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| Presentation | 2009-07-17 14:00 Iterative Joint-Processing of Multiuser Detection and Channel Estimation for MIMO-OFDM IDMA Jun Shikida, Satoshi Suyama, Hiroshi Suzuki, Kazuhiko Fukawa (Tokyo Inst. Tech.)  RCS2009-69 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Interleave-division multiple access (IDMA) is a multiple access technique that discriminates among multiple users by using a low-rate channel code and an individual interleaver for each user. Thus, IDMA is expected to improve spectrum efficiency in mobile communications. This report considers MIMO-OFDM IDMA that is a combination of IDMA with MIMO-OFDM, and proposes an iterative receiver for MIMO-OFDM IDMA. The proposed receiver repeats a joint processing of multiuser detection (MUD) and channel estimation by exploiting log-likelihood ratios of coded bits (bit LLR) that channel decoders provide. In the initial process, the channel estimator performs channel estimation using a preamble which is orthogonal to that of each stream for all users, and the iterative MUD performs MMSE detection to suppress undesired streams. In the subsequent iterative process, the channel estimator carries out soft decision-directed channel estimation (SDCE) by exploiting the bit LLRs, and the iterative MUD generates an interference replica using the bit LLRs, and removes the replica from the received signal. Then it performs MMSE filtering to suppress the residual interference and combine the desired stream. Moreover, for improving estimation accuracy and reducing complexity, the channel estimator selects estimated parameters, which is called tap selection. Computer simulations evaluate transmission performances of the receiver employing the iterative joint-processing of MUD and the channel estimation. It is also shown that SDCE can drastically improve accuracy of the channel estimation in the initial process, and thus the receiver can achieve an excellent transmission performance. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | mobile communication / multiple access / IDMA / MIMO-OFDM / channel estimation / multiuser detection / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 130, RCS2009-69, pp. 95-100, July 2009. | |
| Paper # | RCS2009-69 | |
| Date of Issue | 2009-07-09 (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 | RCS2009-69 |
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| Conference Information | |
| Committee | NS RCS |
| Conference Date | 2009-07-16 - 2009-07-17 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido University (Hokkaido) |
| 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 | 2009-07-NS-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Iterative Joint-Processing of Multiuser Detection and Channel Estimation for MIMO-OFDM IDMA |
| Sub Title (in English) | |
| Keyword(1) | mobile communication |
| Keyword(2) | multiple access |
| Keyword(3) | IDMA |
| Keyword(4) | MIMO-OFDM |
| Keyword(5) | channel estimation |
| Keyword(6) | multiuser detection |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Jun Shikida |
| 1st Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. Tech.) |
| 2nd Author's Name | Satoshi Suyama |
| 2nd Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. Tech.) |
| 3rd Author's Name | Hiroshi Suzuki |
| 3rd Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. Tech.) |
| 4th Author's Name | Kazuhiko Fukawa |
| 4th Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. Tech.) |
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| Speaker | Author-1 |
| Date Time | 2009-07-17 14:00:00 |
| Presentation Time | 20 minutes |
| Registration for | RCS |
| Paper # | RCS2009-69 |
| Volume (vol) | vol.109 |
| Number (no) | no.130 |
| Page | pp.95-100 |
| #Pages | 6 |
| Date of Issue | 2009-07-09 (RCS) |
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