A New Approach to Problems of MIMO Detection and Multiuser Demodulation

In this study, we present the results of theoretical analysis and computer simulation of the application of non-Gaussian approximation in demodulation problems in MIMO systems. The results of this study can also be applied in multiuser demodulation problems in systems with non-orthogonal signals. As a result of theoretical analysis, an approximation of a priori distribution of the estimated parameters, as well as a theoretical justification for the application of methods for solving systems of linear and nonlinear equations in solving the problem of demodulation in multi-user systems, were proposed. The results of modeling by the Monte Carlo method, as well as comparison with known demodulation algorithms for MIMO systems, which confirm the effectiveness of the proposed theoretical approach of non-Gaussian approximation for additional consideration of a priori information during demodulation, are presented.