Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications

Doohwan LEE; Hirofumi SASAKI; Hiroyuki FUKUMOTO; Ken HIRAGA; Tadao NAKAGAWA

doi:10.1587/transcom.2016SCI0001

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Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications

Doohwan LEE, Hirofumi SASAKI, Hiroyuki FUKUMOTO, Ken HIRAGA, Tadao NAKAGAWA

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This paper explores the potential of orbital angular momentum (OAM) multiplexing as a means to enable high-speed wireless transmission. OAM is a physical property of electro-magnetic waves that are characterized by a helical phase front in the propagation direction. Since the characteristic can be used to create multiple orthogonal channels, wireless transmission using OAM can enhance the wireless transmission rate. Comparisons with other wireless transmission technologies clarify that OAM multiplexing is particularly promising for point-to-point wireless transmission. We also clarify three major issues in OAM multiplexing: beam divergence, mode-dependent performance degradation, and reception (Rx) signal-to-noise-ratio (SNR) reduction. To mitigate mode-dependent performance degradation we first present a simple but practical Rx antenna design method. Exploiting the fact that there are specific location sets with phase differences of 90 or 180 degrees, the method allows each OAM mode to be received at its high SNR region. We also introduce two methods to address the Rx SNR reduction issue by exploiting the property of a Gaussian beam generated by multiple uniform circular arrays and by using a dielectric lens antenna. We confirm the feasibility of OAM multiplexing in a proof of concept experiment at 5.2 GHz. The effectiveness of the proposed Rx antenna design method is validated by computer simulations that use experimentally measured values. The two new Rx SNR enhancement methods are validated by computer simulations using wireless transmission at 60 GHz.

Publication: IEICE TRANSACTIONS on Communications Vol.E100-B No.7 pp.1044-1063

Publication Date: 2017/07/01

Publicized: 2017/01/12

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2016SCI0001

Type of Manuscript: Special Section INVITED PAPER (Special Section on Smart Radio and Its Applications in Conjunction with Main Topics of SmartCom)

Category: Transmission Systems and Transmission Equipment for Communications

Authors

Doohwan LEE
  NTT Corporation
Hirofumi SASAKI
  NTT Corporation
Hiroyuki FUKUMOTO
  NTT Corporation
Ken HIRAGA
  NTT Corporation
Tadao NAKAGAWA
  NTT Corporation

Keyword

orbital angular momentum multiplexing, uniform circular array, Gaussian beam, Bessel beam, lens antenna

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Doohwan LEE, Hirofumi SASAKI, Hiroyuki FUKUMOTO, Ken HIRAGA, Tadao NAKAGAWA, "Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications" in IEICE TRANSACTIONS on Communications, vol. E100-B, no. 7, pp. 1044-1063, July 2017, doi: 10.1587/transcom.2016SCI0001.
Abstract: This paper explores the potential of orbital angular momentum (OAM) multiplexing as a means to enable high-speed wireless transmission. OAM is a physical property of electro-magnetic waves that are characterized by a helical phase front in the propagation direction. Since the characteristic can be used to create multiple orthogonal channels, wireless transmission using OAM can enhance the wireless transmission rate. Comparisons with other wireless transmission technologies clarify that OAM multiplexing is particularly promising for point-to-point wireless transmission. We also clarify three major issues in OAM multiplexing: beam divergence, mode-dependent performance degradation, and reception (Rx) signal-to-noise-ratio (SNR) reduction. To mitigate mode-dependent performance degradation we first present a simple but practical Rx antenna design method. Exploiting the fact that there are specific location sets with phase differences of 90 or 180 degrees, the method allows each OAM mode to be received at its high SNR region. We also introduce two methods to address the Rx SNR reduction issue by exploiting the property of a Gaussian beam generated by multiple uniform circular arrays and by using a dielectric lens antenna. We confirm the feasibility of OAM multiplexing in a proof of concept experiment at 5.2 GHz. The effectiveness of the proposed Rx antenna design method is validated by computer simulations that use experimentally measured values. The two new Rx SNR enhancement methods are validated by computer simulations using wireless transmission at 60 GHz.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.2016SCI0001/_p

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@ARTICLE{e100-b_7_1044,
author={Doohwan LEE, Hirofumi SASAKI, Hiroyuki FUKUMOTO, Ken HIRAGA, Tadao NAKAGAWA, },
journal={IEICE TRANSACTIONS on Communications},
title={Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications},
year={2017},
volume={E100-B},
number={7},
pages={1044-1063},
abstract={This paper explores the potential of orbital angular momentum (OAM) multiplexing as a means to enable high-speed wireless transmission. OAM is a physical property of electro-magnetic waves that are characterized by a helical phase front in the propagation direction. Since the characteristic can be used to create multiple orthogonal channels, wireless transmission using OAM can enhance the wireless transmission rate. Comparisons with other wireless transmission technologies clarify that OAM multiplexing is particularly promising for point-to-point wireless transmission. We also clarify three major issues in OAM multiplexing: beam divergence, mode-dependent performance degradation, and reception (Rx) signal-to-noise-ratio (SNR) reduction. To mitigate mode-dependent performance degradation we first present a simple but practical Rx antenna design method. Exploiting the fact that there are specific location sets with phase differences of 90 or 180 degrees, the method allows each OAM mode to be received at its high SNR region. We also introduce two methods to address the Rx SNR reduction issue by exploiting the property of a Gaussian beam generated by multiple uniform circular arrays and by using a dielectric lens antenna. We confirm the feasibility of OAM multiplexing in a proof of concept experiment at 5.2 GHz. The effectiveness of the proposed Rx antenna design method is validated by computer simulations that use experimentally measured values. The two new Rx SNR enhancement methods are validated by computer simulations using wireless transmission at 60 GHz.},
keywords={},
doi={10.1587/transcom.2016SCI0001},
ISSN={1745-1345},
month={July},}

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TY - JOUR
TI - Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications
T2 - IEICE TRANSACTIONS on Communications
SP - 1044
EP - 1063
AU - Doohwan LEE
AU - Hirofumi SASAKI
AU - Hiroyuki FUKUMOTO
AU - Ken HIRAGA
AU - Tadao NAKAGAWA
PY - 2017
DO - 10.1587/transcom.2016SCI0001
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E100-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2017
AB - This paper explores the potential of orbital angular momentum (OAM) multiplexing as a means to enable high-speed wireless transmission. OAM is a physical property of electro-magnetic waves that are characterized by a helical phase front in the propagation direction. Since the characteristic can be used to create multiple orthogonal channels, wireless transmission using OAM can enhance the wireless transmission rate. Comparisons with other wireless transmission technologies clarify that OAM multiplexing is particularly promising for point-to-point wireless transmission. We also clarify three major issues in OAM multiplexing: beam divergence, mode-dependent performance degradation, and reception (Rx) signal-to-noise-ratio (SNR) reduction. To mitigate mode-dependent performance degradation we first present a simple but practical Rx antenna design method. Exploiting the fact that there are specific location sets with phase differences of 90 or 180 degrees, the method allows each OAM mode to be received at its high SNR region. We also introduce two methods to address the Rx SNR reduction issue by exploiting the property of a Gaussian beam generated by multiple uniform circular arrays and by using a dielectric lens antenna. We confirm the feasibility of OAM multiplexing in a proof of concept experiment at 5.2 GHz. The effectiveness of the proposed Rx antenna design method is validated by computer simulations that use experimentally measured values. The two new Rx SNR enhancement methods are validated by computer simulations using wireless transmission at 60 GHz.
ER -