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所属单位：电子信息工程学院
发表刊物：INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
关键字：composite fading distributed antenna system dynamic circuit power consumption energy efficiency low complexity power allocation
摘要：In this paper, a low-complexity optimal power allocation (PA) scheme is developed to maximize energy efficiency (EE) in a distributed antenna system (DAS) under maximum power constraint and target bit error rate (BER) requirement. Composite Rayleigh fading, multiple receive antennas, and dynamic circuit power consumption are all considered in the system. Unlike conventional schemes, the presented scheme provides a closed-form expression of PA. Firstly, the optimization problem is formulated according to the definition of EE. Using the Karush-Kuhn-Tucker conditions, a general form of the optimal PA, in which the number of active antennas and corresponding power allocation are required only, is then proposed. With this general form, an effective algorithm is presented to yield the closed-form PA. The proposed scheme can be applied to the system with static circuit power consumption and/or without target BER constraint to obtain optimal PA. Simulation results corroborate the effectiveness of the developed scheme, and the scheme can achieve the same EE performance as the existing optimal schemes with lower complexity. Moreover, the distributed antenna system with multiple receive antennas has higher EE than that with single receive antenna.
ISSN号：1074-5351
是否译文：否
发表时间：2018-03-25
合写作者：王郝,文犇犇,柳涛
通讯作者：虞湘宾