1. College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; "Telecommunication and Network" National Engineering Research Center, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2. Shanghai Aerospace Electronic Technology Institute, Shanghai 201109, China