E.I. Glushankov1, S.G. Egorov2

1,2 St. Petersburg State University of Telecommunications named after prof. M.A. Bonch-Bruevich (St. Petersburg, Russia)

1 glushankov57@gmail.com; 2 sgegorov@gmail.com

One of the important problems in the development and design of multiple access radio systems with code division multiple access (CDMA), direct sequence code division multiple access (DS-CDMA), and quadrature amplitude modulation (QAM) is to specify the technical requirements for the linearity of group transmission paths. Overestimated requirements lead to significant system complexity, while underestimated requirements lead to deteriorated communication quality. Similar problems arise in the study of MIMO-type multi-antenna systems, widely used in modern communication systems.

Previous works [1, 2] have been devoted to the study of the interference resistance of the group video transmission path of CDMA systems. However, nonlinear distortions in the radio path can also lead to digital errors, so it is important to study both causes of the real interference resistance deterioration together. In this paper, the interference resistance of a multi-antenna system with various configurations of receiving and transmitting antennas is analyzed, taking into account the distortions that occur in the radio path.

Based on the conducted research, requirements can be formulated for the signal-to-noise ratio and the amplitude characteristics of multi-channel signal amplifiers.

Glushankov E.I., Egorov S.G. Investigating the impact of nonlinear distortions on MIMO system performance in radio channels. Radiotekhnika. 2025. V. 89. № 7. P. 156−163. DOI: https://doi.org/10.18127/j00338486-202507-25 (In Russian)

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