Paper Abstract and Keywords |
Presentation |
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 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
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. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Spectrum Sharing / Base Station Cooperation / Null-Beamforming / Next Generation Cellular / Fixed Satellite Service / / / |
Reference Info. |
IEICE Tech. Rep., vol. 107, no. 519, SR2007-90, pp. 33-38, March 2008. |
Paper # |
SR2007-90 |
Date of Issue |
2008-02-28 (SR) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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SR2007-90 |
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