GNSS anti-deception method based on double receivers

A dual receiver and receiver technology, applied in the field of satellite navigation, can solve the problem of long time, achieve the effects of rapid detection, simple implementation and small calculation amount

Active Publication Date: 2016-06-29
NAT UNIV OF DEFENSE TECH
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However, the implementation of this method requires th...

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  • GNSS anti-deception method based on double receivers
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  • GNSS anti-deception method based on double receivers

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Embodiment Construction

[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but this does not constitute a limitation of the present invention.

[0030] Such as Figure 1 to Figure 3 As shown, a kind of GNSS anti-spoofing method based on dual receivers in this embodiment, its flow chart is as follows figure 1 shown, including the following steps:

[0031] S1: Set up two GNSS receivers. The distance between the two GNSS receivers is required to be no less than 10m. The detection performance can be improved by increasing the baseline length between the two receivers, that is, the distance between the two receiver antennas. , but the baseline length cannot be greater than 1km. These two GNSS receivers constitute a dual-receiver spoofing detection system;

[0032] When only real satellite signals exist, their spatial distribution is as follows figure 2 As shown, the pseudorange single difference of the two receivers at...

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Abstract

The invention discloses a GNSS anti-deception method based on double receivers. The method comprises the following steps that a double-receiver deception detection system is constructed; each receiver processes received navigation satellite signals to obtain pseudo range values from different satellites to the receiver; a single-difference detection quantity of the pseudo range and a detection threshold are determined; when the single-difference detection quantity of the pseudo range is lower than the detection threshold, it is determined that deception interference signals exist at present; and when the single-difference detection quantity of the pseudo range is greater than the detection threshold, a present signal is determined to be a true signal. The GNSS anti-deception method is easy to realize and low in cost, and two common GNSS receivers can form one detection system; the computational complexity is low, detection is rapid, and the single difference of pseudo range can be directly used to complete deception detection; and the application range is wide, and deception detection can be completed if only there is pseudo range output no matter whether signals are strong or weak.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a dual receiver-based global navigation satellite system (Global Positioning Satellite System, GNSS) anti-spoofing method. Background technique [0002] At present, the position, velocity and time (PVT: Position, Velocity and Time) service provided by GNSS has a profound impact on people's lives, and is widely used in vehicle transportation navigation, aircraft navigation and landing systems, power grid time synchronization, digital communication network time synchronization, banking, etc. And time synchronization of stock market transactions, emergency rescue, vehicle positioning in car rental and other fields. With the deepening of applications, people are paying more and more attention to the safety and reliability of satellite navigation applications; however, because the GNSS signals reaching the ground are relatively weak, and the working frequency and signal s...

Claims

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 黄龙肖岭唐小妹马鹏程李柏渝肖志斌楼生强刘哲李蓬蓬
Owner NAT UNIV OF DEFENSE TECH
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