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Paper Abstract and Keywords
Presentation 2007-09-21 10:40
Performance Analysis of QO-STBC Grouped Multi-User System
Said Saleh, Takeshi Hashimoto (Univ.of Electro-Comm.) MoMuC2007-51
Abstract (in Japanese) (See Japanese page) 
(in English) Multiple-input multiple-output (MIMO) channel configuration for wireless
transmission has been attracting attention widely since it can provide
larger capacity and stronger robustness against fading. However; using
multiple antennas at the subscriber has the drawback that it makes the
subscriber unit larger and more expensive. Because of that Multiple-input
single-output (MISO) is more preferable in downlink CDMA system. Taking
advantage of the multiple antennas at the base station combined with space
time block codes (STBCs), we can attain space diversity. Quasi
orthogonal space-time block code (QO-STBC) is a good choice because it could
be used with complex signals and a simple decoder.
MISO CDMA in selective fading channels suffers from multiple access
interference (MAI). So, we propose a new downlink MISO CDMA system over frequency-
selective fading channel, which has good performance even when the system is overloaded (when the number of users is larger than processing gain).
Combining grouping of users with QO-STBC and using the proper spreading
sequences assigning, we can realize a downlink MISO CDMA
system with overload factor 2 under frequency-selective fading
Keyword (in Japanese) (See Japanese page) 
(in English) CDMA / MIMO / MISO / QO-STBC / overload factor / downlink / frequency selective fading /  
Reference Info. IEICE Tech. Rep., vol. 107, Sept. 2007.
Paper #  
Date of Issue 2007-09-13 (MoMuC) 
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 MoMuC2007-51

Conference Information
Committee MoNA ITE-BCT ITE-CE  
Conference Date 2007-09-20 - 2007-09-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MoNA 
Conference Code 2007-09-MoMuC-ITE-BCT-ITE-CE 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance Analysis of QO-STBC Grouped Multi-User System 
Sub Title (in English)  
Keyword(1) CDMA  
Keyword(2) MIMO  
Keyword(3) MISO  
Keyword(4) QO-STBC  
Keyword(5) overload factor  
Keyword(6) downlink  
Keyword(7) frequency selective fading  
Keyword(8)  
1st Author's Name Said Saleh  
1st Author's Affiliation The University of Electro-Communications (Univ.of Electro-Comm.)
2nd Author's Name Takeshi Hashimoto  
2nd Author's Affiliation The University of Electro-Communications (Univ.of Electro-Comm.)
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Speaker Author-1 
Date Time 2007-09-21 10:40:00 
Presentation Time 30 minutes 
Registration for MoNA 
Paper # MoMuC2007-51 
Volume (vol) vol.107 
Number (no) no.224 
Page pp.47-50 
#Pages
Date of Issue 2007-09-13 (MoMuC) 


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