Asymptotic sum-capacity of MIMO two-way relay channels within 1/2 log 5/4 bit per user-antenna

Yuan, X; Yang, T

Asymptotic sum-capacity of MIMO two-way relay channels within 1/2 log 5/4 bit per user-antenna

Yuan, X Yang, T

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Publication Type:: Conference Proceeding
Citation:: IEEE International Symposium on Information Theory - Proceedings, 2013, pp. 1317 - 1321
Issue Date:: 2013-12-19

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Field	Value	Language
dc.contributor.author	Yuan, X	en_US
dc.contributor.author	Yang, T https://orcid.org/0000-0002-9870-6866	en_US
dc.date.issued	2013-12-19	en_US
dc.identifier.citation	IEEE International Symposium on Information Theory - Proceedings, 2013, pp. 1317 - 1321	en_US
dc.identifier.isbn	9781479904464	en_US
dc.identifier.issn	2157-8095	en_US
dc.identifier.uri	http://hdl.handle.net/10453/119839
dc.description.abstract	We propose a novel space-division based network-coding scheme for multiple-input multiple-output (MIMO) two-way relay channels (TWRCs), in which two multi-antenna users exchange information via a multi-antenna relay. In the proposed scheme, the overall signal space at the relay is divided into two subspaces. In one subspace, the spatial streams of the two users have nearly orthogonal directions, and are completely decoded at the relay. In the other subspace, the signal directions of the two users are nearly parallel, and linear functions of the spatial streams are computed at the relay, following the principle of physical-layer network coding (PNC). Based on the recovered messages and message-functions, the relay generates and forwards network-coded messages to the two users. We show that, at high signal-to-noise ratio (SNR), the proposed scheme with optimized precoding achieves the asymptotic sum-rate capacity of MIMO TWRCs within 1/2 log(5/4) ≈ 0.161 bit per user-antenna, for any antenna configuration and any channel realization. © 2013 IEEE.	en_US
dc.relation.ispartof	IEEE International Symposium on Information Theory - Proceedings	en_US
dc.relation.isbasedon	10.1109/ISIT.2013.6620440	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Asymptotic sum-capacity of MIMO two-way relay channels within 1/2 log 5/4 bit per user-antenna	en_US
dc.type	Conference Proceeding
utslib.for	0806 Information Systems	en_US
utslib.for	0906 Electrical and Electronic Engineering	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
utslib.copyright.status	closed_access	*
pubs.publication-status	Published	en_US

Abstract:

We propose a novel space-division based network-coding scheme for multiple-input multiple-output (MIMO) two-way relay channels (TWRCs), in which two multi-antenna users exchange information via a multi-antenna relay. In the proposed scheme, the overall signal space at the relay is divided into two subspaces. In one subspace, the spatial streams of the two users have nearly orthogonal directions, and are completely decoded at the relay. In the other subspace, the signal directions of the two users are nearly parallel, and linear functions of the spatial streams are computed at the relay, following the principle of physical-layer network coding (PNC). Based on the recovered messages and message-functions, the relay generates and forwards network-coded messages to the two users. We show that, at high signal-to-noise ratio (SNR), the proposed scheme with optimized precoding achieves the asymptotic sum-rate capacity of MIMO TWRCs within 1/2 log(5/4) ≈ 0.161 bit per user-antenna, for any antenna configuration and any channel realization. © 2013 IEEE.

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