TY - GEN
T1 - Physical-layer MIMO relaying
AU - Khina, Anatoly
AU - Kochman, Yuval
AU - Erez, Uri
PY - 2011
Y1 - 2011
N2 - The physical-layer network coding (PNC) approach provides improved performance in many scenarios over "traditional "relaying techniques or network coding. This work addresses the generalization of PNC to wireless scenarios where network nodes have multiple antennas. We use a recent matrix decomposition, which allows, by linear pre- and post-processing, to simultaneously transform both channel matrices to triangular forms, where the diagonal entries, corresponding to both channels, are equal. This decomposition, in conjunction with precoding, allows to convert any two-input multiple-access channel (MAC) into parallel MACs, over which single-antenna PNC may be used. The technique is demonstrated using the two-way relay channel with multiple antennas. For this case it is shown that, in the high signal-to-noise regime, the scheme approaches the cut-set bound, thus establishing the asymptotic network capacity.
AB - The physical-layer network coding (PNC) approach provides improved performance in many scenarios over "traditional "relaying techniques or network coding. This work addresses the generalization of PNC to wireless scenarios where network nodes have multiple antennas. We use a recent matrix decomposition, which allows, by linear pre- and post-processing, to simultaneously transform both channel matrices to triangular forms, where the diagonal entries, corresponding to both channels, are equal. This decomposition, in conjunction with precoding, allows to convert any two-input multiple-access channel (MAC) into parallel MACs, over which single-antenna PNC may be used. The technique is demonstrated using the two-way relay channel with multiple antennas. For this case it is shown that, in the high signal-to-noise regime, the scheme approaches the cut-set bound, thus establishing the asymptotic network capacity.
KW - MIMO channels
KW - multiple access channel
KW - nested lattices
KW - network capacity
KW - network modulation
KW - physical-layer network coding
KW - structured codes
KW - two-way relay channel
UR - http://www.scopus.com/inward/record.url?scp=80054817636&partnerID=8YFLogxK
U2 - 10.1109/ISIT.2011.6034002
DO - 10.1109/ISIT.2011.6034002
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AN - SCOPUS:80054817636
SN - 9781457705953
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 2437
EP - 2441
BT - 2011 IEEE International Symposium on Information Theory Proceedings, ISIT 2011
T2 - 2011 IEEE International Symposium on Information Theory Proceedings, ISIT 2011
Y2 - 31 July 2011 through 5 August 2011
ER -