Energy Efficient Resource Allocation Algorithm for Massive MIMO Systems Based on Wireless Power Transfer

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  • WAN Xiao-yu
    Institute of Next Generation Network, Chongqing University of Posts and Telecommunications
  • YANG Xiao-na
    Institute of Next Generation Network, Chongqing University of Posts and Telecommunications
  • WANG Zheng-qiang
    Institute of Next Generation Network, Chongqing University of Posts and Telecommunications
  • FAN Zi-fu
    Institute of Next Generation Network, Chongqing University of Posts and Telecommunications

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<p>This paper investigates energy-efficient resource allocation problem for the wireless power transfer (WPT) enabled multi-user massive multiple-input multiple-output (MIMO) systems. In the considered systems, the sensor nodes (SNs) are firstly powered by WPT from the power beacon (PB) with a large scale of antennas. Then, the SNs use the harvested energy to transmit the data to the base station (BS) with multiple antennas. The problem of optimizing the energy efficiency objective is formulated with the consideration of maximum transmission power of the PB and the quality of service (QoS) of the SNs. By adopting fractional programming, the energy-efficient optimization problem is firstly converted into a subtractive form. Then, a joint power and time allocation algorithm based on the block coordinate descent and Dinkelbach method is proposed to maximize energy efficiency. Finally, simulation results show the proposed algorithm achieves a good compromise between the spectrum efficiency and total power consumption.</p>

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