1. Department of Electrical Engineering, National Cheng-Kung University, Tainan, Taiwan, Republic of China
2. Department of Electronic Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung City, Taiwan, Republic of China
3. Kaohsiung Medical University, Kaohsiung City, Taiwan, Republic of China
4. Department of Computer Science and Information Engineering, National Cheng-Kung University, Tainan, Taiwan, Republic of China
5. Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
6. Electrical Engineering School, Universidad del Zulia, Maracaibo, Venezuela