XL Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

High transmission rates are primary requirements for services and applications requiring improved mobile broadband (EMBB - Enhanced Mobile Broadband) and offered by fifth-generation (5G) networks. In this context, analyzing service quality metrics (QoS - Quality of Service), such as Throughput, is essential to understand the user experience connected to...

V2V (Vehicle to Vehicle), V2I (Vehicle to Infrastructure) and ITS (Intelligent Transportation System) is the approach to increasing the safety of the transport system. VANET (Vehicular Ad-Hoc Network) is a version of MANET (Mobile Ad-Hoc Network) in which Vehicles act as active nodes of the network. VANET is a highly mobile system. In this paper, a...

Neste artigo, objetiva-se analisar o desempenho do algoritmo de roteamento por série de potências, em termos de probabilidade de bloqueio de chamadas e número de iterações, em um cenário de rede ótica elástica, frente a duas variações do algoritmo de otimização bioinspirada utilizado em sua proposta original. Essa técnica se baseia em conceitos de...

This paper aims to model the broadband mobile radio channel at indoor environment applying hidden Markov models to the main temporal dispersion parameters of the channel. When proving the feasibility of such modeling, the employed technique is shown to be a powerful option for the statistical characterization of the radio channel.

Os autocodificadores variacionais (VAEs) são redes neurais amplamente utilizadas em tarefas de aprendizado não supervisionado. Deduz-se neste trabalho uma extensão do algoritmo de equalização cega baseado em VAEs de Caciularu et al. para canais SIMO (Single-Input Multiple-Output). Propõe-se, ainda, uma formulação alternativa deste método com complexidade...

An apparently definitive conclusion that can be drawn from the literature is that the calculation of the signal-to-noise ratio wall (SNRw) of detectors for spectrum sensing is not trivial. Conventionally, to make this calculation one has to find the expressions of the probabilities of detection and false alarm, and of the required number of samples to...

The fast-moving evolution of new technologies is driving the future mobile networks to a challenging pursuit for high throughput and reliability. Emerging services will need precise indicators to address contrasting requisites and link adaptation is a cardinal element. The received signal measurements must provide complete information to perform...

This work exploits vulnerabilities in an outdated version of Pandora FMS software through penetration testing (pentest) to demonstrate the relevance of updating systems, software, and applications to avoid cyber attacks. The practical approach is based on a pentest black box in an environment with an outdated version of the Pandora FMS. The SQL injection...

Impulsive noise can be extremely harmful to the operation of electronic systems in general, and of communication systems in particular, as is the case of spectrum sensors in cognitive radio networks. The article evaluates the performance of spectrum sensing when impaired by impulsive noise. Two receivers are compared: a conventional one, which does not...

This work compares 8 machine learning algorithms in terms of their average accuracy in classifying 30 plant species. The classification system has a proprietary implementation and uses leaf photos as input to the classification system. The results show that the Linear Discriminant Analysis algorithm proved to be the most appropriate for this specific...