Anti-cheating interference signal processing method of GNSS time service type satellite receiver

Abstract

An anti-cheating interference signal processing method of a GNSS time service type satellite receiver is disclosed. The method comprises the following steps of stepS1, using a satellite to broadcast time information of a message so as to carry out mutual examination, receiving a GNSS satellite signal of multi-mode multi-frequency points, and detecting whether there is performed signal cheating for satellite time information, if there is the signal cheating, using a punctual time method to carry out an anti-cheating action, and if there is not the signal cheating, entering into a stepS2; stepS2, detecting whether adjacent time difference value of a local clock difference is greater than a preset threshold, if the adjacent time difference value of the local clock difference is greater than the preset threshold, determining that there is signal cheating which is performed aiming at time service precision so that a satellite receiver uses an automatic position maintenance function and enters into a clock punctuality state or indicates that a time service is unavailable; and if the adjacent time difference value of the local clock difference is not greater than the preset threshold, determining that there is no cheating-type interference signal and withdrawing a program. In the invention, telegraph text comparison, time punctuality, automatic position maintenance and other methods are used so that a purpose of an anti-cheating time service type satellite receiver is reached. A realization mode is simple and is easy to process and product cost is not increased.

Description

technical field [0001] The invention relates to a satellite navigation timing application method, in particular to an anti-spoofing interference signal processing method of a GNSS timing satellite receiver. Background technique [0002] With the development of satellite navigation technology and the continuous expansion of its application fields, satellite timing synchronization technology has been widely used in industries such as electric power, transportation, communication, banking and finance. The use of satellite timing can achieve wide-area high-precision clock synchronization and low cost. In particular, my country's Beidou satellite navigation system has been officially put into operation. Synchronization technology based on satellite clocks is playing an increasingly important role in China. Satellite timing Receiver security is becoming increasingly prominent. [0003] Satellite receivers face a variety of complex electromagnetic interference environments, which c...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing anti-spoofing methods cannot achieve deception elimination or need to add additional antennas or need to upgrade and transform the existing satellite navigation system, and the cost is high. In order to solve the above problems, a GNSS timing satellite is provided Anti-spoofing jamming signal processing method of receiver

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