1. Yuan Ze University, Department of Electrical Engineering, 135 Yuan-Tung Road, Chung-Li, Taoyuan 320, Taiwan
2. Yuan Ze University, Department of Electrical Engineering, 135 Yuan-Tung Road, Chung-Li, Taoyuan 320, TaiwanbNational Chung-Shan Institute of Science and Technology, System Development Center, No. 481, 6th Neighborhood, Section Jia'an, Zhongzheng Road, Lon