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所属单位：电子信息工程学院
发表刊物：IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
关键字：Distributed antenna systems (DASs) power allocation (PA) orthogonal frequency division multiplexing (OFDM) block coordinate descent (BCD) method multipath fading channels
摘要：In this paper, three power allocation (PA) schemes for distributed antenna (DA) systems with orthogonal frequency division multiplexing over multipath fading channels are presented. Unlike the conventional total power constraint. power constraints for individual antenna ports are considered. By maximizing the channel capacity of the system subject to per-antenna maximum power constraints, the optimization problem for the PA design is formulated. Based) on the block coordinate descent method, an optimal PA scheme to the optimization problem is derived. Considering that the optimal scheme is an iterative algorithm, a suboptimal PA scheme is derived by maximizing an upper bound of the channel capacity, which provides a closed-form PA procedure. Interestingly. this suboptimal scheme can obtain almost the same performance as the optimal one for large number of subcarriers, low maximum power, and/or small number of DA ports. To reduce the performance loss, a modified suboptimal scheme with closed-form PA is developed, and it has the capacity performance Very close to the optimal scheme. Computer simulations verify the effectiveness of the three proposed schemes.
ISSN号：0018-9545
是否译文：否
发表时间：2018-10-01
合写作者：Xu, Weiye,Leung, Shu-Hung,党小宇,Teng, Tao
通讯作者：虞湘宾