Timing Synchronization and Ranging in Networked UAV Aided OFDM Systems

The space-air-ground network architecture integrates satellite systems, aerial networks, and terrestrial networks, where the unmanned aerial vehicle(UAV) communication in the air segment has attracted particular interest and demonstrated tremendous potential in both military and civilian applications. Orthogonal frequency division multiplexing(OFDM)can be an effective solution to provide high rate and reliable transmission in UAV communication systems because of its high spectral efficiency and