Satellite-ground synchronization method for on-satellite processing beam-hopping satellite communication system

Abstract

The invention discloses a satellite-ground synchronization method for an on-satellite processing beam-hopping satellite communication system, and belongs to the technical field of satellite communication. By periodically inserting the beam hopping plan corresponding to the beam position into the downlink frame, the ground terminal can be effectively assisted to realize the fast access of the uplink in the beam hopping environment. In addition, in combination with the working principle of the phased-array antenna, the satellite-borne time transmission method oriented to phased-array antenna beam hopping application is provided, and the time reference consistency among multiple phased-array antennas and between each wave position receiving beam and each wave position transmitting beam is effectively ensured. The synchronous control time sequence of the phased-array antenna is provided, the beam switching serial data and the wave speed switching control pulse signal are separately transmitted, the beam switching serial data are sent in advance before the beam switch control pulse is sent, the protection time in the beam switching process is shortened, and the transmission efficiency of the beam hopping application is effectively improved.

Description

technical field [0001] The invention relates to a satellite-ground synchronization method for on-board processing beam-hopping satellite communication systems, belonging to the technical field of satellite communication. Background technique [0002] Beam-hopping satellite communication is a communication technology that can effectively improve the utilization efficiency of satellite system resources. Different from the traditional fixed-beam communication method, beam-hopping communication uses time division to adjust the beam direction dynamically at high speed according to business requirements within the satellite coverage area. Beam hopping can reasonably allocate beam resources according to different business demands in different areas of the satellite. When the traffic volume in a certain area is large, beam resources in multiple time slots can be allocated. When the traffic volume is small, the beam resources in this area can be reduced accordingly. Gap, thereby impr...

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Problems solved by technology

[0006] In the beam-hopping satellite communication system, since the dynamic hopping of the beam increases the synchronization requirements of the spatial dimension, the complexity of the system synchronization is increased. The traditional fixed-beam time synchronization method cannot be directly used in the beam-hopping satellite communication system. This patent provides an efficient satellite-to-ground synchronization method for on-board processing of beam-hopping satellite communication systems

[0007] Chinese databases, English databases and patent databases are searched by keywords such as "beam hopping", "beam agility", "beam hopping", "beam hopping", "hopping beam", and "TDMA". There are relatively few beam data, and there are fewer research contents on satellite-ground synchronization in the beam-hopping system oriented to on-board processing. The beam-hopping synchronization in the ground mobile communication system includes pilot-assisted methods, dedicated synchronization channel methods, etc., but they all combine Its special system structure and application background are not suitable for satellite system applications

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