XXXIX Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This work describes a secure residential IoT (Internet of Things) application development using the transport layer security (TLS) protocol. The project integrates a mobile application and hardware modules, which allows for the control of air conditioning, internal lighting, and curtains. The Android mobile application controls the environment in which...

Using a shared vegetable garden scenario, this article presents the application of the Internet of Things in a case of Shared Economy, using the IOTA cryptocurrency and its distributed records protocol, and the fuzzy logic, in order to have control over the functionalities of the vegetable garden, their payments, the distribution of products, and the...

Teaching has employed more and more digital and online tools, especially nowadays with the pandemic. IoT has been notoriously troublesome for teaching due to its multi-disciplinary nature, involving fields such as computing, electrical engineering, business, humanities, and others. Several methodologies have been developed for IoT teaching IoT and for...

Visible light communications (VLC) transmit data through light emitting diodes. In this work, a VLC communication system is implemented with a commercial lamp composed of 7 white LEDs. The system includes the design-assembly of the electronic circuits of the transmission and reception front-ends. The different simulations carried out for an indoor...

Physical layer security (PLS) is an alternative to traditional information security mechanisms. Physical layer secret key generation (PSKG) is a PLS technique that uses channel randomness to generate keys for encryption algorithms. Although several works investigated PSKG in slow fading channels, fast fading scenarios remain a challenge. We propose...

In this paper, we propose a solution to the optimization problem of a resource scheduler for 5G mobile communication networks. This scheduler allocates bandwidth to User Equipments (UEs) within the coverage area of Small Cells, considering the Network Slicing (NS) paradigm. The simulation is proposed for UEs using Ultra-Reliable and Low-Latency...

O filtro de Wiener multicanal (MWF) tem sido amplamente utilizado para redução de ruído em aparelhos auditivos biauriculares. Neste trabalho é apresentada uma proposta de parâmetro de ponderação para funções custo aumentadas, baseadas no método MWF com preservação da percepção espacial. De forma a demonstrar seu desempenho, é realizada uma análise...

This study proposes a performance comparison between the orthogonal chirp division multiplexing (OCDM) and Hermitian symmetric orthogonal frequency division multiplexing (HS-OFDM) schemes in terms of data rate and bit error probability in the context of narrowband power line communication (PLC) systems. To analyze data rate of various power allocation...

Non-orthogonal multiple access (NOMA) can improve the performance of cell-free massive MIMO systems by reducing the effects of pilot contamination. To assess NOMA performance most of the literature compares it with orthogonal multiple access (OMA). However, these works comparisons are unfair. From the authors' perspective, a fair comparison should...

Recently, speaker verification techniques have been conceived through deep neural networks using d-vectors. In this work, we made experiments to compare different models in situations where we have data for training that were not obtained from the same source as the test data, representing a real problem, where it is necessary to choose a model, without...