1. Communication and Signal Processing Laboratory (CSPL), Department of Control and Instrumentation Engineering; Chungju National University; 72 Daehangno, Chungju-si; Chungbuk; 380-702; Korea
2. Media Laboratory, Department of Electronics and Computer Engineering; Hanseo University; 360 Daegok-ri, Haemi-myun, Seosan-si; Chungnam; 356-706; Korea