Robust Beamforming and Time Allocation for Full-Duplex Wireless-Powered Communication Networks

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We propose a joint optimization of beamforming and time allocation for full-duplex (FD) wireless-powered communication networks (WPCNs). In FD-WPCNs, an FD-enabled hybrid access point (HAP) having multiple antennas broadcasts radio frequency (RF) energy to users, and concurrently each user transmits its own information to the HAP. Due to a lack of fixed power supplies at the users, it is difficult for the HAP to have accurate channel state information (CSI) of all links. Therefore, in this letter, a robust algorithm is proposed to maximize the weighted sum rate of the users against the uncertainty of the CSI using the relationship between the weighted sum rate and the weighted sum of mean-square error. Numerical results demonstrate that the proposed algorithm provides robustness against imperfect channel knowledge and benefits of utilizing multiple antennas in the FD-WPCNs.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2019-09
Language
English
Article Type
Article
Citation

IEEE COMMUNICATIONS LETTERS, v.23, no.9, pp.1665 - 1669

ISSN
1089-7798
DOI
10.1109/LCOMM.2019.2926034
URI
http://hdl.handle.net/10203/267751
Appears in Collection
EE-Journal Papers(저널논문)
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