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Paper Abstract and Keywords
Presentation 2012-11-16 09:30
An efficient channel estimation scheme without feedback in bi-directional two-timeslot OFDM relay systems
Yuta Koshimizu, Eiji Okamoto (Nagoya Inst. Tech.) RCS2012-172
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose an efficient channel estimation scheme without feedback from relay in bi-directional two-timeslot orthogonal frequency division multiplexing (OFDM) relay systems. In the proposed channel estimation scheme, Walsh code is used as pilot symbols at the transmitter and the receiver detects and estimates the desired channel coefficients by the correlation processing. The proposed Walsh pilots frame structure could be applied to the sparse frame structure with fewer pilots. Furthermore, since the desired channels are estimated only at the destination nodes, there is no need of channel feedback from relay node which degrades the throughput performance severely. The bit error rate (BER) and throughput performances of the proposed scheme are evaluated by the computer simulations and we show the effectiveness of the proposed scheme.
Keyword (in Japanese) (See Japanese page) 
(in English) Channel estimation / Walsh code / OFDM / Relay systems / Network coding / Channel feedback / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 286, RCS2012-172, pp. 67-72, Nov. 2012.
Paper # RCS2012-172 
Date of Issue 2012-11-08 (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 RCS2012-172

Conference Information
Committee AP RCS  
Conference Date 2012-11-14 - 2012-11-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Denki University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2012-11-AP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An efficient channel estimation scheme without feedback in bi-directional two-timeslot OFDM relay systems 
Sub Title (in English)  
Keyword(1) Channel estimation  
Keyword(2) Walsh code  
Keyword(3) OFDM  
Keyword(4) Relay systems  
Keyword(5) Network coding  
Keyword(6) Channel feedback  
Keyword(7)  
Keyword(8)  
1st Author's Name Yuta Koshimizu  
1st Author's Affiliation Nagoya Institute of Technology (Nagoya Inst. Tech.)
2nd Author's Name Eiji Okamoto  
2nd Author's Affiliation Nagoya Institute of Technology (Nagoya Inst. Tech.)
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Speaker Author-1 
Date Time 2012-11-16 09:30:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2012-172 
Volume (vol) vol.112 
Number (no) no.286 
Page pp.67-72 
#Pages 6 
Date of Issue 2012-11-08 (RCS) 

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