Network technologies of space TT&C communication system Key technologies of visible light communication for 6G 并列题名：Key technologies of visible light communication for 6G Tenna technologies and applications in mobile communication system Massive MIMO technologies in 5G communication systems 并列题名：Tenna technologies and applications in mobile communication system Simulation design of modern tactic communication system New multiple access technologies for 5G communication systems Physical layer key technologies of rail traffic broadband mobile communication systems Security technology of wireless communication networks