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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Link selection based on switching between full-duplex and half-duplex modes

  • Kim, Sangchoon (Department of Electronics Engineering, Dong-A University)
  • Received : 2019.05.20
  • Accepted : 2019.08.14
  • Published : 2020.02.07
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Abstract

Multiple-input multiple-output systems can achieve a full sum rate (SR) via full duplex (FD). However, its performance is degraded by self-interference (SI) that occurs between the transmitter and receiver at the same node and thus is constrained by error floors. Conversely, half duplex (HD) can avoid the SI albeit at lower spectral efficiency, and the slope of its error curve is determined by the diversity order. In this study, a link selection scheme based on switching between FD and HD is examined as a simple method to improve the bit error rate (BER) performance of FD systems. In the proposed link selection algorithm, either FD or HD is selected based on the received minimum distance and signal-to-interference plus noise ratio. Simulation results indicate that the proposed hybrid FD/HD switching system offers significant BER performance improvement when compared with that of the conventional FD and FD based on only the received minimum distance under the same fixed SR. Under relatively sufficient SI cancellation, it is demonstrated to outperform the HD with a diversity advantage in low and medium signal-to-noise ratio region.

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References

  1. B. P. Day et al., Full-duplex bidirectional MIMO: Achievable rates under limited dynamic range, IEEE Trans. Signal Process. 60 (2012), no. 7, 3702-3713. https://doi.org/10.1109/TSP.2012.2192925
  2. M. Duarte and A. Sabharwal. Full-duplex wireless communications using off-the-shelf radios: feasibility and first results, in Proc. Asilomar Conf. Signals, Syst., Comput., Pacific Grove, CA, USA, Nov. 2010, pp. 1558-1562.
  3. M. Jain et al., Practical, real-time, full-duplex wireless, in Proc. of MobiCom ACM, Las Vegas, NV, USA, Sept. 2011, pp. 301-312.
  4. B. Radunovic et al., Rethinking indoor wireless: Low power, low frequency, full duplex, Microsoft Res., Microsoft Corp., Redmond, WA, USA, Tech. Rep., 2009.
  5. M. Duarte et al., Design and characterization of a full-duplex multi-antenna system for WiFi networks, IEEE Tran. Veh. Techol. 63 (2014), no. 3, 1160-1177. https://doi.org/10.1109/TVT.2013.2284712
  6. N. Mahmood et al., Full duplex communications in 5G small cells, in Proc. 13th Int. Wireless Commun. Mobile Comput. Conf. (IWCMC), Valencia, Spain, June 2017, pp. 1665-1670.
  7. M. Zhou et al., Transmit-receive antenna pair selection in full duplex systems, IEEE Wireless Commun. Lett. 3 (2014), no. 1, 34-37. https://doi.org/10.1109/WCL.2013.110713.130711
  8. M. Zhou et al., Simultaneous bidirectional link selection in full duplex MIMO systems, IEEE Trans. Wireless Commun. 14 (2015), no. 7, 4052-4062. https://doi.org/10.1109/TWC.2015.2416187
  9. I. Krikidis et al., Full-duplex relay selection for amplify-and-forward cooperative networks, IEEE Trans. Wireless Commun. 11 (2012), no. 12, 4381-4393. https://doi.org/10.1109/TWC.2012.101912.111944
  10. S. Li et al., X-duplex relaying: Adaptive antenna configuration, IEEE Commun. Lett. 21 (2017), no. 5, 1083-1086. https://doi.org/10.1109/LCOMM.2017.2660492
  11. S. Li et al., On the performance of X-duplex relaying, IEEE Trans. Wireless Commun. 16 (2017), no. 3, 1868-1880. https://doi.org/10.1109/TWC.2017.2656887
  12. C. Yao, L. Song, and Y. Li, X-duplex radios: Flexible switching between full-duplex and half-duplex, IEEE Commun. Lett. 7 (2018), no. 1, 94-97. https://doi.org/10.1109/LWC.2017.2756052
  13. X. Huang et al., Opportunistic resource scheduling for LTE-unlicensed with hybrid communications modes, IEEE Access 6 (2018), 47857-47869. https://doi.org/10.1109/ACCESS.2018.2867427
  14. A. Sabharwal et al., In-band full-duplex wireless: Challenges and opportunities, IEEE J. Sel. Areas Commun. 39 (2014), no. 9, 1637-1652. https://doi.org/10.1109/JSAC.2014.2330193
  15. A. Masmoudi and T. Le-Ngoc, Channel estimation and self-interference cancellation in full-duplex communication systems, IEEE Tran. Veh. Techol.vol. 66 (2017), no. 1, 321-334. https://doi.org/10.1109/TVT.2016.2540538