Formación de haz híbrido en un sistema MIMO masivo

Abstract

This paper details the design and simulation of a hybrid beamforming system in a massive MIMO (multiple input-multipleoutput) system. The main objective of this technology is to generate high spectral efficiency and avoid propagation loss at high frequencies, which is reflected in the 5G physical layer. Unlike conventional MIMO systems, data flows are dispersed in different directions causing interference in the system and reducing the speed of information transmission, where signal processing is carried out through a digital or analog architecture that are designed using the URA (Uniform Rectangular Array) algorithm. The hybrid analog-digital signal processing or known as Hybrid Beamforming has as main characteristic to decrease the cost, power consumption and reduce interference. It is used for beamforming, based on the OMP (Orthogonal Matching Pursuit) algorithm in a system where the two users have a large number of antennas that are operated by a limited number of radio frequency chains in both the transmitter and receiver. The results show the comparison of the radiation pattern of two systems both conventional and hybrid taking as reference the spectral efficiency as a performance indicator.