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Paper Abstract and Keywords
Presentation 2023-09-01 09:50
Virtual Cell MU-MIMO Canceller Coordinating Base Stations in TDD Transmission -- Eigenmode transmission without feedback of transmit and receive weights --
Ryohei Maeda, Takafumi Fujii (SoftBank), Teruya Fujii (Tokyo Tech./SoftBank) RCS2023-118
Abstract (in Japanese) (See Japanese page) 
(in English) In mobile communication systems such as 5G, ultra-high-speed data transmission is expected anywhere within a cell. In a cellular system that repeatedly reuses the same frequency, communication quality deteriorates especially near cell boundaries due to adjacent cell interference. The authors proposed a virtualized cell MU-MIMO canceller, in which adjacent base stations work together to suppress adjacent cell interference and showed that communication quality can be greatly improved. In the previous study, we proposed and evaluated a scheme that applies eigenmode transmission after block diagonalization. When the receiving side determines transmission/reception weights for eigenmode transmission, it is necessary to feed back the transmission weights to the transmission side. But giving feedback is hard work. In this study, we proposed and evaluated eigenmode transmission in which TDD weights are superimposed on the transmitting and receiving sides without TDD feedback.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile Communication / MU-MIMO / TDD / Adaptive Beamforming / Network Coordination / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 172, RCS2023-118, pp. 85-89, Aug. 2023.
Paper # RCS2023-118 
Date of Issue 2023-08-24 (RCS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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 RCS2023-118

Conference Information
Committee RCS SAT  
Conference Date 2023-08-31 - 2023-09-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Naganoken Nokyo Building, and online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Satellite Communications, Broadcasting, Forward Error Correction, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2023-08-RCS-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Virtual Cell MU-MIMO Canceller Coordinating Base Stations in TDD Transmission 
Sub Title (in English) Eigenmode transmission without feedback of transmit and receive weights 
Keyword(1) Mobile Communication  
Keyword(2) MU-MIMO  
Keyword(3) TDD  
Keyword(4) Adaptive Beamforming  
Keyword(5) Network Coordination  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Ryohei Maeda  
1st Author's Affiliation SoftBank Corp. (SoftBank)
2nd Author's Name Takafumi Fujii  
2nd Author's Affiliation SoftBank Corp. (SoftBank)
3rd Author's Name Teruya Fujii  
3rd Author's Affiliation Tokyo Institute of Technology/SoftBank Corp. (Tokyo Tech./SoftBank)
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Speaker Author-1 
Date Time 2023-09-01 09:50:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2023-118 
Volume (vol) vol.123 
Number (no) no.172 
Page pp.85-89 
#Pages 5 
Date of Issue 2023-08-24 (RCS) 

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