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Paper Abstract and Keywords
Presentation 2012-04-19 16:25
[Invited Talk] Research and Development of Coherent Distributed Antenna Systems -- Towards Realization of Green Wireless Systems --
Hidekazu Murata, Susumu Yoshida, Koji Yamamoto (Kyoto Univ.), Daisuke Umehara (Kyoto Tech.), Satoshi Denno (Okayama Univ.), Masahiro Morikura (Kyoto Univ.) RCS2012-9
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents an experimental setup and preliminary results of a multi-user MIMO precoding system for distributed antenna systems. The experimental system consists of a base station with two antennas and two mobile stations.
In this system, a two-way channel estimation technique is implemented in which mobile stations just send back the received signals along with their training sequences.
In this technique, the base station can obtain the channel coefficients of both the uplink and the downlink.
This two-way multiple-input multiple-output channel estimation technique has been proposed and mathematically analyzed in literature. Computer simulation results have been reported to identify the required hardware specifications for amplify and forward operation in mobile stations by examining the bit error rate performance. However, hardware implementation feasibility of this technique is not studied yet.
In this paper, feasibility of a multi-user MIMO linear precoding system using two-way channel estimation technique is shown by in-lab and field experiments.
Keyword (in Japanese) (See Japanese page) 
(in English) Multi-user MIMO / USRP / Precoding / Transmission experiment / Field experiment / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 11, RCS2012-9, pp. 49-54, April 2012.
Paper # RCS2012-9 
Date of Issue 2012-04-12 (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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee RCS  
Conference Date 2012-04-19 - 2012-04-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Radio Access Technologies, etc. 
Paper Information
Registration To RCS 
Conference Code 2012-04-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) [Invited Talk] Research and Development of Coherent Distributed Antenna Systems 
Sub Title (in English) Towards Realization of Green Wireless Systems 
Keyword(1) Multi-user MIMO  
Keyword(2) USRP  
Keyword(3) Precoding  
Keyword(4) Transmission experiment  
Keyword(5) Field experiment  
1st Author's Name Hidekazu Murata  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Susumu Yoshida  
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 Daisuke Umehara  
4th Author's Affiliation Kyoto Institute of Technology (Kyoto Tech.)
5th Author's Name Satoshi Denno  
5th Author's Affiliation Okayama University (Okayama Univ.)
6th Author's Name Masahiro Morikura  
6th Author's Affiliation Kyoto University (Kyoto Univ.)
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Date Time 2012-04-19 16:25:00 
Presentation Time 30 
Registration for RCS 
Paper # IEICE-RCS2012-9 
Volume (vol) IEICE-112 
Number (no) no.11 
Page pp.49-54 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2012-04-12 

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