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Paper Abstract and Keywords
Presentation 2017-10-19 10:50
A Study on Adaptive Channel Estimation for Distributed MIMO Cooperative Transmissions
Fumiyuki Adachi, Amnart Boonkajay (Tohoku Univ.) RCS2017-173
Abstract (in Japanese) (See Japanese page) 
(in English) In distributed MIMO cooperative transmission using time division duplex (TDD), base station (BS) selects at most 4 distributed antennas by carrying out channel estimation using the uplink pilot transmitted from user equipment (UE) and then, transmits the downlink pilot from selected distributed antennas for channel estimation at UE. By doing so, both BS and UE sides can share the MIMO channel state information (CSI) before data transmission and reception. However, in a high mobility environment, CSI acquired by using uplink and downlink pilots will become outdated for data transmission and reception closer to the subframe end. In this paper, we propose a decision-feedback adaptive channel estimation scheme. The linear prediction (LP) is applied. The bit error rate (BER) performances of OFDM downlink using maximal ratio transmit diversity (MRTD) and single-carrier (SC) uplink using maximal ratio combining diversity (MRCD)/minimum mean square error combining diversity (MMSECD) is evaluated by computer simulation in a high mobility environment. It is confirmed that the proposed decision-feedback adaptive channel estimation can significantly improve the BER performance in a high mobility environment.
Keyword (in Japanese) (See Japanese page) 
(in English) Distributed MIMO / cooperative transmission / TDD / channel estimation / decision feedback / linear prediction / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 246, RCS2017-173, pp. 31-36, Oct. 2017.
Paper # RCS2017-173 
Date of Issue 2017-10-12 (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 2017-10-19 - 2017-10-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2017-10-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Adaptive Channel Estimation for Distributed MIMO Cooperative Transmissions 
Sub Title (in English)  
Keyword(1) Distributed MIMO  
Keyword(2) cooperative transmission  
Keyword(3) TDD  
Keyword(4) channel estimation  
Keyword(5) decision feedback  
Keyword(6) linear prediction  
1st Author's Name Fumiyuki Adachi  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Amnart Boonkajay  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
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Date Time 2017-10-19 10:50:00 
Presentation Time 20 
Registration for RCS 
Paper # IEICE-RCS2017-173 
Volume (vol) IEICE-117 
Number (no) no.246 
Page pp.31-36 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2017-10-12 

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