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Paper Abstract and Keywords
Presentation 2009-01-22 13:40
A Study on Cell-Edge Throughput Improvement Based on MIMO Coordinated Base Stations for Downlink Transmission in OFDM Systems
Manabu Mikami, Atsushi Nagate, Kenji Hoshino, Teruya Fujii (Softbank Mobile) SIP2008-131 RCS2008-179
Abstract (in Japanese) (See Japanese page) 
(in English) MIMO-OFDM is attracting attention as the wireless access technology for the next-generation mobile radio systems. In order to improve both the cell-edge throughput and the system throughput for MIMO-OFDM cellular systems without the bandwidth expansion, the authors are studying ECO-MIMO (Enhanced COoperative MIMO) system, in which the multiple BSs (Base Stations) coordinate the MIMO transmission scheme, and ECO-OFDM (Enhanced COoperative OFDM) system, in which the multiple BSs coordinate to control radio resource allocation to each user. This paper focuses on downlink cooperative MIMO transmission based on multiple base station (BS) coordination in order to improve the transmission performance of cell-edge users in MIMO-OFDM cellular systems. We study a cooperative MIMO transmission with Double Space Time block coding based Transmit Diversity (D-STTD) technique and evaluate its performance with consideration of the frequency offset difference between the local oscillators in the coordinated BSs. We confirm that it improves user throughput performance of the downlink at the cell edge. Moreover, we introduce the Per Site Rate Control (PSRC) technique, in which each BS independently controls its modulation level; we clarify that the PSRC technique is effective, especially when there is a significant difference in the average received power of the signals transmitted from the coordinated BSs.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO-OFDM / Coordinated Base Stations / Cell-edge Throughput / Per Site Rate Control / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 391, RCS2008-179, pp. 41-46, Jan. 2009.
Paper # RCS2008-179 
Date of Issue 2009-01-15 (SIP, 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 SIP2008-131 RCS2008-179

Conference Information
Committee SIP RCS  
Conference Date 2009-01-22 - 2009-01-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Kumamoto University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2009-01-SIP-RCS 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Cell-Edge Throughput Improvement Based on MIMO Coordinated Base Stations for Downlink Transmission in OFDM Systems 
Sub Title (in English)  
Keyword(1) MIMO-OFDM  
Keyword(2) Coordinated Base Stations  
Keyword(3) Cell-edge Throughput  
Keyword(4) Per Site Rate Control  
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1st Author's Name Manabu Mikami  
1st Author's Affiliation Softbank Mobile (Softbank Mobile)
2nd Author's Name Atsushi Nagate  
2nd Author's Affiliation Softbank Mobile (Softbank Mobile)
3rd Author's Name Kenji Hoshino  
3rd Author's Affiliation Softbank Mobile (Softbank Mobile)
4th Author's Name Teruya Fujii  
4th Author's Affiliation Softbank Mobile (Softbank Mobile)
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Speaker Author-1 
Date Time 2009-01-22 13:40:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # SIP2008-131, RCS2008-179 
Volume (vol) vol.108 
Number (no) no.390(SIP), no.391(RCS) 
Page pp.41-46 
#Pages 6 
Date of Issue 2009-01-15 (SIP, RCS) 

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