1. Rajamangala University of Technology,Faculty of Engineering and Technology,Department of Telecommunication Engineering,Nai-muang,muang,Nakorn Ratchasima
2. Rajamangala University of Technology Lanna,Faculty of Engineering,Department of Industrial Education and Technology,Muang,Chiang, Mai,50300
3. Rajamangala University of Technology Krungthep,Faculty of Engineering,Department of Electrical and Telecommunication Engineering,Thungmahamek, Sathorn,Bangkok,Thailand,10120