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Alternating-Projection-Based Channel Estimation for Multicell Massive MIMO Systems

  • Chen, Yi Liang (Mandu Company) ;
  • Ran, Rong (Department of Electrical and Computer Engineering, Ajou University) ;
  • Oh, Hayoung (Department of Software Engineering, Ajou University)
  • Received : 2018.03.05
  • Accepted : 2018.03.23
  • Published : 2018.03.31

Abstract

In massive multiple-input multiple-output (MIMO) systems, linear channel estimation algorithms are widely applied owing to their simple structures. However, they may cause pilot contamination, which affects the subsequent data detection performance. Therefore, herein, for an uplink multicell massive multiuser MIMO system, we consider using an alternating projection (AP) for channel estimation to eliminate the effect of pilot contamination and improve the performance of data detection in terms of the bit error rates as well. Even though the AP is nonlinear, it iteratively searches the best solution in only one dimension, and the computational complexity is thus modest. We have analyzed the mean square error with respect to the signal-to-interference ratios for both the cooperative and non-cooperative multicell scenarios. From the simulation results, we observed that the channel estimation results via the AP benefit the following signal detection more than that via the least squares for both the cooperative and non-cooperative multicell scenarios.

Keywords

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Fig. 1. Performance comparison between ZF with AP-based channel

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Fig. 2. Performance comparison between ZF with CSI via AP and ZF with

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Fig. 3. BER comparison between ZF with AP and ZF with LS for different

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Fig. 4. BER comparison between ZF with AP and ZF with LS for different

References

  1. E. G. Larsson, O. Edfors, F. Tufvesson, and T. Marzetta, "Massive MIMO for next generation wireless systems," IEEE Communications Magazine, vol. 52, no. 2, pp. 186-195, 2014. DOI: 10.1109/MCOM.2014.6736761.
  2. F. Rusek, D. Persson, B. K. Lau, E. G. Larsson, T. L. Marzetta, O. Edfors, and F. Tufvesson, "Scaling up MIMO: opportunities and challenges with very large arrays," IEEE Signal Processing Magazine, vol. 30, no. 1, pp. 40-46, 2014. DOI: 10.1109/MSP.2011.2178495.
  3. H. Q. Ngo, E. G. Larsson, and T. L. Marzetta, "Energy and spectral efficiency of very large multiuser MIMO systems," IEEE Transactions on Communications, vol. 61, no. 4, pp. 1436-1449, 2012. DOI: 10.1109/TCOMM.2013.020413.110848.
  4. K. Appaiah, A. Ashikhmin, and T. L. Marzetta, "Pilot contamination reduction in multi-user TDD systems," in Proceedings of IEEE International Conference on Communications, Cape Town, South Africa, pp. 1-5, 2010. DOI: 10.1109/ICC.2010.5502810.
  5. J. Jose, A. Ashikhmin, and T. L. Marzetta, "Pilot contamination and precoding in multi-cell TDD systems," IEEE Transactions on Wireless Communications, vol. 10, no. 8, pp. 2640-2651, 2011. DOI: 10.1109/TWC.2011.060711.101155.
  6. A. Ashiknmin and T. L. Marzetta "Pilot contamination precoding in multi-cell large scale antenna systems," in Proceedings of IEEE International Conference on Information Theory Proceedings, Cambridge, MA, pp. 1137-1141, 2012. DOI: 10.1109/ISIT.2012.6283031.
  7. L. Cottatellucci, R. R. Muller, and M. Vehkapera, "Analysis of pilot decontamination based on power control," in Proceedings of IEEE 77th Vehicular Technology Conference (VTC Spring), Dresden, Germany, pp. 1-5, 2013. DOI: 10.1109/VTCSpring.2013.6691891.
  8. A. Khlifi and R. Bouallegue, "Performance analysis of LS and LMMSE channel estimation techniques for LTE downlink systems," International Journal of Wireless & Mobile Networks, vol. 3, no. 5, pp. 141-149, 2011. DOI: 10.5121/ijwmn.2011.3511.
  9. R. R. Muller, L. Cottatellucci, and M. Vehkapera, "Blind pilot decontamination," IEEE Journal of Selected Topics in Signal Processing, vol. 8, no. 5, pp. 773-786, 2014. DOI: 10.1109/JSTSP.2014.2310053.
  10. I. Ziskind and M. Wax, "Maximum likelihood localization of multiple sources by alternating projection," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 36, no. 10, pp. 1553-1560, 1988. DOI: 10.1109/29.7543.
  11. Y. Chen, R. Ran, and S. Oh, "Performance analysis for pilot decontamination of massive MIMO using alternative projection," in Proceedings of IEEE International Conference on Ubiquitous and Future Networks, Vienna, Austria, pp. 297-300, 2016. DOI: 10.1109/ICUFN.2016.7537036.
  12. A. Roessler, J. Schlienz, S. Merkel, and M. Kottkamp, "LTEAdvanced (3GPP Rel. 11) technology introduction," Rohde & Schwarz GmbH, White Paper, 2013.