He received Bachelor of Surgery and Master of Surgery degrees in electrical engineering from Seoul National University, Seoul, of Korea, in 1978 and 1980, respectively. He received a Doctor of Philosophy degree in computer, information, and control engineering from the University of Michigan at Ann Arbor, in 1984 under the supervision of Theodore Birdsall.
His research focuses on wireless communications, Code Division Multiple Access, and Multiple-input and multiple-output. From 1985 to 1989, he was with the University of Wisconsin, Milwaukee, as an assistant professor in Electrical Engineering and Computer Science Department. From 1989 to 1993, he was with the Lockheed Engineering and Sciences Company, Houston, Texas, as a principal engineer, working for National Aeronautics and Space Administration Space Shuttle and Space Station satellite communication systems Since 1993, he has been with the Electrical and Computer Engineering Department of Wichita State University where he is now a full professor
In addition, he held several visiting and consulting positions at communication system industries, was a Visiting Associate Professor at Texas Agricultural and Mechanical University, College Station in 1997, and a Visiting Professor at Korea Advanced Institute of Science and Technology, Daejeon, of Korea in 2005.
