On the feasibility of full-duplex relaying in the presence of loop interference
On the feasibility of full-duplex relaying in the presence of loop interference
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DOI：
10.1109/spawc.2009.5161790
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
T. Riihonen;S. Werner;R. Wichman;E. Zacarias B.
中科院分区：
文献类型：
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作者：
T. Riihonen;S. Werner;R. Wichman;E. Zacarias B.
我们考虑了一种具有三种传输功率分配方法的基于两跳基础设施的中继链路。研究了放大转发协议和解码转发协议。基本上，继电器可以在全双工或半双工模式下工作。在全双工中继中，由于中继输出到中继输入的环路干扰，导致性能下降。另一方面，半双工模式消除了环路干扰，但这降低了端到端速率。本文从端到端容量的角度研究了全双工模式的可行性。特别是，我们评估了盈亏平衡环路干扰水平，低于该水平，全双工模式优于半双工模式。分析表明，在较高的环路干扰功率存在的情况下，全双工模式是可行的，并且可以提供比半双工模式更高的容量。
We consider a two-hop infrastructure-based relay link with three transmit power allocation methods. Both amplify-and-forward and decode-and-forward protocols are studied. Fundamentally, a relay can operate either in a full-duplex or in a half-duplex mode. The performance in full-duplex relaying is degraded due to loop interference from the relay output to the relay input. On the other hand, the half-duplex mode eliminates the loop interference, but this reduces the end-to-end rate. In this paper, we study the feasibility of the full-duplex mode in terms of end-to-end capacity. In particular, we evaluate break-even loop interference levels, below which the full-duplex mode outperforms the half-duplex mode. The analysis shows that the full-duplex mode is feasible in the presence of reasonably high loop interference power and can offer higher capacity than the half-duplex mode.