Title :
A technique for reduction of uncertain FIR filters
Author :
Lim, A.G. ; Sreeram, V. ; Zeheb, E.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Western Australia, Crawley, WA, Australia
Abstract :
In this paper, an algorithm for designing an IIR filter from a given uncertain FIR filter is proposed. An approach to properly assign the uncertainties in the FIR polynomial transfer function, to two parts of its factorization, is cleverly used. The resulting approximated IIR filter is inherently stable. The method proposed is in the time domain, based on the LSI approximation. An example of reducing a 16th order interval FIR filter to a 4th order numerator order over a 2nd order denominator order IIR filter is presented to illustrate the design method.
Keywords :
FIR filters; IIR filters; circuit simulation; circuit stability; digital filters; least squares approximations; network synthesis; polynomial approximation; reduced order systems; time-domain synthesis; transfer functions; FIR digital filter; FIR polynomial transfer function uncertainty assignment; LSI approximation; approximated IIR filter; denominator order filter; filter order interval; filter stability; least squares inverse approximation; numerator order filter; polynomial transfer function factorization; time domain synthesis; uncertain FIR filter order reduction; Algorithm design and analysis; Design engineering; Digital filters; Finite impulse response filter; IIR filters; Large scale integration; Least squares approximation; Polynomials; Road transportation; Uncertainty;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1206180
