1. a Department of Electronic and Electrical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam-Gu, Pohang, Gyeongbuk, 790-784, Korea
2. b Department of Electronic and Electrical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam-Gu, Pohang, Gyeongbuk, 790-784, Korea
3. c Naval Combat System Division, Agency for Defence Development (ADD), P.O. Box 18, Jinhae, Gyeongnam, 645-600, Korea
4. d Naval Operation Command, Republic of Korea Navy, Doman-Dong, Jinhae, Gyeongnam, 645-754, Korea
5. e Department of Electronic and Electrical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam-Gu, Pohang, Gyeongbuk, 790-784, Korea