On the capacity of a full-duplex wirelessly powered communication system with self-interference and processing cost

Ivana Nikoloska, Nikola Zlatanov, Zoran Hadzi-Velkov

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In this paper, we investigate the capacity of a point-to-point, full-duplex (FD), wirelessly powered communication system impaired by self- interference. This system is comprised of an energy transmitter (ET) and an energy harvesting user (EHU), both operating in a FD mode. The ET transmits energy towards the EHU. The EHU harvests this energy and uses it to transmit information back to the ET. As a result of the FD mode, both nodes are affected by self-interference. The self- interference has a different effect at the two nodes: it impairs the decoding of the received signal at the ET, however, it provides an additional source of energy for the EHU. This paper derives the capacity of this communication system assuming a processing cost at the EHU and additive white Gaussian noise channel with block fading. Thereby, we show that the capacity achieving scheme is relatively simple and therefore applicable to devices with limited resources. Moreover, our numerical results show significant improvements in terms of data rate when the capacity achieving strategy is employed compared to half-duplex transmission. Moreover, we show the positive and negative effects of the self-interference at the EHU and the ET, respectively. Furthermore, we show the crippling effect of the processing cost and demonstrate that failing to take it into consideration gives a false impression in terms of achievable rate.

Original languageEnglish
Title of host publication2018 IEEE International Conference on Communications (ICC) - Proceedings
EditorsYi Qian, Rose Qingyang Hu, Lisandro Zambenedetti Granville
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages7
ISBN (Electronic)9781538631805
ISBN (Print)978153863181
Publication statusPublished - 2018
EventIEEE International Conference on Communications 2018: Communications for Connecting Humanity - Kansas City, United States of America
Duration: 20 May 201824 May 2018
https://ieeexplore.ieee.org/xpl/conhome/8411665/proceeding (Proceedings)

Publication series

NameIEEE International Conference on Communications
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISSN (Print)1550-3607


ConferenceIEEE International Conference on Communications 2018
Abbreviated titleICC 2018
Country/TerritoryUnited States of America
CityKansas City
Internet address

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