1. Institute of Industrial Electronics and Electrical Engineering, Faculty of Electrical and Environmental Engineering, Riga Technical University, Azenes 12/1, LV1048 Riga, Latvia
2. Information and Computer Systems Department, Chernihiv Polytechnic National University, Shevchenko, 95, 14035 Chernihiv, Ukraine
3. Department of Electrical Engineering, Faculty of Engineering Technology, KU Leuven, Bruges Campus Spoorwegstraat 12, 8200 Bruges, Belgium
4. Department of Computer Sciences, Kaunas University of Technology, Studentu St. 50-211 kab., LT-51368 Kaunas, Lithuania