1. Department of Communications Engineering, Brandenburgische Technische Universität Cottbus – Senftenberg, Cottbus, Germany
2. Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Project Group “Cognitive Material Diagnostics”, Brandenburgische Technische Universität Cottbus – Senftenberg, Cottbus, Germany
3. Department of Mathematics and Informatics, University of Palermo, Palermo, Italy