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Katsunori MIZUNO Masahichi KISHI
Decimation filter plays significant roles in the short time DFT Hilbert Transformers. The longer window introduces the sharper cut-off characteristics in contrast with delay of increase response. Therefore, the decimation filters with sharp cut-off response have been keenly investigated to reduce the window length. This paper shows a new decimation filter optimized by the steepest gradient method in the mean of minimizing maximum ripple on the passband.