1. Rajamangala University of Technology Krungthep,Faculty of Engineering,Department of Electrical and Telecommunication Engineering,Bangkok,Thailand,10120
2. Rajamangala University of Technology Thanyaburi,Faculty of Engineering,Department of of Electronics and Telecommunication Engineering,Pathum Thani,Thailand,12110
3. Rajamangala University of Technology Lanna,Faculty of Engineering,Department of Industrial Education and Technology,Chiang Mai,Thailand,50300
4. Rajamangala University of Technology Isan,Department of Telecommunication Engineering,Nakorn Ratchasima