Results and trade-off of self-interference cancellation in a full-duplex radio front-end

Donghyun Lee, Byung Wook Min

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

2 Citations (Scopus)

Abstract

This paper reports experimental results of self-interference cancellation of a full-duplex radio front-end using two techniques, which are antenna cancellation and RF circuit cancellation. Transmitting signals are fed to two identical antennas through a rat race coupler for 180° phase difference, resulting in the antenna cancellation at a receiving antenna equally apart from transmitting antennas. The coupled transmitting signals are adjusted by RF cancellation circuits (attenuator, phase shifter and true time delay) and coupled back to the receiving antenna to achieve the RF circuit cancellation. After optimizing RF cancellation circuits, experimental result shows 60-dB cancellation over 20-MHz bandwidth in a noisy indoor environment. Also, practical difficulties of SIC in RF domain due to transmit and receive path losses and power budget are discussed.

Original languageEnglish
Title of host publication2015 International Workshop on Antenna Technology, iWAT 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages249-251
Number of pages3
ISBN (Electronic)9781479977178
DOIs
Publication statusPublished - 2015 Dec 23
EventInternational Workshop on Antenna Technology, iWAT 2015 - Seoul, Korea, Republic of
Duration: 2015 Mar 42015 Mar 6

Publication series

Name2015 International Workshop on Antenna Technology, iWAT 2015

Other

OtherInternational Workshop on Antenna Technology, iWAT 2015
CountryKorea, Republic of
CitySeoul
Period15/3/415/3/6

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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  • Cite this

    Lee, D., & Min, B. W. (2015). Results and trade-off of self-interference cancellation in a full-duplex radio front-end. In 2015 International Workshop on Antenna Technology, iWAT 2015 (pp. 249-251). [7365318] (2015 International Workshop on Antenna Technology, iWAT 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IWAT.2015.7365318