Multi-positioning system coupled anti-interference satellite positioning equipment

Abstract

The invention relates to multi-positioning-system coupled anti-interference satellite positioning equipment. The equipment comprises a processor chip, an inertial navigation chip and a satellite positioning chip which are integrated on a PCB substrate, and one satellite positioning chip is connected with one satellite receiving antenna to form a satellite positioning system; and the processor chip is configured to count the signal-to-noise ratio of satellite signals of each satellite positioning system, select the satellite positioning system with the maximum signal-to-noise ratio exceeding a first preset threshold value as a main positioning system, and the other satellite positioning systems as alternative positioning systems, switch one alternative positioning system into a new main positioning system and select a trustworthy system from other alternative positioning systems if it is determined that the number of satellites of the main positioning system is lower than a first preset number, and perform difference decreasing calculation on the inertial navigation positioning data and the satellite positioning data of the new main positioning system and the trustworthy system to obtain real-time positioning data. The equipment can reduce the fall of positioning data among different systems, and realizes smooth switching of the positioning systems.

Description

technical field [0001] The present application relates to the technical field of satellite positioning, in particular to an anti-jamming satellite positioning device coupled with multiple positioning systems. Background technique [0002] In the satellite navigation receiving system, because the power of the satellite navigation signal reaching the ground is relatively weak, it is easy to be submerged under the noise, and the signal-to-noise ratio entering the receiver is generally very low, so the satellite navigation system is susceptible to interference from complex electromagnetic environments or man-made interference. [0003] At present, satellite positioning anti-jamming technology often uses antenna arrays to receive satellite navigation signals, such as normal constraint anti-jamming mode and unconstrained anti-jamming mode. However, the normal-constrained anti-jamming mode is difficult to receive satellite signals with low elevation angles, and the total number of...

AI Technical Summary

Problems solved by technology

However, the normal-constrained anti-jamming mode is difficult to receive satellite signals with low elevation angles, and the total number of received satellites decreases. Especially when the antenna front is tilted, the satellite receiving situation will further deteriorate, which will affect the anti-jamming performance

The normal gain of the array in the unconstrained anti-jamming mode is not as good as that in the normal constrained anti-jamming mode, and once the main antenna fails, normal satellite reception cannot be guaranteed

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