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| Presentation | 2011-03-04 13:40 Turbo Multiuser Detection and Adaptive Multiplexing Control for Uplink OFDMA Systems with Retransmission Control Hideya So, Satoshi Suyama, Kazuhiko Fukawa, Hiroshi Suzuki (Tokyo Inst. of Tech.)  RCS2010-309 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This report considers an uplink OFDMA packet mobile communication system where plural packets of mobile stations (MSs) can be multiplexed within the same time and frequency-band. In such a system, multiuser detection (MUD) schemes that combine retransmitted packets and separate the multiplexed packets have been studied. The conventional MUD employed the maximum likelihood detection (MLD), and the number of the multiplexed packets was kept constant. In contrast, this report proposes turbo MUD (T-MUD) that enhances MLD to maximum a posteriori (MAP) detection by using bit log-likelihood ratios (LLRs) of the decoder output. To reduce the complexity of T-MUD, simplified T-MUD (ST-MUD) is proposed. ST-MUD replaces a replica signal of the MAP detection with a soft replica signal generated from a priori probability and then removes the soft replica signal from the received signal. After such cancellation, it suppresses a residual error of the soft replica cancellation by linear processing. For further more improvement of the throughput, this report also employs adaptive packet-multiplexing that increases the number of multiplexed packets expect in the first transmission. Computer simulations demonstrate that the proposed scheme employing both the MAP detection and the adaptive packet-multiplexing can achieve excellent throughput performance compared with the conventional one, and that despite low complexity, ST-MUD can achieve the same performance as T-MUD in the region of the high throughput. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Mobile communications / OFDMA / packet multiplexing / multiuser detection / retransmission control / turbo detection / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 433, RCS2010-309, pp. 355-360, March 2011. | |
| Paper # | RCS2010-309 | |
| Date of Issue | 2011-02-23 (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 | RCS2010-309 |
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| Conference Information | |
| Committee | RCS MoNA SR |
| Conference Date | 2011-03-02 - 2011-03-04 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | YRP |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2011-03-RCS-MoMuC-SR |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Turbo Multiuser Detection and Adaptive Multiplexing Control for Uplink OFDMA Systems with Retransmission Control |
| Sub Title (in English) | |
| Keyword(1) | Mobile communications |
| Keyword(2) | OFDMA |
| Keyword(3) | packet multiplexing |
| Keyword(4) | multiuser detection |
| Keyword(5) | retransmission control |
| Keyword(6) | turbo detection |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hideya So |
| 1st Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 2nd Author's Name | Satoshi Suyama |
| 2nd Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 3rd Author's Name | Kazuhiko Fukawa |
| 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 | 2011-03-04 13:40:00 |
| Presentation Time | 20 minutes |
| Registration for | RCS |
| Paper # | RCS2010-309 |
| Volume (vol) | vol.110 |
| Number (no) | no.433 |
| Page | pp.355-360 |
| #Pages | 6 |
| Date of Issue | 2011-02-23 (RCS) |
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