1. Department of Electronics and Multimedia Communications, Faculty of Electrical Engineering and Informatics (FEI), Technical University of Košice (TUKE), Letná 9, 041 20 Košice, Slovak Republic
2. Department of Theoretical Electrotechnics and Electrical Measurement, FEI, TUKE, Letná 9, 040 01 Košice, Slovak Republic
3. Institute of Computer Technology, TUKE, B. Němcovej 3, 042 00 Košice, Slovak Republic
4. Department of Electrical Engineering, Slovak Agricultural University, Faculty of Agricultural Engineering in Nitra, Slovak Republic