[1] RT RK Inst Comp Based Syst, Novi Sad, Serbia
[2] Univ Belgrade, Sch Elect Engn, Belgrade 11001, Serbia
[3] Inst Mihajlo Pupin, Volgina 15, Belgrade 11060, Serbia
[4] Univ Belgrade, Sch Elect Engn, Inst Mihajlo Pupin, Volgina 15, Belgrade 11060, Serbia