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Paper Abstract and Keywords
Presentation 2024-06-19 10:50
Overloaded MU-MIMO with a receive spatial filter
Kosuke Ota, Satoshi Denno, Yafei Hou (Okayama Univ.) RCS2024-33
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a method to improve system throughput by applying overloaded communication in downlink Multi-User - Multiple Input Multiple Output (MU-MIMO) from a base station to multiple users and simultaneously transmitting the same number of streams as transmission antennas. Although the proposed method has a very simple configuration, using only a Tomlinson-Harashima Precoding (THP) at the base station and a spatial filter and amplifier at the receiver, it enables each user to transmit and demodulate the number of streams equal to the number of transmitting antennas. Characteristics have been evaluated by computer simulation, and it is shown that significant improvements can be achieved by applying lattice reduction to the precoding. Compared with a typical conventional system using the Block Diagonalisation (BD) method, in which the number of transmitted streams is reduced to the null-space dimension of each channel, the proposed method can double the throughput with a gain of about 13 dB at BER$=10^{-4}$ for two users. Furthermore, it is shown that the proposed method can triple the throughput for three users, although there is a degradation of about 3 dB at BER$=10^{-4}$.
Keyword (in Japanese) (See Japanese page) 
(in English) overloaded / MU-MIMO / THP / nonlinear / lattice-reduction / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 84, RCS2024-33, pp. 29-34, June 2024.
Paper # RCS2024-33 
Date of Issue 2024-06-12 (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 RCS2024-33

Conference Information
Committee RCS  
Conference Date 2024-06-19 - 2024-06-21 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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 2024-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Overloaded MU-MIMO with a receive spatial filter 
Sub Title (in English)  
Keyword(1) overloaded  
Keyword(2) MU-MIMO  
Keyword(3) THP  
Keyword(4) nonlinear  
Keyword(5) lattice-reduction  
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Keyword(7)  
Keyword(8)  
1st Author's Name Kosuke Ota  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Satoshi Denno  
2nd Author's Affiliation Okayama University (Okayama Univ.)
3rd Author's Name Yafei Hou  
3rd Author's Affiliation Okayama University (Okayama Univ.)
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Speaker Author-1 
Date Time 2024-06-19 10:50:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2024-33 
Volume (vol) vol.124 
Number (no) no.84 
Page pp.29-34 
#Pages 6 
Date of Issue 2024-06-12 (RCS) 

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