2021 Fiscal Year Final Research Report
Research on devices for communication and sensing exploiting spatial eigenmodes
Project/Area Number |
19K04387
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 21020:Communication and network engineering-related
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Research Institution | The University of Electro-Communications |
Principal Investigator |
Saitou Akira 電気通信大学, 先端ワイヤレス・コミュニケーション研究センター, 客員教授 (80536920)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 情報通信工学 / アンテナ理論 / MIMO / 軌道角運動量 |
Outline of Final Research Achievements |
Research on devices for multiplexing communication and more detailed sensing was carried out by exploiting spatial eigenmodes. For OAM communication, signal to interference ratio was improved, where port directions of loop antennas were optimized for short-range communication and configuration of paraboloids were optimized for long-range communication. For sensing application, received currents by loop antennas were analytically derived, and a procedure of the back-annotation was examined. The order and degree for the spatial eigenmodes are the magnetic quantum number (m) and orbital angular momentum quantum number(l). The OAM communication exploits only the eigenmodes for the magnetic quantum number. In this research, eigenmode unique both for l and m is synthesized by the current distribution on the spherical array. The current distribution to radiate the eigenmode is analytically derived, and the eigenmodes are shown to be accurately synthesized by numerical calculation.
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Free Research Field |
通信工学
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Academic Significance and Societal Importance of the Research Achievements |
高度情報社会で要請される通信の高速化やセンサーの取得情報量増大のためには、周波数帯域の増大が有効であるものの、周波数は貴重で有限な資源であるので、有効利用が重要である。独立な通信路は使用モード数に比例するので、nモードを使用すると周波数利用効率はn倍になり、大幅な周波数利用効率の向上が期待できる。またセンシングでも複数のモードの応答の違いを活用することで、得られる情報量の大幅な増大が期待できる。
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