Monografia_Sis_Tel

URI permanente para esta coleçãohttps://ri.ifam.edu.br/handle/4321/969

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Analisador de Espectro com Arduino na Faixa de Rádio FM para Fins Didáticos
(2020-10-26) Palheta, Harryson Barbosa; Frota, Vitor Bremgartner da; Frota, Vitor Bremgartner da; Fernandes, Priscila Silva; Silva, Nivaldo Rodrigues
This monograph presents the development of software that simulates a Spectrum Analyzer for didactic purposes made with Arduino and a TEA5767 FM radio shield in the frequency of 87.5 to 108 MHz, interacting with any personal computer. In addition to analyzing the project’s functionalities, comparing it with a real Spectrum Analyzer, or an oscilloscope with compatible function, and also comparing it with projects already published.
Avaliação de influência da precipitação pluviométrica na propagação de sinal de telefonia celular 4G LTE na cidade de Manaus-Am
(2020-01-17) Souza, Walcemir Aguiar de; Fontinelle, Carlos Gomes; Fontinelle, Carlos Gomes; Marães, Paula Araújo; Cordeiro, Celso Souza
According to Fisch (2002), the Amazon Region has an average rainfall of approximately 2300 mm, although it has regions where the annual total reaches 3500 mm. In their work, Figueroa and Nobre (1990) used 226 rainfall stations to identify the spatial and temporal distribution of rainfall in the Amazon region. This survey identified in detail the period of the year where rainfall occurs most frequently in the region, while the period of highest rainfall was identified between November and March. The city of Manaus, is located in the central part of the Amazon, Region that have high precipitation rates over 600 mm. This work was developed with the objective of analyzing the effects of these atmospheric precipitations on the signal propagation of the LTE 4G technology in the city, to identify areas of low coverage, since these failures are due to rapid rains, heavy rains or long term rainfall. Natural phenomena that frequently occur in the rainy season of the Amazon Region. Signal Prediction software installed on a notebook was used to collect this data received by the network access equipment, a modem enabled for web access and other services, and a Frequency Scanner was also used to collect the Gross Signal, the electromagnetic wave itself emitted by the Base Radio Stations (ERB) installed by the city of Manaus in several strategic points. Subsequently, a comparison was made of the measurements made in the environment with enough trees and few buildings with opposite climatic conditions, intense rains and intense sun. The chosen location of the first comparative analysis is located in the neighborhood of Santa Etelvina, chosen for analysis of aerial images of the city of Manaus with the Free Software Google EARTH. The second location chosen for the comparative analysis was the neighborhood of Cachoerinha, where there are quite old buildings and not much wooded and following the same criteria, opposite climatic conditions, intense rains and intense sun. With the comparative, we can verify attenuation that occurred in the rainy season and improve the coverage in those periods that frequently occur in the city.
Controle de um sistema de combate a incêndio através de comunicação GSM e plataforma arduino
(2019-12-04) Galvão, Paulo Rogério Vieira; Souza, José Geraldo de Pontes e; Souza, José Geraldo de Pontes e; Silva, Nivaldo Rodrigues; Ribeiro, Ewerton Andrey Godinho
This work aims to develop an automatic remote monitoring device through a fire fighting system, through the interaction between GSM communication and Arduino Platform, enabling the receipt of text messages on a user's mobile phone if they have a fire principle. The system also allows the user to send command to receive information from sensors and to restore the system after controlled fire.Thus, through the study it was possible to present a functional and dynamic solution that enabled the user communication with the mechanism through the telecommunications system.
Rádio definido por software: Manual prático da plataforma USRP no LabVIEW com o equipamento estudantil NI USRP 2920.
(2019-12-12) Andrade Júnior, Paulo Teles; Souza, José Geraldo de Pontes e; Souza, José Geraldo de Pontes e; Silva, Nivaldo Rodrigues; Ribeiro, Ewerton Andrey Godinho
This paper aims to describe the main concepts about Software Defined Radios, in order to gain a better understanding of this technology. And, for that were done research, analysis, what makes up an SDR (showing each element), and what constitutes LabVIEW. Also described is one of the applicability of SDR which is to make changes to the entire structure of the equipment without the need to modify the hardware, but only the graphical interface (in LabVIEW) or changing the program lines, SDR is a project that offers low implementation cost, reduced hardware, flexible system and etc. Its limitations are the processors, the Digital-Analog and Digital-Analog converters, the modules that make up your hardware (WIFI, frequency cap, etc.). Introducing the step-by-step creation of handling the NI USRP-2920 equipment as well as an FM Radio receiving circuit (demonstrating the application combining LabVIEW and the USRP platform).
Tratamento de ruído ingressante em rede HFC
(2020-02-11) Silva, Marllon da Silva e; Souza, José Geraldo de Pontes e; Souza, José Geraldo de Pontes e; Silva, Nivaldo Rodrigues; Ribeiro, Ewerton Andrey Godinho
Technological advances in the cable TV network, allow the achievement of higher transfer rates, however with a limited spectrum, it is necessary to optimize the network, increasing its density, consequently reducing the space for noise. Understand the origin of this phenomenon is of paramount significance, in order to give the most appropriate approach, and also ascertain the process necessary to maintain a quality standard in services. Therefore, the issue will be discussed, what comes to be an HFC network (Hybrid Fiber Coax), its origin and initial disposition and after the emerging of the hybrid network, emphasizing the part of the coaxial network, because it is the one that most wear out from the noise effects. Then, the main types of noise will be mentioned, along with the graph and its characteristics. For this purpose, a field research was fulfilled to understand how the process of treating noise in the network is applied, with some practices and results observed being presented at the end.