Speciality And Jamming Study On Communication Links Of Tracking And Data Relay Satellite System

The shift from Ground-based Network to Space-based Network is hot recently. Space-based network consists of two geostationary satellites and one land terminal, is a space measure and control net, which covers several on-track aircrafts (satellite, spaceship, space station, etc) continuously, runs in 300Mbps for the return link, and is precise in trajectory determination.Tracking and Data Relay Satellite System measures, controls and relays the mediate/low orbit aircrafts (user satellites) by geostationary satellites and land terminals. It weighs heavily in the satellite communication system because it increases the mediate/low orbit aircraft's converge, decrease the amount of ground telemetry stations. Because the Tracking and Data Relay Satellite system is relatively new to china, being in the pre-research stage, it is necessary to study communication links of the system before establish it.The content is listed below:(1) Analyzed our national Tracking and Data Relay Satellite System's scheme after introducing the system design and establishing a reasonable plan.(2) Scrutinized the channel properties, set a link signal model, and analysed space to ground and space to space links respectively.(3) Figured out and simulated the space natural interferences in the TDRSS links.(4) Comprehensively studied the man-made jamming in the TDRSS link. Firstly, briefly analysed the possibility of jamming in the forward and return links by the interferential satellite; then briefly introduced the common jamming techniques, mask, spot, deception, etc, and theoretically analyzed these jamming ways; put these jamming techniques specialized in the TDRSS forward and return links, and make some simulations about the BER of the links under different jamming. The simulation demonstrated that the spot jamming is most effective.By analysing the speciality and jamming on the communication links of Tracking and Data Relay Satellite System, we have gained the conclusion being rich in significance for the further study on TDRSS.