[1] Natl Chung Cheng Univ, Dept Commun Engn, Chiayi 621301, Taiwan
[2] Natl Chung Cheng Univ, Adv Inst Mfg High Tech Innovat AIM HI, Chiayi 621301, Taiwan
[3] Natl Chung Cheng Univ, Dept Elect Engn, Chiayi 621301, Taiwan
[4] Natl Chung Cheng Univ, Dept Comp Sci & Informat Engn, Chiayi 62102, Taiwan