CHEBYSHEV TYPE NONLINEAR ITERATIVE DEMODULATION ALGORITHM FOR MIMO SYSTEMS WITH LARGE NUMBER OF ANTENNAS
Vitaly B. Kreyndelin, Denis Yu. Pankratov, A. G. Stepanova · Telecommunications and Radio Engineering · 2020
Massive MIMO technology allows to obtain high energy efficiency and high spectral efficiency of the radio communication systems. This technology is planned to increase the capacity of 5G systems. However, there are some problems on the way of Massive MIMO application which are related to demodulation algorithms with high efficiency and low computational complexity. In this paper Chebyshev type nonlinear iterative demodulation algorithm for Massive MIMO system is proposed. Proposed nonlinear algorithm can be used for different types of modulation, it has polynomial complexity and doesn't require to calculate the eigenvalues of channel matrix. For the comparison of this algorithm with MMSE algorithm BER performance characteristics were obtained for different number of iterations. BER performance characteristics were obtained also for Chebyshev linear iterative demodulator with eigenvalues estimates of channel matrix.