Journal of Guangdong University of Technology ›› 2018, Vol. 35 ›› Issue (06): 37-42.doi: 10.12052/gdutxb.180094

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Robust Resource Allocation for Wireless Powered Non-orthogonal Multiple Access Net-works

Cui Miao1, Pang Hao-ran1, Zhang Guang-chi1, Liu Yi-jun1, Zou Wei-min2   

  1. 1. School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    2. Guangdong Chuangrui Electronic Technology Co., ltd, Dongguan 523039, China
  • Received:2018-07-02 Online:2018-11-23 Published:2018-11-05

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Abstract: The wireless power transfer (WPT) is a controllable and promising way to solve the energy scarcity problem of the devices in wireless networks. The non-orthogonal multiple access (NOMA) scheme is a new multiple access technique, which has been proposed to provide higher spectral efficiency (SE) and support massive user accesses. A wireless powered NOMA network consisting of one multiple-antenna power station, multiple single-antenna users and one single-antenna information receiver is considered. In the downlink, the power station transfers wireless energy to the users, while in the uplink, the users transmit their information to the information receiver in the NOMA manner. A practical scenario where the power station knows imperfect channel state information (CSI) of the downlink channel is viewed, and a robust resource allocation algorithm is proposed to jointly optimize the beamforming of the power station, the transmit powers of the users, and the time lengths of the downlink and uplink in order to maximize the throughput of the system. Simulation results show that the proposed robust design algorithm achieves significantly higher throughput than the non-robust benchmark scheme.

Key words: non-orthogonal multiple access(NOMA), robust, wireless power transfer(WPT), time and power allocation

CLC Number: 

  • TN929.5
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