| Presentation | 2003/9/4 Beam-forming Method for SDMA Systems Reducing Feed-back Information Yasushi Takatori, Keizo Cho, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In frequency division duplex (FDD) systems, since the responses in the downlink channel are generally different from those in the upling, downlink parameters should be estimated by using a feedback approach especially in space-division-multiple-access (SDMA) systems. However, as the number of antenna elements increases, more information bits in the uplink and longer probing periods in the channel response estimation in the downlink are required to feed back all channel responses. This affects the throughput performance significantly in the uplink and downlink. In this paper, we propose new smart antennas and a beam control method for downlink SDMA systems to reduce amount of feedback information. Some simulation results show that proposed method reduces the feedback information almost 1/3, when the number of antenna elements is 8 and the number of users is 3. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | smart antenna / SDMA / beam control |
| Paper # | A・P2003-142 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2003/9/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Beam-forming Method for SDMA Systems Reducing Feed-back Information |
| Sub Title (in English) | |
| Keyword(1) | smart antenna |
| Keyword(2) | SDMA |
| Keyword(3) | beam control |
| 1st Author's Name | Yasushi Takatori |
| 1st Author's Affiliation | NTT Network Innovation Laboratories Nippon Telegraph and Telephone Corporation() |
| 2nd Author's Name | Keizo Cho |
| 2nd Author's Affiliation | NTT Network Innovation Laboratories Nippon Telegraph and Telephone Corporation |
| Date | 2003/9/4 |
| Paper # | A・P2003-142 |
| Volume (vol) | vol.103 |
| Number (no) | 297 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |