Phase-Shift Control for Enhancing Misalignment Tolerance in UCA-Based OAM-MIMO Systems

IF 3.4 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Access Pub Date : 2025-04-30 DOI:10.1109/ACCESS.2025.3565738

Norifumi Kamiya;Masahiro Kawai;Eisaku Sasaki

引用次数: 0

Abstract

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.

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基于uca的OAM-MIMO系统的相移控制

本文提出了一种利用亚太赫兹（THz）无线电轨道角动量（OAM）多路复用实现高容量传输的新方法，特别是在无线电链路易受天线失调影响的情况下。我们的重点是在发射机和接收机上结合均匀圆形天线阵列（UCAs）的无线电OAM多路复用系统。虽然基于uca的OAM复用可以显著提高传输容量，但其性能对天线不对准非常敏感，从而导致容量下降。为了缓解这个问题，我们提出了一种新的闭环OAM系统，该系统具有传输信号的自适应相移控制。我们还介绍了优化相移的有效方法。最后给出了采用相移控制方法的无线电OAM系统的实验演示，验证了该方法对失调影响的补偿效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Access COMPUTER SCIENCE, INFORMATION SYSTEMSENGIN-ENGINEERING, ELECTRICAL & ELECTRONIC

CiteScore

9.80

自引率

7.70%

发文量

6673

审稿时长

6 weeks

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