Allan de M. Martins

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Automatic modulation classification (AMC) techniques have applications in a variety of wireless communication scenarios, such as adaptive systems, cognitive radio, and surveillance systems. However, a common requirement to most of the AMC techniques proposed in the literature is the use of signal preprocessing modules, which can increase the computational(More)
This paper shows a comparison between two clustering algorithms that use divergence measures to aid the clustering task. Both algorithms take a N-dimensional data set and uses competitive neural networks to separate them into isotropic clusters. Those clusters are then grouped based on a divergence measure. In this paper we compare that procedure using two(More)
Recent studies have demonstrated that correntropy is an efficient tool for analyzing higher order statistical moments in non-Gaussian noise environments. Although correntropy has been used with complex data, no theoretical study was pursued to elucidate its properties, nor how to best use it for optimization. By using a probabilistic interpretation, this(More)
The System identification explores ways to obtain mathematical models of an unknown system. However, as a result from the intrinsic random nature of system or from the environment noise, it is very hard to find a perfect mathematical representation of a real system. This paper aims to evaluate the Maximum Correntropy Criterion (MCC) performance using the(More)
Recent studies have demonstrated that correntropy is an efficient tool for analyzing higher-order statistical moments in nonGaussian noise environments. Although it has been used with complex data, some adaptations were then necessary without deriving a generic form so that similarities between complex random variables can be aggregated. This paper presents(More)
Resumo A visão possui muitos sensores responsáveis pela captação de informações que são enviadas ao cérebro. O olhar reflete a sua atenção, intenção e interesse. Sendo assim, a detecção da direção do olhar é uma alternativa promissora para a comunicação com a máquina. A aplicação de técnicas para detecção da direção do olhar tem a possibilidade de melhorar(More)
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