Optimal time allocation for multi-antenna wireless powered heterogeneous sensor network communications under imperfect CSI
作者： Feng Zhao , Lina Wei , Hongbin Chen
DOI: 10.1016/J.SIGPRO.2015.06.022
关键词:
摘要: Energy harvesting is a promising technology to overcome the energy bottleneck in battery-powered heterogeneous sensor networks (HSNs). In an HSN, nodes harvest power themselves, and use harvested for data transmission. This paper investigates multiple-input single-output wireless powered HSN with imperfect channel state information (CSI). The receiver harvests from transmitter via radio-frequency transfer (WPT) downlink support (WIT) uplink. To improve WPT efficiency, employs beamforming by using instantaneous CSI. Under CSI, performs estimation feeds CSI back transmitter. We focus on balancing time duration estimation, WPT, WIT, so as maximize throughput while satisfying constraint. By solving this optimizing problem, we derive optimal resource allocation scheme. Numerical simulation results demonstrate effectiveness of proposed investigate network CSI.To beamforming.We throughput.
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