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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Blind adaptive receiver for uplink multiuser massive MIMO systems

  • Shin, Joonwoo (Division of Navigation Science, Korea Maritime and Ocean University) ;
  • Seo, Bangwon (Division of Electrical, Electronics and Control Engineering, The Institute of IT Convergence Technology, Kongju National University)
  • Received : 2018.10.10
  • Accepted : 2019.05.20
  • Published : 2020.02.07
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Abstract

Herein, we consider uplink multiuser massive multiple-input multiple-output systems when multiple users transmit information symbols to a base station (BS) by applying simple space-time block coding (STBC). At the BS receiver, two detection filters for each user are used to detect the STBC information symbols. One of these filters is for odd-indexed symbols and the other for even-indexed symbols. Using constrained output variance metric minimization, we first derive a special relation between the closed-form optimal solutions for the two detection filters. Then, using the derived special relation, we propose a new blind adaptive algorithm for implementing the minimum output variance-based optimal filters. In the proposed adaptive algorithm, filter weight vectors are updated only in the region satisfying the special relation. Through a theoretical analysis of the convergence speed and a computer simulation, we demonstrate that the proposed scheme exhibits faster convergence speed and lower steady-state bit error rate than the conventional scheme.

Keywords

References

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