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High resolution beamforming for phased array weather radar using an adaptive signal processing

Research Project

Project/Area Number 19K14997
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21030:Measurement engineering-related
Research InstitutionThe University of Electro-Communications

Principal Investigator

KIKUCHI HIROSHI  電気通信大学, 宇宙・電磁環境研究センター, 助教 (40783105)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords降雨観測 / 気象レーダ / フェーズドアレイレーダ / 適応信号処理 / 圧縮センシング / ディジタルビームフォーミング / 高分解能化 / レーダ / 高解像度化 / ビームフォーミング / 高空間分解能
Outline of Research at the Start

本課題で提案する技術は,次世代の気象レーダとして期待される大型の気象用フェーズドアレイレーダへの適用を目的とし,遠距離観測においても高解像度を維持した降雨観測が可能となり,従来の気象レーダと比して高速・高精度な降雨観測が可能となる.更にクラッタエコーや強い降雨による疑似エコーの抑圧など副次的な効果も期待できる.本課題では,高解像度化を可能とする新たなディジタルビームフォーミング手法を提案し,その実用性を考慮した信号処理アルゴリズムの開発を行う.本研究が達成されれば静止気象衛星搭載型レーダなどへの技術移転が期待できる.

Outline of Final Research Achievements

Phased array weather radar currently in operation observes three-dimensional rainfall distribution by mechanical scanning in the azimuth direction and electronic scanning in the elevation direction. A digital beam formation (DBF) is used for electron scanning. Currently, the Fourier beamformer is used in operation, however the spatial resolution of this method is determined by the geometric antenna shape such as the aperture diameter or the number of elements. Therefore, we aim to improve the spatial resolution by developing a digital beam formation method that applies adaptive signal processing. Specifically, we propose the least squares error (MMSE) method and Capon method as methods that can adaptively suppress the antenna gain, and the beam formation method that uses compressed sensing technology as the beam formation method that achieves high resolution.

Academic Significance and Societal Importance of the Research Achievements

過去数年間で内閣府の激甚災害の指定を受けた多くは,気象現象による災害である.その多くは台風・豪雨など,降雨を起因とした土砂災害や洪水による被害であり,広域かつ高密度な降雨観測システムの構築が社会的背景として,早急かつ非常に重要である.所望の降雨観測システムの構築にC帯の気象レーダは観測範囲が数百kmであり,日本の国土を考慮するとその開発は重要な要素である.特に上空の高密度観測のためには,C帯気象レーダのフェーズドアレイ(PAWR)化技術の開発が早急に求められている.本研究成果は大型のPAWRに応用可能であり,開発上のボトルネックを解決する技術として応用可能であることを示した.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Compressive Sensing to Reduce the Number of Elements in a Linear Antenna Array With a Phased Array Weather Radar2022

    • Author(s)
      Kikuchi Hiroshi、Hobara Yasuhide、Ushio Tomoo
    • Journal Title

      IEEE Transactions on Geoscience and Remote Sensing

      Volume: 60 Pages: 1-10

    • DOI

      10.1109/tgrs.2022.3152998

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Validation of X-band multi-parameter phased array weather radar by comparing data from Doppler weather radar with a parabolic dish antenna2021

    • Author(s)
      Asai Keitaro、Kikuchi Hiroshi、Ushio Tomoo、Hobara Yasuhide
    • Journal Title

      Journal of Atmospheric and Oceanic Technology

      Volume: 38(9) Pages: 1561-1570

    • DOI

      10.1175/jtech-d-20-0213.1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Clutter Reduction for Phased-Array Weather Radar Using Diagonal Capon Beamforming With Neural Networks2020

    • Author(s)
      Kikuchi H., Yoshikawa E., Ushio T., Hobara Y.
    • Journal Title

      IEEE Geoscience and Remote Sensing Letters

      Volume: 17 Issue: 12 Pages: 2065-2069

    • DOI

      10.1109/lgrs.2019.2962558

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] High temporal resolution observations of Precipitation cores with Dual polarized phased array weather radar2021

    • Author(s)
      H. Kikuchi,K. Oikawa, K. Nakamura, S. Uchida, T. Ushio, Y. Hobara
    • Organizer
      URSI General Assembly and Scientific Symposium 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Initial results of Hydrometeor Classification with X-band Dual-Polarized Phased Array Weather Radar2021

    • Author(s)
      K. Oikawa, H. Kikuchi,K. Nakamura, T. Ushio, Y. Hobara
    • Organizer
      URSI General Assembly and Scientific Symposium 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparing the X-band multi-parameter phased array weather radar with a Doppler weather radar using a parabolic dish antenna2021

    • Author(s)
      K. Asai,H. Kikuchi,T. Ushio, Y. Hobara
    • Organizer
      URSI General Assembly and Scientific Symposium 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 気象用二重偏波フェーズドアレイ気象レーダと LF 帯雷放電標定装置を用いた夏季積乱雲の観測2021

    • Author(s)
      菊池博史,及川夏依,中村佳敬,吉川栄一,森本健志,牛尾知雄,芳原容英
    • Organizer
      第100回日本大気電気学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マルチパラメータフェーズドアレイ気象レーダを用いた3次元降水コアトラッキング手法の検討2021

    • Author(s)
      浅井啓太郎,菊池博史,芳原容英,牛尾知雄
    • Organizer
      JpGU Symposium 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] LF帯3次元雷放電標定装置と二重偏波フェーズドアレイ気象レーダを用いた夏季積乱雲の観測事例2021

    • Author(s)
      菊池博史,亀井悠平,中村佳敬,吉川栄一,森本健志,牛尾知雄,芳原容英
    • Organizer
      JpGU Symposium 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 気象用二重偏波フェーズドアレイレーダを用いた高時間分解能降雨観測2020

    • Author(s)
      菊池博史,及川夏衣,中村賢人,牛尾知雄,芳原容英
    • Organizer
      JpGU Symposium 2020
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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