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Paper Abstract and Keywords
Presentation 2016-04-22 14:35
Experimental Verification of Multiuser Massive MIMO Null-Space Expansion using Measured Channel State Information
Tatsuhiko Iwakuni, Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2016-21
Abstract (in Japanese) (See Japanese page) 
(in English) Transmission capacity of multiuser MIMO systems is degraded by inter-user interference (IUI) caused due to channel time variation.
Null-space expansion was proposed to suppress such IUI by additional null-steering exploiting excess degrees of freedom (DoFs) of massive MIMO.
This paper addresses the signal-to-interference ratio (SIR) performance achieved by proposed null-space expansion scheme using measured channel state information (CSI).
It is confirmed that the proposed scheme shows superior SIR performance to conventional channel prediction scheme at some user equipment (UE) speed conditions.
In addition, we show that further increasing of the null-space dimension can suppress IUI stably.
Keyword (in Japanese) (See Japanese page) 
(in English) massive MIMO / multiuser MIMO / null-space expansion / channel time variation / inter-user interference / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 11, RCS2016-21, pp. 117-122, April 2016.
Paper # RCS2016-21 
Date of Issue 2016-04-14 (RCS) 
ISSN Print edition: ISSN 0913-5685    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 RCS2016-21

Conference Information
Committee RCS  
Conference Date 2016-04-21 - 2016-04-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Romantopia, A Landscape of Forest and Stars, Hirosaki City 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Radio Access Technologies, etc. 
Paper Information
Registration To RCS 
Conference Code 2016-04-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental Verification of Multiuser Massive MIMO Null-Space Expansion using Measured Channel State Information 
Sub Title (in English)  
Keyword(1) massive MIMO  
Keyword(2) multiuser MIMO  
Keyword(3) null-space expansion  
Keyword(4) channel time variation  
Keyword(5) inter-user interference  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Tatsuhiko Iwakuni  
1st Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
2nd Author's Name Kazuki Maruta  
2nd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
3rd Author's Name Atsushi Ohta  
3rd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
4th Author's Name Yushi Shirato  
4th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
5th Author's Name Takuto Arai  
5th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
6th Author's Name Masataka Iizuka  
6th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
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Speaker Author-1 
Date Time 2016-04-22 14:35:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2016-21 
Volume (vol) vol.116 
Number (no) no.11 
Page pp.117-122 
#Pages 6 
Date of Issue 2016-04-14 (RCS) 

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