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

Xiao-yu WAN  Xiao-na YANG  Zheng-qiang WANG  Zi-fu FAN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E102-B   No.2   pp.351-358
Publication Date: 2019/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3134
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
massive multiple input multiple outputs,  energy efficiency,  resource allocation,  fractional programming,  wireless power transfer,  

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Summary: 
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.