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

A high dynamic environment, frequency hopping technology, applied in the field of satellite communication, can solve the problems of low synchronization rate, long signal time interval, long time required for synchronization sequence, etc., and achieve the effect of small frame overhead and high frame efficiency

Active Publication Date: 2021-06-22
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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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

Method used

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

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Embodiment Construction

[0021] refer to Figure 1 to Figure 3 , the frequency hopping frame structure of the satellite communication system is as follows figure 1 As shown, the satellite communication system transponder sends information according to the frequency hopping frame structure; the clock offset estimation method is as follows figure 2 As shown, the clock difference is calculated according to the difference between the number of clock cycles between N identical sequences and the number of reference clock cycles; the synchronous flow diagram is as follows image 3 As shown, after the ground station of the frequency hopping satellite communication system is turned on, it must first complete the acquisition of the synchronization sequence, and then perform clock offset estimation, frequency offset estimation and clock tracking. Based on the limited synchronous sequence in the frequency hopping frame structure, the present invention estimates and corrects the Doppler code deviation by using t...

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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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7156H04L27/00H04L25/02H04J3/06
CPCH04B1/7156H04B2001/71563H04B2001/71566H04J3/0638H04L25/0202H04L27/0014H04L2027/0024
Inventor 陈敬乔王赛宇王杨
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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