Enhancing full-duplex information transfer by RF energy harvesting

Chen Feng Liu, Marco Maso, Chia-Han Lee, Tony Q.S. Quek, Leonardo S. Cardoso

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

Abstract

In practical implementations of single-Antenna full-duplex (FD) radios, the imperfect isolation between the transmit (TX) and receive (RX) ports of the circulator causes the leakage of a strong self-interference (SI) component. This issue reduces both the spectral and energy efficiency of the device. State-of-The-Art SI cancellation (SIC) solutions mitigate this problem, however they also constrain the maximum TX power of the FD radio. To address these issues and restrictions, we propose an energy recycling FD architecture that improves both the SIC capability and the spectral/energy efficiency of FD devices by means of a suitable radio frequency (RF) energy harvesting. The benefits brought by such solution are analyzed in an uplink (UL) scenario where two FD access points (APs), operating according to the proposed FD architecture, exchange signaling messages via a wireless link while communicating with two half-duplex (HD) mobile users (MUs). Our findings highlight non-negligible performance enhancements as compared to state-of-The-Art approaches. Specifically, the proposed architecture is shown to yield a rate enhancement up to 29% for both UL transmission and signaling, and the recycling of up to 50% of the wasted energy at the circulator.

Original languageEnglish
Title of host publication2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467398145
DOIs
StatePublished - Apr 2016
Event2016 IEEE Wireless Communications and Networking Conference, WCNC 2016 - Doha, Qatar
Duration: 3 Apr 20167 Apr 2016

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
Volume2016-September
ISSN (Print)1525-3511

Conference

Conference2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
CountryQatar
CityDoha
Period3/04/167/04/16

Keywords

  • energy harvesting
  • Full-duplex radios
  • self-interference cancellation
  • wireless backhaul

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  • Cite this

    Liu, C. F., Maso, M., Lee, C-H., Quek, T. Q. S., & Cardoso, L. S. (2016). Enhancing full-duplex information transfer by RF energy harvesting. In 2016 IEEE Wireless Communications and Networking Conference, WCNC 2016 [7564692] (IEEE Wireless Communications and Networking Conference, WCNC; Vol. 2016-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.2016.7564692