Author(s):
1. Ivan Zlatković, Univeristy of Niš, Faculty of Electronic Engineering, Serbia
2. Vojislav V. Mitić, Univeristy of Niš, Faculty of Electronic Engineering, Serbia
3. Ljubiša Kocić, Univeristy of Niš, Faculty of Electronic Engineering, Serbia
4. Vesna Paunović, Univeristy of Niš, Faculty of Electronic Engineering, Serbia