Burst frequency hopping transmission rapid synchronization method suitable for satellite communication

Abstract

The invention discloses a burst frequency hopping transmission rapid synchronization method suitable for satellite communication, which relates to a frequency hopping synchronization technology in satellite communication and comprises the following steps that: step 1, a user station receives broadcast TOD information and estimates signal propagation delay at the same time; step 2, the user stationcalculates a reference TOD value when the burst frequency hopping signal is sent, and generates a frequency hopping pattern; step 3, the user station sends synchronization and data information according to the burst frequency hopping signal frame structure and the frequency hopping pattern; and step 4, the ground station carries out burst frequency hopping signal capture and TOD value recovery torealize rapid frequency hopping synchronization. The synchronous sequence carrier frequency in the burst frequency hopping signal is designed to be hopped according to the frequency hopping pattern,the anti-interference performance and the anti-reconnaissance positioning performance of the burst signal are guaranteed, and meanwhile a synchronous signal structure is designed at the sending end, so that the receiving end can complete rapid synchronization of the burst frequency hopping signal.

Description

technical field [0001] The invention relates to a fast synchronization method for burst frequency hopping transmission in satellite communication, belonging to the field of satellite communication. Background technique [0002] Satellite communication has the characteristics of covering a wide area, not being affected by geographical conditions and land disasters, and having a large communication capacity. It has been widely used in military, commercial, and emergency relief and other fields. But the openness of satellite channels makes them easy to be jammed and intercepted. In order to effectively improve the anti-interference and anti-interception capabilities of satellite communications, frequency hopping technology is introduced into satellite communications, thereby integrating the technical advantages of frequency hopping in anti-interference and anti-interception. In frequency hopping satellite communication, considering that the transmission of some special user st...

AI Technical Summary

Problems solved by technology

Among them, in the frequency hopping synchronization method based on TOD, the carrier frequency of the synchronization sequence can be hopped, which has strong anti-interference and anti-reconnaissance capabilities, but it cannot be applied to burst frequency hopping transmission.

The frequency hopping synchronization of the burst frequency hopping signal mainly adopts the synchronization header method, and the synchronization header transmission uses a fixed frequency point, which reduces the anti-interference and anti-reconnaissance capabilities of the burst frequency hopping signal

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