Beamforming Design in Relay-Based Full-Duplex MISO Wireless Powered Communication Networks

In this letter, we jointly design the beamformers of relay and source in full-duplex relay-based wireless powered communication networks. Equipped with multiple antennas, the relay/source is designed to transmit information and receive information/energy simultaneously. Furthermore, the hybrid acces...

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Veröffentlicht in:IEEE communications letters 2016-10, Vol.20 (10), p.2047-2050
Hauptverfasser: Wang, Zhi, Li, Lihua, Wang, Huizhong, Tian, Hui
Format: Artikel
Sprache:eng
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Zusammenfassung:In this letter, we jointly design the beamformers of relay and source in full-duplex relay-based wireless powered communication networks. Equipped with multiple antennas, the relay/source is designed to transmit information and receive information/energy simultaneously. Furthermore, the hybrid access point (H-AP) acts as relay to assist the information transfer from source to destination. Moreover, source transmits signals only with the energy harvested from H-AP/relay and recycled energy from its own transmitted signals. In this setup, we propose a novel one-phase co-channel protocol and jointly design the beamforming of relay and source to maximize the system throughput. As the problem is non-convex, we first use zero forcing (ZF) method to cancel the self-interference at relay and then propose a low-complexity algorithm to obtain the global optimum when the ZF constraint is assumed. Numerical results show that our proposed optimal beamforming design is superior to other reference schemes.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2016.2596279