A Synchronization Method Applicable to High Dynamic Environment of Frequency Hopping Anti-jamming System

Abstract

The invention discloses a synchronization method suitable for a high dynamic environment of a frequency hopping anti-interference system, which relates to a high dynamic synchronization technology in the frequency hopping anti-interference system. Based on the limited synchronous sequence in the frequency hopping frame structure, the present invention estimates and corrects the Doppler code deviation by using the cycle difference statistics method, and eliminates the clock deviation caused by the Doppler code deviation. Carrier synchronization adopts segmented matched filtering, FFT frequency offset estimation based on segmented accumulation, etc., to realize large frequency offset search, frequency dynamic compensation and tracking. During the synchronization process, the estimation and correction of code offset and frequency offset cooperate with each other and are based on each other, making the synchronization performance of airborne and other high dynamic platforms stable and reliable. It is especially suitable for improving the anti-Doppler ability of the satellite frequency hopping communication system.

Description

technical field [0001] The invention relates to a synchronization method in the field of satellite communication, which is suitable for the high dynamic environment of frequency hopping anti-jamming systems, adapts to high dynamic characteristics, supports the application of various airborne platforms, and is especially suitable for improving the performance of high-speed frequency hopping systems in satellite communication The ability to resist Doppler frequency deviation and code deviation. Background technique [0002] In recent years, extensive and in-depth research has been carried out at home and abroad on the synchronization of communication receivers in high dynamic environments, and some high dynamic receivers have been developed and produced. However, there are not many studies on frequency hopping system synchronization technology under high dynamic environment conditions, and there is no mature technology and equipment to support the application of combat aircraf...

AI Technical Summary

Problems solved by technology

However, there are not many studies on frequency hopping system synchronization technology under high dynamic environment conditions, and there is no mature technology and equipment to support the application of combat aircraft platforms

[0003] Because the time interval of the signal used for synchronization in the frequency hopping system is relatively long, which means that the synchronization rate is very low, it takes a long time to receive the synchronization sequence, and the adjustment is slow. high, difficult to achieve

[0004] Due to the complex battlefield environment, it is difficult for general communication equipment to adapt to high-mobility platforms, which poses a serious threat to battlefield survivability

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