1. Fatih University, Department of Electronics Engineering 34900, Istanbul, Turkey. E-mail: mkoksal@fatih.edu.tr
2. Inonu University, Department of Electrical and Electronics Eng. 44069, Malatya, Turkey. E-mail: tabbasov@inonu.edu.tr
3. Nigde University, Department of Electrical and Electronics Eng. 51100, Nigde, Turkey. E-mail: s_herdem@hotmail.com