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Paper Abstract and Keywords
Presentation 2010-07-15 10:50
A Study on Subcarrier Mapping for SC-FDMA System in Relay Communications
Yu Hemmi, Koichi Adachi, Tomoaki Ohtsuki (Keio Univ.) RCS2010-52
Abstract (in Japanese) (See Japanese page) 
(in English) Single-carrier frequency-division multiple-access (SC-FDMA) has been attracting attention as an access scheme for uplink transmission in the next generation mobile communication. In SC-FDMA, the frequency diversity gain can be obtained and user multiplexing is accomplished by mapping the frequency components of the signal into wider frequency band while keeping orthogonality among users. The relay communication has also been gaining attention for reducing the power consumption necessary to achieve desired error rate, enlarging the coverage areas, and so on. In the relay transmission, the mobile station (MS) transmits its signal to the base station (BS) and also to the relay station (RS). At RS, the signal transmitted from MS is processed according to relay scheme and then is transmitted to BS. As a result, the signal is received at BS from not only MS but also RS, and it can obtain the space diversity gain. In SC-FDMA, mapping strategy of the users’ spectrum has an enormous impact on system performance. So far, subcarrier mapping strategies for SC-FDMA have been conducted for the direct (MS-BS) communication. However, in the relay communication, the appropriate way of mapping may be different from that in direct one because of the independent fading of each channel. In this paper, we study how each link should be considered for mapping strategy and show the impact of mapping strategies on the performance of SC-FDMA.
Keyword (in Japanese) (See Japanese page) 
(in English) Relay Communication / SC-FDMA / Subcarrier Mapping / Space Diversity / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 127, RCS2010-52, pp. 25-30, July 2010.
Paper # RCS2010-52 
Date of Issue 2010-07-08 (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)
Download PDF RCS2010-52

Conference Information
Committee RCS NS  
Conference Date 2010-07-15 - 2010-07-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Abashiri Public Auditorium 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Fixed/Wireless Network, Hand Over, Distributed MIMO, Mobile Ad-hoc Network 
Paper Information
Registration To RCS 
Conference Code 2010-07-RCS-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Subcarrier Mapping for SC-FDMA System in Relay Communications 
Sub Title (in English)  
Keyword(1) Relay Communication  
Keyword(2) SC-FDMA  
Keyword(3) Subcarrier Mapping  
Keyword(4) Space Diversity  
1st Author's Name Yu Hemmi  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Koichi Adachi  
2nd Author's Affiliation Keio University (Keio Univ.)
3rd Author's Name Tomoaki Ohtsuki  
3rd Author's Affiliation Keio University (Keio Univ.)
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Date Time 2010-07-15 10:50:00 
Presentation Time 20 
Registration for RCS 
Paper # IEICE-RCS2010-52 
Volume (vol) IEICE-110 
Number (no) no.127 
Page pp.25-30 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2010-07-08 

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