2021 Fiscal Year Final Research Report
A study on radio wave propagation estimation and its visualization in a large metropolitan area
| Project/Area Number |
19K04398
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21020:Communication and network engineering-related
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| Research Institution | Chuo University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
佐藤 亮一 新潟大学, 人文社会科学系, 教授 (00293184)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| 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 |
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| 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.
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| Free Research Field |
電磁波工学
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| 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。
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