Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems
This paper presents a novel approach for achieving high-capacity transmission utilizing sub-terahertz (THz) radio orbital angular momentum (OAM) multiplexing, specifically in scenarios where the radio link is susceptible to antenna misalignment. We focus on a radio OAM multiplexing system incorporat...
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| Format: | Article |
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10980322/ |
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| author | Norifumi Kamiya Masahiro Kawai Eisaku Sasaki |
| author_facet | Norifumi Kamiya Masahiro Kawai Eisaku Sasaki |
| author_sort | Norifumi Kamiya |
| collection | DOAJ |
| description | This paper presents a novel approach for achieving high-capacity transmission utilizing sub-terahertz (THz) radio orbital angular momentum (OAM) multiplexing, specifically in scenarios where the radio link is susceptible to antenna misalignment. We focus on a radio OAM multiplexing system incorporating uniform circular antenna arrays (UCAs) at both the transmitter and receiver. While it is established that UCA-based OAM multiplexing can significantly enhance transmission capacity, its performance is notably sensitive to antenna misalignment, leading to capacity degradation. To mitigate this issue, we propose a novel closed-loop OAM system featuring adaptive phase-shift control for transmission signals. We also introduce efficient methods for optimizing the phase shift. An experimental demonstration of the radio OAM system employing the proposed phase-shift control method is provided, showcasing its efficacy in compensating for the effects of misalignment. |
| format | Article |
| id | doaj-art-d13e8f6a69264ca48da6627f5e46f827 |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-d13e8f6a69264ca48da6627f5e46f8272025-08-20T03:53:16ZengIEEEIEEE Access2169-35362025-01-0113766547666410.1109/ACCESS.2025.356573810980322Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO SystemsNorifumi Kamiya0https://orcid.org/0000-0002-7424-1582Masahiro Kawai1Eisaku Sasaki2Advanced Network Research Laboratories, NEC Corporation, Kawasaki, Kanagawa, JapanWireless Network Department, NEC Platforms Ltd., Kawasaki, Kanagawa, JapanWireless Access Development Department, NEC Corporation, Kawasaki, Kanagawa, JapanThis paper presents a novel approach for achieving high-capacity transmission utilizing sub-terahertz (THz) radio orbital angular momentum (OAM) multiplexing, specifically in scenarios where the radio link is susceptible to antenna misalignment. We focus on a radio OAM multiplexing system incorporating uniform circular antenna arrays (UCAs) at both the transmitter and receiver. While it is established that UCA-based OAM multiplexing can significantly enhance transmission capacity, its performance is notably sensitive to antenna misalignment, leading to capacity degradation. To mitigate this issue, we propose a novel closed-loop OAM system featuring adaptive phase-shift control for transmission signals. We also introduce efficient methods for optimizing the phase shift. An experimental demonstration of the radio OAM system employing the proposed phase-shift control method is provided, showcasing its efficacy in compensating for the effects of misalignment.https://ieeexplore.ieee.org/document/10980322/Orbital angular momentum (OAM) multiplexingline-of-sight (LOS) MIMOsub-THz communicationsphase-shift controlbeam steering |
| spellingShingle | Norifumi Kamiya Masahiro Kawai Eisaku Sasaki Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems IEEE Access Orbital angular momentum (OAM) multiplexing line-of-sight (LOS) MIMO sub-THz communications phase-shift control beam steering |
| title | Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems |
| title_full | Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems |
| title_fullStr | Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems |
| title_full_unstemmed | Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems |
| title_short | Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems |
| title_sort | phase shift control for enhancing misalignment tolerance in uca based oam mimo systems |
| topic | Orbital angular momentum (OAM) multiplexing line-of-sight (LOS) MIMO sub-THz communications phase-shift control beam steering |
| url | https://ieeexplore.ieee.org/document/10980322/ |
| work_keys_str_mv | AT norifumikamiya phaseshiftcontrolforenhancingmisalignmenttoleranceinucabasedoammimosystems AT masahirokawai phaseshiftcontrolforenhancingmisalignmenttoleranceinucabasedoammimosystems AT eisakusasaki phaseshiftcontrolforenhancingmisalignmenttoleranceinucabasedoammimosystems |