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Paper Abstract and Keywords
Presentation 2010-06-18 11:25
Partially Non-Orthogonal Block Diagonalization-based Precoding in Multiuser MIMO with Limited Channel State Information Feedbacks
Yuki Tajika, Ryosuke Kimura, Kenichi Higuchi (Tokyo Univ. of Science) RCS2010-38
Abstract (in Japanese) (See Japanese page) 
(in English) We consider a precoding method in downlink multiuser multiple-input multiple-output (MIMO) transmission with the multiple base station (BS) cooperation, where some of the instantaneous channel state information (CSI) is not available at the BS. The proposed precoding scheme is based on the block diagonalization of the channel matrix. However, since some elements of the channel matrix are unknown, we allow a partially non-orthogonal transmission. More specifically, we allow the inter-user interference to the users with limited instantaneous CSI feedback from the channel where instantaneous CSI of that user is not obtained at the BS. The other inter-user interferences are set to zero based on the block diagonalization of the channel matrix. The proposed method can efficiently use the degree of the freedom of the spatial channel compared to the case with full orthogonal transmission at the cost of increased inter-user interference to the users with limited instantaneous CSI feedback. Simulation results elucidate that the proposed method can increase the capacity for a given transmission power or decrease the transmission power for a given capacity requirement compared to the case with full orthogonal transmission.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / Multiuser MIMO / Precoding / Block Diagonalization / Base Station Cooperation / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 77, RCS2010-38, pp. 121-126, June 2010.
Paper # RCS2010-38 
Date of Issue 2010-06-10 (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 RCS2010-38

Conference Information
Committee RCS  
Conference Date 2010-06-17 - 2010-06-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2010-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Partially Non-Orthogonal Block Diagonalization-based Precoding in Multiuser MIMO with Limited Channel State Information Feedbacks 
Sub Title (in English)  
Keyword(1) MIMO  
Keyword(2) Multiuser MIMO  
Keyword(3) Precoding  
Keyword(4) Block Diagonalization  
Keyword(5) Base Station Cooperation  
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1st Author's Name Yuki Tajika  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Ryosuke Kimura  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Kenichi Higuchi  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2010-06-18 11:25:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2010-38 
Volume (vol) vol.110 
Number (no) no.77 
Page pp.121-126 
#Pages 6 
Date of Issue 2010-06-10 (RCS) 

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