CN104678406A - Repeater deception type GPS (Global Position System) jamming system and jamming method thereof - Google Patents
Repeater deception type GPS (Global Position System) jamming system and jamming method thereof Download PDFInfo
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- CN104678406A CN104678406A CN201510055000.6A CN201510055000A CN104678406A CN 104678406 A CN104678406 A CN 104678406A CN 201510055000 A CN201510055000 A CN 201510055000A CN 104678406 A CN104678406 A CN 104678406A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a repeater deception type jamming system and a jamming method thereof. The repeater deception type jamming system comprises reconnaissance receivers, a digital analog converter, a frequency converter, a combiner, a power amplifier, a transmission system, a jammer delayer and a jamming transmitter, wherein the frequency converter comprises an up-converter and a down converter; the combiner comprises an upper combiner and a lower combiner; eight reconnaissance receivers are provided, and each reconnaissance receiver comprises a large-diameter reflector antenna and an automatic tracking system; the transmission system adopts a wire transmission mode or a wireless transmission mode; the jammer delayer is a fixed tapped delayer with a plurality of tap positions, and a delay array is composed by a CPLD (Complex Programmable Logic Device) for each jammer delayer. The repeater deception type jamming system and the jamming method have the advantages that the jammer is small in interference emission size and light in weight, the large-diameter reflector antennas are adopted to obtain the high gain, the carrier to noise ratio of a GPS signal is improved, despreading is not needed, a sending part and a receiving part are insulated and connected by the transmission system, the insulation difficulty of the sending and the receiving is avoided, the remote transmission effect is also achieved, and a far effective jamming distance can be realized.
Description
Technical field
The present invention relates to gps satellite navigation field, particularly relate to a kind of forwarding deception formula GPS EVAC (Evacuation Network Computer Model) and interference method thereof.
Background technology
In modern war, the Information Technology Methods such as GPS, satellite monitoring, optical fiber communication, internet, high sensor, precision guided weapon have been full of whole battlefield, the effect of navigation is also day by day very important, GPS is the satellite navigation system of current most widespread use, GPS location has round-the-clock, precision high, have application widely in military-civil field, GPS will become the key of the accurate command & control of enemy state and ally thereof, precision strike and accurate force projection.They take to contain and the policy weakening China always for a long time, and therefore, improving the homing capability of oneself army to greatest extent, contain the homing capability of enemy to greatest extent, is vital to the process of war.
The interference to ground control station can be divided into the interference of gps system, the data feedback channel of GPS land station is disturbed, the down channel of GPS is disturbed.And exactly the down channel of GPS being disturbed of most possibly realizing.Interference is carried out to the down channel of GPS and can be divided into suppress interfere and the large class of Deceiving interference two.
Present GPS EVAC (Evacuation Network Computer Model) mainly launches powerful broadband signal or narrow band signal realizes suppress interfere to certain spatial domain, blocks GPS system, makes it locate.But launch high-power signal likely to be found by enemy radar, hit and lose interference effect.Also the EVAC (Evacuation Network Computer Model) had is repeating jamming, namely first receive the gps signal from satellite, then signal is carried out amplifying the transmitting of backward target spatial domain, if the receiver in such target spatial domain receives repeating jamming signal, range observation has been no longer just sighting distance, can cause receiver Wrong localization.Although this is also a kind of Deceiving interference, receiver likely first receives actual signal, also likely receives undesired signal, and the interference success ratio of this method can not ensure.
Summary of the invention
The object of the present invention is to provide that a kind of emissive power is little, the forwarding of self good concealment deception formula GPS EVAC (Evacuation Network Computer Model) and interference method thereof, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of forwarding deception formula GPS EVAC (Evacuation Network Computer Model), comprise receipts machine of detecing, digital to analog converter, frequency converter, combiner, power amplifier, transmission system, jammer chronotron and jamming transmitter, described frequency converter comprises upconverter and low-converter, described combiner comprises combiner and lower combiner, described in detect the input end of the output terminal linking number weighted-voltage D/A converter of receipts machine; The output terminal of digital to analog converter is connected with the input end of multiple low-converter respectively; The output terminal of multiple low-converter is connected on multiple input ends of lower combiner jointly; The output terminal of lower combiner is connected with the input end of jamming transmitter via transmission system, and the output terminal of jamming transmitter is connected power amplifier by jammer chronotron, upper combiner with upconverter successively.
As the further scheme of the present invention: described in detect receipts machine and be provided with eight.
As the further scheme of the present invention: described in detect receipts machine and comprise heavy caliber reflector antenna and automatic tracking system.
As the further scheme of the present invention: described transmission system adopts wire transmission mode or wireless transmission method.
As the present invention's further scheme: described jammer chronotron is the fixed taps formula chronotron of points some grades, and every road jammer chronotron forms time delay array by CPLD.
The interference method of described forwarding deception formula GPS EVAC (Evacuation Network Computer Model), concrete steps are as follows:
(1) according to the difference at gps satellite azimuth pitch angle, adjust each orientation detecing the heavy caliber reflector antenna in receipts machine with automatic tracking function and angle of pitch, make controlling antenna wave beam to point and follow the tracks of certain selected gps satellite;
(2) heavy caliber reflector antenna receives the carrier signal that gps satellite is launched, and utilizes the high-gain of heavy caliber reflector antenna to improve the carrier-to-noise ratio of gps signal, extracts carrier signal by digital to analog converter;
(3) after utilizing low-converter to carry out down coversion, carrier signal is become analog intermediate frequency signal, be then demodulated into the baseband signal comprising pseudo-random code;
(4) regenerated signal is obtained after baseband signal being carried out signal syntheses by lower combiner;
(5) each road regenerated signal is sent to GPS jamming transmitter respectively by transmission system, the regenerated signal of every gps satellite is divided into some roads by jamming transmitter, every road adopts jammer chronotron to carry out different time delays, a road is combined into again by upper combiner, after modulation, upconvert to L1 frequency, L2 frequency and L5 frequency by upconverter, carry out small frequency amplification through power amplifier and obtain regeneration time delay cheating interference signal;
(6) the regeneration time delay cheating interference signal obtained in step (5) is carried out high-power amplification, become the laggard row of relationship type compacting interference and launch, force target GPS losing lock;
(7) launch regeneration time delay cheating interference signal, the target GPS of losing lock is locked on Deceiving interference signal.
Compared with prior art, the invention has the beneficial effects as follows:
In the present invention, interference transmitting volume is little, lightweight, heavy caliber reflector antenna is adopted to obtain high-gain, improve the carrier-to-noise ratio of gps signal, do not need despreading, the gps satellite baseband signal comprising pseudo-random code is just obtained only by demodulation, this signal regeneration process overcomes the difficulty that existing Deceiving interference system is difficult to solve Y code and M code, transceiver part is isolated by transmission system and couples together, both transceiver insulation problem had been avoided, solve again remote transmission problem, regeneration time delay cheating interference signal power is little, not only not easily be detected, and far effective interference distance can be realized.
Accompanying drawing explanation
Fig. 1 is structural schematic block diagram of the present invention.
Fig. 2 is the gps signal spectrogram before the present invention does not add noise when emulating.
Fig. 3 is the regeneration time delay cheating interference signal spectrum figure before the present invention does not add noise when emulating.
Fig. 4 is the gps signal spectrogram after the present invention adds noise when emulating.
Fig. 5 is the regeneration time delay cheating interference signal spectrum figure after the present invention adds noise when emulating.
Fig. 6 is the present invention gps signal circular correlation peak value figure when emulating.
Fig. 7 is the present invention regeneration time delay cheating interference signal cycle correlation peak figure when emulating.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
A kind of forwarding deception formula GPS EVAC (Evacuation Network Computer Model), comprise and detect receipts machine, digital to analog converter, frequency converter, combiner, power amplifier, transmission system, jammer chronotron and jamming transmitter, described receipts machine of detecing comprises heavy caliber reflector antenna and automatic tracking system, be mainly used to receive gps signal and extract carrier wave, baseband signal needed for acquisition, heavy caliber reflector antenna is adopted to be to obtain the high-gain suitable with de-spreading gain to extract signal carrier, and eliminate despreading link, no matter gps satellite adopts the P code of encryption or novel M code, EVAC (Evacuation Network Computer Model) is all effective, all can jamming target GPS comprehensively, target GPS is forced accurately to locate, described frequency converter comprises upconverter and low-converter, described combiner comprises combiner and lower combiner, the described input end detecing the output terminal linking number weighted-voltage D/A converter of receipts machine, the output terminal of digital to analog converter is connected with the input end of multiple low-converter respectively, the output terminal of multiple low-converter is connected on multiple input ends of lower combiner jointly, the output terminal of lower combiner is connected with the input end of jamming transmitter via transmission system, the output terminal of jamming transmitter is successively by jammer chronotron, upper combiner is connected power amplifier with upconverter, described transmission system adopts wire transmission mode or wireless transmission method, thus jamming transmitter can be placed flexibly, even if also can disturb away from detecing receipts machine, can also networking carry out three-dimensional, cloth configuration disturbs, thus be easy to arrange flexibly, different target is carried out to the interference of optimum composition method, wire transmission mode can adopt fibre-optic transmission system (FOTS) or rent the optical cable transmission system of existing communication system, wireless transmission method first by the L frequency range carrier wave frequency conversion of extraction for rolling frequency range or C frequency range, Syncom is transmitted into by connecting station, the incoming only station of various places is transmitted to again by synchronous satellite, incoming only station is broadcast to each jamming transmitter by high powered antenna, described jammer chronotron is the fixed taps formula chronotron of points some grades, every road jammer chronotron forms time delay array by CPLD, to complete, the data stream of each branch road is postponed.
The interference method of described forwarding deception formula GPS EVAC (Evacuation Network Computer Model), concrete steps are as follows:
(1) according to the difference at gps satellite azimuth pitch angle, adjust each orientation detecing the heavy caliber reflector antenna in receipts machine with automatic tracking function and angle of pitch, make controlling antenna wave beam to point and follow the tracks of certain selected gps satellite;
(2) heavy caliber reflector antenna receives the carrier signal that gps satellite is launched, and utilizes the high-gain of heavy caliber reflector antenna to improve the carrier-to-noise ratio of gps signal, extracts carrier signal by digital to analog converter;
(3) after utilizing low-converter to carry out down coversion, carrier signal is become analog intermediate frequency signal, be then demodulated into the baseband signal comprising pseudo-random code;
(4) regenerated signal is obtained after baseband signal being carried out signal syntheses by lower combiner;
(5) each road regenerated signal is sent to GPS jamming transmitter respectively by transmission system, the regenerated signal of every gps satellite is divided into some roads by jamming transmitter, every road adopts jammer chronotron to carry out different time delays, a road is combined into again by upper combiner, after modulation, upconvert to L1 frequency, L2 frequency and L5 frequency by upconverter, carry out small frequency amplification through power amplifier and obtain regeneration time delay cheating interference signal;
(6) the regeneration time delay cheating interference signal obtained in step (5) is carried out high-power amplification, become the laggard row of relationship type compacting interference and launch, force target GPS losing lock;
(7) launch regeneration time delay cheating interference signal, the target GPS of losing lock is locked on Deceiving interference signal.
Described relationship type compacting interference forces target GPS losing lock to enter search condition after launching, when target GPS resets original state search positioning signal, at the receiving end of target GPS except various noise, regeneration time delay cheating interference signal and gps satellite signal depositing, target GPS after losing lock likely searches the former when searching for positioning signal, also likely searches the latter.If search regeneration time delay cheating interference signal, gps satellite signal is just considered to interference, target GPS loop has very large isolation to it, if search gps satellite signal, regeneration time delay cheating interference signal is then interference, target GPS loop has very large isolation to it, and interference is crucial and mark successfully, makes target GPS first catch regeneration time delay cheating interference signal exactly.
Refer to Fig. 2-7, simulation analysis is carried out to the interference method of described forwarding deception formula GPS EVAC (Evacuation Network Computer Model), capturing GPS actual signal is: C/A code starting point pt_init=3577, thick frequency cfrq=1248000, the peak value amp=731.2235 that gps signal obtains after catching, medium frequency fr=1248200, angular difference zc5fix=4.8395,-2.4101,-2.1539, 3.0739, essence is frr=1.2482e+006 frequently, capturing regeneration time delay cheating interference signal is: C/A code starting point pt_init1=4386, thick frequency cfrq1=1246000, the peak value amp1=983.064 obtained after regeneration time delay cheating interference signal capture, medium frequency fr1=1245800, angular difference zc5fix1=-2.6846, 3.8245,-2.9229, 2.2651, essence is frr1=1.2457e+006 frequently.From two peak value amp and ampl, many signal to noise ratio (S/N ratio)s that regeneration time delay cheating interference signal has had, more easily for target GPS is caught, from starting point Pt_init and the Pt_initl of C/A code, the time delay of regeneration time delay cheating interference signal can cause the starting point of pseudo-random code to offset, also be just equivalent to offset by certain distance, suitably change and accurate delay of control as long as visible, just can cause certain positioning error.
In the present invention, interference transmitting volume is little, lightweight, heavy caliber reflector antenna is adopted to obtain high-gain, improve the carrier-to-noise ratio of gps signal, do not need despreading, the gps satellite baseband signal comprising pseudo-random code is just obtained only by demodulation, this signal regeneration process overcomes the difficulty that existing Deceiving interference system is difficult to solve Y code and M code, transceiver part is isolated by transmission system and couples together, both transceiver insulation problem had been avoided, solve again remote transmission problem, regeneration time delay cheating interference signal power is little, not only not easily be detected, and far effective interference distance can be realized.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (6)
1. one kind forwards deception formula GPS EVAC (Evacuation Network Computer Model), comprise receipts machine of detecing, digital to analog converter, frequency converter, combiner, power amplifier, transmission system, jammer chronotron and jamming transmitter, it is characterized in that, described frequency converter comprises upconverter and low-converter, described combiner comprises combiner and lower combiner, described in detect the input end of the output terminal linking number weighted-voltage D/A converter of receipts machine; The output terminal of digital to analog converter is connected with the input end of multiple low-converter respectively; The output terminal of multiple low-converter is connected on multiple input ends of lower combiner jointly; The output terminal of lower combiner is connected with the input end of jamming transmitter via transmission system, and the output terminal of jamming transmitter is connected power amplifier by jammer chronotron, upper combiner with upconverter successively.
2. forwarding deception formula GPS EVAC (Evacuation Network Computer Model) according to claim 1, is characterized in that, described in detect receipts machine and be provided with eight.
3. forwarding deception formula GPS EVAC (Evacuation Network Computer Model) according to claim 1, is characterized in that, described in detect receipts machine and comprise heavy caliber reflector antenna and automatic tracking system.
4. forwarding deception formula GPS EVAC (Evacuation Network Computer Model) according to claim 1, is characterized in that, described transmission system adopts wire transmission mode or wireless transmission method.
5. forwarding deception formula GPS EVAC (Evacuation Network Computer Model) according to claim 1, is characterized in that, described jammer chronotron is the fixed taps formula chronotron of points some grades, and every road jammer chronotron forms time delay array by CPLD.
6. an interference method for the forwarding deception formula GPS EVAC (Evacuation Network Computer Model) as described in as arbitrary in claim 1-4, it is characterized in that, concrete steps are as follows:
(1) according to the difference at gps satellite azimuth pitch angle, adjust each orientation detecing the heavy caliber reflector antenna in receipts machine with automatic tracking function and angle of pitch, make controlling antenna wave beam to point and follow the tracks of certain selected gps satellite;
(2) heavy caliber reflector antenna receives the carrier signal that gps satellite is launched, and utilizes the high-gain of heavy caliber reflector antenna to improve the carrier-to-noise ratio of gps signal, extracts carrier signal by digital to analog converter;
(3) after utilizing low-converter to carry out down coversion, carrier signal is become analog intermediate frequency signal, be then demodulated into the baseband signal comprising pseudo-random code;
(4) regenerated signal is obtained after baseband signal being carried out signal syntheses by lower combiner;
(5) each road regenerated signal is sent to GPS jamming transmitter respectively by transmission system, the regenerated signal of every gps satellite is divided into some roads by jamming transmitter, every road adopts jammer chronotron to carry out different time delays, a road is combined into again by upper combiner, after modulation, upconvert to L1 frequency, L2 frequency and L5 frequency by upconverter, carry out small frequency amplification through power amplifier and obtain regeneration time delay cheating interference signal;
(6) the regeneration time delay cheating interference signal obtained in step (5) is carried out high-power amplification, become the laggard row of relationship type compacting interference and launch, force target GPS losing lock;
(7) launch regeneration time delay cheating interference signal, the target GPS of losing lock is locked on Deceiving interference signal.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717492A (en) * | 2016-01-27 | 2016-06-29 | 中国人民解放军国防科学技术大学 | GNSS anti-deception method based on double receivers |
| CN106896377A (en) * | 2017-02-07 | 2017-06-27 | 南京航空航天大学 | A kind of implementation method of GNSS relay types fraud system |
| CN107247273A (en) * | 2017-05-05 | 2017-10-13 | 西安电子科技大学 | A kind of GPS separate types dynamical feedback interference method |
| WO2017197939A1 (en) * | 2016-05-19 | 2017-11-23 | 湖南矩阵电子科技有限公司 | Anti-unmanned aerial vehicle method and system |
| CN107462906A (en) * | 2017-07-24 | 2017-12-12 | 湖南国科防务电子科技有限公司 | A kind of method and system based on Big Dipper satellite signal regeneration gps signal |
| CN108562915A (en) * | 2018-01-25 | 2018-09-21 | 扬州市职业大学 | A kind of GPS pressing types conflicting mode |
| CN110632620A (en) * | 2019-09-04 | 2019-12-31 | 北京航空航天大学 | Satellite-borne forwarding type deception jamming system capable of simultaneously supporting GPS civil code and military code |
| CN111025355A (en) * | 2019-10-16 | 2020-04-17 | 南阳师范学院 | Tower type indoor positioning system and method based on GPS signals |
| CN112596078A (en) * | 2020-12-19 | 2021-04-02 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Satellite navigation deception jamming detection method based on carrier-to-noise ratio statistics |
| CN116381732A (en) * | 2023-05-29 | 2023-07-04 | 湖南跨线桥航天科技有限公司 | Efficient GPS P code signal accurate interference method and system |
| WO2024016483A1 (en) * | 2022-07-18 | 2024-01-25 | 湖南卫导信息科技有限公司 | Forwarding type satellite navigation deception jamming system and method |
| CN117590430A (en) * | 2023-11-27 | 2024-02-23 | 湖南跨线桥航天科技有限公司 | M code signal smart interference method for GPS captured by punching code |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717492A (en) * | 2016-01-27 | 2016-06-29 | 中国人民解放军国防科学技术大学 | GNSS anti-deception method based on double receivers |
| CN105717492B (en) * | 2016-01-27 | 2017-12-29 | 中国人民解放军国防科学技术大学 | A kind of anti-deception measures of GNSS based on double-receiver |
| WO2017197939A1 (en) * | 2016-05-19 | 2017-11-23 | 湖南矩阵电子科技有限公司 | Anti-unmanned aerial vehicle method and system |
| CN106896377A (en) * | 2017-02-07 | 2017-06-27 | 南京航空航天大学 | A kind of implementation method of GNSS relay types fraud system |
| CN107247273A (en) * | 2017-05-05 | 2017-10-13 | 西安电子科技大学 | A kind of GPS separate types dynamical feedback interference method |
| CN107462906A (en) * | 2017-07-24 | 2017-12-12 | 湖南国科防务电子科技有限公司 | A kind of method and system based on Big Dipper satellite signal regeneration gps signal |
| CN108562915A (en) * | 2018-01-25 | 2018-09-21 | 扬州市职业大学 | A kind of GPS pressing types conflicting mode |
| CN110632620A (en) * | 2019-09-04 | 2019-12-31 | 北京航空航天大学 | Satellite-borne forwarding type deception jamming system capable of simultaneously supporting GPS civil code and military code |
| CN111025355A (en) * | 2019-10-16 | 2020-04-17 | 南阳师范学院 | Tower type indoor positioning system and method based on GPS signals |
| CN111025355B (en) * | 2019-10-16 | 2023-03-21 | 南阳师范学院 | Tower type indoor positioning system and method based on GPS signals |
| CN112596078A (en) * | 2020-12-19 | 2021-04-02 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Satellite navigation deception jamming detection method based on carrier-to-noise ratio statistics |
| WO2024016483A1 (en) * | 2022-07-18 | 2024-01-25 | 湖南卫导信息科技有限公司 | Forwarding type satellite navigation deception jamming system and method |
| CN116381732A (en) * | 2023-05-29 | 2023-07-04 | 湖南跨线桥航天科技有限公司 | Efficient GPS P code signal accurate interference method and system |
| CN116381732B (en) * | 2023-05-29 | 2023-09-15 | 湖南跨线桥航天科技有限公司 | Efficient GPS P code signal accurate interference method and system |
| CN117590430A (en) * | 2023-11-27 | 2024-02-23 | 湖南跨线桥航天科技有限公司 | M code signal smart interference method for GPS captured by punching code |
| CN117590430B (en) * | 2023-11-27 | 2024-04-19 | 湖南跨线桥航天科技有限公司 | M code signal smart interference method for GPS captured by punching code |
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