Utilização de circuitos caóticos aplicados em meios de comunicação para maior confidencialidade entre transmissor-receptor: estudo teórico e prático na área de telecomunicações

• Autor(a) principal: Nogueira, Gabriel Gomes
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/217592
• topic: Arduino (Controlador programável); Circuitos elétricos; Circuitos elétricos não-lineares; Circuitos eletrônicos; Codificação; Comportamento caótico nos sistemas; Eletrônica; Telecomunicações

Through the study of nonlinear circuits, from its theoretical conception, simulation in computational environment and practical development, this project has as main objective to add greater confidentiality in a channel of communication between a transmitter and a receiver using a signal considered chaotic as basis for information encoding. For this, a theoretical research was initially developed to identify the state of the art regarding physical layer encryption, synchronization and practical applications using chaotic circuits. Chua Circuit was chosen and simulated in a computational environment because it can present a signal with behavior not predictable and highly sensitive to the initial conditions, in different situations using different electronic components. Then, the simulations were validated with laboratory prototyping using protoboards and discrete components such as capacitors, operational amplifiers, potentiometers and resistors. The results were then compared with those observed in simulation, and it was verified the possibility of use and its limitations in the current telecommunications scenario, considering transmission in digital media. Satisfactory results were obtained, sending a digital coded message through a microcontroller, which will be covered throughout this work.