Satellite-ground synchronization method for on-satellite processing beam-hopping satellite communication system
A satellite communication system and beam hopping technology, applied in the field of satellite communication, can solve the problems that the fixed beam time synchronization method cannot be used directly, increase the space dimension synchronization requirement, and increase the system synchronization complexity, etc., so as to achieve time benchmark consistency, improve Application flexibility, effects that simplify processing complexity
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[0048] The present invention combines the characteristics of a typical on-board processing transponder beam-hopping communication system, and periodically inserts the beam-hopping plan information corresponding to the current wave position in the downlink frame through the on-board modem, effectively assisting the ground terminal to realize uplink under the beam-hopping environment Fast synchronization of the link; the on-board modem transmits the beam switching serial data and the beam speed switching control pulse signal separately, and sends the beam switching serial data in advance before sending the beam switching control pulse, which reduces the protection time during the beam switching process, The transmission efficiency of beam-hopping applications is effectively improved; at the same time, a space-borne time transfer method for beam-hopping applications of phased array antennas is given in combination with the working principle of phased array antennas, which effective...
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