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A c/n based 0 -MV's gnss forwarding spoofing interference detection method

A technology of deceiving interference and detection methods, applied in measuring devices, radio wave measuring systems, instruments, etc., can solve problems such as failure, achieve high detection efficiency, and shield the effect of satellite elevation angle

Active Publication Date: 2022-05-27
SOUTHEAST UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0003] The traditional carrier-to-noise ratio detection method detects spoofing interference by setting a certain threshold. When the satellite elevation angle causes the carrier-to-noise ratio to decrease, this method will fail

Method used

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  • A c/n based <sub>0</sub> -MV's gnss forwarding spoofing interference detection method
  • A c/n based <sub>0</sub> -MV's gnss forwarding spoofing interference detection method
  • A c/n based <sub>0</sub> -MV's gnss forwarding spoofing interference detection method

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0041] The present invention provides a C / N-based 0 -MV's GNSS forwarding spoofing jamming detection method, when a spoofing signal appears, through a comprehensive investigation of the receiver's noise floor and carrier-to-noise ratio, it is found that the satellite's carrier-to-noise ratio fluctuates more than the original value at the time of the spoofing signal broadcast. Set variance to detect spoofing jammers. The method utilizes the characteristics of variance to characterize the dispersion of data, and has the advantage of shielding the influence of satellite elevation angle while realizing deception jamming detection, which improves the detection efficiency and accuracy.

[0042] As a specific embodiment of the present invention, the present invention provides a C / N-based 0 -MV's GNSS forwarding spoofing interference detect...

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Abstract

The invention discloses a C / N-based 0 ‑MV’s GNSS forwarding spoofing detection method. This method uses variance to represent the characteristics of data dispersion, and detects spoofing signals by capturing the fluctuation of satellite carrier-to-noise ratio during spoofing attacks. In this process, the GNSS signal is preprocessed first, the software receiver receives the captured signal, estimates the receiver noise floor, and then calculates the carrier-to-noise ratio C / N according to the signal-to-noise ratio SNR 0 , then set a fixed-length sliding window, calculate the variance MV of the data set, create a variance sequence, and finally set the detection threshold to detect the variance sequence, and through half-physical simulation experiments to detect whether deception interference occurs. This method has the advantage of shielding the influence of satellite elevation angle and has high detection efficiency.

Description

technical field [0001] The invention relates to the field of GNSS satellite signals, in particular to a C / N-based 0 -MV's GNSS forwarding spoofing jamming detection method. Background technique [0002] With the continuous progress of science and technology, the Global Navigation Satellite System (GNSS) is widely used in various fields of modern society, but the signal structure and modulation method of its civil credit are open, so it is easily interfered by deception, It poses a huge threat to the security of GNSS services and the use of users. At present, the main man-made jamming includes suppressive jamming and deceptive jamming, among which deceptive jamming is more threatening. Deceptive jamming broadcasts a signal similar to the real signal, so that the receiver receives the wrong signal and generates false positioning information. Therefore, research on deception and anti-spoofing mechanisms is very important in modern GNSS applications, and research on GNSS anti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 祝雪芬黄璇杨帆汤新华陈熙源
Owner SOUTHEAST UNIV
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