環境雑音下の近接3ch観測信号に対する複素ICAを前処理とする音響測距

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2021/01/01

タイトル(英語): Acoustic Distance Measurement Using Complex ICA as Pre-processing for Adjacent 3ch Observations under Environmental Noise

著者名: 田井　一（近畿大学 生物理工学部），篠原　寿広（近畿大学 生物理工学部），上保　徹志（近畿大学 生物理工学部），中迫　昇（近畿大学 生物理工学部）

著者名(英語): Hajime Tai (Faculty of Biology-Oriented Sc. & Tech., Kindai University), Toshihiro Shinohara (Faculty of Biology-Oriented Sc. & Tech., Kindai University), Tetsuji Uebo (Faculty of Biology-Oriented Sc. & Tech., Kindai University), Noboru Nakasako (Faculty

キーワード: 音響測距，近接3ch観測，距離スペクトル，複素ICA，クロススペクトル　　acoustic distance measurement，adjacent 3ch observations，range spectrum，complex ICA，cross-spectrum

要約(英語): Under ideal conditions with low noise, the acoustic distance measurement (ADM) method using the cross-spectrum for adjacent 2ch observations shows sufficient distance estimation performance. Increasing noise will deteriorate the distance estimation performance. To reduce noise, even if complex ICA is applied to adjacent 2ch noisy observations, sufficient separation performance for distance measurement cannot be exhibited, because the microphones are too close. Thus, if the ADM method using the cross-spectrum is applied to the separated signals of the adjacent 2ch noisy observations, an incorrect distance near 0 m is estimated because of the effect of measurement system. Therefore, by increasing the number of microphones (which increases information and can be expected to improve the separation performance), and applying complex ICA to improve the separation performance, ADM using the cross-spectrum for the new separation signals is proposed. This method enables us to obtain distance estimation that eliminates both environmental noise and the effect of the measurement system. The validity of the proposed method is also verified with the experiment of the actual distance measurement. As a result, it was found that the distance 1 m to the target can be measured under the noise of SNR (Signal to Noise Ratio) -10 dB.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.141 No.1 （2021） 特集：電子回路関連技術

本誌掲載ページ: 61-67 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/141/1/141_61/_article/-char/ja/