CN112904377A - Beidou short message anti-interference method and device, computer equipment and storage medium - Google Patents
Beidou short message anti-interference method and device, computer equipment and storage medium Download PDFInfo
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- CN112904377A CN112904377A CN202110063202.0A CN202110063202A CN112904377A CN 112904377 A CN112904377 A CN 112904377A CN 202110063202 A CN202110063202 A CN 202110063202A CN 112904377 A CN112904377 A CN 112904377A
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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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- 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
- G01S19/015—Arrangements for jamming, spoofing or other methods of denial of service of such systems
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- Radar, Positioning & Navigation (AREA)
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a Beidou short message anti-interference method, a Beidou short message anti-interference device, computer equipment and a storage medium, relates to the technical field of global satellite navigation, and is used for inhibiting interference of airborne Beidou short message receiving and transmitting equipment on an airborne GPS receiver. The main technical scheme of the invention is as follows: acquiring a signal received by a GPS antenna and a Beidou short message signal transmitted by a Beidou short message antenna; calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna; and carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals.
Description
Technical Field
The invention relates to the technical field of global satellite navigation, in particular to a Beidou short message anti-interference method, a Beidou short message anti-interference device, computer equipment and a storage medium.
Background
The Beidou satellite navigation system consists of a space section, a ground section and a user section. The spatial segment includes 5 geostationary orbit satellites (respectively fixed at 58.75 degrees, 80 degrees, 110.5 degrees, 140 degrees and 160 degrees east longitude) and 30 non-geostationary orbit satellites; the ground section comprises a plurality of ground stations such as a master control station, a person injection station and a monitoring station; the user segment comprises a Beidou user terminal and terminals compatible with other satellite navigation systems.
The 5 static orbit satellites in the space section have an RDSS short message communication function, the coverage range of the communication function is 5-55 degrees in north latitude, the upper part of the area between 7-140 degrees in east longitude is big and small, and the widest part is about 35 degrees in north latitude. Within the range, the short message communication service is provided for the user all day long, and no communication blind area exists.
The uplink frequency used by the Beidou short message is 1610-1626.5MHz and is close to the frequency (1575.42MHz) of the L1 frequency point of the airborne GPS receiver. In the operation process of the Beidou satellite and the GPS, the GPS receiver is interfered by a signal transmitted by the Beidou short message equipment, so that the GPS receiver is unavailable in the Beidou short message transmission period. Therefore, the big dipper short message transmitting signal needs to be suppressed in the GPS receiver. At present, the anti-interference method of the GPS mostly solves the problems of space electromagnetic radiation noise resistance, fraud resistance and the like, and a method for transmitting signal interference by Beidou short messages is not available.
Disclosure of Invention
The invention provides a Beidou short message anti-interference method, a Beidou short message anti-interference device, computer equipment and a storage medium, which are used for inhibiting interference of airborne Beidou short message receiving and transmitting equipment on an airborne GPS receiver.
The embodiment of the invention provides a Beidou short message anti-interference method, which comprises the following steps:
acquiring a signal received by a GPS antenna and a Beidou short message signal transmitted by a Beidou short message antenna;
calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna;
carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals
The embodiment of the invention provides a Beidou short message anti-interference device, which comprises:
the acquisition module is used for acquiring a signal received by the GPS antenna and a Beidou short message signal transmitted by the Beidou short message antenna;
the calculation module is used for calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna;
and the compensation module is used for carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals.
A computer device comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the Beidou short message anti-interference method is realized when the processor executes the computer program.
A computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the Beidou short message anti-jamming method is realized.
The invention provides a Beidou short message anti-interference method, a Beidou short message anti-interference device, computer equipment and a storage medium, wherein a signal received by a GPS antenna and a Beidou short message signal transmitted by a Beidou short message antenna are acquired; calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna; and carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals. Therefore, the short message signals received by the GPS antenna can be aligned with the signals transmitted by the short message antenna, and the short message interference in the GPS antenna signals can be further suppressed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a flow chart of an anti-interference method for Beidou short messages in one embodiment of the present invention;
FIG. 2 is a schematic block diagram of a Beidou short message anti-jamming device in one embodiment of the present invention;
FIG. 3 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, an embodiment of the present invention provides a beidou short message anti-interference method, where the beidou short message anti-interference method includes the following steps:
and S10, acquiring the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna.
In the embodiment of the invention, the airborne GPS antenna and the airborne Beidou short message antenna are both arranged on the back of the machine body, and the distance between the airborne GPS antenna and the airborne Beidou short message antenna exceeds 15 m. Wherein the signal received by the GPS antenna is represented as:
w2(n)＝u(n)+βv(n-τ)+e(n)
the Beidou short message signal transmitted by the Beidou short message antenna is expressed as follows:
w1(n)＝v(n)
wherein n represents a signal serial number in discrete digital signal processing, v (n) is a Beidou short message signal, u (n) is a GPS navigation satellite signal, beta is an amplitude attenuation factor, tau is time delay, and e (n) comprises noise and a satellite signal with a pitch angle smaller than 10 degrees. If a satellite with an excessively small pitch angle is selected, the dop value is excessively small, and the positioning accuracy becomes low, so that a satellite with a pitch angle smaller than 10 degrees is generally not selected.
And S20, calculating the compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna.
Because the Beidou short message signal transmitted by the Beidou short message can be obtained by Beidou short message equipment information, the time delay estimated value can be obtained by adopting a generalized cross-correlation method
Obtaining an estimate of the time delay
And then, delay compensation can be carried out on the signals transmitted by the Beidou short message antenna. I.e. based on said time delay estimate
Carrying out delay time compensation on the Beidou short message signals transmitted by the Beidou short message antenna, wherein the Beidou short message signals after the delay time compensation are as follows:
due to signal propagation loss, the amplitude of the signal transmitted by the Beidou short message antenna is different from that of the signal received by the GPS antenna, so that an amplitude attenuation factor estimation value needs to be calculated according to the Beidou short message signal after delay time compensation and the signal received by the GPS antenna
Specifically, the amplitude attenuation factor estimation value
Obtained by solving the following least squares problem:
order:
w2＝[w2(0),w2(1)，…,w2(N-1)]T
the above equation can be expressed as:
solving the least square problem of the above formula to obtain an amplitude attenuation factor estimation value as follows:
s30, carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the Beidou short message interference resistant GPS signals.
After the estimated values of the time delay and the amplitude attenuation factor are obtained, time delay compensation and amplitude compensation can be carried out on the signals received by the Beidou short message antenna, then short message signal interference is eliminated from the signals received by the GPS antenna, and meanwhile useful GPS satellite signals are reserved, so that the purpose of suppressing the interference of airborne Beidou short message equipment is achieved. And performing cancellation interference suppression on signals received by the GPS antenna, wherein the suppressed signals are as follows:
wherein the content of the first and second substances,
to cancel the residual noise after cancellation.
According to the embodiment of the invention, the Beidou short message signals received by the GPS antenna can be cancelled, so that the interference of airborne Beidou short message receiving and transmitting equipment on an airborne GPS receiver is suppressed. When the Beidou short message signals received by the GPS antenna are inhibited, useful GPS navigation satellite signals can be reserved. And when the Beidou short message signals received by the GPS antenna are suppressed, the trailing of interference signals under noise can be eliminated. The embodiment of the invention can be applied to various global navigation satellite systems.
The invention provides a Beidou short message anti-interference method, which comprises the steps of obtaining a signal received by a GPS antenna and a Beidou short message signal transmitted by a Beidou short message antenna; calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna; and carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals. Therefore, the short message signals received by the GPS antenna can be aligned with the signals transmitted by the short message antenna, and the short message interference in the GPS antenna signals can be further suppressed.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In an embodiment, a Beidou short message anti-jamming device is provided, and the Beidou short message anti-jamming device corresponds to the Beidou short message anti-jamming method in the embodiment one to one. As shown in fig. 2, the big dipper short message anti-jamming device includes: the device comprises an acquisition module 10, a calculation module 20 and a compensation module 30. The functional modules are explained in detail as follows:
the acquisition module 10 is used for acquiring a signal received by the GPS antenna and a beidou short message signal transmitted by the beidou short message antenna;
the calculation module 20 is configured to calculate a compensated Beidou short message antenna-transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna;
and the compensation module 30 is used for carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the Beidou short message interference resistant GPS signals.
Specifically, the signal received by the GPS antenna is represented as:
w2(n)＝u(n)+βv(n-τ)+e(n)
the Beidou short message signal transmitted by the Beidou short message antenna is expressed as follows:
w1(n)＝v(n)
wherein, v (n) is a Beidou short message signal, u (n) is a GPS navigation satellite signal, beta is an amplitude attenuation factor, tau is time delay, and e (n) comprises noise and a satellite signal with a pitch angle smaller than 10 degrees.
The obtaining module 10 is further configured to obtain an estimated time delay value
Based on the time delay estimate
Carrying out delay time compensation on the Beidou short message signals transmitted by the Beidou short message antenna, wherein the Beidou short message signals after the delay time compensation are as follows:
the calculating module 20 is further configured to calculate an amplitude attenuation factor estimation value according to the delay time compensated beidou short message signal and the signal received by the GPS antenna
Specifically, the compensated signals transmitted by the big dipper short message antenna are as follows:
the GPS signal resisting the Beidou short message interference is as follows:
wherein the content of the first and second substances,
to cancel the residual noise after cancellation.
Specifically, the amplitude attenuation factor estimation value
Obtained by solving the following least squares problem:
order:
w2＝[w2(0),w2(1)，…,w2(N-1)]T
the above equation can be expressed as:
solving the least square problem of the above formula to obtain an amplitude attenuation factor estimation value as follows:
in one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 3. The computer apparatus includes a processor, a memory, a network interface, and a database connected by a device bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The nonvolatile storage medium stores an operating device, a computer program, and a database. The internal memory provides an environment for the operation device in the nonvolatile storage medium and the execution of the computer program. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by the processor to realize the Beidou short message anti-interference method.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring a signal received by a GPS antenna and a Beidou short message signal transmitted by a Beidou short message antenna;
calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna;
and carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring a signal received by a GPS antenna and a Beidou short message signal transmitted by a Beidou short message antenna;
calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna;
and carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An anti-interference method for Beidou short messages is characterized by comprising the following steps:
acquiring a signal received by a GPS antenna and a Beidou short message signal transmitted by a Beidou short message antenna;
calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna;
and carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals.
2. The beidou short message anti-jamming method according to claim 1, wherein the signals received by the GPS antenna are represented as:
w2(n)＝u(n)+βv(n-τ)+e(n)
the Beidou short message signal transmitted by the Beidou short message antenna is expressed as follows:
w1(n)＝v(n)
wherein, v (n) is a Beidou short message signal, u (n) is a GPS navigation satellite signal, beta is an amplitude attenuation factor, tau is time delay, and e (n) comprises noise and a satellite signal with a pitch angle smaller than 10 degrees.
3. The Beidou short message anti-interference method according to claim 2, further comprising:
obtaining a time delay estimate
Based on the time delay estimate
Carrying out delay time compensation on the Beidou short message signals transmitted by the Beidou short message antenna, wherein the Beidou short message signals after the delay time compensation are as follows:
4. the Beidou short message anti-interference method according to claim 3, further comprising:
calculating an amplitude attenuation factor estimation value according to the Beidou short message signal after the delay time compensation and the signal received by the GPS antenna
5. The Beidou short message anti-interference method according to claim 4, characterized in that the compensated Beidou short message antenna transmits signals of:
the GPS signal resisting the Beidou short message interference is as follows:
wherein the content of the first and second substances,
to cancel the residual noise after cancellation.
6. The Beidou short message anti-interference method according to claim 4, characterized in that the amplitude attenuation factor estimation value
Obtained by solving the following least squares problem:
order:
w2＝[w2(0),w2(1)，…,w2(N-1)]T
the above equation can be expressed as:
solving the least square problem of the above formula to obtain an amplitude attenuation factor estimation value as follows:
7. the utility model provides a big dipper short message anti jamming unit which characterized in that, the device includes:
the acquisition module is used for acquiring a signal received by the GPS antenna and a Beidou short message signal transmitted by the Beidou short message antenna;
the calculation module is used for calculating a compensated Beidou short message antenna transmitted signal according to the signal received by the GPS antenna and the Beidou short message signal transmitted by the Beidou short message antenna;
and the compensation module is used for carrying out Beidou short message interference suppression on the signals received by the GPS antenna through the compensated signals transmitted by the Beidou short message antenna to obtain the anti-Beidou short message interference GPS signals.
8. The beidou short message anti-jamming device of claim 7, wherein the signals received by the GPS antenna are represented as:
w2(n)＝u(n)+βv(n-τ)+e(n)
the Beidou short message signal transmitted by the Beidou short message antenna is expressed as follows:
w1(n)＝v(n)
wherein, v (n) is a Beidou short message signal, u (n) is a GPS navigation satellite signal, beta is an amplitude attenuation factor, tau is time delay, and e (n) comprises noise and a satellite signal with a pitch angle smaller than 10 degrees.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the beidou short message anti-jamming method according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, which stores a computer program, wherein the computer program, when executed by a processor, implements the beidou short message anti-jamming method according to any one of claims 1 to 6.
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