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A study on radio wave propagation estimation and its visualization in a large metropolitan area

Research Project

Project/Area Number 19K04398
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21020:Communication and network engineering-related
Research InstitutionChuo University

Principal Investigator

SHIRAI Hiroshi  中央大学, 理工学部, 教授 (00196594)

Co-Investigator(Kenkyū-buntansha) 佐藤 亮一  新潟大学, 人文社会科学系, 教授 (00293184)
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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords電波伝搬推定 / 高周波解析 / 高周波漸近解法 / 回折界 / キルヒホッフ近似 / 物理光学近似 / Physical Optics / 高周波 / 漸近解法 / キルヒホッフ / Kirchhoff / 回折 / 電波伝搬予測 / 可視化 / 光線近似
Outline of Research at the Start

本研究は、高層建築物で囲まれた複雑な電波伝搬環境における電波伝搬の予測を高速に行い、その解析結果を可視化表示するシステムの構築を目的とする。このため、光線近似理論を用いて、地理情報や多層建築物の情報データベースを基に、建物内外の電波伝搬を高速に解析するプログラムを開発する。そして解析によって得られた結果を用いて、電波伝搬の様子を可視化するシステムを開発する。

Outline of Final Research Achievements

In this research, a fast analytical method has been devised to estimate radio wave scattering by walls of high-rise buildings in large cities and window openings in those walls. For this purpose, we considered that the Kirchhoff approximation (KA), one of the high-frequency asymptotic analysis method, is the most appropriate, and we confirmed the accuracy of the approximation and the calculation speed of the method by comparing the results with other solution methods that have already been obtained. As a result, it was shown that KA can be calculated very accurately when analyzing high-frequency scattering whose aperture is large compared to the wavelength. Next, based on the formulation results of the electromagnetic scattering analysis by a rectangular window on a thick conducting wall, the effect of the glass parameters, such as the thickness and the material was examined.

Academic Significance and Societal Importance of the Research Achievements

スマートフォンに代表される移動無線通信の急速な需要増加に伴い、複雑な都市環境における効率の良い通信基地局の配置や通信電波の正確な伝搬予測が望まれている。本研究では、高周波の電波の解析に有効な光線近似理論を用いて、都市部の地理情報や建築材料情報を組み込んだ多層建築物の構造情報データベースを基に、建物内外の電波伝搬を高速に解析するプログラムを開発し、高層建築物で囲まれた複雑な電波伝搬環境における電波伝搬の予測を高速に行い、その解析結果を可視化表示するシステムを構築できた。この成果は、今後の移動体基地局の設置や電波の不感地域の解消のために役立たせることができる。

Report

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

    (27 results)

All 2021 2020 2019

All Journal Article (15 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 13 results) Presentation (12 results) (of which Int'l Joint Research: 11 results,  Invited: 1 results)

  • [Journal Article] Electromagnetic Scattering Analysis from a Rectangular Hole in a Thick Conducting Screen2021

    • Author(s)
      Khanh Nam Nguyen, Hiroshi Shirai, and Hirohide Serizawa
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E104.C Issue: 4 Pages: 134-143

    • DOI

      10.1587/transele.2020REP0001

    • NAID

      130008014029

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2021-04-01
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] GO-Based Equivalent Current Formulation for Scattering from Circular Conducting Cylinders and Strips2021

    • Author(s)
      Ta Ngoc Quang、Shirai Hiroshi
    • Journal Title

      Proc. of 2021 International Conference on Electromagnetics and Advanced Applications

      Volume: 1 Pages: 038-038

    • DOI

      10.1109/iceaa52647.2021.9539677

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Extended Physical Optics Approximation for Electromagnetic Wave Scattering from Penetrable Objects2021

    • Author(s)
      SHIRAI Hiroshi
    • Journal Title

      Proc. of XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science

      Volume: 1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Uniform Asymptotic Solution for Dielectric Wedge Diffraction Based on Equivalent Currents2021

    • Author(s)
      NGUYEN Duc Minh, SHIRAI Hiroshi, KIM Se-Yun
    • Journal Title

      Proc. of XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science

      Volume: 1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Approximate Analysis of EM Wave Scattering From Two Cracks on a Ground Plane2021

    • Author(s)
      SATO Ryoichi, SHIRAI Hiroshi
    • Journal Title

      Proc. of 2020 ISAP International Symposium on Antennas and Propagation

      Volume: - Pages: 657-658

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Field Equivalence between Physical Optics and GO-Based Equivalent Current Methods for Scattering from Circular Conducting Cylinders2020

    • Author(s)
      TA Ngoc Quang, SHIRAI Hiroshi
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E103.C Issue: 9 Pages: 382-387

    • DOI

      10.1587/transele.2019ECP5048

    • NAID

      130007894655

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2020-09-01
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] High Frequency Diffraction by a Rectangular Hole in a Thick Conducting Screen -E Polarization Case-2020

    • Author(s)
      NGUYEN Nam Khanh, SHIRAI Hiroshi
    • Journal Title

      Proc. of 2020 IEEE International Symposium on Antennas and Propagation

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] TE Plane Wave Diffraction by Window Aperture on a Thick Conducting Wall2020

    • Author(s)
      NGUYEN Nam Khanh, SHIRAI Hiroshi
    • Journal Title

      TE Plane Wave Diffraction by WindowProc. of 2020 IEEE International Conference on Advanced Tecnologies for Communications

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] High Frequency Asymptotic Evaluation for Electromagnetic Scattering from a Circular Conducting Cylinder -E Polarization-2020

    • Author(s)
      TA Ngoc Quang, SHIRAI Hiroshi
    • Journal Title

      High Frequency Asymptotic Evaluation for Electromagnetic Scattering from a Circular ConductinProc. of 2020 International Conference on Communications and Electronics

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Uniform Asymptotic Solution For Conducting Wedge Diffraction Based On Physical Optics Current2020

    • Author(s)
      M. D. Nguyen and H. Shirai
    • Journal Title

      2020 電子情報通信学会 全国大会 講演論文集

      Volume: -

    • Related Report
      2019 Research-status Report
  • [Journal Article] High Frequency Diffraction by Rectangular Hole in a Thick Conducting Screen -H Polarization Case-2019

    • Author(s)
      K. N. Nguyen and H. Shirai
    • Journal Title

      Proc. of 2019 PhotonIcs & Electromagnetics Research Symposium

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] High Frequency Diffraction by Thick Loaded Conducting Slits -H Polarization Case-2019

    • Author(s)
      K. N. Nguyen and H. Shirai
    • Journal Title

      Proc. of 2019 IEEE International Symposium on Antennas and Propagation

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] High Frequency Asymptotic Evaluation of PO Integral for EM Scattering from PEC Circular Cylinder2019

    • Author(s)
      T. Q. Ngoc and H. Shirai
    • Journal Title

      Proc. of 2019 International Conference on Electromagnetics and Advanced Applications

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Fundamental Analysis of Electromagnetic Wave Scattering from Multi-layered Window Glass in Multi-frequency Band2019

    • Author(s)
      R. Sato and H. Shirai
    • Journal Title

      Proc. of 2019 International Conference on Electromagnetics and Advanced Applications

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 導体平板上の2つのクラックからの電磁波散乱に関する基礎研究2019

    • Author(s)
      佐藤 亮一,白井 宏
    • Journal Title

      電子情報通信学会 電磁界理論研究会,研究会資料

      Volume: EMT2019-49 Pages: 261-264

    • Related Report
      2019 Research-status Report
  • [Presentation] GO-Based Equivalent Current Formulation for Scattering from Circular Conducting Cylinders and Strips2021

    • Author(s)
      Ta Ngoc Quang, SHIRAI Hiroshi
    • Organizer
      2021 International Conference on Electromagnetics and Advanced Applications
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Extended Physical Optics Approximation for Electromagnetic Wave Scattering from Penetrable Objects2021

    • Author(s)
      SHIRAI Hiroshi
    • Organizer
      XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Uniform Asymptotic Solution for Dielectric Wedge Diffraction Based on Equivalent Currents2021

    • Author(s)
      NGUYEN Duc Minh, SHIRAI Hiroshi, KIM Se-Yun
    • Organizer
      XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Approximate Analysis of EM Wave Scattering from Two Cracks on a Ground Plane2021

    • Author(s)
      SATO Ryoichi, SHIRAI Hiroshi
    • Organizer
      2020 ISAP International Symposium on Antennas and Propagation
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] High Frequency Diffraction by a Rectangular Hole in a Thick Conducting Screen -E Polarization Case-2020

    • Author(s)
      NGUYEN Nam Khanh, SHIRAI Hiroshi
    • Organizer
      2020 IEEE International Symposium on Antennas and Propagation
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] TE Plane Wave Diffraction by Window Aperture on a Thick Conducting Wall2020

    • Author(s)
      NGUYEN Nam Khanh, SHIRAI Hiroshi
    • Organizer
      2020 IEEE International Conference on Advanced Tecnologies for Communications
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] High Frequency Asymptotic Evaluation for Electromagnetic Scattering from a Circular Conducting Cylinder -E Polarization-2020

    • Author(s)
      TA Ngoc Quang, SHIRAI Hiroshi
    • Organizer
      2020 International Conference on Communications and Electronics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] High Frequency Diffraction by Rectangular Hole in a Thick Conducting Screen -H Polarization Case-2019

    • Author(s)
      K. N. Nguyen and H. Shirai
    • Organizer
      2019 PhotonIcs & Electromagnetics Research Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] High Frequency Diffraction by Thick Loaded Conducting Slits -H Polarization Case-2019

    • Author(s)
      K. N. Nguyen and H. Shirai
    • Organizer
      2019 IEEE International Symposium on Antennas and Propagation
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] High Frequency Asymptotic Evaluation of PO Integral for EM Scattering from PEC Circular Cylinder2019

    • Author(s)
      T. Q. Ngoc and H. Shirai
    • Organizer
      2019 International Conference on Electromagnetics and Advanced Applications
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fundamental Analysis of Electromagnetic Wave Scattering from Multi-layered Window Glass in Multi-frequency Band2019

    • Author(s)
      Sato and H. Shirai
    • Organizer
      2019 International Conference on Electromagnetics and Advanced Applications
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 導体平板上の2つのクラックからの電磁波散乱に関する基礎研究2019

    • Author(s)
      佐藤 亮一,白井 宏
    • Organizer
      電子情報通信学会 電磁界理論研究会
    • Related Report
      2019 Research-status Report

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

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