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Paper Abstract and Keywords
Presentation 2009-03-02 11:30
Space-Time Coding Scheme for Forward Link Multiuser STBC-OFDM Systems
Shingo Sasaki, Takahiko Saba (Chiba Inst. of Tech) CAS2008-107 SIP2008-170 CS2008-81
Abstract (in Japanese) (See Japanese page) 
(in English) In forward link multiuser space-time block coded orthogonal frequency division multiplexing (STBC--OFDM) systems, the signal-to-noise power ratio (SNR) of each user's received signal and the fading effect of each subcarrier are different from others. Thus, when subcarriers are not properly assigned to users, intensive bit errors occur in a specific user. This causes a burst error in such a user, and the number of correctable bits decreases. As a result, the bit error rate (BER) performance of the overall system is degraded. In this paper, we propose a space-time coding scheme which distributes bit errors among users. In our coding scheme, by letting several users share a subcarrier, bit errors are distributed among users. Therefore our coding scheme prevents the occurrence of intensive bit errors. Simulation results show that the BER performance of our system with two or three transmit antennas is better than that of the system with the conventional coding scheme even when proper subcarrier assignment schemes are not employed. Thus, our coding scheme can improve the BER performance, while it relaxes the requirement of subcarrier assignment.
Keyword (in Japanese) (See Japanese page) 
(in English) STBC / OFDM / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 455, CS2008-81, pp. 37-42, March 2009.
Paper # CS2008-81 
Date of Issue 2009-02-23 (CAS, SIP, CS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 CAS2008-107 SIP2008-170 CS2008-81

Conference Information
Committee CAS CS SIP  
Conference Date 2009-03-02 - 2009-03-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagaragawa Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network processors, signal processing for communications, wireless LAN/PAN, etc. 
Paper Information
Registration To CS 
Conference Code 2009-03-CAS-CS-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Space-Time Coding Scheme for Forward Link Multiuser STBC-OFDM Systems 
Sub Title (in English)  
Keyword(1) STBC  
Keyword(2) OFDM  
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1st Author's Name Shingo Sasaki  
1st Author's Affiliation Chiba Institute of Technology (Chiba Inst. of Tech)
2nd Author's Name Takahiko Saba  
2nd Author's Affiliation Chiba Institute of Technology (Chiba Inst. of Tech)
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Date Time 2009-03-02 11:30:00 
Presentation Time 20 minutes 
Registration for CS 
Paper # CAS2008-107, SIP2008-170, CS2008-81 
Volume (vol) vol.108 
Number (no) no.453(CAS), no.454(SIP), no.455(CS) 
Page pp.37-42 
#Pages
Date of Issue 2009-02-23 (CAS, SIP, CS) 


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