Title :
A new estimation formula for minimum filter length of optimum FIR low-pass digital filters
Author :
Ichige, Koichi ; Ueda, Kiyoshi ; Iwaki, Mamoru ; Ishii, Rokuya
Author_Institution :
Tsukuba Univ., Ibaraki, Japan
Abstract :
This paper presents an accurate estimation formula for the minimum filter length of optimum (the minimax criterion based) FIR low-pass digital filters when ripples in passband and those in stopband are identical. Two estimation formulae have been already proposed, but they have some problems which lead to wrong estimation. Discussing the problems based on both experimental results and theoretical considerations, we propose a new estimation formula. The accuracy of the proposed formula, is evaluated for some design examples and compared with that of the conventional formulae
Keywords :
FIR filters; digital filters; filtering theory; low-pass filters; minimax techniques; FIR low-pass digital filter; estimation formula; minimax criterion; minimum filter length; optimum FIR filters; passband ripples; stopband ripples; Cutoff frequency; Design optimization; Digital filters; Educational institutions; Finite impulse response filter; Information filtering; Information filters; Low pass filters; Minimax techniques; Passband;
Conference_Titel :
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on
Print_ISBN :
0-7803-3676-3
DOI :
10.1109/ICICS.1997.652198
