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GNSS deception jamming signal detection system

A detection system, a technology of deceiving interference, applied in the direction of radio wave measurement system, satellite radio beacon positioning system, measurement device, etc., can solve the problem of long time-consuming interference signal detection method

Active Publication Date: 2020-04-03
BEIJING INST OF SPACECRAFT SYST ENG
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The technical solution problem of the present invention is: Aiming at the problem that the traditional GNSS spoofing interference signal detection method takes a long time, a detection system for GNSS spoofing interference signals is proposed, which is a fast detection system based on anti-aliasing filtering and extraction , which can reduce the calculation amount of deception interference detection

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  • GNSS deception jamming signal detection system

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Embodiment

[0059] Such as Figure 1-3 As shown, a detection system for GNSS spoofing interference signals, the system includes a radio frequency front-end module, a signal acquisition module and a signal interference detection module;

[0060] The radio frequency front-end module is used to convert the analog radio frequency signal received by the antenna into a digital intermediate frequency signal r(k) after down-conversion mixing, intermediate frequency signal filtering and amplification, and analog-to-digital conversion, and output to the signal capture module Filter extraction module A;

[0061] The filter extraction module A is used to receive the digital intermediate frequency signal r(k) input by the RF front-end module. The filter extraction module A performs anti-aliasing filtering and M-fold extraction on the digital intermediate frequency signal r(k), and extracts the result Output to multiplier A, multiplier B;

[0062] The local carrier generator A is used to generate th...

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Abstract

The invention relates to a GNSS deception jamming signal detection system and method, and is suitable for the technical field of GNSS deception jamming signal rapid detection. The method is a rapid detection method based on anti-aliasing filtering and extraction, and the deception jamming detection operand can be reduced. Compared with the prior art, a signal capturing module has the advantages that a filtering and extracting module is additionally arranged at the rear ends of the input signal, a local carrier generator and a local pseudo code generator, so that an operand of DFT can be obviously reduced, and the signal capturing speed is effectively increased. Compared with the prior art, a signal interference detection module has the advantages that the filtering and extracting module isadditionally arranged at the rear ends of the input signal, the local carrier generator and the local pseudo code generator, so that the multi-path correlation operation amount of leading, immediateand lagging can be obviously reduced, and the interference detection speed is effectively increased.

Description

technical field [0001] The invention relates to a detection system for GNSS deception interference signals, which is applicable to the technical field of rapid detection of GNSS deception interference signals. Background technique [0002] At present, navigation satellites and ground users often use code division multiple access technology (CDMA) to communicate. Although CDMA has a certain anti-interference ability, the signal power level reaching the ground receiver is low (about 20dB lower than the environmental noise level) ), so the receiver's anti-interference ability is weak. Nowadays, all countries are steadily promoting the construction of satellite navigation systems (GPS, GLONASS, Galileo, Beidou, Japan's quasi-zenith, and India's regional satellite navigation system), so that civilian precision positioning receivers often face the impact of unintentional interference (multiple access signals); Especially in war zones, GNSS jammers cooperate in operations, and nav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 申洋赫闫金栋皇甫松涛张晓松崔永军余速
Owner BEIJING INST OF SPACECRAFT SYST ENG