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Paper Abstract and Keywords
Presentation 2023-06-15 10:50
Investigations on Low-Complexity User-Specific TRP Selection Method in Downlink Distributed MIMO with Regularized ZF-Based Beamforming
Hiroki Kato, Takanori Hara (Tokyo Univ. of Science), Satoshi Suyama, Satoshi Nagata (NTT DOCOMO), Kenichi Higuchi (Tokyo Univ. of Science) RCS2023-54
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a computationally-efficient method for user equipment (UE)-specific transmission reception points (TRP) selection in downlink distributed multi-input multi-output (MIMO) systems assuming the regularized zero-forcing (RZF)-based beamforming (BF). The proposed method selects the set of TRPs used for respective UEs based only on the average path gain information between UEs and TRPs. Thus, the proposed method does not need a complex calculation of downlink BF matrix for TRP selection. On the other hand, the proposed TRP selection metric takes into account the achievable BF gain and spatial interference levels for two extremes cases of RZF that is pure ZF and maximum ratio combining (MRC). This is achieved by utilizing the average path gain information regarding not only the target UE but also its neighbor UEs. This differentiates the proposed method from the conventional ones and the proposed method can improve the system-level throughput performance. We assume a realistic partial CSI scenario and the computer simulation results show the effectiveness of the proposed method compared to the conventional approaches.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / distributed MIMO / cell-free MIMO / transmitter clustering / regularized zero-forcing / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 76, RCS2023-54, pp. 153-160, June 2023.
Paper # RCS2023-54 
Date of Issue 2023-06-07 (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 RCS2023-54

Conference Information
Committee RCS  
Conference Date 2023-06-14 - 2023-06-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido University, and online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2023-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigations on Low-Complexity User-Specific TRP Selection Method in Downlink Distributed MIMO with Regularized ZF-Based Beamforming 
Sub Title (in English)  
Keyword(1) MIMO  
Keyword(2) distributed MIMO  
Keyword(3) cell-free MIMO  
Keyword(4) transmitter clustering  
Keyword(5) regularized zero-forcing  
Keyword(6)  
Keyword(7)  
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1st Author's Name Hiroki Kato  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Takanori Hara  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Satoshi Suyama  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
4th Author's Name Satoshi Nagata  
4th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
5th Author's Name Kenichi Higuchi  
5th Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2023-06-15 10:50:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2023-54 
Volume (vol) vol.123 
Number (no) no.76 
Page pp.153-160 
#Pages 8 
Date of Issue 2023-06-07 (RCS) 

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