Sistema transmisión-recepción 5G usando la técnica de acceso no ortogonal NOMA con dispositivos de radio definida por software

Abstract

This paper addresses the issue of significant latency and lower user capacity of the access technique in the context of 5G OFDM (Orthogonal Frequency Division Multiplexing) wireless telecommunications compared to NOMA (Non-Orthogonal Multiple Access). This situation highlights the need to develop a more efficient communications system. To this end, a 5G transmit-receive communications system has been implemented using software defined radio (ADALM PLUTO) in the downlink and the NOMA technique, known for its ability to support up to three times more users in the same frequency band and reduce latency by 50% compared to OFDM [1]. The system was modeled and designed using MATLAB, a tool that allows simulating and analyzing various aspects of the system, including signal transmission and reception, wireless channel and NOMA algorithms. Specific NOMA algorithms were developed and optimized with the Adalm Pluto equipment, focusing on power and resource allocation to maximize system performance. This allowed evaluation of key metrics such as bit error rate (BER), system capacity, signal power and spectral efficiency. The results were presented in a user-friendly graphical interface, providing detailed information about the system behavior under practical conditions. The research question guiding this project is: What are the optimal parameters that allow the 5G transmit-receive system using NOMA with software defined radio devices to be a viable solution with respect to other access techniques?