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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
Publication Date: 2018/11/01
Online ISSN: 1745-1345
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.