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Исследование влияния сжатия CSI на эффективность MU-MIMO в условиях временной эволюции канала
The Multi-User Multiple Input Multiple Output (MU-MIMO) technology allows increasing the channel throughput. However, MU-MIMO efficiency is reduced by overhead induced by frequent channel sounding and transmission of channel feedback frames. This paper examines the problems of channel state information (CSI) compression in Wi-Fi networks using MU-MIMO with channel aging. The research aims to experimentally test the efficiency of MU-MIMO technology in real use cases, taking into account channel sounding procedures and CSI feedback transmission. Using an experimental setup, we record the channel to analyze its behavior and the evolution of the signal received power under different conditions. In addition, we explore the applicability limits of the TGax MU-MIMO channel model in the WLAN Toolbox by comparing it with the experimental results. The findings of this study are particularly useful in optimizing MU-MIMO performance under channel time evolution and CSI compression.