繰り返し重み付き最小二乗法を用いた阻止域の複数要素が可変なFIRフィルタの準等リプル設計

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: 2015/06/01

タイトル(英語): Design of Quasi-Equiripple FIR Filters with Variable Multi-Factor in the Stopband Using Iterative Weighted Least Squares Method

著者名: 宮田　統馬（サレジオ工業高等専門学校），岡本　光平（新光電子（株）／東京理科大学），相川　直幸（東京理科大学）

著者名(英語): Toma Miyata (Salesian Polytechnic), Kohei Okamoto (SHINKO DENSHI CO., LTD./Tokyo University of Science), Naoyuki Aikawa (Tokyo University of Science)

キーワード: 直線位相可変FIRフィルタ，繰り返し重み付き最小二乗法，動的重量計測機，高速高精度計測　　variable linear-phase FIR filter，iterative weighted least squares method，checkweigher，high speed and high accuracy measurement

要約(英語): Automatically dynamic measurement systems to measure object weights are used in logistics and food industry, etc. The systems are composed of belt conveyor and road cell, and is called checkweigher. Checkweighers have a problem that noises of error factor change according to speed of belt conveyor and installation surrounding. As a result, variable filters are better suited for checkweighers to reduce the noises after installation. In this paper, we propose a design method of quasi-equiripple variable linear-phase FIR (Finite Impulse Response) filters using iterative weighted least squares method in the frequency domain. The proposed variable filter has some piecewise high attenuations in the stopband, and can change multi-factor in the stopband characteristics and some notch frequencies using variable parameters. In the proposed variable filter, filter coefficients are approximated by polynomial using polynomial coefficients and variable parameters. The number of the polynomial coefficients increases when variable parameters are the plural number or polynomial orders are high. Therefore, we also propose a reduction method of the polynomial coefficients. The usefulness of the proposed design method is verified through the examples.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.135 No.6 （2015） 特集：データからの知識発見とその応用

本誌掲載ページ: 671-678 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/135/6/135_671/_article/-char/ja/