XXXVIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

System virtualization ensures greater flexibility to improve the resource management of telecommunication and network applications when compared with physical solutions. The centralized radio access network (C-RAN) architecture enables cloud processing, making functions virtualization possible in a mobile network deployment. C-RAN components...

Network Slicing is considered a key mechanism to serve all network clients in a flexible and cost-efficient manner. This concept defines a real network into virtual and independent logical networks allocated according to services and requirements. The software-defined RAN (Radio Access Network) platforms allow the control and administration of RAN, thus...

This article presents an analysis of Polar and LDPC codes for the URLLC usage scenario of the radio access interface 5G New Radio (NR). The objective is to analyze the codes already defined for the eMBB scenario, however, considering the ultra-reliability requirement necessary for the URLLC scenario.

Em física de partículas um atributo importante para caracterização dos eventos de interesse é a energia medida nos calorímetros. Filtros ótimos podem ser utilizados na estimação de energia mesmo na ocorrência de ruído e sobreposição de sinais. Para isso, é necessário conhecer a linha de base dos pulsos adquiridos no calorímetro. A linha de base pode...

In this paper, we present a discrete-time linear recursive filter representation for a piecewise-linear map that generates chaotic signals. It can be used to easily deduce analytical formulas for power spectral density of chaotic signals, providing useful results for chaos-based communication systems and signal processing. Numerical simulations are used...

Este trabalho apresenta um sistema de geração e treinamento de uma árvore de decisão para classificação de sinais de vibração em pontes. Para o controle do sistema foi utilizado o microcontrolador ESP32-WROOM-32, e o módulo acelerômetro MPU5060 para medições das vibrações, ambos responsáveis pela geração do dataset usado na etapa de treinamento. A...

This paper presents an approach to target-classification optimization based on acoustic signals collected using a hydrophone, an underwater electroacoustic transducer. This study has applications to sonars or any sound-classification application. We divide the problem into three parts, namely feature extraction, feature selection, and target...

This article presents the development and analysis of new geometries of Dual-Band MIMO antennas (Multiple Input Multiple Output), compact, resonating at 2.3 GHz and 3.5 GHz for application in the new technology of fifth generation wireless communication (5G). The High Frequency Structure Simulator (HFSS) software was used in the simulation to obtain the...

A full-duplex incremental cooperative non-orthogonal multiple access (FD-ICN) scheme is proposed for a two user downlink network. Based on a pilot signal from the far user, the base station decides between transmitting in direct transmission mode or using cooperation via the near user. We evaluate the proposed scheme in terms of the pair outage...

In this paper, the physical layer security for a two-user downlink NOMA cluster, between a near trusted user and a far untrusted user, subject to Nakagami- m fading is investigated. It is considered an scenario with a multiple antenna base station, in which the antenna with best channel for the near user is selected. The pair outage probability and...