Optimal Energy-Efficient Power Allocation Scheme with Low Complexity for Distributed Antenna System
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Date
2017-04
Authors
Wang, Hao
Yu, Xiangbin
Xu, Weiye
Wen, Benben
ORCID
Advisor
Referee
Mark
Journal Title
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Volume Title
Publisher
Společnost pro radioelektronické inženýrství
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Abstract
In this paper, by maximizing the energy efficiency (EE), an optimal power allocation scheme is developed for downlink distributed antenna system (DAS). Different from conventional optimal power allocation schemes that need iterative calculation, the developed scheme can provide closed-form power allocation and no iteration is required. Based on the definition of EE, the optimized objective function is firstly formulated, and then a computationally efficient algorithm is proposed to obtain the optimal number of active remote antennas and the corresponding power allocation. Using the optimal number, the multidimensional solution for the optimized function is transformed into searching one-dimensional solution. As a result, closed-form expression of power allocation coefficients is attained. Numerical results verify the effectiveness of the proposed scheme. The scheme can obtain the same EE as the conventional optimal scheme but with lower complexity, and it has more accuracy than the existing low-complexity scheme.
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Citation
Radioengineering. 2017 vol. 26, č. 1, s. 353-358. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2017/17_01_0353_0358.pdf
http://www.radioeng.cz/fulltexts/2017/17_01_0353_0358.pdf
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Peer-reviewed
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en