Reduced-dimension cooperative precoding for MIMO two-way relay channels

Yang, T; Yuan, X; Collings, IB

Reduced-dimension cooperative precoding for MIMO two-way relay channels

Yang, T

Yuan, X Collings, IB

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Publication Type:: Journal Article
Citation:: IEEE Transactions on Wireless Communications, 2012, 11 (11), pp. 4150 - 4160
Issue Date:: 2012-10-10

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Field	Value	Language
dc.contributor.author	Yang, T https://orcid.org/0000-0002-9870-6866	en_US
dc.contributor.author	Yuan, X	en_US
dc.contributor.author	Collings, IB	en_US
dc.date.issued	2012-10-10	en_US
dc.identifier.citation	IEEE Transactions on Wireless Communications, 2012, 11 (11), pp. 4150 - 4160	en_US
dc.identifier.issn	1536-1276	en_US
dc.identifier.uri	http://hdl.handle.net/10453/39570
dc.description.abstract	We investigate efficient communications over MIMO two-way relay channels (TWRCs) of nTn R, where nT denotes the number of antennas at each user and n-{R} denotes that at the relay. We propose a new reduced-dimension (RD) cooperative precoding scheme. In the proposed scheme, the two users cooperatively create nT aligned eigen-modes, supporting nT streams of physical-layer network coding. We investigate the design of the RD cooperative precoder and derive an asymptotically optimal solution. We analytically show that, in the worst case, the proposed scheme is within 1/2 bit per transmit antenna of the asymptotic sum-capacity of the MIMO TWRC. For fading MIMO TWRCs with i.i.d. Gaussian coefficients, we derive a closed-form expression of the average sum-rate of the proposed scheme using large system analysis. Our analytical result shows that, for a large system with nT nR=1/2, the proposed scheme is less than 0.16 bit per transmit antenna away from the capacity. Furthermore, this gap reduces as nT nR increases, and vanishes as nT nR tends to 1. It is demonstrated that the proposed scheme can significantly outperform other existing schemes in the literature. © 2012 IEEE.	en_US
dc.relation.ispartof	IEEE Transactions on Wireless Communications	en_US
dc.relation.isbasedon	10.1109/TWC.2012.092112.120345	en_US
dc.subject.classification	Networking & Telecommunications	en_US
dc.title	Reduced-dimension cooperative precoding for MIMO two-way relay channels	en_US
dc.type	Journal Article
utslib.citation.volume	11	en_US
utslib.for	0805 Distributed Computing	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1005 Communications Technologies	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.issue	11	en_US
pubs.publication-status	Published	en_US
pubs.volume	11	en_US

Abstract:

We investigate efficient communications over MIMO two-way relay channels (TWRCs) of nTn R, where nT denotes the number of antennas at each user and n-{R} denotes that at the relay. We propose a new reduced-dimension (RD) cooperative precoding scheme. In the proposed scheme, the two users cooperatively create nT aligned eigen-modes, supporting nT streams of physical-layer network coding. We investigate the design of the RD cooperative precoder and derive an asymptotically optimal solution. We analytically show that, in the worst case, the proposed scheme is within 1/2 bit per transmit antenna of the asymptotic sum-capacity of the MIMO TWRC. For fading MIMO TWRCs with i.i.d. Gaussian coefficients, we derive a closed-form expression of the average sum-rate of the proposed scheme using large system analysis. Our analytical result shows that, for a large system with nT nR=1/2, the proposed scheme is less than 0.16 bit per transmit antenna away from the capacity. Furthermore, this gap reduces as nT nR increases, and vanishes as nT nR tends to 1. It is demonstrated that the proposed scheme can significantly outperform other existing schemes in the literature. © 2012 IEEE.

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