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Paper Abstract and Keywords
Presentation 2010-03-04 10:00
Experimental Study of MIMO Precoding Using Two-Way Channel Estimation Technique
Ryosuke Osawa, Hidekazu Murata, Koji Yamamoto, Susumu Yoshida (Kyoto Univ.) RCS2009-287
Abstract (in Japanese) (See Japanese page) 
(in English) The multi-user distributed antenna system (DAS) promises an excellent link quality and improved coverage through coordinated transmission and processing. When the base stations (BSs) have downlink channel state information, the system using sophisticated precoding at the BSs can simplify multi-user receivers through interference suppression. This paper reveals the performance of multiple-input multiple-output (MIMO) precoding using the two-way MIMO channel estimation technique. When a linear precoding with a channel inversion technique is applied, the transmitters adjust their own transmit power so as to maintain a constant received power. As the result, the precoded waveform has a high peak-to-average power ratio (PAPR) in the case of deep channel fades. To overcome this problem, Tomlinson-Harashima precoding (THP), a non-linear precoding using a modulo operator, is introduced. In the DAS, the transmit power is very low because of the short communication distance. Therefore, it is expected that the power loss caused by such high PAPR signals is small. The experimental results demonstrate that linear precoding has good performance compared to the THP in the DAS.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO precoding / linear precoding / Tomlinson-Harashima precoding / peak-to-average power ratio / two-way channel estimation technique / distributed antenna system / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 440, RCS2009-287, pp. 167-172, March 2010.
Paper # RCS2009-287 
Date of Issue 2010-02-24 (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 RCS2009-287

Conference Information
Committee RCS AN MoNA SR  
Conference Date 2010-03-03 - 2010-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2010-03-RCS-AN-MoMuC-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental Study of MIMO Precoding Using Two-Way Channel Estimation Technique 
Sub Title (in English)  
Keyword(1) MIMO precoding  
Keyword(2) linear precoding  
Keyword(3) Tomlinson-Harashima precoding  
Keyword(4) peak-to-average power ratio  
Keyword(5) two-way channel estimation technique  
Keyword(6) distributed antenna system  
Keyword(7)  
Keyword(8)  
1st Author's Name Ryosuke Osawa  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Hidekazu Murata  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Koji Yamamoto  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Susumu Yoshida  
4th Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2010-03-04 10:00:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2009-287 
Volume (vol) vol.109 
Number (no) no.440 
Page pp.167-172 
#Pages 6 
Date of Issue 2010-02-24 (RCS) 

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