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A Multi-User Collaboration-based Locating Method of Forwarding Spoofing Source

A technology of multi-user collaboration and positioning method, which is applied in the field of forwarding deception source positioning to achieve the effect of simplifying the application complexity and promoting the application

Active Publication Date: 2019-05-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies treat the interference source simply as an interference signal.

Method used

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  • A Multi-User Collaboration-based Locating Method of Forwarding Spoofing Source
  • A Multi-User Collaboration-based Locating Method of Forwarding Spoofing Source
  • A Multi-User Collaboration-based Locating Method of Forwarding Spoofing Source

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Embodiment Construction

[0013] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0014] figure 1 It shows a schematic diagram of the possible position of the spoofing source in an ideal state. It is assumed that the spoofing source will forward it immediately once it receives the satellite signal. At this time, the direct signal of satellite A (that is, the real signal) and the forwarded signal (that is, the spoofing signal sent by the spoofing source) The time difference τ (referred to as fraudulent time difference) to reach user u will be determined by the satellite position P A (t), spoofing source position P s , user location P u The relative positional geometric relationship between them is determined, and it satisfies:

[0015] ||P s -P A (...

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Abstract

The present invention provides a method for locating a forwarding deception source based on multi-user cooperation, and obtains the position of the deception source based on the positions of at least four users, the position of a single satellite, and the deception time difference of each user corresponding to the same false signal ; Wherein, all the deception time difference is the time difference between the real signal transmitted by a single satellite and the same false signal corresponding to the real signal forwarded by the spoofing source and arriving at the corresponding user. Compared with the existing TDoA interference source positioning technology that requires multiple users to be strictly time-synchronized, the present invention has no such requirement, which greatly simplifies the application complexity of the present invention and is more widely used.

Description

technical field [0001] The present invention relates to the field of navigation and positioning, and more specifically, to a positioning method of forwarding deception sources based on multi-user cooperation. Background technique [0002] Global satellite navigation system (GNSS), including GPS, GLONASS, Galileo, Beidou and other regional systems and augmentation systems, can provide accurate positioning, navigation, and timing services for global users. Due to its good performance and low cost, it has been widely used In the fields of commerce, transportation, electric power, aerospace, earthquake relief, etc., it also plays an extremely important role in the military. However, the navigation satellites are far away from the earth, the signal power reaching the ground is weak, the civil navigation system structure is open, and the signal system is open. These factors make it possible to artificially deceive satellite navigation receiving equipment. Spoofing attack is a kin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 李洪陆明泉
Owner TSINGHUA UNIV