Outage Probability of Amplify-and-Forward Two-Way Relay Interference-Limited Systems
Outage Probability of Amplify-and-Forward Two-Way Relay Interference-Limited Systems
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DOI：
10.1109/tvt.2012.2201514
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发表时间：
2012-05
影响因子：
6.8
通讯作者：
Xuesong Liang;Shi Jin;Wenjin Wang;Xiqi Gao;Kai‐Kit Wong
中科院分区：
文献类型：
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作者：
Xuesong Liang;Shi Jin;Wenjin Wang;Xiqi Gao;Kai‐Kit Wong
研究了干扰受限情况下采用放大转发策略的双向中继信道的中断性能。推导了不同功率干扰环境下系统中断概率的精确积分表达式。给出了系统中断概率的下界和近似解的封闭形式。当中继站的发射功率较大时，在考虑干扰影响的情况下，得到了终端间的最优功率分配。数值结果表明，当中继的发射功率小于源端的发射功率时，该下界能很好地工作;而当中继的发射功率大于源端的发射功率时，该近似能很好地满足一般情况下的精确结果，特别是在干扰受限系统中.
This paper studies the outage performance for a two-way relay channel using amplify-and-forward (AF) strategy in interference-limited scenarios. The exact integral-form expression for the system outage probability is derived under distinct-power interference environments. The lower bound and the approximation for the outage probability are also derived in closed form. The optimal power allocation between terminals is obtained in the case when the transmit power of the relay is large and when the effect of interference is discussed. Numerical results demonstrate that the lower bound works well in situations where the transmit power of the relay is smaller than that of the source terminals, whereas the approximation fits perfectly with the exact results in general situations and particularly when the power of the relay is larger than that of the source terminals in interference-limited systems.