1. Department of Electronic Engineering, Pukyong National University, Busan, 48513, South Korea
2. Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA 90007, USA
3. School of Electrical Engineering, Korea University, Seoul 02841, South Korea
4. Hanwha Systems, South Korea
5. Korea Research Institue for Defense Technology Planning and Advancement (KRIT), South Korea