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Paper Abstract and Keywords
Presentation 2023-08-31 11:20
Null Spatial Expansion for Low-Complexity Block Diagonalization-based Multiuser Massive MIMO
Yuki Sasaki, Kazuki Maruta (Tokyo Univ. of Science), Kabuto Arai (UEC) RCS2023-103
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a new block diagonalization (BD)-based null-space expansion for multiuser Massive MIMO which offers less computation.
Conventional block diagonalization uses singular value decomposition (SVD) to separate the inter-user interference (IUI), but it has the problem of large amount of computations.
As a solution to this problem, various methods have been proposed to achieve BD without SVD.
The null-space expansion can improve the interference immunity in time-varying environments by leveraging large spatial degrees of freedom (DoF) of antenna array.
Authors have proposed adaptation method of the null-space expansion to the conventional SVD-based BD.
In this paper, we propose a new precoding scheme that applies the null-space extension to the aforementioned low-computational BDs.
Through computer simulations, its performance and computational complexity are compared and its effectiveness is demonstrated.
Keyword (in Japanese) (See Japanese page) 
(in English) Massive MIMO / Multiuser MIMO / Channel time variation / Null-space expansion / Block diagonalization / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 172, RCS2023-103, pp. 9-14, Aug. 2023.
Paper # RCS2023-103 
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 RCS2023-103

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) Null Spatial Expansion for Low-Complexity Block Diagonalization-based Multiuser Massive MIMO 
Sub Title (in English)  
Keyword(1) Massive MIMO  
Keyword(2) Multiuser MIMO  
Keyword(3) Channel time variation  
Keyword(4) Null-space expansion  
Keyword(5) Block diagonalization  
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Keyword(8)  
1st Author's Name Yuki Sasaki  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Kazuki Maruta  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Kabuto Arai  
3rd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2023-08-31 11:20:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2023-103 
Volume (vol) vol.123 
Number (no) no.172 
Page pp.9-14 
#Pages 6 
Date of Issue 2023-08-24 (RCS) 

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