1. Faculty of Engineering Rajamangala University of Technology Lanna Chiang Mai Thailand
2. Research Center of Innovation Digital and Electromagnetic Technology Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut's University of Technology North Bangkok Bangkok Thailand
3. Research Center of Innovation Digital and Electromagnetic Technology Department of Electrical and Computer Engineering, Faculty of Engineering King Mongkut's University of Technology North Bangkok Bangkok Thailand
4. Graduate Institute of Communication Engineering, Department of Electrical Engineering National Taiwan University Taipei Taiwan