1. School of Electronic and Electrical Engineering, Kyungpook National University, Daegu, South Korea
2. System Development Center, Hanwha Solution, Daegu, South Korea
3. Department of Electrical and Electronics Engineering, Konkuk University, Seoul, South Korea
4. Division of Electronics and Electrical Engineering, Dongguk University, Seoul, South Korea
5. School of Electronics Engineering and the School of Electronic and Electrical Engineering, Kyungpook National University, Daegu, South Korea