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Underwater acoustic communication in a multipath environment with the nonuniform Doppler shift

Research Project

Project/Area Number 18K13946
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 24020:Marine engineering-related
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

Deguchi Mitsuyasu  国立研究開発法人海洋研究開発機構, 研究プラットフォーム運用開発部門, 技術主任 (50725645)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Keywords水中音響通信 / マルチパス / ドップラーシフト / 信号処理 / 判定帰還型等化器 / 時間変動 / 非定常 / デジタル通信 / 音響通信 / 移動体通信 / チャネルレスポンス推定
Outline of Final Research Achievements

In the field of underwater acoustic communication of which a channel has specific challenges, demands of high data-rate or robust communication have been growing. In addition, expectations are rising for communication between mobile terminals, such as a small surface vessel and an unmanned underwater vehicle. In order to establish high data-rate or robust communication between mobile terminals, effects of the nonuniform Doppler shifts must be sufficiently suppressed. In this study, new processing against the nonuniform Doppler shifts of direct and multipath signals was proposed. Furthermore, through simulation and an at-sea experiment, it was confirmed that the processing effectively works.

Academic Significance and Societal Importance of the Research Achievements

本研究では、実運用に沿った環境下で非定常ドップラーシフトが通信に与える影響を評価し、さらに、その影響を抑制する手法を提案するとともに、シミュレーションと実験を用いてその動作を確認した点に学術的意義がある。また、小型船舶や水中無人機といった移動体間での音響通信に資する技術である事から、既存の海洋開発におけるIoT化に資するとともに、水中音響通信の確立に必要な条件の緩和に有効な技術であるため、海洋開発への新規参入を容易とする点に社会的意義がある。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Application of adaptive digital down-conversion to underwater acoustic communication with nonuniform Doppler shift2020

    • Author(s)
      Deguchi Mitsuyasu、Kida Yukihiro、Watanabe Yoshitaka、Shimura Takuya
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SK Pages: SKKF02-SKKF02

    • DOI

      10.35848/1347-4065/ab80db

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dependence of demodulation performance on symbol rate for underwater acoustic communication with nonuniform Doppler shift2019

    • Author(s)
      Deguchi Mitsuyasu、Kida Yukihiro、Watanabe Yoshitaka、Shimura Takuya
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SG Pages: SGGF02-SGGF02

    • DOI

      10.7567/1347-4065/ab0ad7

    • NAID

      210000156347

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 水中音響通信における適応デジタルダウンコンバージョン2020

    • Author(s)
      出口 充康, 樹田 行弘、志村 拓也
    • Organizer
      電子情報通信学会 無線通信システム研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 水中音響通信におけるドップラーシフト環境下のマルチパス波による影響のシンボルレート依存性2019

    • Author(s)
      出口 充康,樹田 行弘、渡邊 佳孝、志村 拓也
    • Organizer
      海洋音響学会2019年度研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Effects of multipath signal with the nonuniform Doppler shift on vertical underwater acoustic communication2019

    • Author(s)
      Mitsuyasu Deguchi, Yukihiro Kida, Takuya Shimura
    • Organizer
      The 5th underwater acoustics conference and exhibition UACE2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Adaptive symbol time adjustment for underwater acoustic communication with nonuniform Doppler shift2019

    • Author(s)
      Mitsuyasu Deguchi, Yukihiro Kida, Takuya Shimura
    • Organizer
      The 40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dependence of Demodulation Performance on Symbol Rate for Underwater Acoustic Communication with Nonuniform Doppler Shift2018

    • Author(s)
      Mitsuyasu Deguchi, Yukihiro Kida, Yoshitaka Watanabe, and Takuya Shimura
    • Organizer
      The 39th Symposium on UltraSonic Electronics
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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