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Low-cost acoustic indoor positioning method for smartphones using installed speakers

Research Project

Project/Area Number 20K23313
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 1001:Information science, computer engineering, and related fields
Research InstitutionHokkaido University

Principal Investigator

Nakamura Masanari  北海道大学, 情報科学研究院, 助教 (80878306)

Project Period (FY) 2020-09-11 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords屋内測位 / 音響測位 / 識別 / 非可聴音 / トラッキング
Outline of Research at the Start

屋内でのスマートフォンの位置は,複数のスピーカから送信した非可聴音をスマートフォンの内蔵マイクで受信することで推定できる.放送用の既設同報スピーカを用いる場合,各スピーカから同一の非可聴音が送信されるため,受信信号毎の送信元スピーカの特定が課題となる.本研究では,スマートフォン移動時の信号の受信時刻・受信強度の変化等を用いた送信元特定方式を開発することで,既設同報スピーカを用いた屋内測位手法の確立を目指す.

Outline of Final Research Achievements

We proposed a 3D localization method using a single speaker and a single microphone. Our proposed method estimates the direction of the microphone based on the knowledge that the spectral amplitude of a speaker in each direction is different. The distance between the speaker and microphone is estimated based on the received amplitude value. The 3D location of the microphone is calculated from the estimated azimuth, elevation, and distance values. We conducted real-environment experiments at multiple locations and confirmed that the 90-percentile localization error was 0.48 m.

Academic Significance and Societal Importance of the Research Achievements

本研究により,放送用のボックススピーカが放射方向毎で非対称かつ特有な周波数特性を持つことが明らかとなった.これは,従来困難と考えられていた単一のスピーカによるモノラルマイクロフォンの測位を可能とする重要な発見であるといえる.またこれにより,音声放送を目的として屋内環境へ設置されているスピーカでモノラルマイクロフォンの測位が可能となることから,音響信号を用いた屋内測位技術の普及につながるものと考えている.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Simultaneous Localization and Communication Method using Short-time and Narrow-band Dual-carrier Acoustic Signals2021

    • Author(s)
      Nakamura, M., Hashizume, H., Sugimoto, M.
    • Journal Title

      IEEE Sensors Journal

      Volume: 22 Issue: 6 Pages: 5163-5172

    • DOI

      10.1109/jsen.2021.3107849

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Short-time Spot Communication using COTS Stereo Speaker2021

    • Author(s)
      Nakamura, M., Hashizume, H., Sugimoto, M.
    • Journal Title

      IEEE Sensors Journal

      Volume: 22 Issue: 6 Pages: 5001-5010

    • DOI

      10.1109/jsen.2021.3074979

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 単一のスピーカーを用いたモノラルマイクロフォンの屋内3次元測位手法2022

    • Author(s)
      舟田優太,中村将成,村上弘晃,渡邉拓貴,橋爪宏達,杉本雅則
    • Organizer
      IoTワークショップ
    • Related Report
      2022 Annual Research Report
  • [Presentation] Short-Time Noise Suppression Method with Multiple Signals for Received Time Estimation2022

    • Author(s)
      Masanari Nakamura, Akira Tanaka, Hiromichi Hashizume, Masanori Sugimoto
    • Organizer
      2022 International Conference on Indoor Positioning and Indoor Navigation (IPIN)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] モバイルデバイスを用いた複数音声同時放送手法の基礎検討2022

    • Author(s)
      川原寛喜,中村将成,田中章
    • Organizer
      第37回信号処理シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Short-Time and Adaptive Controllable Spot Communication Using COTS Speaker2021

    • Author(s)
      Masanari Nakamura、Shoma Yamasaki、Hiromichi Hashizume、Masanori Sugimoto
    • Organizer
      2021 International Conference on Indoor Positioning and Indoor Navigation (IPIN)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Indoor Localization Method For a Microphone Using a Single Speaker2021

    • Author(s)
      Masanari Nakamura、Kento Fujimoto、Hiroaki Murakami、Hiromichi Hashizume、Masanori Sugimoto
    • Organizer
      2021 International Conference on Indoor Positioning and Indoor Navigation (IPIN)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Simultaneous Localization and Communication Methods Using Short-time and Narrow-band Acoustic Signals2020

    • Author(s)
      Masanari Nakamura, Hiromichi Hashizume, Masanori Sugimoto
    • Organizer
      SENSORDEVICES 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-09-29   Modified: 2024-01-30  

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