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| Presentation | 2009-11-27 15:50 Iterative Receiver Employing Simplified Multiuser Detector for MIMO-OFDM IDMA Systems Jun Shikida, Satoshi Suyama, Hiroshi Suzuki, Kazuhiko Fukawa (Tokyo Inst. of Tech.)  RCS2009-166 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This report proposes a simplified multiuser detector (S-MUD) that can drastically reduces computational complexity compared to the conventional multiuser detector (MUD) and applies S-MUD to an iterative receiver for uplink MIMO-OFDM interleave-division multiple access (IDMA). MIMO-OFDM IDMA, which is a combination of IDMA and MIMO-OFDM, has been investigated recently because it is expected to improve spectrum efficiency in mobile communications. The conventional MUD for MIMO-OFDM IDMA requires high-complexity matrix inversion in order to perform MMSE-based filtering which suppresses residual interference that is composed of both the other streams of the desired user and all streams of the other users. To cope with such a problem, this report proposes S-MUD that can avoid the matrix inversion by calculating bit log-likelihood ratio (LLR) from the received signal of each receive antenna and then combining bit LLRs of all the receive antennas. In addition, S-MUD is applied to the iterative receiver. Moreover, differently from the conventional iterative receiver that parallelly performs MUD and decoding, this report also proposes a serial iterative receiver that performs MUD and decoding for single user in descending order of the received power, and presents the serial iterative receiver employing S-MUD. Computer simulations with $4 \times 4$ MIMO-OFDM IDMA evaluate transmission performances of the parallel iterative receiver with S-MUD, and show that when the number of users is less than four, it can achieve the same transmission performance as the receiver with the conventional MUD. It is also shown that when the number of users is more than six, the serial iterative receiver employing S-MUD can improve performances and drastically reduce the computational complexity. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | mobile communication / multiple access / IDMA / MIMO-OFDM / multiuser detection / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 305, RCS2009-166, pp. 195-200, Nov. 2009. | |
| Paper # | RCS2009-166 | |
| Date of Issue | 2009-11-19 (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 | RCS2009-166 |
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| Conference Information | |
| Committee | RCS AP |
| Conference Date | 2009-11-26 - 2009-11-27 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Inst. of Tech. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceller, MIMO, Wireless Communication Systems, etc. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2009-11-RCS-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Iterative Receiver Employing Simplified Multiuser Detector for MIMO-OFDM IDMA Systems |
| Sub Title (in English) | |
| Keyword(1) | mobile communication |
| Keyword(2) | multiple access |
| Keyword(3) | IDMA |
| Keyword(4) | MIMO-OFDM |
| Keyword(5) | multiuser detection |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Jun Shikida |
| 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 | Hiroshi Suzuki |
| 3rd Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 4th Author's Name | Kazuhiko Fukawa |
| 4th Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
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| Speaker | Author-1 |
| Date Time | 2009-11-27 15:50:00 |
| Presentation Time | 20 minutes |
| Registration for | RCS |
| Paper # | RCS2009-166 |
| Volume (vol) | vol.109 |
| Number (no) | no.305 |
| Page | pp.195-200 |
| #Pages | 6 |
| Date of Issue | 2009-11-19 (RCS) |
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