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Paper Abstract and Keywords
Presentation 2016-03-04 15:05
A design of user communication quality in linearly precoded MU-MIMO downlink system
Guoyu Zhang, Yasunori Iwanami (N.I.T.) RCS2015-395
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, Muti-User MIMO (MU-MIMO) downlink system which uses multiple antennas at base station and accommodates multiple users with multiple receive antennas attracts much attention. It can achieve a high channel capacity when the channel state information is known both at base station and each user. There exist linear and non-linear MU-MIMO downlink schemes, but the linear scheme is considered more easily to be implemented and adjusted. Linear Block Diagonalization (BD) has been proposed in order to cancel the Inter-User Interference (IUI), and combined with the Eigen-mode transmission. In this paper, by noting that the block size of each user matrix in BD becomes (number of receive antennas of each user) (nullity of the matrix constituted by other users), we design the BD + Eigen mode MU-MIMO scheme based on the down link quality of each user, i.e., the diversity order. We made simulations for some examples and show the effectiveness of the design method based on the user link quality.
Keyword (in Japanese) (See Japanese page) 
(in English) MU-MIMO / Block Diagonalization / Eigen mode transmission / Nullity / Diversity order / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 472, RCS2015-395, pp. 363-368, March 2016.
Paper # RCS2015-395 
Date of Issue 2016-02-24 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF RCS2015-395

Conference Information
Committee RCS CCS SR SRW  
Conference Date 2016-03-02 - 2016-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2016-03-RCS-CCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A design of user communication quality in linearly precoded MU-MIMO downlink system 
Sub Title (in English)  
Keyword(1) MU-MIMO  
Keyword(2) Block Diagonalization  
Keyword(3) Eigen mode transmission  
Keyword(4) Nullity  
Keyword(5) Diversity order  
1st Author's Name Guoyu Zhang  
1st Author's Affiliation Nagoya Institute of Technology (N.I.T.)
2nd Author's Name Yasunori Iwanami  
2nd Author's Affiliation Nagoya Institute of Technology (N.I.T.)
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Date Time 2016-03-04 15:05:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2015-395 
Volume (vol) IEICE-115 
Number (no) no.472 
Page pp.363-368 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2016-02-24 

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