| Presentation | 2008-03-07 Imperfect Block Diagonalization for Downlink Multiuser MIMO Systems Shohei KATO, Hiroshi NISHIMOTO, Yasutaka OGAWA, Takeo OHGANE, Toshihiko NISHIMURA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, a multiuser MIMO system has attracted much attention. In the downlink of the multiuser MIMO system, since the base station simultaneously transmits signals to terminals, there is inter-user interference (IUI) at each terminal. Block diagonalization, which can achieve perfect IUI supression, has been extensively studied to solve the issue. However, with the scheme we cannot obtain sufficient diversity gain due to the null steering at the base station. In this paper, we propose imperfect block diagonalization based on maximum eigenvectors of users and Gram-Schmidt orthonormalization, and its error rate performance is evaluated using computer simulation. The result shows that, despite its low complexity, the proposed scheme provides excellent performance, especially in many user environments. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Multiuser MIMO / Downlink, IUI / Block Diagonalization / Gram-Schmidt Orthonormalization |
| Paper # | RCS2007-241 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2008/2/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| 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) | Imperfect Block Diagonalization for Downlink Multiuser MIMO Systems |
| Sub Title (in English) | |
| Keyword(1) | Multiuser MIMO |
| Keyword(2) | Downlink, IUI |
| Keyword(3) | Block Diagonalization |
| Keyword(4) | Gram-Schmidt Orthonormalization |
| 1st Author's Name | Shohei KATO |
| 1st Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University() |
| 2nd Author's Name | Hiroshi NISHIMOTO |
| 2nd Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| 3rd Author's Name | Yasutaka OGAWA |
| 3rd Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| 4th Author's Name | Takeo OHGANE |
| 4th Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| 5th Author's Name | Toshihiko NISHIMURA |
| 5th Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| Date | 2008-03-07 |
| Paper # | RCS2007-241 |
| Volume (vol) | vol.107 |
| Number (no) | 518 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |