Spectral Efficiency of Multipair Massive MIMO Two-Way Relaying With Hardware Impairments
Spectral Efficiency of Multipair Massive MIMO Two-Way Relaying With Hardware Impairments
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DOI：
10.1109/lwc.2017.2750162
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发表时间：
2017-09
影响因子：
6.3
通讯作者：
Jiayi Zhang;X. Xue;Emil Björnson;B. Ai;Shi Jin
中科院分区：
文献类型：
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作者：
Jiayi Zhang;X. Xue;Emil Björnson;B. Ai;Shi Jin
我们考虑了一个多对大规模多输入多输出(MIMO)双向中继系统，其中多对单天线设备在采用大量天线的中继的帮助下交换数据。该继电器由遭受硬件损伤的低成本组件组成。给出了具有最大比处理的频谱效率的大尺度近似解，其紧致性为${N\to\infty}$。结果表明，对于固定的硬件质量，当${N}$变大时，硬件损伤的影响渐近消失。此外，如果满足比例定律，当硬件质量逐渐降低${N}$时，减值的影响甚至可能消失。最后，数值结果验证了多对大规模MIMO双向中继系统对中继端的硬件损伤具有较强的鲁棒性。
We consider a multipair massive multiple-input multiple-output (MIMO) two-way relaying system, where multiple pairs of single-antenna devices exchange data with the help of a relay employing a large number of antennas ${N}$ . The relay consists of low-cost components that suffer from hardware impairments. A large-scale approximation of the spectral efficiency with maximum ratio processing is derived in closed form, and the approximation is tight as ${N \to \infty }$ . It is revealed that for a fixed hardware quality, the impact of the hardware impairments vanishes asymptotically when ${N}$ grows large. Moreover, the impact of the impairments may even vanish when the hardware quality is gradually decreased with ${N}$ , if a scaling law is satisfied. Finally, numerical results validate that multipair massive MIMO two-way relaying systems are robust to hardware impairments at the relay.