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Paper Abstract and Keywords
Presentation 2006-10-19 15:40
Scheduling Method for Downlink Multi-user MIMO transmission
Riichi Kudo, Yasushi Takatori, Atsushi Ohta, Kentaro Nishimori, Shuji Kubota (NTT) AP2006-87
Abstract (in Japanese) (See Japanese page) 
(in English) The multiple input multiple output (MIMO) technique enables the application of spatial multiplexing as a way of increasing the spectrum efficiency. However, only a few antenna branches are allowed at a simple mobile terminal (MT) and the MIMO effect is limited for those MTs. Multiuser (MU)-MIMO technique was proposed to support such simple terminals to overcome such problems. In MU-MIMO systems, antennas at all MTs are considered as a large virtual array antenna so a large spectrum efficiency improvement is expected. Since the improvement in the spectrum efficiency greatly depends on the combination of spatially multiplexed users, a simple multiuser selection method is needed.
In this paper, we propose a new capacity estimation method for MU-MIMO systems to reduce the calculation complexity. The proposed method estimates the increase of the achievable bit rate in MU-MIMO compared to that in SU-MIMO with less than tenth of the calculation load of the direct estimation in the block diagonalization algorithm. Theoretical analysis and the simulation results confirm the effectiveness of the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / Multiuser / user selection / beamforming / block diagonalization / correlation matrix / /  
Reference Info. IEICE Tech. Rep., vol. 106, no. 302, AP2006-87, pp. 63-68, Oct. 2006.
Paper # AP2006-87 
Date of Issue 2006-10-12 (AP) 
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 AP2006-87

Conference Information
Committee AP  
Conference Date 2006-10-19 - 2006-10-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. (Katsura Campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2006-10-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Scheduling Method for Downlink Multi-user MIMO transmission 
Sub Title (in English)  
Keyword(1) MIMO  
Keyword(2) Multiuser  
Keyword(3) user selection  
Keyword(4) beamforming  
Keyword(5) block diagonalization  
Keyword(6) correlation matrix  
Keyword(7)  
Keyword(8)  
1st Author's Name Riichi Kudo  
1st Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
2nd Author's Name Yasushi Takatori  
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 Kentaro Nishimori  
4th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
5th Author's Name Shuji Kubota  
5th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
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Speaker Author-1 
Date Time 2006-10-19 15:40:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2006-87 
Volume (vol) vol.106 
Number (no) no.302 
Page pp.63-68 
#Pages 6 
Date of Issue 2006-10-12 (AP) 

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