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| Presentation | 2009-01-22 14:05 A transmit beamforming method for OFDMA systems Takeshi Fujii, Kazunori Hayashi, Megumi Kaneko, Hideaki Sakai (Kyoto Univ.), Yoji Okada (SEI)  SIP2008-136 RCS2008-184 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this report, we propose a joint transmit beamforming and subcarrier power allocation method for downlink OFDMA (Orthogonal Frequency Division Multiple Access) systems. In the proposed beamforming method, we have employed a strategy of maximizing the ratio of the desired signal power at the desired mobile terminal to the radiant interference power from the base station to mobile terminals in other cells plus additive noise power. This approach enables us to reduce both the computational complexity of the weight calculation and the amount of channel state information feedback. As for the power allocation scheme, we have taken two different approaches, namely, minimization of average bit error rate (BER) and maximization of attainable sum rate. Computer simulation results show the validity of the proposed method in terms of SINR (Signal to Interference plus Noise Ratio), BER and sum rate performance. Moreover, we discuss characteristics of the two different power allocation schemes via numerical results. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | OFDMA / Transmit Beamforming / Power Allocation / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 108, no. 390, SIP2008-136, pp. 71-76, Jan. 2009. | |
| Paper # | SIP2008-136 | |
| Date of Issue | 2009-01-15 (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 | SIP2008-136 RCS2008-184 |
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| Conference Information | |
| Committee | SIP RCS |
| Conference Date | 2009-01-22 - 2009-01-23 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kumamoto University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | SIP |
| Conference Code | 2009-01-SIP-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A transmit beamforming method for OFDMA systems |
| Sub Title (in English) | |
| Keyword(1) | OFDMA |
| Keyword(2) | Transmit Beamforming |
| Keyword(3) | Power Allocation |
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| 1st Author's Name | Takeshi Fujii |
| 1st Author's Affiliation | Kyoto University (Kyoto Univ.) |
| 2nd Author's Name | Kazunori Hayashi |
| 2nd Author's Affiliation | Kyoto University (Kyoto Univ.) |
| 3rd Author's Name | Megumi Kaneko |
| 3rd Author's Affiliation | Kyoto University (Kyoto Univ.) |
| 4th Author's Name | Hideaki Sakai |
| 4th Author's Affiliation | Kyoto University (Kyoto Univ.) |
| 5th Author's Name | Yoji Okada |
| 5th Author's Affiliation | SUMITOMO ELECTRIC INDUSTRIES, LTD. (SEI) |
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| Speaker | Author-1 |
| Date Time | 2009-01-22 14:05:00 |
| Presentation Time | 25 minutes |
| Registration for | SIP |
| Paper # | SIP2008-136, RCS2008-184 |
| Volume (vol) | vol.108 |
| Number (no) | no.390(SIP), no.391(RCS) |
| Page | pp.71-76 |
| #Pages | 6 |
| Date of Issue | 2009-01-15 (SIP, RCS) |
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