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Paper Abstract and Keywords
Presentation 2010-07-16 10:00
Hybrid Combining Multiuser Detection for Uplink OFDMA Systems with Retransmission Control and Scheduling
Hideya So, Kazuhiko Fukawa, Satoshi Suyama, Hiroshi Suzuki (Tokyo Inst. of Tech.) RCS2010-65
Abstract (in Japanese) (See Japanese page) 
(in English) This report considers uplink OFDMA packet mobile communications that multiplex plural packets within the same resource block (RB) by scheduling control, and proposes hybrid combining multiuser detection (HC-MUD) that combines retransmitted packets by using metric and bit log-likelihood ratio (LLR) for the systems. In the packet transmission multiplexing plural packets within the same RB, the metric combining MUD (MC-MUD) has been proposed. MC-MUD separates multiplexed packets by MUD, and combines retransmitted packets by using the metric, that is the squared Euclid distance between the received signal and its replica. Since MC-MUD needs to retransmit the same packets until all the packets are correctly received, its throughput performance degrades in the high CNR region. To improve the throughput furthermore, LLR combining MUD (LC-MUD) that combines retransmitted packets by using the bit LLR has been proposed. However, the transmission performance of LC-MUD is worse than that of MC-MUD in the low CNR region. To solve such problems of MC-MUD and LC-MUD, HC-MUD combines the same packets by using the metric and can achieve almost the same transmission performance as that of MC-MUD. Moreover, when some packets are correctly received, HC-MUD permits new packets to be multiplexed, and thus can improve the throughput by combining with the bit LLR. Computer simulations evaluate HC-MUD with the scheduling control, and demonstrate that HC-MUD can overcome the drawbacks of MC-MUD and LC-MUD, which leads to excellent throughput performance.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile communications / OFDMA / packet transmission / multiuser detection / retransmission / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 127, RCS2010-65, pp. 101-106, July 2010.
Paper # RCS2010-65 
Date of Issue 2010-07-08 (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 RCS2010-65

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) Hybrid Combining Multiuser Detection for Uplink OFDMA Systems with Retransmission Control and Scheduling 
Sub Title (in English)  
Keyword(1) Mobile communications  
Keyword(2) OFDMA  
Keyword(3) packet transmission  
Keyword(4) multiuser detection  
Keyword(5) retransmission  
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1st Author's Name Hideya So  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Kazuhiko Fukawa  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Satoshi Suyama  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
4th Author's Name Hiroshi Suzuki  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2010-07-16 10:00:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2010-65 
Volume (vol) vol.110 
Number (no) no.127 
Page pp.101-106 
#Pages 6 
Date of Issue 2010-07-08 (RCS) 

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