1. Ph.D. Student, Dept. of Electrical and Electronic Engineering, Shiraz Univ. of Technology, Shiraz 71557-13876, Iran (corresponding author).
2. Associate Professor, Dept. of Electrical and Electronic Engineering, Shiraz Univ. of Technology, Shiraz 71557-13876, Iran.
3. Professor, Dept. of Electrical and Electronic Engineering, Shiraz Univ. of Technology, Shiraz 71557-13876, Iran.