Transmit beamforming optimization for wireless information and power transfer in MISO interference channels with signal cooperation

Hoon Lee, Sang Rim Lee, Kyoung Jae Lee, Han Bae Kong, Inkyu Lee

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In simultaneous wireless information and power transfer (SWIPT) systems, dedicated energy signals only convey wireless energy, but not information. For this reason, the energycarring signals in the SWIPT can be pre-determined in advance and is shared among communication nodes. By exploiting this nature, this paper designs the optimal transmit beamforming vectors for the multiple-input single-output SWIPT interference channel with signal cooperation (IFC-SC), where the energycarrying signal waveforms are known to transmitters and receivers. Specifically, we aim to identify the optimal tradeoff between the information rate and the harvested energy. To this end, an information rate maximization problem is formulated under minimum required harvested energy constraint, which is non-convex in general. To solve the problem, a new parameterization technique is introduced, and we can decouple the original problem into two subproblems, which yields closed-form beamforming solutions by addressing the line search method for the parameter. Simulation results confirms that the proposed optimal IFC-SC beamforming vectors outperform conventional SWIPT IFC systems.

    Original languageEnglish
    Title of host publication2016 IEEE 84th Vehicular Technology Conference, VTC Fall 2016 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781509017010
    DOIs
    Publication statusPublished - 2016 Jul 2
    Event84th IEEE Vehicular Technology Conference, VTC Fall 2016 - Montreal, Canada
    Duration: 2016 Sept 182016 Sept 21

    Publication series

    NameIEEE Vehicular Technology Conference
    Volume0
    ISSN (Print)1550-2252

    Other

    Other84th IEEE Vehicular Technology Conference, VTC Fall 2016
    Country/TerritoryCanada
    CityMontreal
    Period16/9/1816/9/21

    Bibliographical note

    Funding Information:
    This work was supported by the National Research Foundation of Korea (NRF) funded by the Korea Government (MSIP) under Grant 2014R1A2A1A10049769. K.-J. Lee's work was partially supported through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2013R1A1A1060503 and NRF-2014K1A3A1A09063284).

    Publisher Copyright:
    © 2016 IEEE.

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Applied Mathematics

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