1. Department of Informatics and Telecommunications, National and Kapodistrian University of Athens, Athens, Greece
2. College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China
3. Engineering Product Development (EPD) Pillar, Singapore University of Technology and Design, Tampines, Singapore
4. Centre for Wireless Communications, University of Oulu, Oulu, Finland
5. Technology Innovation Institute, Abu Dhabi, United Arab Emirates