| 講演抄録/キーワード |
| 講演名 |
2008-10-23 15:15
ヌル拘束ガウスMIMOブロードキャストチャネルにおける送信機最適化 ○Ian Dexter Garcia・Kei Sakaguchi・Kiyomichi Araki(東工大) SR2008-55 |
| 抄録 |
(和) |
In this paper, transmission over the MIMO broadcast channel (BC) with null constraints is formulated as a transmitter optimization problem, where perfect channel-state-information is assumed. This 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. |
| (英) |
In this paper, transmission over the MIMO broadcast channel (BC) with null constraints is formulated as a transmitter optimization problem, where perfect channel-state-information is assumed. This 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. |
| キーワード |
(和) |
MIMO Systems / Broadcast Channel / Information Rates / Null-Constrained Transmission / IMT-Advanced / Spatial Spectrum Sharing / / |
| (英) |
MIMO Systems / Broadcast Channel / Information Rates / Null-Constrained Transmission / IMT-Advanced / Spatial Spectrum Sharing / / |
| 文献情報 |
信学技報, vol. 108, no. 250, SR2008-55, pp. 119-126, 2008年10月. |
| 資料番号 |
SR2008-55 |
| 発行日 |
2008-10-15 (SR) |
| ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
| PDFダウンロード |
SR2008-55 |
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