Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications

Donghyun Lee; Byung Wook Min

doi:10.1109/WCNCW48565.2020.9124849

Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications

Donghyun Lee, Byung Wook Min

Department of Electrical and Electronic Engineering

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

Abstract

This paper presents methods to design RF front-ends of the MIMO in-band full duplex radio (FDR). The RF front-end reduces the level of the self-interference(SI) using an passive suppression in the antenna domain and an active cancellation in the RF circuit. Three possible methods for the antenna suppression is introduced for M×M MIMO applications, which are separation, circulator, and dual-polarized antenna. In this demonstration, the antenna separation and the reflection-controlled circulator are used for the 2×2 MIMO FDR. A RF board for the active cancellation is designed to make the identical signal with residual SI, which consists of four self-interference reference generators subtracting SIs of two transmitters from two receivers. The reference generators are composed with three taps which are composed of attenuators, phase shifters and true time delays, each, to achieve the cancellation bandwidth of 100 MHz at 3.55 GHz. Experimental results show the passive antenna suppression of >30 dB and total SI isolation with the active cancellation of 60 dB over the bandwidth.

Original language	English
Title of host publication	2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728151786
DOIs	https://doi.org/10.1109/WCNCW48565.2020.9124849
Publication status	Published - 2020 Apr
Event	2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Seoul, Korea, Republic of Duration: 2020 May 25 → 2020 May 28

Publication series

Name	2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings

Conference

Conference	2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020
Country	Korea, Republic of
City	Seoul
Period	20/5/25 → 20/5/28

Bibliographical note

Funding Information:
This work was supported by the LG CTO and Space Core Technology Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (2017M1A3A3A02016255).

Publisher Copyright:
© 2020 IEEE.

All Science Journal Classification (ASJC) codes

Computer Networks and Communications
Signal Processing
Instrumentation

Access to Document

10.1109/WCNCW48565.2020.9124849

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Lee, D., & Min, B. W. (2020). Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications. In 2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings [9124849] (2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNCW48565.2020.9124849

Lee, Donghyun ; Min, Byung Wook. / Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications. 2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2020. (2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings).

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abstract = "This paper presents methods to design RF front-ends of the MIMO in-band full duplex radio (FDR). The RF front-end reduces the level of the self-interference(SI) using an passive suppression in the antenna domain and an active cancellation in the RF circuit. Three possible methods for the antenna suppression is introduced for M×M MIMO applications, which are separation, circulator, and dual-polarized antenna. In this demonstration, the antenna separation and the reflection-controlled circulator are used for the 2×2 MIMO FDR. A RF board for the active cancellation is designed to make the identical signal with residual SI, which consists of four self-interference reference generators subtracting SIs of two transmitters from two receivers. The reference generators are composed with three taps which are composed of attenuators, phase shifters and true time delays, each, to achieve the cancellation bandwidth of 100 MHz at 3.55 GHz. Experimental results show the passive antenna suppression of >30 dB and total SI isolation with the active cancellation of 60 dB over the bandwidth.",

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Lee, D & Min, BW 2020, Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications. in 2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings., 9124849, 2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings, Institute of Electrical and Electronics Engineers Inc., 2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020, Seoul, Korea, Republic of, 20/5/25. https://doi.org/10.1109/WCNCW48565.2020.9124849

Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications. / Lee, Donghyun; Min, Byung Wook.

2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2020. 9124849 (2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings).

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

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N2 - This paper presents methods to design RF front-ends of the MIMO in-band full duplex radio (FDR). The RF front-end reduces the level of the self-interference(SI) using an passive suppression in the antenna domain and an active cancellation in the RF circuit. Three possible methods for the antenna suppression is introduced for M×M MIMO applications, which are separation, circulator, and dual-polarized antenna. In this demonstration, the antenna separation and the reflection-controlled circulator are used for the 2×2 MIMO FDR. A RF board for the active cancellation is designed to make the identical signal with residual SI, which consists of four self-interference reference generators subtracting SIs of two transmitters from two receivers. The reference generators are composed with three taps which are composed of attenuators, phase shifters and true time delays, each, to achieve the cancellation bandwidth of 100 MHz at 3.55 GHz. Experimental results show the passive antenna suppression of >30 dB and total SI isolation with the active cancellation of 60 dB over the bandwidth.

AB - This paper presents methods to design RF front-ends of the MIMO in-band full duplex radio (FDR). The RF front-end reduces the level of the self-interference(SI) using an passive suppression in the antenna domain and an active cancellation in the RF circuit. Three possible methods for the antenna suppression is introduced for M×M MIMO applications, which are separation, circulator, and dual-polarized antenna. In this demonstration, the antenna separation and the reflection-controlled circulator are used for the 2×2 MIMO FDR. A RF board for the active cancellation is designed to make the identical signal with residual SI, which consists of four self-interference reference generators subtracting SIs of two transmitters from two receivers. The reference generators are composed with three taps which are composed of attenuators, phase shifters and true time delays, each, to achieve the cancellation bandwidth of 100 MHz at 3.55 GHz. Experimental results show the passive antenna suppression of >30 dB and total SI isolation with the active cancellation of 60 dB over the bandwidth.

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Lee D, Min BW. Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications. In 2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2020. 9124849. (2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020 - Proceedings). https://doi.org/10.1109/WCNCW48565.2020.9124849

Demonstration of Self-Interference Antenna Suppression and RF Cancellation for Full Duplex MIMO Communications

Abstract

Publication series

Conference

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

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