Global position system (GPS) deception jamming method and system

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...

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 longer be a visual signal. If the distance is too large, it will cause the receiver positioning error

Although this is also a deceptive interference, the receiver may receive the actual signal first, and may also receive the interference signal. The interference success rate of this method cannot be guaranteed

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