CN116027360A - Beidou broadband interference resistant identification system - Google Patents
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Abstract
The invention discloses a Beidou broadband interference resistant identification system, which relates to the technical field of electric Beidou systems and comprises a Beidou satellite signal interference source and deception signal simulation module, a Beidou satellite signal interference and deception signal acquisition and analysis module and a Beidou satellite signal interference resistance and deception technology application module, wherein the Beidou satellite signal interference source and deception signal simulation module is used for generating various GNSS interference and deception signals, the deception signals and air interface signals are mutually mixed, and the air interface signals refer to radio signals of various protocols; the invention not only processes and ensures the normal operation of various Beidou terminal equipment in time when abnormality is found, but also provides necessary basis for the research of anti-interference and anti-deception technologies of the terminal for long-term tracking research of interference signals and deception signals, effectively provides technical guarantee for more highly reliable terminal development and Beidou technology application schemes, and ensures the reliability and stability of the terminal in the application process.
Description
Technical Field
The invention relates to the technology of an electric Beidou system, in particular to a Beidou broadband interference resistant identification system.
Background
The electric power system is a national key infrastructure, the electric power safety relationship national life is an important guarantee of national safety, is closely related to various fields of economic safety, network safety and social safety, and because the environment of electric power operation is complex and wide in range, terminal equipment relying on Beidou satellite positioning or time service function operation faces more uncontrollable factors, navigation satellite interference signals and deception signals aiming at the influence operation of anti-unauthorised equipment possibly exist in an operation area, so that the terminal equipment cannot work normally and is harmful, for example, a distributed fault positioning terminal of a power transmission line relying on satellite high-precision time service is out of action, and a fully-autonomous inspection unmanned aerial vehicle cannot accurately position and fly into a forbidden area to bring secondary harm, thereby affecting the application of Beidou in electric power production operation;
the method comprises the steps of analyzing, identifying and stripping interference signals and deception signals in electric Beidou satellite signals in the whole province range until finally achieving the purposes of anti-interference and deception prevention, ensuring the reliability of electric Beidou system application near an electric network airspace, ensuring the accuracy of electric Beidou time service and the safety application of positioning type equipment of an electric patrol unmanned aerial vehicle, timely grasping the state of navigation satellite signals in each area, enhancing the identification and monitoring of the interference signals and deception signals, achieving signal source positioning, timely processing when abnormal conditions are found, guaranteeing the normal work of various Beidou terminal equipment, providing necessary basis for the research of anti-interference and deception technologies of terminals through long-term tracking research of the interference signals and deception signals, providing technical guarantee for developing more highly reliable terminals and Beidou technology application schemes, and ensuring the reliability and stability of the terminals in the application process.
Disclosure of Invention
The invention aims to provide a Beidou broadband interference resistant identification system so as to solve the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions: the Beidou broadband interference resisting identification system comprises a Beidou satellite signal interference source and deception signal simulation module, a Beidou satellite signal interference and deception signal acquisition and analysis module and a Beidou satellite signal interference resisting and deception technology application module;
the system comprises a Beidou satellite signal interference source, a deception signal simulation module, a Beidou satellite signal simulation module, a deception signal simulation module, a Beidou satellite signal simulation module and a positioning module, wherein the Beidou satellite signal interference source and the deception signal simulation module are used for generating various GNSS interference and deception signals, the deception signals and the air interface signals are mixed with each other, the air interface signals refer to radio signals of various protocols, and simulate simulated operation scenes with the deception signals, so that anti-interference and deception performance of operation equipment are evaluated, test and verification processing is carried out, pseudosatellite signals (deception signals) and interference signals are generated in a laboratory scene, wrong time and position signals are flexibly constructed, deception and interference to a Beidou receiver are realized, time and positioning functions of the Beidou receiver (terminal equipment) are influenced, the intensity, frequency range and mode parameters of the deception signals are controlled through the Beidou satellite signal interference source and the deception signal simulation module, application interference to electric Beidou terminal equipment such as autonomous flight of an inspection unmanned aerial vehicle is influenced, anti-interference and deception simulation is carried out on different terminal equipment through establishing Beidou satellite positioning technology research environments;
the Beidou satellite signal interference and deception signal acquisition and analysis module is a main monitoring module of the GNSS system and is used for monitoring and analyzing the distributed GNSS signals built in each important substation in real time, and the acquisition and analysis module acquires the GNSS satellite signals in real time and performs signal processing and signal analysis processing;
the Beidou satellite signal anti-interference and anti-deception technology application module is a main application module on a platform, evaluates the influence range and the result of abnormal signals, establishes a Beidou signal anti-deception and anti-interference defense system, determines interference time, range, deception mode and means, positions interference and deception signal sources, timely discovers the occurrence of the abnormal signals and provides early warning treatment for unmanned aerial vehicle inspection service, and the Beidou satellite signal anti-interference and anti-deception technology application module is mutually matched with an electric Beidou positioning service technology supervision platform, monitors Beidou satellite navigation signals of a monitoring area in real time, simultaneously automatically monitors the interference sources and deception signal sources, and realizes active monitoring of the state of the Beidou satellite signals in province.
Further, the Beidou satellite signal interference source and deception signal simulation module comprises a signal generator, simulation control software, a radio frequency split-combination conditioner, a radio frequency measurer, a tested terminal and a pair-sky signal device, wherein the signal generator is used for detecting and displaying frequency, waveform and electric parameters of an output level electric signal when a satellite signal is transmitted;
the simulation control software consists of a synchronous test control center and a plurality of synchronous phase control simulation devices, and steady-state three-phase alternating current, voltage, frequency and phase angle signals output by the synchronous phase control simulation devices are controlled by the synchronous test control center, so that the wide-area satellite signals are dynamically monitored in real time and controlled;
the radio frequency split-combination conditioning and radio frequency measurer comprises radio frequency signal split-combination equipment, and the radio frequency signal split-combination equipment is used for conditioning and measuring the frequency of satellite signals;
the tested terminal comprises a GNSS receiver, and is used for detecting and primarily judging abnormal Beidou satellite signals through the GNSS receiver, actively collecting the abnormal signals when the Beidou satellite signals are abnormal, and sending data to the Beidou satellite signal interference identification and deception prevention platform;
the antenna annunciator comprises a signal acquisition and analysis module, the signal acquisition and analysis module is used for accurately analyzing abnormal signals, whether satellite navigation signals at an acquisition point have interference and deception signal characteristics is judged, identification of interference signals or deception signals is achieved, broadband interference is carried out through calculation of actual interference signal level values, and the calculation formula of the actual interference signal level values is as follows: i=p I +L I +G I +G R -L R -L sd XPD+K, where I is the interference signal power at the input of the microwave receiver in dBm, P I To interfere with the signal power at the transmitter output in dBm, G I Antenna gain in interference station direction for satellite earth station antenna, unit is dBi, G R For the antenna gain of the microwave antenna in the direction of the interfered source, the unit is dBi, L R For the loss of the receiving end feeder system, the unit is dB, L I For the loss of the feeder system of the transmitting end of the interference station, the unit is dB, L sd For path transmission loss, in dB, XPD is cross-polarization decoupling, in dB (since the effect is not much omitted), K is a wide correction factor,
。
further, the Beidou satellite signal interference and deception signal acquisition and analysis module is composed of a distributed GNSS anti-interference deception detection device and GNSS interference identification and deception analysis software embedded in a satellite signal interference identification and terminal deception prevention platform, the GNSS anti-interference deception detection device adopts an electric anti-interference deception satellite time service module, the electric anti-interference deception satellite time service module supports a time service function and an abnormal signal monitoring function, can operate under interference and deception signal scenes, gives abnormal alarm indication to interference signals and deception signals, performs early warning processing of the interference signals through calculation of interference signal allowable values, and the interference signal allowable value calculation is evaluated by adopting the following formula:
any month is more than 20%, the interference signal level allowable value is: i0 =10 IgTR-176.6 (any 4kHz bandwidth);
2. the interference signal level allowed value is any month 0.01% or more: i0 =l0 IgTR-159.6 (any 4kHz bandwidth), where I0 is the allowed value of the interference signal at the input of the microwave receiver, the unit is dBwT, TR is the noise temperature of the microwave receiver, the unit is K, and for the noise temperature TR, the following calculation formula can be used: tr= (F-1) ×290, where F is the noise figure of the microwave receiver;
the allowable value (interference tolerance value) of the interference signal is estimated by a threshold degradation amount, the threshold level is the level of the received signal which just meets the outage probability index, the allowable value of the maximum interference signal is given by a method for describing the threshold degradation, and the calculation formula of the allowable value of the maximum interference signal is as follows: i0 =rth-10+se, where I0 is the maximum interference signal allowed value, in dBm, rth is the interfered microwave receiver threshold level value, in dBm, se is the interfered microwave receiver effective selectivity, in dB, and when the interference exceeds the bottom noise by 10-18 dB, an interference early warning is sent, and when the interference exceeds the bottom noise by 20dB, an interference warning is sent;
the GNSS anti-interference anti-deception detection device comprises an active antenna, a GNSS anti-interference anti-deception module and GNSS protection pre-processing software;
the GNSS protection pre-processing software runs in the GNSS anti-interference anti-deception detection device to drive the GNSS anti-interference anti-deception module and send acquisition data through the interface, and the GNSS protection pre-processing software controls the GNSS anti-interference anti-deception detection device to acquire and process original GNSS signals;
the active antenna is used for receiving signals of the GNSS and sending the signals to the GNSS anti-interference and anti-deception module;
the GNSS anti-interference and anti-deception module is used for detecting GNSS satellite signals in real time, preliminarily judging whether interference and deception exist in the GNSS satellite signals, and sending an event information report to GNSS pre-processing software for processing when suspicious abnormality occurs to data;
the GNSS interference recognition and deception analysis software runs in core signal processing software in a platform, performs joint signal analysis on original GNSS signals acquired at the site side when the original GNSS signals are combined, frequency and space domain multidimensional information, extracts depth characteristics of the signals, performs qualitative and quantitative analysis on the interference and deception signals, gives out detection results, and generally contains C/A codes and P codes, and because the P codes are used for military use and are not disclosed externally, the C/A codes in a civil range are used as research objects, and mathematical forms of the C/A codes are expressed as follows: s is S r =AC(n)D(n)cos(2πnf+φ r ) +w (n), where A represents the amplitude of the signal, C (n) is the C/A code, D (n) is the navigation message, f is the carrier frequency, φ r For carrier phase, w (n) is Gaussian white noise, and in order to realize interference to a receiver, a spoofing signal needs to ensure that the carrier frequency is consistent with a satellite signal, and the expression only considers the situation of a single satellite;
determining the position of the user by calculating the pseudo-range between the user and each satellite, if the satellite signal sending time is t s The signal is received by the receiver at time t u Neglecting the clock difference, the pseudo-range calculation formula is as follows: p is p r =c(t u -t s ) Wherein c represents the speed of light;
when the receiver regards the rogue signal as a correct signal, if the rogue signal has a delay τ with respect to the satellite signal, the computed pseudorange is expressed as: p is p s =c(t u -t s ) +cτ, detecting in real time whether a fraud signal is present in the received signal, and closing when the fraud signal is presentThe signals are output to realize deception signal isolation and simultaneously deception alarms are sent out.
Further, the Beidou satellite signal anti-interference and anti-deception technology application module comprises an interference and deception feature database, a historical data statistics module, an interference deception source positioning module, a real-time data processing module and a prediction and early warning issuing module;
the real-time data processing module is used for analyzing and sorting the real-time data information received by the GNCC interference recognition and deception analysis software, and respectively transmitting the data information after analysis and sorting to the interference and deception feature database, the interference deception source positioning and prediction and early warning issuing module;
the interference and deception feature database is used for storing the data of the interference time, the interference range, deception modes and means, and sending the data information of the database to the historical data statistics module and the prediction and early warning release module;
the historical data statistics module is used for carrying out unified statistics processing on the received interference data and the deception data before, and sending the statistical data information to the prediction and early warning release module;
the interference deception source positioning is used for carrying out rapid positioning processing on the received interference and deception signal sources and sending source positioning data information to the prediction and early warning release module;
the prediction and early warning release module is used for timely finding out the occurrence of abnormal signals and providing early warning processing for unmanned aerial vehicle inspection business.
Further, the output end of the signal transmitter is connected with the input end of the radio frequency split-combination conditioning and radio frequency measurer, the radio frequency split-combination conditioning and radio frequency measurer is in bidirectional connection with the simulation control software, the simulation control software is in bidirectional connection with the signal generator, the output end of the radio frequency split-combination conditioning and radio frequency measurer is connected with the input end of the tested terminal, the output end of the tested terminal is connected with the input end of the simulation control software, and the output end of the antenna signal generator is connected with the input end of the radio frequency split-combination conditioning and radio frequency measurer.
Further, the output end of the active antenna is connected with the input end of the GNSS anti-interference anti-deception module, the GNSS anti-interference anti-deception module is connected with the GNSS protection pre-processing software in a bidirectional manner, the GNSS protection pre-processing software is connected with the GNSS interference recognition and deception analysis software in a bidirectional manner, when no deception signal exists in the active antenna, two radio frequency switches in the GNSS anti-interference anti-deception detection device are closed, the Beidou and GPS active antenna receiving signals are directly sent to the subordinate device, the subordinate device receives satellite signals and is in a satellite time service working state, when one antenna (Beidou or GPS) has deception signals, the GNSS anti-interference anti-deception detection device turns off the radio frequency switch with a deception signal channel, a synchronous clock selects logic according to satellite signals, when the other satellite signals without deception signals are selected, and when the deception signals exist in the two antennas at the same time, the two radio frequency switches in the isolation gateway are simultaneously turned off, and the GNSS anti-interference anti-deception detection device only sends the receiving signals without deception signals to the subordinate device, even if the subordinate device has no deception ability, the subordinate device has no deception ability.
Further, the output end of the GNSS interference recognition and deception analysis software is connected with the input end of the real-time data processing module, the output end of the real-time data processing module is respectively connected with the input end of the interference and deception feature database, the interference deception source positioning and the prediction and early warning issuing module, the output end of the interference deception source positioning is connected with the input end of the interference and deception feature database, the output end of the interference and deception feature database is connected with the input end of the historical data statistics module, and the output end of the historical data statistics module is connected with the input end of the prediction and early warning issuing module.
Compared with the prior art, the Beidou broadband interference resistant identification system provided by the invention ensures the accuracy of electric Beidou time service and the safe application of the positioning type equipment of the electric power inspection unmanned aerial vehicle by ensuring the reliability of the application of the electric power Beidou system near the airspace of the electric power grid, simultaneously develops an electric power Beidou satellite interference and deception signal source monitoring platform to timely master the signal states of navigation satellites in all areas, strengthens the identification and monitoring of interference signals and deception signals and realizes the signal source positioning, so that the invention not only timely processes and ensures the normal work of various Beidou terminal equipment when finding abnormality, but also provides necessary basis for the research of terminal interference resistance and deception technology by long-term tracking research of the interference signals and deception signals, effectively provides technical guarantee for more highly reliable terminal development and technology application schemes, and ensures the reliability and stability of the terminal in the application process.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is an overall system block diagram of a beidou satellite signal interference source and a spoofing signal simulation module of a beidou broadband interference resistant identification system provided by an embodiment of the invention;
fig. 2 is an overall system block diagram of a beidou satellite signal interference and spoofing signal acquisition and analysis module of a beidou broadband interference resistant identification system provided by an embodiment of the invention;
fig. 3 is an overall system block diagram of a beidou satellite signal anti-interference and anti-spoofing technology application module of a beidou broadband anti-interference identification system provided by an embodiment of the invention;
fig. 4 is a schematic diagram of internal components and an access mode of a GNSS anti-interference anti-fraud detection apparatus of a beidou anti-broadband interference identification system according to an embodiment of the present invention.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
Examples
Referring to fig. 1-4, a beidou broadband interference resisting identification system comprises a beidou satellite signal interference source and deception signal simulation module, a beidou satellite signal interference and deception signal acquisition and analysis module and a beidou satellite signal interference resisting and deception resisting technology application module;
the system comprises a Beidou satellite signal interference source and a deception signal simulation module, a Beidou satellite signal interference source and deception signal simulation module, a Beidou satellite signal simulation module and a Beidou satellite signal simulation module, wherein the Beidou satellite signal interference source and deception signal simulation module is used for generating various GNSS interference and deception signals, the deception signals and air interface signals are mixed with each other, the air interface signals refer to radio signals of various protocols, simulated operation scenes with the deception signals are simulated, so that anti-interference and deception performance of operation equipment are evaluated, test and verification processing are carried out, a pseudosatellite signal (deception signal) and an interference signal are generated in a laboratory scene, wrong time and position signals are flexibly constructed, deception and interference of a Beidou receiver are realized, time service and positioning functions of the Beidou receiver (terminal equipment) are influenced, application interference to power terminal equipment is realized, such as autonomous flight of a Beidou satellite positioning unmanned aerial vehicle is influenced, anti-interference and deception technology research environments are established, and hidden hazards of various Beidou service terminals are mastered under the abnormal conditions of the Beidou satellite signals;
the Beidou satellite signal interference and deception signal acquisition and analysis module is a main monitoring module of the GNSS system and is used for monitoring and analyzing the distributed GNSS signals built in each important substation in real time, and the acquisition and analysis module acquires the GNSS satellite signals in real time and performs signal processing and signal analysis processing;
the Beidou satellite signal anti-interference and anti-deception technology application module is a main application module on a platform, evaluates the influence range and the result of abnormal signals, establishes a Beidou signal anti-deception and anti-interference defense system, determines interference time, range, deception mode and means, positions an interference and deception signal source, timely discovers the occurrence of the abnormal signals and provides early warning processing for unmanned aerial vehicle inspection service, and the Beidou satellite signal anti-interference and anti-deception technology application module is mutually matched with an electric Beidou positioning service technology supervision platform.
In the invention, the Beidou satellite signal interference source and deception signal simulation module comprises a signal generator, simulation control software, radio frequency split-combination conditioning, a radio frequency measurer, a tested terminal and a pair-sky signal device;
the signal generator is used for detecting and displaying the frequency, waveform and electric parameters of the output level electric signal when the satellite signal is transmitted;
the simulation control software consists of a synchronous test control center and a plurality of synchronous phase control simulation devices, and the synchronous test control center controls steady-state three-phase alternating current, voltage, frequency and phase angle signals output by the synchronous phase control simulation devices to realize the real-time dynamic monitoring and control of wide-area satellite signals;
the radio frequency splitting and combining conditioning and radio frequency measurer comprises radio frequency signal splitting and combining equipment, and the frequency of the satellite signal is conditioned and measured through the radio frequency signal splitting and combining equipment;
the tested terminal comprises a GNSS receiver, and is used for detecting and primarily judging abnormal Beidou satellite signals through the GNSS receiver, actively collecting the abnormal signals when the Beidou satellite signals are abnormal and sending data to the Beidou satellite signal interference identification and deception prevention platform;
the antenna signal device comprises a signal acquisition and analysis module, the abnormal signal is accurately analyzed through the signal acquisition and analysis module, whether the satellite navigation signal at the acquisition point has the characteristics of interference and deception signals or not is judged, the identification of the interference signal or deception signal is realized, the broadband interference condition is carried out through the calculation of the actual interference signal level value, and the calculation formula of the actual interference signal level value is as follows: i=p I +L I +G I +G R -L R -L sd XPD+K, where I is the interference signal power at the input of the microwave receiver in dBm, P I To interfere with the signal power at the transmitter output in dBm, G I Antenna gain in interference station direction for satellite earth station antenna, unit is dBi, G R For the antenna gain of the microwave antenna in the direction of the interfered source, a singleBit is dBi, L R For the loss of the receiving end feeder system, the unit is dB, L I For the loss of the feeder system of the transmitting end of the interference station, the unit is dB, L sd For path transmission loss, in dB, XPD is cross-polarization decoupling, in dB (since the effect is not much omitted), K is a wide correction factor,
。
according to the invention, the Beidou satellite signal interference and deception signal acquisition and analysis module consists of a distributed GNSS anti-interference deception detection device and GNSS interference identification and deception analysis software embedded in a satellite signal interference identification and terminal deception prevention platform, the GNSS anti-interference deception detection device adopts an electric anti-interference deception satellite time service module, the electric anti-interference deception satellite time service module supports a time service function and an abnormal signal monitoring function, can operate under interference and deception signal scenes, gives abnormal alarm indication to interference signals and deception signals, performs early warning processing of the interference signals through calculation of interference signal allowable values, and the interference signal allowable value calculation is evaluated by adopting the following formula:
1. any month is more than 20%, the interference signal level allowable value is: i0 =l0 IgTR-176.6 (any 4kHz bandwidth);
2. the interference signal level allowed value is any month 0.01% or more: i0 =l0 IgTR-159.6 (any 4kHz bandwidth), where I0 is the allowed value of the interference signal at the input of the microwave receiver, the unit is dBwT, TR is the noise temperature of the microwave receiver, the unit is K, and for the noise temperature TR, the following calculation formula can be used: tr= (F-1) ×290, where F is the noise figure of the microwave receiver;
the allowable value (interference tolerance value) of the interference signal is estimated by a threshold degradation amount, the threshold level is the level of the received signal which just meets the outage probability index, the allowable value of the maximum interference signal is given by a method for describing the threshold degradation, and the calculation formula of the allowable value of the maximum interference signal is as follows: i0 =rth-10+se, where I0 is the maximum interference signal allowed value, in dBm, rth is the interfered microwave receiver threshold level value, in dBm, se is the interfered microwave receiver effective selectivity, in dB, and when the interference exceeds the bottom noise by 10-18 dB, an interference early warning is sent, and when the interference exceeds the bottom noise by 20dB, an interference warning is sent;
the GNSS anti-interference anti-deception detection device comprises an active antenna, a GNSS anti-interference anti-deception module and GNSS protection pre-processing software;
the GNSS protection pre-processing software runs in the GNSS anti-interference anti-deception detection device, realizes the driving of the GNSS anti-interference anti-deception module, and sends acquired data through an interface, and the GNSS protection pre-processing software controls the GNSS anti-interference anti-deception detection device to acquire and process original GNSS signals;
the active antenna is used for receiving signals of the GNSS and sending the signals to the GNSS anti-interference and anti-deception module;
the GNSS anti-interference and anti-deception module is used for detecting GNSS satellite signals in real time, preliminarily judging whether interference and deception exist in the GNSS satellite signals, and sending an event information report to GNSS pre-processing software for processing when suspicious abnormality occurs to the data;
the GNSS interference recognition and deception analysis software runs in core signal processing software in the platform, performs joint signal analysis on original GNSS signals acquired at the site side when the original GNSS signals are combined, frequency and airspace multidimensional information, extracts depth characteristics of the signals, performs qualitative and quantitative analysis on the interference and deception signals, gives out detection results, and generally contains C/A codes and P codes, and because the P codes are used as military use and are not disclosed externally, the C/A codes in the civil range are used as research objects, and the mathematical form of the C/A codes is expressed as follows: s is S r =AC(n)D(n)cos(2πnf+φ r ) +w (n), where A represents the amplitude of the signal, C (n) is the C/A code, D (n) is the navigation message, f is the carrier frequency, φ r For carrier phase, w (n) is Gaussian white noise, and in order to realize interference to a receiver, a spoofing signal needs to ensure that the carrier frequency is consistent with a satellite signal, and the expression only considers the situation of a single satellite;
determining the position of the user by calculating the pseudo-range between the user and each satellite, if the satellite signal sending time is t s The signal isThe receiving time of the receiver is t u Neglecting the clock difference, the pseudo-range calculation formula is as follows: p is p r =c(t u -t s ) Wherein c represents the speed of light;
when the receiver regards the rogue signal as a correct signal, if the rogue signal has a delay τ with respect to the satellite signal, the computed pseudorange is expressed as: p is p s =c(t u -t s ) +cτ, detecting whether a spoofing signal exists in the received signal in real time, and when the spoofing signal exists, closing the output signal to realize spoofing signal isolation and simultaneously sending a spoofing alarm.
In the invention, the Beidou satellite signal anti-interference and anti-deception technology application module comprises an interference and deception feature database, a historical data statistics module, an interference deception source positioning, a real-time data processing module and a prediction and early warning issuing module;
the real-time data processing module is used for analyzing and sorting the real-time data information received by the GNCC interference recognition and deception analysis software, and respectively transmitting the data information after analysis and sorting to the interference and deception feature database, the interference deception source positioning and prediction and early warning issuing module;
the interference and deception feature database is used for storing the data of the interference time, the interference range, deception modes and means, and sending the data information of the database to the historical data statistics module and the prediction and early warning release module;
the historical data statistics module is used for carrying out unified statistics processing on the received interference data and the deception data before, and sending the statistical data information to the prediction and early warning release module;
the interference deception source positioning is used for carrying out rapid positioning processing on the received interference and deception signal sources, and in the invention, the Beidou satellite signals send source positioning data information to the prediction and early warning release module;
the prediction and early warning release module is used for timely finding out the occurrence of abnormal signals and providing early warning processing for unmanned aerial vehicle inspection business.
In the invention, the output end of the signal transmitter is connected with the input end of the radio frequency split-combination conditioning and radio frequency measurer, the radio frequency split-combination conditioning and radio frequency measurer is connected with the simulation control software in a two-way, the simulation control software is connected with the signal generator in a two-way, the output end of the radio frequency split-combination conditioning and radio frequency measurer is connected with the input end of the tested terminal, the output end of the tested terminal is connected with the input end of the simulation control software, and the output end of the antenna signal generator is connected with the input end of the radio frequency split-combination conditioning and radio frequency measurer.
According to the invention, the output end of the active antenna is connected with the input end of the GNSS anti-interference anti-deception module, the GNSS anti-interference anti-deception module is in bidirectional connection with the GNSS protection pre-processing software, the GNSS protection pre-processing software is in bidirectional connection with the GNSS interference identification and deception analysis software, when no deception signal exists in the active antenna, two radio frequency switches in the GNSS anti-interference anti-deception detection device are closed, the Beidou and GPS active antenna received signals are directly sent to the lower-level equipment, the lower-level equipment receives satellite signals and is in a satellite time service working state, when one antenna (Beidou or GPS) has deception signals, the GNSS anti-interference anti-deception detection device turns off the radio frequency switch with a deception signal channel, the synchronous clock is switched off according to satellite signal selection logic, when the other satellite signals without deception signals are selected, and when the deception signals exist in the two antennas at the same time, the two radio frequency switches in the isolation gateway are simultaneously turned off, and the GNSS anti-interference anti-deception detection device only sends the received signals without deception signals to the lower-level equipment even if the lower-level equipment has no deception ability.
In the invention, the output end of GNSS interference recognition and deception analysis software is connected with the input end of a real-time data processing module, the output end of the real-time data processing module is respectively connected with an interference and deception feature database, an interference deception source positioning and the input end of a prediction and early warning issuing module, the output end of the interference deception source positioning is connected with the input end of the interference and deception feature database, the output end of the interference and deception feature database is connected with the input end of a historical data statistics module, and the output end of the historical data statistics module is connected with the input end of the prediction and early warning issuing module.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (7)
1. The Beidou broadband interference resistant identification system is characterized by comprising a Beidou satellite signal interference source and deception signal simulation module, a Beidou satellite signal interference and deception signal acquisition and analysis module and a Beidou satellite signal interference resistant and deception technology application module;
the Beidou satellite signal interference source and deception signal simulation module is used for generating various GNSS interference and deception signals, the deception signals and air interface signals are mixed with each other, the air interface signals refer to radio signals of various protocols, and an operation scene with the deception signals is simulated and simulated, so that the anti-interference and anti-deception performance of operation equipment is evaluated, tested and verified;
the Beidou satellite signal interference and deception signal acquisition and analysis module is a main monitoring module of the GNSS system and is used for monitoring and analyzing the distributed GNSS signals built in each important substation in real time, and the acquisition and analysis module acquires the GNSS satellite signals in real time and performs signal processing and signal analysis processing;
the Beidou satellite signal anti-interference and anti-deception technology application module is a main application module on a platform, evaluates the influence range and the result of abnormal signals, establishes a Beidou signal anti-deception and anti-interference defense system, determines interference time, range, deception mode and means, positions interference and deception signal sources, timely discovers the occurrence of the abnormal signals and provides early warning treatment for unmanned aerial vehicle inspection service.
2. The Beidou broadband interference resistant identification system of claim 1, wherein the Beidou satellite signal interference source and deception signal simulation module comprises a signal generator, simulation control software, radio frequency split-combination conditioning and radio frequency measurer, a tested terminal and a pair-sky signal device;
the signal generator is used for detecting and displaying the frequency, waveform and electric parameters of the output level electric signal when the satellite signal is transmitted;
the simulation control software consists of a synchronous test control center and a plurality of synchronous phase control simulation devices, and steady-state three-phase alternating current, voltage, frequency and phase angle signals output by the synchronous phase control simulation devices are controlled by the synchronous test control center, so that the wide-area satellite signals are dynamically monitored in real time and controlled;
the radio frequency split-combination conditioning and radio frequency measurer comprises radio frequency signal split-combination equipment, and the radio frequency signal split-combination equipment is used for conditioning and measuring the frequency of satellite signals;
the tested terminal comprises a GNSS receiver, and is used for detecting and primarily judging abnormal Beidou satellite signals through the GNSS receiver, actively collecting the abnormal signals when the Beidou satellite signals are abnormal, and sending data to the Beidou satellite signal interference identification and deception prevention platform;
the antenna signal detector comprises a signal acquisition and analysis module, and the abnormal signal is accurately analyzed through the signal acquisition and analysis module, so that whether the satellite navigation signal at the acquisition point has interference and the characteristics of the deception signal or not are judged, and the identification of the interference signal or the deception signal is realized.
3. The Beidou broadband interference resistant identification system of claim 1, wherein the Beidou satellite signal interference and deception signal acquisition and analysis module consists of a distributed GNSS anti-interference deception detection device and GNSS interference identification and deception analysis software embedded in a satellite signal interference identification and terminal deception prevention platform, and the GNSS anti-interference deception detection device adopts an electric anti-interference deception satellite time service module;
the GNSS anti-interference anti-deception detection device comprises an active antenna, a GNSS anti-interference anti-deception module and GNSS protection pre-processing software;
the GNSS protection pre-processing software runs in the GNSS anti-interference anti-deception detection device, realizes the driving of the GNSS anti-interference anti-deception module, and sends acquired data through an interface;
the active antenna is used for receiving signals of the GNSS and sending the signals to the GNSS anti-interference and anti-deception module;
the GNSS anti-interference and anti-deception module is used for detecting GNSS satellite signals in real time, preliminarily judging whether interference and deception exist in the GNSS satellite signals, and sending an event information report to GNSS pre-processing software for processing when suspicious abnormality occurs to data;
the GNSS interference recognition and deception analysis software runs in core signal processing software in the platform, performs joint signal analysis on original GNSS signals acquired at the site side when the original GNSS signals are combined, frequency and airspace multidimensional information, extracts depth characteristics of the signals, performs qualitative and quantitative analysis on the interference and deception signals, and gives detection results.
4. The Beidou broadband interference resistant identification system of claim 3, wherein the Beidou satellite signal interference resistant and spoofing technology application module comprises an interference and spoofing feature database, a historical data statistics module, an interference spoofing source positioning module, a real-time data processing module and a prediction and early warning issuing module;
the real-time data processing module is used for analyzing and sorting the real-time data information received by the GNCC interference recognition and deception analysis software, and respectively transmitting the data information after analysis and sorting to the interference and deception feature database, the interference deception source positioning and prediction and early warning issuing module;
the interference and deception feature database is used for storing the data of the interference time, the interference range, deception modes and means, and sending the data information of the database to the historical data statistics module and the prediction and early warning release module;
the historical data statistics module is used for carrying out unified statistics processing on the received interference data and the deception data before, and sending the statistical data information to the prediction and early warning release module;
the interference deception source positioning is used for carrying out rapid positioning processing on the received interference and deception signal sources and sending source positioning data information to the prediction and early warning release module;
the prediction and early warning release module is used for timely finding out the occurrence of abnormal signals and providing early warning processing for unmanned aerial vehicle inspection business.
5. The Beidou broadband interference resistant identification system of claim 2, wherein an output end of the signal transmitter is connected with an input end of the radio frequency split-combination conditioning and radio frequency measurer, bidirectional connection is realized between the radio frequency split-combination conditioning and radio frequency measurer and simulation control software, bidirectional connection is realized between the simulation control software and the signal generator, an output end of the radio frequency split-combination conditioning and radio frequency measurer is connected with an input end of a tested terminal, an output end of the tested terminal is connected with an input end of the simulation control software, and an output end of the pair antenna signal generator is connected with an input end of the radio frequency split-combination conditioning and radio frequency measurer.
6. The Beidou broadband interference resistant identification system of claim 3, wherein an output end of the active antenna is connected with an input end of the GNSS anti-interference spoofing prevention module, the GNSS anti-interference spoofing prevention module is in bidirectional connection with GNSS protection pre-processing software, and the GNSS protection pre-processing software is in bidirectional connection with GNSS interference identification and spoofing analysis software.
7. The Beidou anti-broadband interference recognition system of claim 4, wherein an output end of the GNSS interference recognition and deception analysis software is connected with an input end of a real-time data processing module, an output end of the real-time data processing module is respectively connected with an input end of an interference and deception feature database, an interference deception source positioning and a prediction and early warning issuing module, an output end of the interference deception source positioning is connected with an input end of the interference and deception feature database, an output end of the interference and deception feature database is connected with an input end of a historical data statistics module, and an output end of the historical data statistics module is connected with an input end of the prediction and early warning issuing module.
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