On Using a Genetic Algorithm in the Designing of Linear Digital Filters

Jacek Stelmach

doi:10.18778/0208-6018.346.07

Authors

Jacek Stelmach ETA Gliwice Sp. z o.o.

DOI:

https://doi.org/10.18778/0208-6018.346.07

Keywords:

digital filters, genetic algorithm, ARMA process

Abstract

Digital filters, either as filters with moving average (Finite Impulse Response) or autoregressive filters (Infinite Impulse Response), are widely used in noise suppression, signal processing or extracting information from data streams. Although well‑known theory allows for optimal parameter selection, there still exist such real applications where requirements limit the use of digital filters. One of the most important limitations is the response time delay caused by too many used lagged input signals. The method proposed in the article allows us to estimate filter parameters with a genetic algorithm, decreasing its delay but keeping the requirements important for the user (e.g.: attenuation). Transfer functions of such filters were compared with transfer functions of the most known classical filters.

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