Global position system (GPS) deception jamming method and system

A deceptive jamming and frequency converter technology, applied in the field of GPS satellite navigation, can solve the problems of unguaranteed jamming success rate, receiver positioning error, etc., and achieve the effects of increased combat effectiveness, low transmission power, and good concealment

Active Publication Date: 2013-01-09
GUILIN UNIV OF ELECTRONIC TECH
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AI Technical Summary

Problems solved by technology

Some jamming systems are also forwarding jamming, that is, they first receive the GPS signal from the satellite, and then amplify the signal and then transmit it to the target airspace. In this way, if the receiver in the target airspace receives the forwarding jamming signal, the distance measurement will no

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  • Global position system (GPS) deception jamming method and system
  • Global position system (GPS) deception jamming method and system

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Embodiment Construction

[0030] A GPS spoofing jamming system, such as figure 1 As shown, it is mainly composed of a digital GPS generator, a digital-to-analog converter, N frequency converters, a combiner, a power amplifier and a transmitting antenna. The output of the digital GPS generator is connected to the input of the digital-to-analog converter. The output terminals of the digital-to-analog converter are divided into multiple channels, and each channel is connected with an input terminal of a frequency converter. The output terminals of multiple frequency converters are commonly connected to multiple input terminals of the combiner. The output end of the combiner is connected with the transmitting antenna through the power amplifier. in:

[0031] Digital GPS generator: Firstly, according to the preset ephemeris parameters, it is encoded into a navigation message. Secondly, according to the C / A code structure of the 32 satellites of the GPS signal, the C / A codes of all 32 satellites are gene...

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Abstract

The invention discloses a global position system (GPS) deception jamming method and a GPS deception jamming system. The GPS deception jamming system comprises a GPS signal digital generating module and a radio frequency emitting part. A GPS deception jamming signal generating part is mainly composed of a field programmable gata array(FPGA) digital platform and used for generating a digital GPS jamming signal. The radio frequency emitting part includes a plurality of transducers, wherein the traducers are used for changing the digital GPS jamming signal to a nominal frequency of the GPS satellite signal and a plurality of frequencies up and down the nominal frequency of the GPS satellite signal, and emitting the radio frequency signal through an antenna; possibility of receiving signals by the GPS receiver is largely increased, the deception jamming can be realized for the GPS receiver with certain airspace. Compared with the traditional GPS jamming system, the emitting power of the jamming system is much smaller, and own safety can be guaranteed. Furthermore, the goal GPS receiver is positioned to a wrong position, and thus, the GPS losses a fighting effect.

Description

technical field [0001] The invention relates to the field of GPS satellite navigation, in particular to a GPS deceptive interference method and system. Background technique [0002] The GPS (Global Positioning System) of the United States is currently the most widely used satellite navigation system. GPS positioning has the characteristics of all-weather and high precision, and is widely used in military and civilian fields. Today's weapon systems, such as precision-guided missiles, rely more and more on the positioning of GPS receivers for control. Therefore, in order to counter such GPS-guided weapons, GPS jammers have extensive demands. Now the GPS jamming system mainly transmits high-power broadband signals or narrowband signals to achieve suppressive interference in a certain airspace, blocking the GPS receiver system and making it impossible to locate. However, the transmission of high-power signals may be detected by enemy radars, and they will lose their interferen...

Claims

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Application Information

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IPC IPC(8): G01S19/01
Inventor 孙希延纪元法邓洪高王守华符强吴孙勇
Owner GUILIN UNIV OF ELECTRONIC TECH
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