Resource Allocation in Multi-Cell Massive MIMO System with Time-Splitting Wireless Power Transfer

Jia-Cheng ZHU  Dong-Hua CHEN  Yu-Cheng HE  Lin ZHOU  Jian-Jun MU  

IEICE TRANSACTIONS on Communications   Vol.E101-B   No.11   pp.2331-2339
Publication Date: 2018/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017EBP3449
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
convex approximation,  massive MIMO,  power allocation,  time-splitting,  wireless power transfer,  

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Wireless information and power transfer technology is a promising means of supplying power for remote terminals in future communication systems. This paper investigates time-splitting (TS) recource allocation schemes for multi-cell massive MIMO systems with downlink (DL) wireless power transfer and uplink (UL) user information transmission under a harvest-then-transmit protocol. In order to jointly optimize the power and time allocation, two power minimization problems are formulated under different constraints on the minimal quality-of-service (QoS) requirement. Then, these original non-convex problems are transformed into their convex approximated ones which can be solved iteratively by successive convex approximation. Simulation results show that by exploiting the diversity effect of large-scale antenna arrays, the complexity-reduced asymptotic recourse allocation scheme almost match the power efficiency of the nonasymptotic scheme.