TY - GEN
T1 - Optimal transmit strategies in multi-antenna bidirectional relaying
AU - Oechtering, Tobias J.
AU - Boche, Holger
PY - 2007
Y1 - 2007
N2 - We study the transmit strategies in a MIMO bidirectional relaying scenario with individual power constraints. In two phases a half-duplex relay node decodes-and-forwards the signals of two nodes. Each node has multiple antennas. We deduce the transmit strategy in the first phase from the general Gaussian MIMO-MAC. Since each node knows a priori the interference of its own message in the second phase interference-free reception is achieved. Therefore, the optimal relay transmit strategy is given by two point-to-point water-filling solutions which are coupled by the relay power distribution. In the large SNR, the sum of any bidirectional rate tuple on the boundary of the rate region is asymptotically proportional with the minimum spatial degree of both MIMO channels.
AB - We study the transmit strategies in a MIMO bidirectional relaying scenario with individual power constraints. In two phases a half-duplex relay node decodes-and-forwards the signals of two nodes. Each node has multiple antennas. We deduce the transmit strategy in the first phase from the general Gaussian MIMO-MAC. Since each node knows a priori the interference of its own message in the second phase interference-free reception is achieved. Therefore, the optimal relay transmit strategy is given by two point-to-point water-filling solutions which are coupled by the relay power distribution. In the large SNR, the sum of any bidirectional rate tuple on the boundary of the rate region is asymptotically proportional with the minimum spatial degree of both MIMO channels.
KW - Bidirectional relaying
KW - Decode-and-forward
KW - MIMO system
KW - Mobile communication
KW - Optimal transmit strategy
UR - http://www.scopus.com/inward/record.url?scp=34547521765&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2007.366493
DO - 10.1109/ICASSP.2007.366493
M3 - Conference contribution
AN - SCOPUS:34547521765
SN - 1424407281
SN - 9781424407286
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 145
EP - 148
BT - 2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07
Y2 - 15 April 2007 through 20 April 2007
ER -