Energy-efficient optimization for wireless information and power transfer in large-scale MIMO systems employing energy Beamforming

X Chen, X Wang, Xianfu Chen

    Research output: Contribution to journalArticleScientificpeer-review

    167 Citations (Scopus)

    Abstract

    In this letter, we consider a large-scale multiple-input multiple-output (MIMO) system where the receiver should harvest energy from the transmitter by wireless power transfer to support its wireless information transmission. The energy beamforming in the large-scale MIMO system is utilized to address the challenging problem of long-distance wireless power transfer. Furthermore, considering the limitation of the power in such a system, this letter focuses on the maximization of the energy efficiency of information transmission (bit per Joule) while satisfying the quality-of-service (QoS) requirement, i.e. delay constraint, by jointly optimizing transfer duration and transmit power. By solving the optimization problem, we derive an energy-efficient resource allocation scheme. Numerical results validate the effectiveness of the proposed scheme.
    Original languageEnglish
    Pages (from-to)667-670
    Number of pages3
    JournalIEEE Wireless Communications Letters
    Volume2
    Issue number6
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Energy beamforming
    • Energy-efficient resource allocation
    • large-scale MIMO system
    • QoS guarantee
    • wireless information and power transfer

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