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: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10980322/ |
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| Summary: | 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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| ISSN: | 2169-3536 |