Modified Newton’s Method in Massive MIMO Demodulation with non-Gaussian Approximation

The realities of modern mobile communications with tangible changes in the needs and expectations of subscribers lead to the need of demodulation algorithms with good noise immunity characteristics and acceptable computational complexity for practical use in systems with large number of antennas (Massive MIMO). The application of a non-Gaussian approximation of the a priori distribution of the estimated parameters for Massive MIMO systems demodulation using the modified Newton method is proposed. A study of a new algorithm was carried out under conditions of a different number of antennas and different types of modulation. The results of studying the noise immunity characteristics of the modified Newton’s method are presented, and a comparison is made with the well-known MMSE algorithm, which confirm the effectiveness of the proposed approach of non-Gaussian approximation and the modified Newton’s method for demodulation in Massive MIMO systems.