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| 講演名 | 2008-03-06 13:20 Base Station Cooperation Null-Beamforing for Spectrum Sharing between Next Generation Cellular and Fixed Satellite Systems ○Ian Dexter Garcia・David Chanin・Kei Sakaguchi・Kiyomichi Araki（Tokyo Inst. of Tech.）・Tomohiro Sugawara・Takayuki Sotoyama（Panasonic Mobile Communications）・Takashi Fukagawa（Matsushita Electric Industrial）  SR2007-90 |
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| 抄録 | （和） | Base station cooperation (BSC) transmission (i.e. multicell transmission, cooperative transmission) has been shown to significantly increase average and cell-edge throughputs compared to conventional single-cell transmission. In this paper, we extend BSC techniques to cooperatively force full or partial nulls at victim receiver antennas (e.g. Fixed Service Satellite Earth Station or ES) while providing cooperative stream transmission to intended receivers (e.g. Next Generation Cellular user terminals). First, we express null-beamforming (NB) spectrum sharing as a constrained optimization problem where the objective is to maximize capacity or coverage of the intended system and the constraints are the BS transmit powers and intersystem interference levels. We then introduce single-cell null-beamforming (SC-NB), linear BSC-NB, and non-linear BSC-NB algorithms. Finally, we test these algorithms on a 2x2 MIMO, 2-cell, IMT-Advanced physical layer model and show their significant increases in capacity and coverage over a power-control scheme and single-cell null-beamforming schemes. |
| （英） | Base station cooperation (BSC) transmission (i.e. multicell transmission, cooperative transmission) has been shown to significantly increase average and cell-edge throughputs compared to conventional single-cell transmission. In this paper, we extend BSC techniques to cooperatively force full or partial nulls at victim receiver antennas (e.g. Fixed Service Satellite Earth Station or ES) while providing cooperative stream transmission to intended receivers (e.g. Next Generation Cellular user terminals). First, we express null-beamforming (NB) spectrum sharing as a constrained optimization problem where the objective is to maximize capacity or coverage of the intended system and the constraints are the BS transmit powers and intersystem interference levels. We then introduce single-cell null-beamforming (SC-NB), linear BSC-NB, and non-linear BSC-NB algorithms. Finally, we test these algorithms on a 2x2 MIMO, 2-cell, IMT-Advanced physical layer model and show their significant increases in capacity and coverage over a power-control scheme and single-cell null-beamforming schemes. | |
| キーワード | （和） | Spectrum Sharing / Base Station Cooperation / Null-Beamforming / Next Generation Cellular / Fixed Satellite Service / / / |
| （英） | Spectrum Sharing / Base Station Cooperation / Null-Beamforming / Next Generation Cellular / Fixed Satellite Service / / / | |
| 文献情報 | 信学技報, vol. 107, no. 519, SR2007-90, pp. 33-38, 2008年3月. | |
| 資料番号 | SR2007-90 | |
| 発行日 | 2008-02-28 (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 | SR2007-90 |
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