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• W2044892816 startingPage "2387" @default.
• W2044892816 abstract "Coordinated beamforming has been optimized to maximize the sum rate under the transmit power constraints or to minimize the transmit power under the data rate constraints. In this paper, we design a precoder that maximizes the energy efficiency (EE) of multicell multiantenna downlink network with coordination and, in the meantime, ensures the minimal data rate requirement of each user. To find a solution of such a nonconvex optimization problem, we construct a convex subset of the original constraint set and a quasi-concave lower bound of the EE. Then, we propose an iterative algorithm to maximize the lower bound of the EE within the convex subset, which is shown to rapidly converge to a local optimum of the original problem. We evaluate the EE of the proposed algorithm through simulations under different user locations, data rate requirements, and numbers of antennas. The results demonstrate that the proposed precoder performs closely to an upper bound derived from interference-free assumption. When the circuit power consumption is dominant, the proposed precoder is much more energy efficient than the transmit power minimization precoder, as well as a precoder, including an interference alignment (IA) beamformer and the optimized transmit power maximizing the EE." @default.
• W2044892816 created "2016-06-24" @default.
• W2044892816 creator A5002515189 @default.
• W2044892816 creator A5038114094 @default.
• W2044892816 creator A5082950698 @default.
• W2044892816 date "2015-06-01" @default.
• W2044892816 modified "2023-09-29" @default.
• W2044892816 title "Energy-Efficient Coordinated Beamforming Under Minimal Data Rate Constraint of Each User" @default.
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• W2044892816 doi "https://doi.org/10.1109/tvt.2014.2343255" @default.
• W2044892816 hasPublicationYear "2015" @default.
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