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Please use this identifier to cite or link to this item: http://hdl.handle.net/11133/894

Title: Short Time DFTヒルベルト変換にもちいられるプロトタイプフィルタの最適化
Other Titles: Short Time DFT ヒルベルト ヘンカン ニ モチイラレル プロトタイプ フィルタ ノ サイテキカ
On the Optimization of the Prototype Filter used in the Short Time DFT Hilbert Transformers
Authors: 岸, 政七
古賀, 裕規
KISHI, Masahichi
KOGA, Hiroki
Issue Date: 31-Mar-1992
Publisher: 愛知工業大学
Abstract: Superior characteristics of the short time DFT Hilbert transformer is yielded through employing ideal proto-type filter of infinite frame number. From practical application of view, it becomes to be important to reduce frame number of this proto-type filter and the processing amount in Short Time DFT Hilbert transformers. Optimization of proto-type filters are discussed in this paper to realize small frame number filters equal to the infinite frame number filter in the functional facilities via both non-linear programming and functional analysis. The proto-type filters are optimized in the meanings of minimizing the ripples both on the pass-and elimination-bands and of getting the sharpness of the mainlobe. Optimized proto-type filters are verified with analyzing output signals through Hilbert transformers, which employ these filters, to yield both exactly unity in amplitude and half π radian in phase-shifting even if shorten frame number filters being employed.
URI: http://hdl.handle.net/11133/894
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