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

Donghyun Lee; Byung Wook Min

doi:10.1109/IWAT.2015.7365318

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

Donghyun Lee, Byung Wook Min

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 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 language	English
Title of host publication	2015 International Workshop on Antenna Technology, iWAT 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	249-251
Number of pages	3
ISBN (Electronic)	9781479977178
DOIs	https://doi.org/10.1109/IWAT.2015.7365318
Publication status	Published - 2015 Dec 23
Event	International Workshop on Antenna Technology, iWAT 2015 - Seoul, Korea, Republic of Duration: 2015 Mar 4 → 2015 Mar 6

Publication series

Name	2015 International Workshop on Antenna Technology, iWAT 2015

Other

Other	International Workshop on Antenna Technology, iWAT 2015
Country/Territory	Korea, Republic of
City	Seoul
Period	15/3/4 → 15/3/6

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

Access to Document

10.1109/IWAT.2015.7365318

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). Article 7365318 (2015 International Workshop on Antenna Technology, iWAT 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IWAT.2015.7365318

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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.",

author = "Donghyun Lee and Min, {Byung Wook}",

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Lee, D & Min, BW 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., 7365318, 2015 International Workshop on Antenna Technology, iWAT 2015, Institute of Electrical and Electronics Engineers Inc., pp. 249-251, International Workshop on Antenna Technology, iWAT 2015, Seoul, Korea, Republic of, 15/3/4. https://doi.org/10.1109/IWAT.2015.7365318

Results and trade-off of self-interference cancellation in a full-duplex radio front-end. / Lee, Donghyun; Min, Byung Wook.
2015 International Workshop on Antenna Technology, iWAT 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 249-251 7365318 (2015 International Workshop on Antenna Technology, iWAT 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - 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.

AB - 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.

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

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