Beijing Research Institute of Telemetry Beijing 100076 ChinaTsinghua Space Center Tsinghua University Beijing 100084 ChinaKey Laboratory of EDA Research Institute of Tsinghua University in Shenzhen Shenzhen 518057 China;
Department of Electrical Engineering Tsinghua University Beijing 100084 China;
Beijing Research Institute of Telemetry Beijing 100076 China;
Beijing Research Institute of Telemetry Beijing 100076 China;
Beijing Research Institute of Telemetry Beijing 100076 China;
Department of Electrical Engineering Tsinghua University Beijing 100084 China;
space-air-ground network; UAV-aided communication systems; timing synchronization; OFDMranging;