1. School of Electrical Engineering, International University, Ho Chi Minh City, Vietnam
2. Department of Telecommunications Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam
3. Technology Innovation Institute, Masdar City, Abu Dhabi, United Arab Emirates
4. Department of Electrical and Computer Engineering, Iowa State University, Ames, IA, USA
5. Department of Electrical, Electronic and Computer Engineering, University of Ulsan, Ulsan, South Korea