1. 5GIC & 6GIC, Institute for Communication Systems (ICS), University of Surrey, Guildford, U.K
2. School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou, China
3. State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, China
4. Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China