TY - GEN
T1 - Efficient Inter-mode Interference Cancellation Method for OAM Multiplexing in the Presence of Beam Axis Misalignment
AU - Saito, Shuhei
AU - Ito, Yuki
AU - Suganuma, Hirofumi
AU - Ogawa, Kayo
AU - Maehara, Fumiaki
N1 - Funding Information:
This work was supported by a Research Grant from the Telecommunications Advancement Foundation.
Publisher Copyright:
© 2021 IEEE.
PY - 2021/6
Y1 - 2021/6
N2 - Orbital angular momentum (OAM) multiplexing suffers from inter-mode interference (IMI) due to a beam axis misalignment. However, the traditional IMI cancellation method assumes that the IMI rises from all OAM modes, which results in heavy computational loads. This paper proposes an efficient IMI cancellation method for OAM multiplexing in the presence of a beam axis misalignment. In the proposed method, considering that the interference from adjacent OAM modes is dominant in such a misalignment, IMI cancellation is performed by considering only the neighboring OAM modes. This method can reduce the computational cost while retaining the transmission performance. Moreover, the minimum mean square error (MMSE) is adopted as the equalizer criterion to suppress noise enhancement. The effectiveness of the proposed method as compared with the traditional IMI cancellation method is demonstrated in terms of the system capacity and computational complexity through computer simulations.
AB - Orbital angular momentum (OAM) multiplexing suffers from inter-mode interference (IMI) due to a beam axis misalignment. However, the traditional IMI cancellation method assumes that the IMI rises from all OAM modes, which results in heavy computational loads. This paper proposes an efficient IMI cancellation method for OAM multiplexing in the presence of a beam axis misalignment. In the proposed method, considering that the interference from adjacent OAM modes is dominant in such a misalignment, IMI cancellation is performed by considering only the neighboring OAM modes. This method can reduce the computational cost while retaining the transmission performance. Moreover, the minimum mean square error (MMSE) is adopted as the equalizer criterion to suppress noise enhancement. The effectiveness of the proposed method as compared with the traditional IMI cancellation method is demonstrated in terms of the system capacity and computational complexity through computer simulations.
KW - Orbital angular momentum (OAM)
KW - computational complexity
KW - inter-mode interference
KW - mode multiplexing
KW - uniform circular array (UCA)
UR - http://www.scopus.com/inward/record.url?scp=85112834088&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85112834088&partnerID=8YFLogxK
U2 - 10.1109/ICCWorkshops50388.2021.9473637
DO - 10.1109/ICCWorkshops50388.2021.9473637
M3 - Conference contribution
AN - SCOPUS:85112834088
T3 - 2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021 - Proceedings
BT - 2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021
Y2 - 14 June 2021 through 23 June 2021
ER -