TY - GEN
T1 - Bi-directional multi-antenna relay communications with wireless network coding
AU - Yuen, Chau
AU - Chin, Woon Hau
AU - Guan, Yong Liang
AU - Chen, Wenhua
AU - Tee, Taoyi
PY - 2008
Y1 - 2008
N2 - In this paper, we consider a two-way or bidirectional communications system with a relay equipped with multiple antennas. We show that when the downlink channel state information is not known at the relay, the benefit of having additional antennas at the relay can only be obtained by using decode and forward (DF) but not amplify and forward (AF). The gain becomes significant when we employ transmit diversity together with wireless network coding. We also demonstrate how the performance of such system can be improved by performing antenna selection at the relay. Our results show that if downlink channel state information is known at the relay, network coding may not provide additional gain than simple antenna selection scheme.
AB - In this paper, we consider a two-way or bidirectional communications system with a relay equipped with multiple antennas. We show that when the downlink channel state information is not known at the relay, the benefit of having additional antennas at the relay can only be obtained by using decode and forward (DF) but not amplify and forward (AF). The gain becomes significant when we employ transmit diversity together with wireless network coding. We also demonstrate how the performance of such system can be improved by performing antenna selection at the relay. Our results show that if downlink channel state information is known at the relay, network coding may not provide additional gain than simple antenna selection scheme.
KW - Multi-antenna relay
KW - Transmit diversity
KW - Two-way or bidirectional communications
KW - Wireless network coding
UR - http://www.scopus.com/inward/record.url?scp=47749092849&partnerID=8YFLogxK
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U2 - 10.1109/VETECS.2008.291
DO - 10.1109/VETECS.2008.291
M3 - Conference contribution
AN - SCOPUS:47749092849
SN - 9781424416455
T3 - IEEE Vehicular Technology Conference
SP - 1385
EP - 1388
BT - 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC
T2 - 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC
Y2 - 11 May 2008 through 14 May 2008
ER -