Beam-Based Analog Self-Interference Cancellation with Auxiliary Transmit Chains in Full-Duplex MIMO Systems

Le, AT; Tran, LC; Huang, X; Jay Guo, Y

Beam-Based Analog Self-Interference Cancellation with Auxiliary Transmit Chains in Full-Duplex MIMO Systems

Le, AT

Tran, LC Huang, X

Jay Guo, Y

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Publication Type:: Conference Proceeding
Citation:: IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2019, 2019-July
Issue Date:: 2019-07-01

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Field	Value	Language
dc.contributor.author	Le, AT https://orcid.org/0000-0002-9229-4557	en_US
dc.contributor.author	Tran, LC	en_US
dc.contributor.author	Huang, X https://orcid.org/0000-0001-6869-5732	en_US
dc.contributor.author	Jay Guo, Y https://orcid.org/0000-0001-6008-9682	en_US
dc.date.available	2021-08-12T19:01:08Z
dc.date.issued	2019-07-01	en_US
dc.identifier.citation	IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2019, 2019-July	en_US
dc.identifier.isbn	9781538665282	en_US
dc.identifier.uri	http://hdl.handle.net/10453/133716
dc.description.abstract	© 2019 IEEE. Analog domain cancellation has been considered as the most important step to mitigate self-interference (SI) in full-duplex (FD) radios. However, in FD multiple-input multiple-output (MIMO) systems, this method faces a critical issue of complexity since the number of cancellation circuits increases quadratically with the number of antennas. In this paper, we propose a beam-based radio frequency SI cancellation architecture which uses adaptive filters to significantly reduce the complexity. Data symbols for all the beams are up-converted by auxiliary transmit chains to provide reference signals for all adaptive filters. Hence, the number of cancellation circuits becomes proportional to the number of transmit beams which are much smaller than that of transmit antennas. We then show that the interference suppression ratio in this architecture is neither affected by the number of beams nor transmit or receive antennas. Instead, it is decided by the performance of the adaptive filter. Simulations are conducted to confirm the theoretical analyses.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP160101693
dc.relation.ispartof	IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC	en_US
dc.relation.isbasedon	10.1109/SPAWC.2019.8815421	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.title	Beam-Based Analog Self-Interference Cancellation with Auxiliary Transmit Chains in Full-Duplex MIMO Systems	en_US
dc.type	Conference Proceeding
utslib.citation.volume	2019-July	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	2019-July	en_US

Abstract:

© 2019 IEEE. Analog domain cancellation has been considered as the most important step to mitigate self-interference (SI) in full-duplex (FD) radios. However, in FD multiple-input multiple-output (MIMO) systems, this method faces a critical issue of complexity since the number of cancellation circuits increases quadratically with the number of antennas. In this paper, we propose a beam-based radio frequency SI cancellation architecture which uses adaptive filters to significantly reduce the complexity. Data symbols for all the beams are up-converted by auxiliary transmit chains to provide reference signals for all adaptive filters. Hence, the number of cancellation circuits becomes proportional to the number of transmit beams which are much smaller than that of transmit antennas. We then show that the interference suppression ratio in this architecture is neither affected by the number of beams nor transmit or receive antennas. Instead, it is decided by the performance of the adaptive filter. Simulations are conducted to confirm the theoretical analyses.

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http://hdl.handle.net/10453/133716