Code phase identification based deception signal detection method of satellite receiver

Abstract

The invention discloses a code phase identification based deception signal detection method of a satellite receiver. The method comprises the following steps that S1) when the satellite receiver recaptures and tracks signals, deception signal detection is carried out on the basis of code phase identification by utilizing peak value results related to pseudo code despreading in the baseband signal processing process of the satellite receiver; S2) if no deception signals are found via detection, a carrier movement state obtained by a track reckoning method and satellite movement state information obtained by ephemeris parameters are used to further carry out code phase identification on the recaptured and tracked signals, namely, the pseudo phase parameters despread by the satellite receiver are distinguished; and S3) if it is detected that the despreading demodulation signals of the satellite receiver include the deception signals, alarm is raised against the deception signals, the deception signals are isolated, and thus, capabilities of resisting cheating and interference of the satellite receiver are enhanced.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation and receiver signal processing, in particular to a method for detecting spoofing signals of satellite receivers based on code phase identification. Background technique [0002] As an important technical approach in the navigation field, satellite navigation can provide all-weather, continuous and high-precision three-dimensional position information to global users in real time. With the gradual development of various satellite navigation jamming and spoofing technologies, jamming and spoofing signals pose severe challenges to the accuracy, continuity and integrity of the satellite navigation system, especially the spoofing jamming will seriously threaten the positioning performance of the satellite navigation system. effective application. [0003] Most of the current satellite spoofing signal detection methods use multi-antenna methods to identify in the radio frequency signal pro...

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Problems solved by technology

[0004] Purpose of the invention: the technical problem to be solved by this invention is to provide a satellite receiver spoofing signal based on code phase identification for the development of satellite positioning spoofing technology in the prior art and the technical defect that spoofing signals threaten the reliable application of satellite receivers Detection method

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