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Paper Abstract and Keywords
Presentation 2024-06-20 09:40
Theoretical study on SINR performance of MIMO with null-space expansion -- Relation between null space and conditional probability density of fluctuating channels --
Masaharu Abiru, Makoto Taromaru (Fukuoka Univ.), Hidekazu Murata (Yamaguchi Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Toshifumi Miyagi (NTT) RCS2024-54
Abstract (in Japanese) (See Japanese page) 
(in English) When a mobile terminal connected with MIMO moves in high speed, the channel capacity is degraded because the channel matirix deviates from the channels got at the newest reference symbol (RS) and inter-stream or inter-user interference increases in multiuser MIMO. To overcome this problem, Iwakuni, et al. proposed null-space extention method, which forms null space not only for the interference channel at the newest reference symbol but also for the previous interference channels. In this report, conditional probability density function of the deviated channel from the one at the newest RS is studied theoretically, where each element of the channel matrics is i.i.d. (independently and identically distributed) and the channels at the newest RS and the past RSs are known.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / Null-space expansion / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 84, RCS2024-54, pp. 157-161, June 2024.
Paper # RCS2024-54 
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 RCS2024-54

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) Theoretical study on SINR performance of MIMO with null-space expansion 
Sub Title (in English) Relation between null space and conditional probability density of fluctuating channels 
Keyword(1) MIMO  
Keyword(2) Null-space expansion  
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1st Author's Name Masaharu Abiru  
1st Author's Affiliation Fukuoka University (Fukuoka Univ.)
2nd Author's Name Makoto Taromaru  
2nd Author's Affiliation Fukuoka University (Fukuoka Univ.)
3rd Author's Name Hidekazu Murata  
3rd Author's Affiliation Ymaguchi University (Yamaguchi Univ.)
4th Author's Name Tatsuhiko Iwakuni  
4th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
5th Author's Name Daisei Uchida  
5th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
6th Author's Name Toshifumi Miyagi  
6th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
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Speaker Author-1 
Date Time 2024-06-20 09:40:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2024-54 
Volume (vol) vol.124 
Number (no) no.84 
Page pp.157-161 
#Pages 5 
Date of Issue 2024-06-12 (RCS) 

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