Abstract
This paper considers a massive multiple-input multiple-output (MIMO) aided multipair relay network with virtual full-duplex relaying, where multiple single-antenna sources transmit signals to single-antenna destinations via two massive MIMO relays. The two half-duplex relay nodes work in virtual full-duplex relaying mode that transmit and receive signals in turn. We investigate the sum-rate performance of multipair virtual full-duplex relaying with simple maximum ratio combination and maximum ratio transmission at the relays, and derive closed-form expressions for the asymptotic signal-to-interference-plus-noise ratios when the numbers of relay antennas go infinite. We also compare the sum-rate performance of virtual full-duplex relaying with real full-duplex and conventional half-duplex relaying schemes. Both analytical and numerical results show that virtual full-duplex relaying with massive antenna arrays can achieve the same performance as real full-duplex relaying in symmetric multipair networks, and significantly outperform its half-duplex counterpart.
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Acknowledgements
The work in this paper was supported by the Natural Science Foundation of China under Grant No. 61401400, the Natural Science Foundation of Zhejiang Province under Grant No. LY17F010002, the Natural Science Foundation of Ningbo City under Grant No. 2017A610101, and the public welfare project of Zhejiang Province under Grant No. 2016C33036.
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Fang, Z., Shao, P., Chen, J. et al. Multipair Virtual Full Duplex Relaying with Massive MIMO. Wireless Pers Commun 109, 1699–1711 (2019). https://doi.org/10.1007/s11277-019-06647-w
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DOI: https://doi.org/10.1007/s11277-019-06647-w