1. Computer Based Systems RT-RK, Str. 2v Dunavska, Belgrade 11158, Serbia
2. Faculty of Technical Sciences Cacak, University of Kragujevac, Svetog Save 65, Čačak 32000, Serbia
3. Beijing Jiaotong University, Institute of Information Science, Haidian District, Shangyuancun 3, Beijing 100044, P. R. China
4. Department of Electronics and Communication Engineering, Dr BR Ambedkar National Institute of Technology, Jalandhar 144027, Punjab, India
5. Faculty of Technical Sciences Cacak, University of Kragujevac, Svetog Save 65, Cacak 32000, Serbia