Affiliation: | 1. Department of Teleinformatics Engineering, Av. Mister Hull, S/N, Campus of Pici, Center of Technology, Federal University of Ceará, CEP 60455-970, Fortaleza, Ceará, Brazil 2. Department of Electrical Engineering, Av. Ministro Petr?nio Portela, S/N - Campus of Ininga, Center of Technology, Federal University of Piauí, CEP 64049-550, Teresina, Piauí, Brazil
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