Sum throughput maximization for MIMO underlay cognitive wireless powered communication networks

Jaein Kim, Hoon Lee, Changick Song, Taeseok Oh, Inkyu Lee

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

    2 Citations (Scopus)

    Abstract

    This paper investigates multi-user multi-input multi- output cognitive wireless powered communication networks (WPCN), in which a secondary WPCN shares spectrum with a primary wireless information transfer system. A typical WPCN consists of two different phases. In the first downlink phase, a hybrid access point (H-AP) transfers energy to charge users, and then in the subsequent uplink phase, the users send information by using the harvested energy to the H-AP. We consider underlay cognitive WPCN without cooperation between the primary transmitter and the secondary H-AP. In this case, we formulate sum throughput maximization problem by taking the interference leakage to the primary network into consideration. The problem is generally non-convex due to coupled variables in the WPCN. To tackle this issue, we first convert the problem into equivalent convex form, and then identify the global optimal solution by applying the proposed iterative optimization algorithm. Finally, simulation results demonstrate that the proposed algorithm outperforms conventional schemes.

    Original languageEnglish
    Title of host publication2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781509013289
    DOIs
    Publication statusPublished - 2016
    Event59th IEEE Global Communications Conference, GLOBECOM 2016 - Washington, United States
    Duration: 2016 Dec 42016 Dec 8

    Publication series

    Name2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings

    Other

    Other59th IEEE Global Communications Conference, GLOBECOM 2016
    Country/TerritoryUnited States
    CityWashington
    Period16/12/416/12/8

    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

    Publisher Copyright:
    © 2016 IEEE.

    ASJC Scopus subject areas

    • Computational Theory and Mathematics
    • Computer Networks and Communications
    • Hardware and Architecture
    • Safety, Risk, Reliability and Quality

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