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Paper Abstract and Keywords
Presentation 2009-03-04 13:40
Linear Precoding based on Minimum Siganl Distance Criterion for Multiuser MIMO Downlink -- Sub-opimization with Phase Rotation of Interference Signal --
Tomoyuki Yamada, Kentaro Nishimori, Yasushi Takatori, Masato Mizoguchi (NTT) RCS2008-222
Abstract (in Japanese) (See Japanese page) 
(in English) The proposed method improves error rate performance sub-optimizing with respect to the minimum distance criterion by modifying the conventional linear precoding weight (original weight). The conventional MMSE linear precodings such as RCI (Regularized Channel Inversion) for MU-MISO and SMMSE (Successive minimum mean square error) for MU-MIMO maximize SINR (Signal to Interference and Noise Ratio). However these conventional precodings does not optimize with respect to minimum signal distance because they dose not take signal phases into account. Usually, there is a dominant interference signal when using linear precoding under the multipath-rich propagation environment of multiuser MIMO. The proposed linear precoding can sub-maximize the minimum distance by means of the phase rotation of the dominant interference signal. The proposed method modifies the conventional beam forming weight with a little increase of computational complexity. This paper evaluates the bit error performances of the proposed linear precoding using RCI for MU-MISO, and SMMSE for MU-MIMO as the original weights by computer simulations. And the superiority of the proposed methods has been confirmed.
Keyword (in Japanese) (See Japanese page) 
(in English) Multiuser MIMO Downlink / Linear Precoding / Minimum Distance Criterion / Phase Rotation / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 445, RCS2008-222, pp. 59-64, March 2009.
Paper # RCS2008-222 
Date of Issue 2009-02-25 (RCS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee RCS AN MoNA SR  
Conference Date 2009-03-04 - 2009-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Workshop on Mobile Communications 
Paper Information
Registration To RCS 
Conference Code 2009-03-RCS-AN-MoMuC-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Linear Precoding based on Minimum Siganl Distance Criterion for Multiuser MIMO Downlink 
Sub Title (in English) Sub-opimization with Phase Rotation of Interference Signal 
Keyword(1) Multiuser MIMO Downlink  
Keyword(2) Linear Precoding  
Keyword(3) Minimum Distance Criterion  
Keyword(4) Phase Rotation  
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1st Author's Name Tomoyuki Yamada  
1st Author's Affiliation Nippon Telegraph and Telephone corporation (NTT)
2nd Author's Name Kentaro Nishimori  
2nd Author's Affiliation Nippon Telegraph and Telephone corporation (NTT)
3rd Author's Name Yasushi Takatori  
3rd Author's Affiliation Nippon Telegraph and Telephone corporation (NTT)
4th Author's Name Masato Mizoguchi  
4th Author's Affiliation Nippon Telegraph and Telephone corporation (NTT)
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Speaker Author-1 
Date Time 2009-03-04 13:40:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2008-222 
Volume (vol) vol.108 
Number (no) no.445 
Page pp.59-64 
#Pages
Date of Issue 2009-02-25 (RCS) 


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