Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study
This paper introduces a novel Line-of-Sight (LoS) Multiple-Input Multiple-Output (MIMO) communication architecture leveraging non-traditional Orbital Angular Momentum (OAM) beams. Challenging the conventional paradigm of hollow-emitting OAM beams, this study presents an innovative OAM generator that...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/181041 |
| _version_ | 1826129410472804352 |
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| author | Zhao, Yufei Ma, Xiaoyan Guan, Yong Liang Liu, Yile Afkar Mohamed Ismail Liu, Xiaobei Yeo, Siew Yam Yuen, Chau |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Zhao, Yufei Ma, Xiaoyan Guan, Yong Liang Liu, Yile Afkar Mohamed Ismail Liu, Xiaobei Yeo, Siew Yam Yuen, Chau |
| author_sort | Zhao, Yufei |
| collection | NTU |
| description | This paper introduces a novel Line-of-Sight (LoS) Multiple-Input Multiple-Output (MIMO) communication architecture leveraging non-traditional Orbital Angular Momentum (OAM) beams. Challenging the conventional paradigm of hollow-emitting OAM beams, this study presents an innovative OAM generator that produces directional OAM beams without central energy voids, aligning their radiation patterns with those of conventional planar wave horn antennas. Within the main lobe of radiation patterns, the phase variation characteristics inherent to OAM beams are ingeniously maintained, linking different OAM modes to the linear wavefront variation gradients, thereby reducing channel correlation in LoS scenarios and significantly augmenting the channel capacity of LoS-MIMO frameworks. Empirical validations conducted through a meticulously designed LoS-MIMO experimental platform reveal significant improvements in channel correlation coefficients, communication stability, and Bit Error Rate (BER) compared to systems utilizing traditional planar wave antennas. The experiment results underscore the potential of the novel OAM-based system to improve current LoS-MIMO communication protocols, and offer both academic and engineering guidance for the construction of practical communication infrastructures. Beyond its immediate contributions, this paper underscores a pivotal shift in the field of communications, pointing out that traditional communication algorithms have primarily focused on baseband signal processing while often overlooking the electromagnetic characteristics of the physical world. This research highlights that, in addition to radiation patterns, the wavefront phase variations of traditional antennas represent a new degree-of-freedom that can be exploited. Consequently, future communication algorithms designed around reconfigurable electromagnetic wavefront properties hold the promise of ushering wireless communications into a new era. |
| first_indexed | 2025-03-09T15:05:17Z |
| format | Journal Article |
| id | ntu-10356/181041 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T15:05:17Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1810412025-03-07T15:45:28Z Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study Zhao, Yufei Ma, Xiaoyan Guan, Yong Liang Liu, Yile Afkar Mohamed Ismail Liu, Xiaobei Yeo, Siew Yam Yuen, Chau School of Electrical and Electronic Engineering Temasek Laboratories @ NTU Engineering Channel capacity Orbital angular momentum This paper introduces a novel Line-of-Sight (LoS) Multiple-Input Multiple-Output (MIMO) communication architecture leveraging non-traditional Orbital Angular Momentum (OAM) beams. Challenging the conventional paradigm of hollow-emitting OAM beams, this study presents an innovative OAM generator that produces directional OAM beams without central energy voids, aligning their radiation patterns with those of conventional planar wave horn antennas. Within the main lobe of radiation patterns, the phase variation characteristics inherent to OAM beams are ingeniously maintained, linking different OAM modes to the linear wavefront variation gradients, thereby reducing channel correlation in LoS scenarios and significantly augmenting the channel capacity of LoS-MIMO frameworks. Empirical validations conducted through a meticulously designed LoS-MIMO experimental platform reveal significant improvements in channel correlation coefficients, communication stability, and Bit Error Rate (BER) compared to systems utilizing traditional planar wave antennas. The experiment results underscore the potential of the novel OAM-based system to improve current LoS-MIMO communication protocols, and offer both academic and engineering guidance for the construction of practical communication infrastructures. Beyond its immediate contributions, this paper underscores a pivotal shift in the field of communications, pointing out that traditional communication algorithms have primarily focused on baseband signal processing while often overlooking the electromagnetic characteristics of the physical world. This research highlights that, in addition to radiation patterns, the wavefront phase variations of traditional antennas represent a new degree-of-freedom that can be exploited. Consequently, future communication algorithms designed around reconfigurable electromagnetic wavefront properties hold the promise of ushering wireless communications into a new era. Info-communications Media Development Authority (IMDA) Nanyang Technological University National Research Foundation (NRF) Submitted/Accepted version This work was supported by the National Research Foundation, Singapore and Infocomm Media Development Authority under its Future Communications Research & Development Programme, Grant No. FCP-NTU-RG-2022-011, and No. FCP-NTU-RG-2022-020. It was also supported by Temasek Laboratories @ NTU seed research projects, No. TLSP23-13 and No. TLSP24- 05. 2024-11-12T04:30:14Z 2024-11-12T04:30:14Z 2024 Journal Article Zhao, Y., Ma, X., Guan, Y. L., Liu, Y., Afkar Mohamed Ismail, Liu, X., Yeo, S. Y. & Yuen, C. (2024). Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study. IEEE Internet of Things Journal, 3449975-. https://dx.doi.org/10.1109/JIOT.2024.3449975 2327-4662 https://hdl.handle.net/10356/181041 10.1109/JIOT.2024.3449975 2-s2.0-85203464971 3449975 en FCP-NTU-RG-2022-011 FCP-NTU-RG-2022-020 TLSP23-13 TLSP24- 05 IEEE Internet of Things Journal © 2024 IEEE. All rights reserved. application/pdf |
| spellingShingle | Engineering Channel capacity Orbital angular momentum Zhao, Yufei Ma, Xiaoyan Guan, Yong Liang Liu, Yile Afkar Mohamed Ismail Liu, Xiaobei Yeo, Siew Yam Yuen, Chau Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study |
| title | Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study |
| title_full | Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study |
| title_fullStr | Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study |
| title_full_unstemmed | Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study |
| title_short | Near-orthogonal overlay communications in LoS channel enabled by novel OAM beams without central energy voids: an experimental study |
| title_sort | near orthogonal overlay communications in los channel enabled by novel oam beams without central energy voids an experimental study |
| topic | Engineering Channel capacity Orbital angular momentum |
| url | https://hdl.handle.net/10356/181041 |
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