CN109286464B - System for testing anti-active interference intermediate frequency signal processing performance of continuous wave frequency modulation detection - Google Patents
System for testing anti-active interference intermediate frequency signal processing performance of continuous wave frequency modulation detection Download PDFInfo
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- CN109286464B CN109286464B CN201710598303.1A CN201710598303A CN109286464B CN 109286464 B CN109286464 B CN 109286464B CN 201710598303 A CN201710598303 A CN 201710598303A CN 109286464 B CN109286464 B CN 109286464B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/65—Jamming involving special techniques using deceptive jamming or spoofing, e.g. transmission of false signals for premature triggering of RCIED, for forced connection or disconnection to/from a network or for generation of dummy target signal
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/38—Jamming means, e.g. producing false echoes
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Abstract
The invention discloses a system for testing the processing performance of an active interference resistant intermediate frequency signal by continuous wave frequency modulation detection. The system comprises: the continuous wave frequency modulation detector front-end module is used for transmitting a continuous wave frequency modulation detection signal and receiving an echo and outputting a target intermediate frequency signal after down-mixing; the active interference signal and front-end modulation signal synchronous simulation module generates an interference signal; the intermediate frequency signal synthesizer injects the generated interference signal into a target intermediate frequency signal to synthesize an interfered signal, and sends the interfered signal to the intermediate frequency signal processing module to be detected; the embedded real-time control module transmits the control command of the upper computer to other modules and transmits the test data to the upper computer; and the upper computer interaction module inputs system simulation parameters and sends the system simulation parameters to the control module, and simultaneously, the test data is analyzed. The invention can simulate diversified signal interference modes, can simulate narrow-band aiming type and wide-band blocking type interference signals at the same time, and is suitable for detectors of continuous wave frequency modulation systems of various frequency band frequency modulation modes.
Description
Technical Field
The invention relates to the technical field of system anti-interference performance testing, in particular to a system for testing the anti-active interference intermediate frequency signal processing performance of continuous wave frequency modulation detection.
Background
With the increasing modern interference technology, the performance of radio detectors is presented with serious challenges. As a detector type widely adopted by a continuous wave frequency modulation system, the research on the anti-interference performance of the continuous wave frequency modulation system has important significance. On the other hand, because the continuous wave frequency modulation system has the characteristic of large time-width bandwidth, especially the millimeter wave frequency band, the effective bandwidth can reach more than hundreds of megahertz, the interference resistance of the system is improved, and the difficulty of the simulation research on the interference of the real objects is increased. The newly developed fourth generation "shortstop" jammer in the united states has reached 40GHz operating frequency, i.e., the detector operating in the millimeter wave band will face the threat of being interfered, and therefore the research on the anti-interference technology related to the jammer is more and more important. The intermediate frequency signal processing is used as a core module of the detector for realizing the target identification and tracking functions, and has very important significance for testing and analyzing the anti-interference performance of the detector.
In the prior art, the chinese utility model patent with application number 201621015947.0 discloses an outboard active interference radio frequency source for simulating the complicated electromagnetic environment of the marine actual combat, it can simulate and generate multiple interference signal, but the coverage frequency band only has 8GHz ~ 18GHz to the radar signal form that is suitable for mainly is directed at the pulse system, can't be applied to the continuous wave frequency modulation system detector of millimeter wave band. Chinese utility model patent with application number 201610607551.3 discloses a data transmission system active disturbance dynamic simulation and interference confrontation ability test system, thereby it injects the interference signal who generates into behind the useful signal transmission and receives again and carries out data monitoring analysis evaluation system interference killing feature, though does not mention its cover frequency channel in the application content, but its mainly applied to communication system, can't be applicable to detecting system.
Disclosure of Invention
The invention aims to provide a continuous wave frequency modulation detection active interference resistant intermediate frequency signal processing performance test system, which avoids generating high-power signals in millimeter wave bands, and is suitable for continuous wave frequency modulation system detectors of various frequency bands in various frequency modulation modes.
The technical solution for realizing the purpose of the invention is as follows: the utility model provides an anti active interference intermediate frequency signal processing capability test system of continuous wave frequency modulation detection, includes continuous wave frequency modulation detector front end module, active interference signal and front end modulation signal synchronous analog module, intermediate frequency signal synthesizer, embedded real-time control module, host computer interaction module, wherein:
the continuous wave frequency modulation detector front end module is used for transmitting a continuous wave frequency modulation detection signal, receiving an echo at the same time, and outputting a target intermediate frequency signal after down-mixing;
the active interference signal and front-end modulation signal synchronous simulation module is used for generating various active deception and active suppression interference signals, and controlling the modulator and the DDS to synchronously generate modulation signals when suppressing interference is simulated;
the intermediate frequency signal synthesizer injects the interference signal generated by simulation into the echo signal of the detector, synthesizes the interfered signal and sends the signal to the intermediate frequency signal processing module to be detected;
the embedded real-time control module interacts with the upper computer interaction module in real time, controls other modules in real time according to the instruction of the upper computer interaction module to simulate interference signals of different parameter systems, and transmits test data of the intermediate frequency signal processing module to be tested to the upper computer interaction module;
and the upper computer interaction module is used for inputting system simulation parameters, sending the system simulation parameters to the control module and analyzing the anti-interference performance of the received test data.
Furthermore, the front-end module of the continuous wave frequency modulation detector comprises a transceiving antenna, a circulator, a mixer and a VCO; an input interface for providing VCO modulation signals is connected with a modulator in the active interference signal and front-end modulation signal synchronous analog module, and an output interface for providing intermediate frequency signals is connected with a signal synthesizer; the working frequency band of the front-end module of the continuous wave frequency modulation detector is not limited, and the frequency modulation mode is not limited.
Further, the active interference signal and front-end modulation signal synchronous analog module comprises a modulator, a direct frequency synthesizer, a clock synchronous controller, an analog multiplier, a power amplifier, a band-pass filter, a frequency doubling module, a high-speed digital-to-analog converter and an interference signal path selection switch.
Furthermore, the clock synchronization controller receives an instruction of the embedded real-time control module, and controls the modulator to generate a corresponding modulation signal and send the modulation signal to the front-end module of the continuous wave frequency modulation detector; and when the suppression type interference is simulated, synchronously controlling the direct frequency synthesizer to generate a corresponding modulated sweep frequency signal, and sending the modulated sweep frequency signal into the analog multiplier to simulate the process that the interference signal interacts with the emission signal of the detector.
Further, the direct frequency synthesizer directly simulates and generates a distance deception jamming intermediate frequency signal, a speed deception jamming intermediate frequency signal and a distance-speed joint deception jamming intermediate frequency signal; when the suppression type interference is generated in a simulation mode, the direct frequency synthesizer synchronously generates a frequency sweeping signal consistent with the parameters of the modulator according to the control command of the clock synchronization module.
Furthermore, the high-speed digital-to-analog converter outputs a white Gaussian noise signal under the control of the embedded real-time control module, and the white Gaussian noise signal passes through the frequency doubling module, the band-pass filter and the power amplifier and then is sent to the analog multiplier.
Furthermore, the embedded real-time control module controls the frequency doubling module, the band-pass filter and the power amplifier in real time to realize suppression type interference signals with different interference bandwidths and interference powers.
Furthermore, the analog multiplier is configured to modulate the noise amplitude modulation compression type interference or the noise frequency modulation compression type interference onto the frequency sweeping signal generated by the direct frequency synthesizer, so as to simulate a process of mixing the interference signal with the local oscillation signal after entering the detector receiver in practice.
Further, the interference signal path selection switch is used for selecting an interference type of the injected intermediate frequency signal, wherein the interference type is a deception interference intermediate frequency signal generated by the direct frequency synthesizer or a suppression interference intermediate frequency signal output by the analog multiplier.
Compared with the prior art, the invention has the remarkable advantages that: (1) the method can simulate diversified signal interference modes, including noise amplitude modulation pressing type interference, noise frequency modulation pressing type interference, distance deception type interference, speed deception type interference and distance-speed combined deception type interference, and can realize narrow-band aiming type and wide-band blocking type interference signals by controlling the simulation coefficient of the pressing type interference; (2) by adopting the medium-frequency injection technology and synchronously simulating the modulation signal at the front end of the detector at the outside, the difficulty of generating a high-power signal in a millimeter wave band is avoided, and the method is suitable for continuous wave frequency modulation system detectors of various frequency band frequency modulation modes.
Drawings
Fig. 1 is a schematic block diagram of a system for testing the anti-active-interference intermediate frequency signal processing performance of continuous wave frequency modulation detection according to the present invention.
FIG. 2 is a schematic diagram of the output signals of the clock synchronizer, the modulator and the direct frequency synthesizer in simulating the jamming signal.
Detailed Description
The invention provides a continuous wave frequency modulation detection active interference resistance intermediate frequency signal processing performance test system, which adopts an intermediate frequency injection type simulation technology on the basis of fully considering the working principle of a continuous wave frequency modulation detector, avoids the difficult problem of generating a high-power signal in a millimeter wave band by externally and synchronously simulating a modulation signal at the front end of the detector, and is suitable for continuous wave frequency modulation system detectors of various frequency bands in various frequency modulation modes.
With reference to fig. 1, the system for testing the processing performance of the continuous wave frequency modulation detection active interference resistant intermediate frequency signal of the invention comprises a continuous wave frequency modulation detector front end module 1, an active interference signal and front end modulation signal synchronous simulation module 6, an intermediate frequency signal synthesizer 16, an embedded real-time control module 17 and an upper computer interaction module 18, wherein:
the continuous wave frequency modulation detector front-end module 1 is used for transmitting a continuous wave frequency modulation detection signal, receiving an echo at the same time, and outputting a target intermediate frequency signal after down-mixing;
the active interference signal and front-end modulation signal synchronous simulation module 6 is used for generating various active deception and active suppression interference signals, and controlling a modulator and a DDS to synchronously generate modulation signals when suppressing interference is simulated;
the intermediate frequency signal synthesizer 16 injects the interference signal generated by simulation into the echo signal of the detector, synthesizes the interfered signal and sends the signal to the intermediate frequency signal processing module to be detected;
the embedded real-time control module 17 interacts with the upper computer interaction module 18 in real time, controls other modules in real time according to the instruction of the upper computer interaction module 18 to simulate interference signals of different parameter systems, and transmits test data of the intermediate frequency signal processing module to be tested to the upper computer interaction module 18;
the upper computer interaction module 18 is used for inputting system simulation parameters and sending the system simulation parameters to the control module, and meanwhile, conducting anti-interference performance analysis on received test data.
As a specific example, the continuous wave frequency modulation detector front-end module 1 includes a transceiving antenna 2, a circulator 3, a mixer 4, a VCO 5; an input interface for providing VCO modulation signals is connected with a modulator 7 in the active interference signal and front-end modulation signal synchronous analog module, and an output interface for providing intermediate frequency signals is connected with a signal synthesizer 16; the working frequency range of the front-end module 1 of the continuous wave frequency modulation detector is not limited, and the frequency modulation mode is not limited.
As a specific example, the active interference signal and front-end modulation signal synchronous analog module 6 includes a modulator 7, a direct frequency synthesizer 8, a clock synchronization controller 9, an analog multiplier 10, a power amplifier 11, a band-pass filter 12, a frequency multiplication module 13, a high-speed digital-to-analog converter 14, and an interference signal path selection switch 15.
As a specific example, the clock synchronization controller 9 receives an instruction of the embedded real-time control module 17, and controls the modulator 7 to generate a corresponding modulation signal to be sent to the front-end module 1 of the continuous wave frequency modulation detector; and when the suppression type interference is simulated, the direct frequency synthesizer 8 is synchronously controlled to generate a corresponding modulated sweep frequency signal, and the sweep frequency signal is sent to the analog multiplier 10 to simulate the process that the interference signal interacts with the emission signal of the detector.
As a specific example, the direct frequency synthesizer 8 directly simulates generating a range-spoofed interference intermediate frequency signal, a speed-spoofed interference intermediate frequency signal, and a range-speed joint spoofed interference intermediate frequency signal; when the suppression type interference is generated in a simulation mode, the direct frequency synthesizer 8 synchronously generates a frequency sweep signal consistent with the parameters of the modulator 7 according to the control command of the clock synchronization module 9.
As a specific example, the high-speed digital-to-analog converter 14 outputs a white gaussian noise signal under the control of the embedded real-time control module 17, and the white gaussian noise signal is sent to the analog multiplier 10 after passing through the frequency doubling module 13, the band-pass filter 12 and the power amplifier 11.
As a specific example, the embedded real-time control module 17 controls the frequency multiplication module 13, the band-pass filter 12 and the power amplifier 11 in real time to realize the suppressed interference signals with different interference bandwidths and interference powers.
As a specific example, the analog multiplier 10 is configured to modulate the noise amplitude modulation compression type interference or the noise frequency modulation compression type interference onto the frequency sweep signal generated by the direct frequency synthesizer 8, so as to simulate a process of actually mixing the interference signal with the local oscillator signal after entering the detector receiver.
As a specific example, the jammer path selection switch 15 is used to select the type of jammer injected into the if signal, which is either a spoofed jammer if signal generated by the direct frequency synthesizer 8 or a squelched jammer if signal output by the analog multiplier 10.
Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The system for testing the processing performance of the continuous wave frequency modulation detection active interference resistant intermediate frequency signal shown in fig. 1 comprises a continuous wave frequency modulation detector front end module 1, an active interference signal and front end modulation signal synchronous simulation module 6, an intermediate frequency signal synthesizer 16, an embedded real-time control module 17 and an upper computer interaction module 18.
The front-end module of the continuous wave frequency modulation detector comprises a transceiving antenna 2, a circulator 3, a mixer 4 and a VCO 5. The input interface for supplying the VCO modulation signal is connected to the modulator 7 and the output interface for supplying the intermediate frequency signal is connected to an intermediate frequency signal synthesizer 16. The front-end module of the continuous wave frequency modulation detector works in a wave band of 8mm, and a triangular wave linear frequency modulation mode is adopted.
The active interference signal and front-end modulation signal synchronous analog module 6 comprises a modulator 7, a direct frequency synthesizer 8, a clock synchronous controller 9, an analog multiplier 10, a power amplifier 11, a band-pass filter 12, a frequency multiplication module 13, a high-speed digital-to-analog converter 14 and an interference signal path selection switch 15.
The clock synchronization control module receives the instruction of the embedded real-time control module 17, controls the modulator to generate a corresponding modulation signal, and sends the modulation signal to the front-end module of the continuous wave frequency modulation detector. When the pressing type interference is simulated, the synchronous control frequency synthesizer 8 generates a corresponding modulated sweep frequency signal, and sends the sweep frequency signal to the analog multiplier 10 to simulate the process of the interference signal interacting with the emission signal of the detector, and the schematic diagram of the output waveform of each module is shown in fig. 2. When deception jamming is simulated, the modulator directly outputs a modulation signal to the front-end module of the continuous wave frequency modulation detector, and the direct frequency synthesizer generates a distance deception jamming intermediate frequency signal, a speed deception jamming intermediate frequency signal and a distance-speed combined deception jamming intermediate frequency signal in a directly simulated mode.
The high-speed digital-to-analog converter 14 outputs a white gaussian noise signal under the control of the embedded real-time control module 17, and the white gaussian noise signal passes through the frequency doubling module 13, the band-pass filter 12 and the power amplifier 11 and then is sent to the analog multiplier 10. The frequency multiplication coefficient, the pass band range of the filter and the power amplification factor can be controlled in real time through the embedded real-time control module 17, so that narrow-band aiming type and broadband blocking type suppression type interference can be realized respectively.
The analog multiplier 10 modulates the noise amplitude modulation compression type interference or the noise frequency modulation compression type interference onto the sweep frequency signal generated by the direct frequency synthesizer to simulate the process of mixing the interference signal with the local oscillation signal after the interference signal enters the detector receiver in practice. By switching the interference signal path selection switch 15, the type of interference injected into the intermediate frequency signal is selected, either the deceptive interference intermediate frequency signal generated directly by the frequency synthesizer or the suppressed interference intermediate frequency signal output by the analog multiplier.
The if signal synthesizer 16 injects the generated if interference signal into the target echo signal of the detector, and sends the signal to the if signal processing module to be detected.
The embedded real-time control module 17 interacts with the upper computer 18 in real time, controls each module in real time according to instructions of the upper computer to simulate interference signals of different parameter systems, and simultaneously transmits test data of the intermediate frequency signal processing module to be tested to the upper computer in real time. The upper computer interaction module 18 can realize human-computer interaction through carried active interference simulation system software, set system simulation parameters and analyze the anti-interference performance of the system on test data.
In conclusion, the invention can simulate diversified signal interference modes, can simulate narrow-band aiming type and wide-band blocking type interference signals, and is suitable for detectors of continuous wave frequency modulation systems of various frequency band frequency modulation modes.
Claims (9)
1. The utility model provides a continuous wave frequency modulation surveys anti active interference intermediate frequency signal processing capability test system which characterized in that: including continuous wave frequency modulation detector front end module (1), active interference signal and front end modulation signal synchronous analog module (6), intermediate frequency signal synthesizer (16), embedded real-time control module (17), host computer interaction module (18), wherein:
the continuous wave frequency modulation detector front-end module (1) is used for transmitting a continuous wave frequency modulation detection signal, receiving an echo at the same time, and outputting a target intermediate frequency signal after down-mixing;
the active interference signal and front-end modulation signal synchronous simulation module (6) is used for generating various active deception and active suppression interference signals, and controlling the modulator and the DDS to synchronously generate modulation signals when suppressing interference is simulated;
the intermediate frequency signal synthesizer (16) injects the interference signal generated by simulation into the echo signal of the detector, synthesizes the interfered signal and sends the signal to the intermediate frequency signal processing module to be detected;
the embedded real-time control module (17) is interacted with the upper computer interaction module (18) in real time, other modules are controlled in real time according to instructions of the upper computer interaction module (18) to simulate interference signals of different parameter systems, and test data of the intermediate frequency signal processing module to be tested are transmitted to the upper computer interaction module (18);
and the upper computer interaction module (18) is used for inputting system simulation parameters, sending the system simulation parameters to the control module and analyzing the anti-interference performance of the received test data.
2. The system for testing the active interference resistance intermediate frequency signal processing performance of continuous wave frequency modulation detection according to claim 1, wherein: the front-end module (1) of the continuous wave frequency modulation detector comprises a transceiving antenna (2), a circulator (3), a frequency mixer (4) and a VCO (5); an input interface for providing VCO modulation signals is connected with a modulator (7) in the active interference signal and front-end modulation signal synchronous analog module, and an output interface for providing intermediate frequency signals is connected with an intermediate frequency signal synthesizer (16); the working frequency range of the front-end module (1) of the continuous wave frequency modulation detector is not limited, and the frequency modulation mode is not limited.
3. The system for testing the active interference resistance intermediate frequency signal processing performance of continuous wave frequency modulation detection according to claim 1, wherein: the active interference signal and front-end modulation signal synchronous analog module (6) comprises a modulator (7), a direct frequency synthesizer (8), a clock synchronous controller (9), an analog multiplier (10), a power amplifier (11), a band-pass filter (12), a frequency multiplication module (13), a high-speed digital-to-analog converter (14) and an interference signal path selection switch (15).
4. The continuous wave frequency modulation detection active interference resistant intermediate frequency signal processing performance test system according to claim 3, characterized in that: the clock synchronization controller (9) receives an instruction of the embedded real-time control module (17), controls the modulator (7) to generate a corresponding modulation signal and sends the modulation signal to the front-end module (1) of the continuous wave frequency modulation detector; and when the suppression type interference is simulated, the direct frequency synthesizer (8) is synchronously controlled to generate a corresponding modulated sweep frequency signal, and the sweep frequency signal is sent to the analog multiplier (10) to simulate the process that the interference signal interacts with the emission signal of the detector.
5. The continuous wave frequency modulation detection active interference resistant intermediate frequency signal processing performance test system according to claim 3, characterized in that: the direct frequency synthesizer (8) directly simulates and generates a distance deception jamming intermediate frequency signal, a speed deception jamming intermediate frequency signal and a distance-speed joint deception jamming intermediate frequency signal; when the suppression type interference is generated in a simulation mode, the direct frequency synthesizer (8) synchronously generates a frequency sweep signal consistent with the parameters of the modulator (7) according to a control command of the clock synchronous controller (9).
6. The continuous wave frequency modulation detection active interference resistant intermediate frequency signal processing performance test system according to claim 3, characterized in that: the high-speed digital-to-analog converter (14) outputs a white Gaussian noise signal under the control of the embedded real-time control module (17), and the white Gaussian noise signal is sent to the analog multiplier (10) after passing through the frequency doubling module (13), the band-pass filter (12) and the power amplifier (11).
7. The continuous wave frequency modulation detection active interference resistant intermediate frequency signal processing performance test system according to claim 3, characterized in that: the embedded real-time control module (17) controls the frequency doubling module (13), the band-pass filter (12) and the power amplifier (11) in real time to realize suppression type interference signals with different interference bandwidths and interference powers.
8. The continuous wave frequency modulation detection active interference resistant intermediate frequency signal processing performance test system according to claim 3, characterized in that: the analog multiplier (10) is used for modulating the noise amplitude modulation compression type interference or the noise frequency modulation compression type interference to the frequency sweeping signal generated by the direct frequency synthesizer (8) so as to simulate the process of mixing the interference signal with the local oscillation signal after the interference signal enters the detector receiver in practice.
9. The continuous wave frequency modulation detection active interference resistant intermediate frequency signal processing performance test system according to claim 3, characterized in that: the interference signal path selection switch (15) is used for selecting the interference type of the injected intermediate frequency signal, and the interference type is a deception interference intermediate frequency signal generated by the direct frequency synthesizer (8) or a suppression interference intermediate frequency signal output by the analog multiplier (10).
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