TY - GEN
T1 - A cooperative three-time-slot transmission in asymmetric two-way relay channels
AU - Wu, Dan
AU - Tian, Yafei
AU - Yang, Chenyang
PY - 2011
Y1 - 2011
N2 - In a two-way relay system where two nodes exchange information via a half-duplex relay, the achievable data rates of both directions are limited by the weaker link. When the two-way channel is asymmetric due to relay positioning or channel fading, the sum rate of the two-way relay system will suffer from severe degradation. In this paper, we propose a novel three time-slot cooperative transmission strategy in order to transmit at the maximum rate of each link, and therefore, to improve the sum rate of the two-way relay system. We obtain capacity region for the new strategy and derive an achievable rate region. Time slot allocation and power allocation at the relay are optimized to achieve the maximum sum rate. Simulation results show that the proposed strategy significantly outperforms existing transmission strategies under asymmetric channel conditions both in AWGN and Rayleigh fading channels.
AB - In a two-way relay system where two nodes exchange information via a half-duplex relay, the achievable data rates of both directions are limited by the weaker link. When the two-way channel is asymmetric due to relay positioning or channel fading, the sum rate of the two-way relay system will suffer from severe degradation. In this paper, we propose a novel three time-slot cooperative transmission strategy in order to transmit at the maximum rate of each link, and therefore, to improve the sum rate of the two-way relay system. We obtain capacity region for the new strategy and derive an achievable rate region. Time slot allocation and power allocation at the relay are optimized to achieve the maximum sum rate. Simulation results show that the proposed strategy significantly outperforms existing transmission strategies under asymmetric channel conditions both in AWGN and Rayleigh fading channels.
UR - https://www.scopus.com/pages/publications/80052015086
U2 - 10.1109/VETECS.2011.5956343
DO - 10.1109/VETECS.2011.5956343
M3 - 会议稿件
AN - SCOPUS:80052015086
SN - 9781424483310
T3 - IEEE Vehicular Technology Conference
BT - 2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring - Proceedings
T2 - 2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring
Y2 - 15 May 2011 through 18 May 2011
ER -