Anti-deception-jamming design based on multipoint correlation method for satellite navigation

Abstract

The invention discloses anti-deception-jamming design based on a multipoint correlation method for satellite navigation. A code tracking loop in a signal tracking loop is adopted to track multipoint signals, a sliding correlator whose signal is N chips ahead of a normal signal is arranged at a chip stripping stage of the signal tracking loop, whether a signal in the current tracking channel is a deception signal is judged by judging the energy peak value of the sliding correlator, the signal is rejected if the signal is the deception signal, and locking and tracking of a true signal are restored. When applied to satellite navigation systems, the method can realize rapid detection, judgment and rejection of deception-jamming signals, is low in design complexity, occupies few hardware resources and can be widely applied to the satellite navigation system of various platforms to realize rapid and high-performance anti-deception-jamming performance, and logic reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation adopting GPS or Beidou global satellite positioning system system, and in particular relates to a satellite navigation anti-spoofing interference design based on a multipoint correlation method. Background technique [0002] The anti-spoofing jamming design methods in the existing satellite navigation products are mostly through the method of signal capture and identification, and judge whether the signal is a deceptive jamming signal by multiple captures and identifications of the received signal in the signal capture device, so as to realize Signal identification and rejection. [0003] At present, the mainstream signal capturer adopts a two-dimensional search method combining matched filter and FFT. The matched filter and FFT logic used in this method rely heavily on hardware resources. It can achieve high-performance signal capture and anti-spoofing interference at the same time. ...

AI Technical Summary

Problems solved by technology

[0003] At present, the mainstream signal capturer adopts a two-dimensional search method combining matched filter and FFT. The matched filter and FFT logic used in this method rely heavily on hardware resources. It can achieve high-performance signal capture and anti-spoofing interference at the same time. , will greatly increase the complexity of the code, which will make the logic less reliable and robust, and will consume more logic resources

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