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arXiv · 1708.00742

Multipair Massive MIMO Two-Way Full-Duplex Relay Systems with Hardware Impairments

Ying Liu·Xipeng Xue·Jiayi Zhang·Xu Li·Linglong Dai·Shi Jin
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Abstract

Hardware impairments, such as phase noise, quantization errors, non-linearities, and noise amplification, have baneful effects on wireless communications. In this paper, we investigate the effect of hardware impairments on multipair massive multiple-input multiple-output (MIMO) two-way full-duplex relay systems with amplify-and-forward scheme. More specifically, novel closed-form approximate expressions for the spectral efficiency are derived to obtain some important insights into the practical design of the considered system. When the number of relay antennas $N$ increases without bound, we propose a hardware scaling law, which reveals that the level of hardware impairments that can be tolerated is roughly proportional to $\sqrt{N}$. This new result inspires us to design low-cost and practical multipair massive MIMO two-way full-duplex relay systems. Moreover, the optimal number of relay antennas is derived to maximize the energy efficiency. Finally, Motor-Carlo simulation results are provided to validate our analytical results.

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Ying Liu, Xipeng Xue, Jiayi Zhang, Xu Li, Linglong Dai, Shi Jin. 2017-08-02. Multipair Massive MIMO Two-Way Full-Duplex Relay Systems with Hardware Impairments. https://arxiv.org/abs/1708.00742

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