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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Main Authors: Norifumi Kamiya, Masahiro Kawai, Eisaku Sasaki
Format: Article
Language:English
Published: IEEE 2025-01-01
Series:IEEE Access
Subjects:
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/
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AT masahirokawai phaseshiftcontrolforenhancingmisalignmenttoleranceinucabasedoammimosystems
AT eisakusasaki phaseshiftcontrolforenhancingmisalignmenttoleranceinucabasedoammimosystems