The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Uma nova abordagem para projetar filtros digitais IIR variáveis usando uma cascata de N filtros individuais idênticos de qualquer ordem n é proposto neste artigo. Primeiro, o método de aproximação para especificações do filtro passa-baixa é delineado, depois as limitações gerais do novo método são investigadas e uma fórmula compacta é derivada. A seguir, as limitações das principais aproximações canônicas (Butterworth, Chebyshev e Elliptic) são investigadas e comparadas e obtidas expressões convenientes para projeto e avaliação. Novas seções de filtros de primeira e segunda ordem, permitindo um ajuste muito fácil da frequência de corte através do recálculo e reprogramação de um único valor de coeficiente multiplicador, são desenvolvidas e as estratégias de projeto e ajuste para filtros passa-alta, passa-banda e fim-de-banda são propostas. Finalmente, exemplos de design são dados e a superioridade do novo método em comparação com outros métodos conhecidos é demonstrada experimentalmente.
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Georgi STOYANOV, Ivan UZUNOV, Masayuki KAWAMATA, "Design and Realization of Variable IIR Digital Filters as a Cascade of Identical Subfilters" in IEICE TRANSACTIONS on Fundamentals,
vol. E84-A, no. 8, pp. 1831-1839, August 2001, doi: .
Abstract: A new approach to design variable IIR digital filters by using a cascade of N identical individual filters of any order n is proposed in this paper. First, the approximation method for lowpass filter specifications is outlined, then the general limitations of the new method are investigated and a compact formula is derived. Next, the limitations for the main canonic approximations (Butterworth, Chebyshev and Elliptic) are investigated and compared and convenient expressions for design and evaluation are obtained. New first- and second-order filter sections, permitting very easy tuning of the cutoff frequency by recalculating and reprogramming of a single multiplier coefficient value, are developed and the design and tuning strategies for highpass, bandpass and bandstop filters are proposed. Finally design examples are given and the sound superiority of the new method compared to other known is demonstrated experimentally.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e84-a_8_1831/_p
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@ARTICLE{e84-a_8_1831,
author={Georgi STOYANOV, Ivan UZUNOV, Masayuki KAWAMATA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Design and Realization of Variable IIR Digital Filters as a Cascade of Identical Subfilters},
year={2001},
volume={E84-A},
number={8},
pages={1831-1839},
abstract={A new approach to design variable IIR digital filters by using a cascade of N identical individual filters of any order n is proposed in this paper. First, the approximation method for lowpass filter specifications is outlined, then the general limitations of the new method are investigated and a compact formula is derived. Next, the limitations for the main canonic approximations (Butterworth, Chebyshev and Elliptic) are investigated and compared and convenient expressions for design and evaluation are obtained. New first- and second-order filter sections, permitting very easy tuning of the cutoff frequency by recalculating and reprogramming of a single multiplier coefficient value, are developed and the design and tuning strategies for highpass, bandpass and bandstop filters are proposed. Finally design examples are given and the sound superiority of the new method compared to other known is demonstrated experimentally.},
keywords={},
doi={},
ISSN={},
month={August},}
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TY - JOUR
TI - Design and Realization of Variable IIR Digital Filters as a Cascade of Identical Subfilters
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1831
EP - 1839
AU - Georgi STOYANOV
AU - Ivan UZUNOV
AU - Masayuki KAWAMATA
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E84-A
IS - 8
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - August 2001
AB - A new approach to design variable IIR digital filters by using a cascade of N identical individual filters of any order n is proposed in this paper. First, the approximation method for lowpass filter specifications is outlined, then the general limitations of the new method are investigated and a compact formula is derived. Next, the limitations for the main canonic approximations (Butterworth, Chebyshev and Elliptic) are investigated and compared and convenient expressions for design and evaluation are obtained. New first- and second-order filter sections, permitting very easy tuning of the cutoff frequency by recalculating and reprogramming of a single multiplier coefficient value, are developed and the design and tuning strategies for highpass, bandpass and bandstop filters are proposed. Finally design examples are given and the sound superiority of the new method compared to other known is demonstrated experimentally.
ER -