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| Presentation | 2007-01-25 11:20 Adaptive-Modulation-and-Coding OFDM Radio Packet Systems Employing Bit LLR Combining ARQ with Multiuser Detection Riichiro Nagareda, Kazuhiko Fukawa, Hiroshi Suzuki (Tokyo Tech)  SIP2006-145 RCS2006-203 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This report proposes an OFDM mobile radio packet system that employs a new protocol of automatic repeat request (ARQ) for nonlinear multiuser detection (MUD) with log likelihood ratio (LLR) combining on respective bits. The conventional metric combining MUD (MC-MUD) separates collided packets by using nonlinear MUD, accumulates the squared Euclidian distance metrics of the received subcarrier symbols in the packets, and then achieves throughput improvement. However, when MC-MUD detects a packet error, it makes user terminals retransmit the same packets so as to reproduce the collision of the same packets. The proposed LLR combining MUD (LC-MUD) scheme simplifies the ARQ protocol and requires no reproduction of the same packet collision. The computer simulations demonstrate the superior throughput of LC-MUD to that of MC-MUD, and further improvement due to adaptive modulation and coding (AMC) optimized for the nonlinear MUD in LC-MUD. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | OFDM / mobile radio packet / multiuser detection / ARQ / metric combining / LLR / adaptive modulation and coding / | |
| Reference Info. | IEICE Tech. Rep., vol. 106, no. 479, RCS2006-203, pp. 49-54, Jan. 2007. | |
| Paper # | RCS2006-203 | |
| Date of Issue | 2007-01-18 (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 | SIP2006-145 RCS2006-203 |
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| Conference Information | |
| Committee | RCS SIP |
| Conference Date | 2007-01-24 - 2007-01-26 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | NICT Okinawa |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2007-01-RCS-SIP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Adaptive-Modulation-and-Coding OFDM Radio Packet Systems Employing Bit LLR Combining ARQ with Multiuser Detection |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | mobile radio packet |
| Keyword(3) | multiuser detection |
| Keyword(4) | ARQ |
| Keyword(5) | metric combining |
| Keyword(6) | LLR |
| Keyword(7) | adaptive modulation and coding |
| Keyword(8) | |
| 1st Author's Name | Riichiro Nagareda |
| 1st Author's Affiliation | Tokyo Institute of Technology (Tokyo Tech) |
| 2nd Author's Name | Kazuhiko Fukawa |
| 2nd Author's Affiliation | Tokyo Institute of Technology (Tokyo Tech) |
| 3rd Author's Name | Hiroshi Suzuki |
| 3rd Author's Affiliation | Tokyo Institute of Technology (Tokyo Tech) |
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| Speaker | Author-1 |
| Date Time | 2007-01-25 11:20:00 |
| Presentation Time | 20 minutes |
| Registration for | RCS |
| Paper # | SIP2006-145, RCS2006-203 |
| Volume (vol) | vol.106 |
| Number (no) | no.476(SIP), no.479(RCS) |
| Page | pp.49-54 |
| #Pages | 6 |
| Date of Issue | 2007-01-18 (SIP, RCS) |
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