In this paper, we study a wireless-powered two-way relay system, in which both wireless-powered sources exchange information through a multi-antenna relay. Both sources are assumed to have no embedded energy supply and thus first need to harvest energy from the radio frequency signals broadcasted by the relay before exchanging their information via the relay. We aim to maximize the sum throughput of both sources by jointly optimizing the time switching duration, the energy beamforming vector and the precoding matrix at the relay. The formulated problem is non-convex and hard to solve in its original form. Motivated by this, we simplify the problem by reducing the number of variables and by decomposing the precoding matrix into a transmit vector and a receive vector. We then propose bisection search, 1-D search and iterative algorithms to optimize each variable. Numerical results show that our proposed scheme can achieve higher throughput than the conventional scheme without optimization on beamforming vector and precoding matrix at the relay.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Wireless-Powered Two-Way Relaying via a Multi-Antenna Relay with Energy Beamforming


    Beteiligte:
    Gao, Zihao (Autor:in) / Chen, He (Autor:in) / Zheng, Gan (Autor:in) / Li, Yonghui (Autor:in) / Vucetic, Branka (Autor:in)


    Erscheinungsdatum :

    01.06.2017


    Format / Umfang :

    196858 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Optimal Time-Switching Relaying Protocol for Wireless-Powered DF Relay Networks

    Yang, Mengqi / Kuo, Yonghong / Chen, Jian et al. | IEEE | 2017


    Distributed Beamforming with Wirelessly Powered Relay Nodes

    Iqbal, Muhammad Ozair / Mahmood, Ammar / Rahman, Muhammad Mahboob Ur et al. | IEEE | 2017


    Performance of Multi-Antenna Wireless-Powered Communications with Nonlinear Energy Harvester

    Huang, Yuzhen / Duong, Trung Q. / Wang, Jinlong et al. | IEEE | 2017


    Energy-Efficient Beamforming and Time Allocation in Wireless Powered Communication Networks

    Fu, Miaomiao / Guo, Chongtao / Zhang, Shengli et al. | IEEE | 2018


    Energy States Aided Relay Selection for Cognitive Relaying Transmission

    Xia, Minghua / Tang, Dong / Jiang, Dandan et al. | IEEE | 2016