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GNSS (Global Navigation Satellite System) forwarding deception jamming detection method based on C/N0-MV

A technology of deception jamming and detection method, applied in the directions of measurement devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve problems such as failure, achieve high detection efficiency, and shield the effect of satellite elevation angle.

Active Publication Date: 2021-09-17
SOUTHEAST UNIV
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  • Abstract
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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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  • GNSS (Global Navigation Satellite System) forwarding deception jamming detection method based on C/N0-MV
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  • GNSS (Global Navigation Satellite System) forwarding deception jamming detection method based on C/N0-MV

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0041] The present invention provides a C / N0-MV based GNSS transponder type spoofing interference detection method. When a spoofing signal appears, through a comprehensive investigation of the receiver noise floor and carrier-to-noise ratio, it is found that the carrier noise of the satellite at the time of broadcasting the spoofing signal Ratio fluctuates more than the original value, and the deceptive interference signal is detected by calculating the variance of the data set. The method utilizes the characteristic that the variance can represent the dispersion of data, and has the advantage of shielding the influence of the satellite elevation angle while realizing deceptive interference detection, which improves the detection efficiency and accuracy.

[0042] As a specific embodiment of the present invention, the present invention provides a...

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Abstract

The invention discloses a GNSS forwarding deception jamming detection method based on C / N0-MV. According to the method, a deception signal is detected by capturing the fluctuation degree of the carrier-to-noise ratio of a satellite during a deception attack by utilizing the characteristic that variance represents data dispersity. In the process, firstly, GNSS signals are preprocessed, a software receiver receives and captures signals and estimates a receiver noise floor, then the carrier-to-noise ratio C / N0 is calculated according to the signal-to-noise ratio SNR, then a fixed-length sliding window is set, a data set variance MV is calculated, a variance sequence is created, finally, a detection threshold is set, the variance sequence is detected, and through a semi-physical simulation experiment, whether deception interference occurs is detected. The method has the advantage of shielding the influence of the satellite elevation angle and is high in detection efficiency.

Description

technical field [0001] The invention relates to the field of GNSS satellite signals, in particular to a C / N0-MV-based GNSS forwarding deception interference detection method. Background technique [0002] With the continuous advancement of science and technology, Global Navigation Satellite System (GNSS) is widely used in various fields of modern society, but the signal structure and modulation method of its civilian credit are open, so it is easy to be deceived and interfered. It poses a huge threat to the security of GNSS services and the use of users. At present, the main man-made jamming includes suppression jamming and spoofing jamming, and spoofing jamming is more threatening. Deceptive jamming broadcasts a signal similar to the real signal, causing the receiver to generate false positioning information after receiving the wrong signal. Therefore, research on spoofing and anti-spoofing mechanisms is very important in modern GNSS applications, and research on GNSS ant...

Claims

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Application Information

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Patent Type & Authority Applications(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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