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Paper Abstract and Keywords
Presentation 2011-07-21 09:55
Performance of Outer-Loop Control for AMC Based on Mutual Information in MIMO-OFDM Downlink
Teppei Ebihara (Tokyo City Univ.), Hidekazu Taoka (DOCOMO Europe Labs.), Nobuhiko Miki (NTT DOCOMO), Mamoru Sawahashi (Tokyo City Univ.) RCS2011-77
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents the performance of outer-loop control for adaptive modulation and coding (AMC) using mutual information (MI) based mapping between the block error rate (BLER) and received signal-to-interference plus noise power ratio (SINR) in multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) downlink employing maximum likelihood detection (MLD). In AMC, we generate a mapping table between the BLER and MI per bit in advance, which is computed from the received SINR, assuming typical channel conditions including the path model and fading maximum Doppler frequency. Then, in the proposed outer-loop control, the measured MI per bit value for selecting the best modulation and coding scheme (MCS) is adjusted so that the measured BLER after turbo decoding satisfies the prescribed target value. Computer simulation results show that the outer-loop control achieves almost the same throughput as that with a mapping table assuming channel conditions identical to those for the actual measurement, while achieving the nearly identical target BLER. Moreover, we show that the best step size, which provides nearly the maximum throughput, differs according to the change in the maximum Doppler frequency in contrast to the relative feedback delay of the AMC loop. Nevertheless, it is insensitive to the target BLER value.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile communications / MIMO / AMC / Mutual information / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 145, RCS2011-77, pp. 13-18, July 2011.
Paper # RCS2011-77 
Date of Issue 2011-07-14 (RCS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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)
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Conference Information
Committee RCS NS  
Conference Date 2011-07-21 - 2011-07-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Asahikawa Civic Culture Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Fixed/Wireless Network, Hand Over, Relay, Distributed MIMO, Mobile Ad-hoc Network, etc. 
Paper Information
Registration To RCS 
Conference Code 2011-07-RCS-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance of Outer-Loop Control for AMC Based on Mutual Information in MIMO-OFDM Downlink 
Sub Title (in English)  
Keyword(1) Mobile communications  
Keyword(2) MIMO  
Keyword(3) AMC  
Keyword(4) Mutual information  
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1st Author's Name Teppei Ebihara  
1st Author's Affiliation Tokyo City University (Tokyo City Univ.)
2nd Author's Name Hidekazu Taoka  
2nd Author's Affiliation DOCOMO Communications Laboratories Europe GmbH (DOCOMO Europe Labs.)
3rd Author's Name Nobuhiko Miki  
3rd Author's Affiliation NTT DOCOMO (NTT DOCOMO)
4th Author's Name Mamoru Sawahashi  
4th Author's Affiliation Tokyo City University (Tokyo City Univ.)
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Speaker Author-4 
Date Time 2011-07-21 09:55:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2011-77 
Volume (vol) vol.111 
Number (no) no.145 
Page pp.13-18 
#Pages
Date of Issue 2011-07-14 (RCS) 


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