Joint anti-cheating method for authorized signals and public signals of GNSS (global navigation satellite system) receiver

Abstract

The invention discloses a joint anti-cheating method for authorized signals and public signals of a GNSS (global navigation satellite system) receiver with an aim to solve problems that navigation signals of public service face with greater cheating interference, a traditional anti-cheating method is only effective to specific cheating interference, the receiver faces with greater risks if adopting a singular anti-cheating method, however, implementation complexity of the receiver is undoubtedly increased if multiple anti-cheating methods are adopted at the same time. Based on the problem and characteristics of the authorized user receiver, AS signals are firstly subjected to anti-forward cheat processing to obtain the true AS signals, consistency check is performed on the AS signals and OS signals, and anti-cheating processing is performed on the OS signals. By the arrangement, anti-cheating performance in the authorized receiver can be effectively improved, and possibility of being cheated is reduced.

Description

technical field [0001] The invention relates to the field of development of navigation receiver equipment, in particular to a method for improving the anti-spoofing performance of the navigation receiver, which can be used in the development of receiving terminal equipment in satellite navigation systems. Background technique [0002] With the development of the Global Navigation Satellite System (GNSS: Global Navigation Satellite System), it will provide various services for different types of users. For example, the current GNSS satellites have broadcast authorized services (AS: Authorized Serve ) signals and open service (OS: Open Serve) signals, in which AS signals encrypt and authorize signal parameters, message information, etc., and only authorized users can use them; while the signal format parameters and other information of OS signals are completely known , users can use it for free without authorization. For authorized users, they can receive both AS signals and ...

AI Technical Summary

Problems solved by technology

The effectiveness of these methods is often only for specific deception interference, and in the actual environment, it is difficult to know the deception methods used by the deceitful party

When the spoofing pattern is unknown, the single anti-spoofing method will face a greater risk to the receiver, but if multiple anti-spoofing methods are used at the same time, it will undoubtedly increase the implementation complexity of the receiver

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