1. Faculty of Electrical and Computer Engineering, ESPOL Polytechnic University,Escuela Superior Politecnica del Litoral,Campus Gustavo Galindo Km.30.5 Via Perimetral, P.O.Box 09-01-5863, Guayaquil, Ecuador and Computer and Systems Informatics Department, Universitat Politècnica de València,Camino de Vera s/n, Valencia 46022, Spain
2. Faculty of Electrical and Computer Engineering, ESPOL Polytechnic University,Escuela Superior Politecnica del Litoral,Campus Gustavo Galindo Km.30.5 Via Perimetral, P.O.Box 09-01-5863 Guayaquil, Ecuador
3. Institute of Information and Communication Technologies, ITACA, Universitat Politècnica de València,Camino de Vera s/n,Valencia 46022, Spain