Optimal Duplex Mode for DF Relay in Terms of the Outage Probability
Optimal Duplex Mode for DF Relay in Terms of the Outage Probability
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DOI：
10.1109/tvt.2010.2050503
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发表时间：
2010-09-01
影响因子：
6.8
通讯作者：
Hong, Daesik
中科院分区：
文献类型：
--
作者：
Kwon, Taehoon;Lim, Sungmook;Hong, Daesik
研究了瑞利衰落信道下的全双工中继系统。推导了考虑全双工干扰时FDR中断概率的精确表达式。然后，我们得到的信号噪声比（SNR）和信号接口比（SIR）的情况下，FDR显示出较低的中断概率比半双工中继（HDR）系统的目标中断概率。根据该条件，FDR在低SNR区域中而不是在高SNR区域中具有较低SIR的情况下优于HDR上级。此外，只有当SNR和SIR在边界内时，才满足目标中断概率。这些边界由于目标速率、每个链路的信道状态和目标中断概率而变化。
This paper deals with a full-duplex relay (FDR) system over Rayleigh fading channels. The exact outage probability of FDR is derived as a closed form to consider interferences from full duplex. Then, we obtain the conditions of the signal-to-noise ratio (SNR) and the signal to interface ratios (SIRs) for cases of FDR showing a lower outage probability than that of the half-duplex relay (HDR) system under the target outage probability. According to this condition, FDR is superior to HDR with lower SIRs in the low-SNR region rather than in the high-SNR region. In addition, the target outage probability is only satisfied when the SNR and SIRs are within the boundaries. These boundaries vary due to the target rate, the channel states of each link, and the target outage probability.