XXXV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

In this paper, we present the performance analysis of four statistical detection tests for the Auditory Steady-State Response (ASSR): F test, phase coherence (PC), magnitude-squared coherence (MSC) and T 2 circular (T2). The detector’s accuracy levels were analyzed by the receiver operating characteristic method. The ASSR was modeled by a sinusoidal...

In the digital signal processing (DSP) area, one of the most important tasks is digital filter design. Currently, this procedure is performed with the aid of computational tools, which generally assume filter coefficients represented with floating-point arithmetic. Nonetheless, during the implementation phase, which is often done in digital signal...

É bem conhecido que o movimento humano possui padrões estatísticos comuns com o modelo de mobilidade LevyWalk. Em simulações experimentais de modelos de mobilidade para estudos de redes sem fio, costuma-se descartar parte do tempo inicial da simulação para remover os efeitos do transiente. Este artigo mostra que o movimento humano possui características...

Antenas inteligentes são fundamentais nos sistemas móveis de última geração, pois conseguem mitigar interferências e rastrear usuários pela estimação das direções das frentes de onda incidentes. O estimador MODEX é muito difundido mas tem seu desempenho degradado em baixas relações sinal-ruído, devido a empregar a função objetivo de máxima...

VANETs (Vehicular Ad Hoc Networks) aim to provide safety and comfort services for drivers on roads and highways. Among these services, there are computation-intensive tasks in real-time applications that need to be executed as quickly as possible. Using the Vehicular Cloud paradigm (or VANET- Cloud), where vehicles offer their computing resources as...

Temporally structured sources may arise in blind equalization as the result of coding schemes. In this context, a promising approach involves the use of correntropy, which is capable of exploring both the statistical information and the temporal structure of the signals. In this work, we perform a detailed analysis of the correntropy-based criterion for...

This paper introduces the use of a directed infor- mation estimator for discrete-valued processes to continuous- valued processes by previously discretizing the continuous-valued processes according to three different and generally applicable methods. The directed information estimator uses context tree weighting algorithm (CTW). The three...

This work investigates the use of Non-Stationary Hidden Markov and Hidden Bivariate Markov Models through simulations and real-time application to predict RF channel occupancy in cognitive radio systems. Real data collected in public safety frequency band during the Rio 2016 Olympic and Paralympic Games were used to test a simple cognitive spectrum...

Este trabalho apresenta o projeto de uma estação terrestre capaz de rastrear, demodular e decodificar sinais de imagens de satélite no formato Automatic Picture Transmission (APT) e Low-Rate Picture Transmission (LRPT). A solução proposta apresenta a construção de uma antena QFH, o uso de rádio definido por software (RDS) RTL-SDR e um...

A top concern in Software Defined Networking (SDN) is the management of network flows because of resource limitation in SDN devices (such as TCAM size) and the signaling overhead between the control and data plane elements. This work performs an evaluation of reactive, proactive and active strategies for creating flows inside an SDN network. The...