Method of adjusting satellite relay data transmission communication rate in self-adaptive manner

Abstract

The invention provides a method of adjusting a satellite relay data transmission communication rate in a self-adaptive manner, and aims to provide a transmission method which is low in time delay andreliable in transmission, and can efficiently improve data transmission throughput. The method is realized through the following technical solution: in an aircraft flight process, calculating of a pointing angle alpha of a phase control array antenna and an antenna pointing angle beta in real time by a relay terminal wave beam pointing calculation module, sending the same into a data finding module, using the pointing angle alpha of the phase control array antenna and the antenna pointing angle beta as a finding address to find and obtain actual effective isotropic radiated power (EIRP) of thephase control array antenna in real time from a memory of a relay terminal by the data finding module, sending the actual EIRP of the antenna into a threshold comparison criterion module, completingjudgment on the actual EIRP of the phase control array antenna and link status according to the antenna pointing angle alpha and the antenna pointing angle beta, and then completing self-adaptive adjustment of the communication rate according to the link status.

Description

technical field [0001] The invention relates to a method for adjusting the communication rate of satellite relay data transmission in the field of aircraft satellite communication. Background technique [0002] In the use of satellites for data transmission, satellites in orbit around the earth serve as relay stations for data transmission, which can improve the coverage of direct radio communication with the ground. Therefore, satellite data transmission is a powerful means to realize long-distance information transmission. In recent years, in order to improve the transmission rate and spectrum efficiency, many technologies have been proposed, such as multi-antenna and multi-carrier, and adaptive transmission is one of them. Before the emergence of adaptive transmission technology, in the communication process, the transmission mode used by the communication system was fixed, but the channel conditions changed with time. This fixed transmission mode prevented the system fro...

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Problems solved by technology

[0005] The task of the present invention is to provide a satellite relay data transmission system with low delay and can effectively improve the throughput of data transmission for the problem that the fixed transmission rate cannot make full use of link resources in the space-based return telemetry data transmission system of the aircraft. The open-loop adaptive communication rate adjustment method for transmission aims to provide an implementation method for adaptively adjusting the communication rate of the system through the pointing α angle and pointing β angle information of the phased array antenna carried by the aircraft during the return data transmission of the aircraft

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