On the secrecy capacity of a full-duplex wirelessly powered communication system

Ivana Nikoloska, Nikola Zlatanov, Zoran Hadži-Velkov, Rui Zhang

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


In this paper, we investigate the secrecy capacity of a point-to-point, full-duplex (FD) wirelesly powered communication system in the presence of a passive eavesdropper (EVE). The considered system is comprised of an energy transmitter (ET), an energy harvesting user (EHU), and a passive EVE. The ET transmits radio-frequency energy, which is used for powering the EHU as well as for generating interference at the EVE. The EHU uses the energy harvested from the ET to transmit confidential messages back to the ET. As a consequence of the FD mode of operation, both the EHU and the ET are subjected to self-interference, which has different effects at the two nodes. In particular, the self-interference impairs the decoding of the received message at the ET, whilst it serves as an additional energy source at the EHU. For this system model, we derive an upper and a lower bound on the secrecy capacity. For the lower bound, we propose a simple achievability scheme. Our numerical results show significant improvements in terms of achievable secrecy rate when the proposed communication scheme is employed against its half-duplex counterpart, even for practical self-interference values at the ET.
Original languageEnglish
Title of host publication2019 16th International Symposium on Wireless Communication Systems (ISWCS)
EditorsMarkku Juntti
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages5
ISBN (Electronic)9781728125275
ISBN (Print)9781728125282
Publication statusPublished - 2019
EventInternational Symposium on Wireless Communication Systems 2019 - Oulu, Finland
Duration: 27 Aug 201930 Aug 2019


ConferenceInternational Symposium on Wireless Communication Systems 2019
Abbreviated titleISWCS 2019
Internet address

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