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Paper Abstract and Keywords
Presentation 2022-01-21 11:45
Study on compensation for axis misalignment of UCA with multiple UCAs
Nobuhiko Sakuraya, Toshihiko Nishimura, Takeo Ohgane (Hokkaido Univ), Tomoya Tandai, Daisuke Uchida (Toshiba) IT2021-76 SIP2021-84 RCS2021-244
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, mobile data traffic has increased explosively due to increasing wireless devices. Capacity enhancement is required for fronthaul and backhaul accordingly.
Studies on spatial multiplex transmission using orbital angular momentum (OAM) has been undergoing as a solution.
One of the OAM multiplexing methods is the use of uniform circular array (UCA).
It is known that the performance deteriorates seriously if there are misalignments of the UCA at transmitter and/or receiver.
In this paper, we propose a method of compensation for the degradation using maximum ratio transmission scheme for multiple UCAs in the transmitter side.
We also compared the performance of double UCAs or single UCAs when the number of elements on the transmitter side was fixed, and confirmed the robustness to misalignment.
As a result, the double UCA could increase the misalignment robustness compared to the single UCA.
Keyword (in Japanese) (See Japanese page) 
(in English) Orbital angular momentum / Uniform circular array / Spatial multiplexing / misalignment / multiple UCAs / maximum ration combining / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 329, RCS2021-244, pp. 270-275, Jan. 2022.
Paper # RCS2021-244 
Date of Issue 2022-01-13 (IT, SIP, RCS) 
ISSN Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IT2021-76 SIP2021-84 RCS2021-244

Conference Information
Committee RCS SIP IT  
Conference Date 2022-01-20 - 2022-01-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2022-01-RCS-SIP-IT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on compensation for axis misalignment of UCA with multiple UCAs 
Sub Title (in English)  
Keyword(1) Orbital angular momentum  
Keyword(2) Uniform circular array  
Keyword(3) Spatial multiplexing  
Keyword(4) misalignment  
Keyword(5) multiple UCAs  
Keyword(6) maximum ration combining  
1st Author's Name Nobuhiko Sakuraya  
1st Author's Affiliation Hokkaido University (Hokkaido Univ)
2nd Author's Name Toshihiko Nishimura  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ)
3rd Author's Name Takeo Ohgane  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ)
4th Author's Name Tomoya Tandai  
4th Author's Affiliation Toshiba (Toshiba)
5th Author's Name Daisuke Uchida  
5th Author's Affiliation Toshiba (Toshiba)
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Speaker Author-1 
Date Time 2022-01-21 11:45:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2021-76, SIP2021-84, RCS2021-244 
Volume (vol) vol.121 
Number (no) no.327(IT), no.328(SIP), no.329(RCS) 
Page pp.270-275 
Date of Issue 2022-01-13 (IT, SIP, RCS) 

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