1. School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK, USA
2. Department of Computer Engineering, Korea National University of Transportation, Chungju-si, Republic of Korea
3. U.S. Naval Research Laboratory, Washington, DC, USA
4. Defense Threat Reduction Agency, Fort Belvoir, VA, USA
5. School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
6. Department of Electronic Engineering, Hanyang University, Seoul, Republic of Korea