Affiliation: | 1. Faculty of Engineering and Research Center for Communication and Information Technology (ReCCIT) , King Mongkut's Institute of Technology Ladkrabang , Ladkrabang, Bangkok 10520, Thailand ktworapo@kmitl.ac.th;3. Faculty of Engineering and Research Center for Communication and Information Technology (ReCCIT) , King Mongkut's Institute of Technology Ladkrabang , Ladkrabang, Bangkok 10520, Thailand |