XLI Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This work presents the accuracy evaluation and validation of the Generalized Lee Method (GLM) for different narrow-band wireless channels. The method uses moving average and defines parameters to separate the small and large-scale fadings of a channel. To measure its accuracy and validate it, a channel simulator with known fading was implemented,...

This work presents a numerical model for analyzing the two-dimensional radiation of current lines in a mixed region with four different media. The media are located in each quadrant of the analysis plane, and the magnetic and electric current lines are in the second quadrant. The problem was initially modeled by Maxwell's equations and Green's function...

Neste artigo, amplia-se o escopo usual do processamento de sinais sobre grafos, considerando sinais quaterniônicos sobre grafos com pesos de arestas também quaterniônicos. A abordagem proposta parte da definição de uma transformada quaterniônica de Fourier em grafos (QGFT), cujo cálculo envolve o encadeamento de vários resultados da álgebra dos...

This work presents the development of a compact ultra low power data transmission device, using a commercial sensor with 4 to 20mA output to monitor water level of the Sapucaí river. The equipment was connected to a Chirpstack LoRaWAN network and integrated with Node-RED tools, storing the information in InfluxDB and displaying it on Grafana. The study...

This work investigates the performance of cell-free multiple input multiple output systems serving ground user equipments (GUEs) and uncrewed aerial vehicles (UAVs) when varying the tilt angle of the access point antennas. The antenna tilt affects the radiation power pattern, such that tilting the antennas upwards is favourable for the UAVs, while...

In this paper, it is proved that the eigenvectors (or eigenstates) common to the Kraus operators representing the quantum channel are fixed points of it. From this and assuming that the Kraus operators that represent the quantum channel have at least two eigenstates in common, it is proved that the zero-error capacity of the quantum channel is positive....

This paper introduces a new dataset designed to address the limitations in high-quality, diverse and representative datasets for training text-to-speech (TTS) models, specifically for female voices in Brazilian Portuguese. The dataset features a female voice recorded in a professional and controlled environment with neutral emotion and comprises more...

This study investigates the information security in a discrete multitone-based power line communication (PLC) system when a wireless communication eavesdropper tries to obtain private information and the PLC transmitter combats it with an artificial noise scheme designed to degrade the eavesdropper's signal-to-noise ratio only. The numerical results...

Neste artigo é proposto um algoritmo de amostragem voltado a redes de difusão adaptativas multitarefas clusterizadas. O algoritmo proposto busca manter os nós amostrados quando o erro quadrático em seus clusters é elevado e deixa de amostrá-los, caso contrário. As simulações mostram que a solução proposta alcança um custo computacional semelhante ao de...

The New Radio (NR) 5G enabled a series of new applications based on its lower latency, higher reliability and transmission rate, among these, the improvement in communication between vehicles. The Vehicle-to-Everything (V2X) communications have extremely dynamic scenarios, in order to ensure expected performance, a careful system configuration is...