_Titel :
Intelligent Control and Automation, 2002. Proceedings of the 4th World Congress on
Print_ISBN :
0-7803-7268-9
DOI :
10.1109/WCICA.2002.1021484
