| Presentation | 2008-10-23 Transmitter Optimization on Null-constrained Gaussian MIMO Broadcast Channels Ian GARCIA, Kei SAKAGUCHI, Kiyomichi ARAKI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, transmission over the Gaussian MIMO broadcast channel (BC) with null constraints is formulated as transmitter optimization programming, where perfect channel-state-information is assumed. This approach is applicable to spatial spectrum sharing, and to various multiuser MIMO, MIMO-mesh network and base station cooperation scenarios where null constraints exist at the transmitter antenna weights. The sum-capacity bound and achievable region boundaries are derived via minimax Lagrangian duality for the sum-power and per-antenna-power cases, and for full-null (nullspace) constraints and partial-null constraints where the maximum interference levels at the nulled elements are controlled. A method for precoding is introduced, where user-precoding is performed over a BC with a modified channel, which we refer to as the "nulled BC". Under sum-power constraints, the "SINR-matching" duality is used on the nulled BC to obtain sum-capacity and near-sum-capacity precoding for full-null and partial-null constraints, respectively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Null-constrained Gaussian MIMO / Broadcast Channel / Transmitter Optimization / Transmit & receive interference cancellation |
| Paper # | SR2008-55 |
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| Committee | SR |
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| Conference Date | 2008/10/15(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Software Radio(SR) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Transmitter Optimization on Null-constrained Gaussian MIMO Broadcast Channels |
| Sub Title (in English) | |
| Keyword(1) | Null-constrained Gaussian MIMO |
| Keyword(2) | Broadcast Channel |
| Keyword(3) | Transmitter Optimization |
| Keyword(4) | Transmit & receive interference cancellation |
| 1st Author's Name | Ian GARCIA |
| 1st Author's Affiliation | Tokyo Institute of Technology() |
| 2nd Author's Name | Kei SAKAGUCHI |
| 2nd Author's Affiliation | Tokyo Institute of Technology |
| 3rd Author's Name | Kiyomichi ARAKI |
| 3rd Author's Affiliation | Tokyo Institute of Technology |
| Date | 2008-10-23 |
| Paper # | SR2008-55 |
| Volume (vol) | vol.108 |
| Number (no) | 250 |
| Page | pp.pp.- |
| #Pages | 7 |
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