Estudio y análisis de las tecnologías aplicadas en la interfaz aire de las comunicaciones móviles de 5G.
This research is developed around the fifth generation mobile communications, as the network infrastructure evolves, it is also expected an increase in the capabilities offered to users. These characteristics fall especially on the development of the physical layer of 5G NR networks, which is develo...
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| Format: | bachelorThesis |
| Language: | spa |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://dspace.unl.edu.ec/jspui/handle/123456789/24659 |
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Add Tag | Summary: | This research is developed around the fifth generation mobile communications, as the network infrastructure evolves, it is also expected an increase in the capabilities offered to users. These characteristics fall especially on the development of the physical layer of 5G NR networks, which is developed through the different technologies that are applied in the radio interface, therefore, the analysis of each of the technologies and basic fundamentals are developed over three chapters. The first chapter reviews the theoretical foundations of the evolution of the technologies implemented from the first to the fourth generation, together with the basic architecture for the implementation of 5G. The second chapter starts with the development of the methodology focused on millimeter waves (mmWave) where, by means of the representation in the NYUSIM software, the main data of the channel model such as path losses and received powers are extracted from the point of view of different scenarios (UMi, UMa, RMa and InH). Finally, the third chapter develops the basics of the technologies applied in the radio interface, including waveforms, modulation, coding and multiple access techniques, together with the antenna system required for 5G deployment. The results using NYUSIM software comprise the mmWave behavior, where the losses will be proportional to the distance of the user equipment and according to the human blocking model. In terms of received power, it remains in an optimal range, characteristic for 5G. In the technologies applied at the interface, OFDMA remains the favorite multiple access technique; however, the development of NOMA is emerging as a good candidate, as is GFDM as a waveform technique, since it mainly overcomes the limitations of FBMC or UFMC. Regarding modulation schemes, although the recommended scheme is 256 QAM, the possibility of 1024 QAM creates a great expectation. In the same way, polar codes and LDPC as techniques to correct errors that are produced in the information channel, this within the coding processes developed for 5G. The reports and technical specifications of 3GPP Release 16 are highlighted, the recommendations generated involve the technologies analyzed to comply with the main key performance indicators of 5G. Additionally, Cognitive Radio is analyzed as one of the emerging technologies to improve parameters or limitations of current technologies. Keywords: 5G, Release 16, Nyusim, mmWave, multiple access, channel coding. |
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