遺伝的アルゴリズム,シミュレ-テッドアニ-リングを用いたFIR型ディジタルフィルタのARMA型ディジタルフィルタへの変換設計方法

概要

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In this paper, the method for reconstructing FIR digital filter into ARMA direct form digitalfilter based upon adaptive ARMA Four Line Lattice filter with the phase estimation is proposed. The phase estimation is performed by the combination of GA (Genetic Algorithm) and SA (Simulated Annealing) in addition to the spectrum estimation. In order to reduce the calculation cost that will be significant issue for the system implementation of digital filters into the products, it will be necessary to design ARMA digital filter. Introducing the phase estimation method, it contributes the possibility to provide optimum ARMA digital filters that is not only relatively lower coefficient sensitivity and better robustness, but also it will maintain all its desired characteristics that include the phase performance. Maintaining the phase characteristics is the unforgettable factor for the fields of the inverse filtering problem for any opportunities. We conduct the original cost function that will cooperate with GA and SA searching in order to realize the phase estimation. In this paper, experimental results are also discussed to confirm the performance of proposed method.
社団法人日本音響学会の論文