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Paper Abstract and Keywords
Presentation 2025-01-29 16:35
Iterative Interference Replica Subtraction for Multiuser Massive MIMO Null-Space Expansion
Yuta Tsunoda, Takuto Suzuki, Yuki Sasaki, Kazuki Maruta (Tokyo Univ. of Science) IT2024-42 SIP2024-81 RCS2024-225
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes an improved method for reducing computational complexity by employing the iterative interference replica subtraction technique (IRS), a simplified precoding scheme, in the null space expansion (NSE) that facilitates performance improvement in multi-user massive MIMO systems under time-varying channel conditions. Inter-user interference (IUI) caused by channel variation is a significant issue in multi-user massive MIMO systems. NSE improves IUI suppression by exploiting the large antenna degrees of freedom. During the weight generation process, the iterative interference replica subtraction method, which offers relatively low computational complexity, is utilized for inter-user interference suppression.
In this paper, the effectiveness of the proposed method is clarified by computer simulations through a comparison with the NSE and Zero-forcing (ZF).
Keyword (in Japanese) (See Japanese page) 
(in English) Massive MIMO / Channel time variation / Null-space expansion / Inter-user interference / Replica subtraction / Computation complexity / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 366, RCS2024-225, pp. 92-97, Jan. 2025.
Paper # RCS2024-225 
Date of Issue 2025-01-22 (IT, SIP, 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 IT2024-42 SIP2024-81 RCS2024-225

Conference Information
Committee RCS SIP IT  
Conference Date 2025-01-29 - 2025-01-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Kaikyou-messe 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing for Wireless Communications, Learning, Mathematics, Information Theory, etc. 
Paper Information
Registration To RCS 
Conference Code 2025-01-RCS-SIP-IT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Iterative Interference Replica Subtraction for Multiuser Massive MIMO Null-Space Expansion 
Sub Title (in English)  
Keyword(1) Massive MIMO  
Keyword(2) Channel time variation  
Keyword(3) Null-space expansion  
Keyword(4) Inter-user interference  
Keyword(5) Replica subtraction  
Keyword(6) Computation complexity  
Keyword(7)  
Keyword(8)  
1st Author's Name Yuta Tsunoda  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Takuto Suzuki  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Yuki Sasaki  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
4th Author's Name Kazuki Maruta  
4th Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2025-01-29 16:35:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2024-42, SIP2024-81, RCS2024-225 
Volume (vol) vol.124 
Number (no) no.364(IT), no.365(SIP), no.366(RCS) 
Page pp.92-97 
#Pages 6 
Date of Issue 2025-01-22 (IT, SIP, RCS) 

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