Engenharia Elétrica

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http://repositorio.ufes.br/handle/10/17617
Programa de Pós-Graduação em Engenharia Elétrica

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URL do programa: https://engenhariaeletrica.ufes.br/pt-br/pos-graduacao/PPGEE

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Navegando Engenharia Elétrica por Assunto "5G New Radio"

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    Performance evaluation of a 5G-based hybrid visible light and radio frequency communication system
    (Universidade Federal do Espírito Santo, 2024-04-15) Peterle, Augusto Cesar Federici; Rocha, Helder Roberto de Oliveira ; https://orcid.org/0000-0001-6215-664X; http://lattes.cnpq.br/8801325729735529; Silva, Jair Adriano Lima ; https://orcid.org/0000-0003-2567-184X; http://lattes.cnpq.br/3099010533644898; https://orcid.org/0000-0002-0721-7961; http://lattes.cnpq.br/4571361530604610; Segatto, Marcelo Eduardo Vieira; https://orcid.org/0000-0003-4083-992X; http://lattes.cnpq.br/2379169013108798; Pohl, Alexandre de Almeida Prado; https://orcid.org/0000-0003-1300-4679; http://lattes.cnpq.br/9118815178885363
    The development of 5G is an ongoing process and annually release are published by 3GPP considering fundamental aspects such as network’s physical layer, numerology, bandwidth, modulation, among others. For new releases, a rapid prototyping is valuable for experimental demonstrations and proof-of-concepts. The usage of the Software-Defined Radio (SDR) technology is advantageous as it allows the implementation of modulation and demodulation procedures in software, enabling performance evaluations in various physical mediums, for instance both optical and Radio Frequency (RF). Besides the prototyping need, the growing congestion and limitation of the RF spectrum have led to exploring alternative communication mediums. Visible Light Communication (VLC) technology has emerged as a solution, utilizing an unlicensed optical spectrum without substantial communication competition. The rise in popularity of Light Emitting Diodes (LEDs) for residential and commercial lighting supports this idea, as LEDs can be controlled and employed as information transmitters and its low power consumption. To this aim, studies regarding optical communication and Orthogonal Frequency Division Multiplexing (OFDM), as well as an in-depth explanation of 5G New Radio (NR) numerol ogy were conducted. Therefore, a prototype was prepared and assembled for 5G NR signals generation for downlink via VLC, and for uplink via RF. The experimental results indicated that the coding techniques outlined by 5G NR integrate well with VLC, enabling the use of modulation levels up to 64-QAM. This outcome facilitated error-resistant communication for the transmitted data volume, showcasing a robust hybrid VLC/RF system capable of successfully supports relatively high data rates
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    Technologies for modern optical networks: prototyping and testing
    (Universidade Federal do Espírito Santo, 2025-02-19) Santos, Caio Marciano; Pontes, Maria Jose ; https://orcid.org/0000-0002-9009-2425; http://lattes.cnpq.br/4148956242627659; Segatto, Marcelo Eduardo Vieira; https://orcid.org/0000-0003-4083-992X; http://lattes.cnpq.br/2379169013108798; https://orcid.org/0000-0001-8237-357X; http://lattes.cnpq.br/5060786623885022; Silva, Jair Adriano Lima; https://orcid.org/; http://lattes.cnpq.br/3099010533644898; Rocha, Helder Roberto De Oliveira; https://orcid.org/0000-0001-6215-664X; http://lattes.cnpq.br/8801325729735529; Araújo, Murilo Romero; https://orcid.org/0000-0002-2312-7253; http://lattes.cnpq.br/4009508060687531; Nunes, Reginaldo Barbosa ; https://orcid.org/0000-0001-8877-1480; http://lattes.cnpq.br/0301147577506989
    Optical recirculation loops are essential tools in the study of long-haul optical fiber communication systems. The technique allows light to travel for multiple rounds through f iber spans, simulating extended transmission distances without the need for physically long fiber setups. As a laboratory tool, it is particularly useful for investigating the effects of amplifier noise and optical nonlinearity in long-haul links. In other contexts, it is widely used for validating and designing submarine networks, these of which are crucial to our modern networks, bringing connectivity across the globe. The advent of 5G technology, combined with Optical Wireless Systems (OWS), promises to revolutionize communication networks. 5G offers unprecedented transmission rates and connectivity, while OWS provides a complementary solution for high-capacity, short-range communication. Together, they enable a wide range of applications, from enhanced mobile broadband to ultra-reliable low-latency communications, supporting the growing demand for data and connectivity in smart cities and industrial automation. 5G New Radio (NR) represents the global standard for the air interface of 5G networks, developed by the 3rd Generation Partnership Project (3GPP). Using advanced technolo gies such as orthogonal frequency division multiplexing (OFDM), massive MIMO, and beamforming to deliver lower latency, higher capacity, and improved spectral efficiency. 5G NR supports a wide range of frequency bands and deployment modes, making it a versatile and scalable solution for future wireless communication needs. When merging recirculation loops with 5G technology and standardization, a robust OWS is created, capable of delivering signals in the most vast environments. Thus, this work presents the design, execution, and validation of a recirculation loop prototype, as well as the validation of a 5G antenna prototype developed by a third party. With the standalone loop, distances of up to 100, 600, 900 and 1400 km are achieved at 3.65, 2.94, 2.21, and 1.47 Gb/s, respectively. In the OWS containing the loop and the antenna prototype, distances of up to 100 km and 500 km for 1.94 and 1.46 Gb/s, respectively. Finally, for a 5G NR OWS operating within the FR1 n77 band, with a total of 450 MHz allocated for four individual 100 MHz channels, transmission distances of 400 km for channel 1, and 500 km for channels 2 to 3 were obtained with a raw rate of 229.5 Mb/s per channel.