1. School of Software, Dalian University of Technology,Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province,Dalian,China
2. Institute of Information Science Technology, Dalian Maritime University,Department of Communication Engineering,Dalian,China
3. School of Information Science and Engineering, Southeast University,State Key Laboratory of Millimeter Waves,Nanjing,China
4. School of Information and Communication Engineering, Hainan University,State Key Laboratory of Marine Resource Utilization in South China Sea,Haikou,China