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所属单位：电子信息工程学院
发表刊物：RADIOENGINEERING
关键字：Energy efficiency distributed antenna system power allocation low complexity Rayleigh channel
摘要：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.
ISSN号：1210-2512
是否译文：否
发表时间：2017-04-01
合写作者：王郝,Xu, Weiye,Wen, Benben
通讯作者：虞湘宾