気象用フェーズドアレイレーダにおける最小二乗平均誤差法を用いたクラッタエコー低減の観測的検討

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2014/04/01

タイトル(英語): Minimum Mean Square Error Method on Observation Result of Phased Array Weather Radar

著者名: 円尾　晃一（大阪大学大学院工学研究科），嶋村　重治（大阪大学大学院工学研究科），吉川　栄一（宇宙航空研究開発機構），吉田　智（国土交通省気象研究所），牛尾　知雄（大阪大学大学院工学研究科），水谷　文彦（（株）東芝），佐藤　晋介（（独）情報通信研究機構）

著者名(英語): Kouichi Maruo (Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University), Shigeharu Shimamura (Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University), Eiichi Yoshikawa (Japan Aerospace eXploration Agency), Satoru Yoshida (Meteorological Research Institute), Tomoo Ushio (Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University), Fumihiko Mizutani (Toshiba Corporation), Shinsuke Satoh (National Institute of Information and Communications Technology)

キーワード: 気象レーダ，シビア現象，最小二乗平均誤差法　　weather radar，severe phenomena，minimum mean square error method

要約(英語): We have been developing the Phased Array Weather Radar (PAR) which detects small scale phenomena such as tornadoes and downbursts. PAR is installed on the 13th floor rooftop of a building in Suita Campus, Osaka University, Osaka, Japan. In this paper, we compare Beam Former method (BF), which is a conventional method in Digital Beam Forming signal processing of array antenna, with Minimum Mean Square Error method (MMSE), which is our proposed method, and discuss simulation results and observation results estimated by each method. In BF, antenna pattern is uniform and unique in the radar system, and its sidelobe level is high. As a result, if there are obstacles, for example high building, or very heavy rain area, the observation results of array antenna are imprecision in the region near them. In contrast, we can turn the null-point to interference wave direction at the same time we turn the mainlobe to the desired signal direction in MMSE. As a result of estimating observation results by each method and comparing each result, we can reduce the influence of clutter by almost 20dBZ.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.134 No.4 （2014） 特集：平成25年基礎・材料・共通部門大会

本誌掲載ページ: 197-203 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/ieejfms/134/4/134_197/_article/-char/ja/