2025, Vol. 6, Issue 2, Part B

The aim of this research is to improve the power efficiency of user-centered cells massive MIMO networks. Consider a coverage area where, instead of creating independent cells, each cellular service is linked to a wireless access point chosen based on its needs. This results in a user-centric network architecture that solves many of the problems of interference and variations in quality of service that may occur in cellular networks. This concept of massive MIMO networks without user- centric cells is rooted in the interrelationship of three technologies, namely massive MIMO technology, coordinated multipoint processing, and ultra-large networks ^[3]. The main challenge is to achieve the benefits of cell-free operation in a simple way despite the computational complexity that can be used for large networks with many mobile devices.

The research method of this research is that the simulation and data analysis of massive MIMO networks will be implemented in the MATLAB software environment.

In this search, the effect of using multi-input and multi-output antennas in order to transmit information simultaneously for different applications in order to reduce the transmitted power and thus improve the efficiency of the system, as well as by introducing different available methods for modulation and modulation of the transmitted message. Finally, the OFDM modulation of information transmission is discussed in detail and the results of its simulations are presented.

as a result. And we also discuss the spectral efficiency (SE) of networks using NOMA and its relationship with energy efficiency (EE). The results were presented, simulated and compared with OFDMA modulation results.