Title :
Bi-Directional Multi-Antenna Relay Communications with Wireless Network Coding
Author :
Yuen, Chau ; Chin, Woon Hau ; Guan, Yong Liang ; Chen, Wenhua ; Tee, Taoyi
Author_Institution :
Inst. for Infocomm Res. (I2R), Singapore
Abstract :
In this paper, we consider a two-way or bi-directional 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.
Keywords :
antenna arrays; encoding; radio links; radio networks; transmitting antennas; antenna selection scheme; bidirectional multiantenna relay communication; downlink channel state information; transmit diversity; wireless network coding; Bidirectional control; Channel state information; Communication system traffic; Communication systems; Decoding; Downlink; Network coding; Relays; Transmitting antennas; Wireless networks;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.291