| Presentation | 2009-01-22 A transmit beamforming method for OFDMA systems Takeshi FUJII, Kazunori HAYASHI, Megumi KANEKO, Hideaki SAKAI, YOJI Okada, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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 BER (Bit Error Rate) 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. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDMA / Transmit Beamforming / Power Allocation |
| Paper # | SIP2008-136,RCS2008-184 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2009/1/15(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| 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 |
| 1st Author's Name | Takeshi FUJII |
| 1st Author's Affiliation | Graduate School of Informatics, Kyoto University() |
| 2nd Author's Name | Kazunori HAYASHI |
| 2nd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 3rd Author's Name | Megumi KANEKO |
| 3rd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 4th Author's Name | Hideaki SAKAI |
| 4th Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 5th Author's Name | YOJI Okada |
| 5th Author's Affiliation | Sumitomo Electric Industries, Ltd. |
| Date | 2009-01-22 |
| Paper # | SIP2008-136,RCS2008-184 |
| Volume (vol) | vol.108 |
| Number (no) | 391 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |