CN113671452B - Active interference simulation design method for synchronous towing of distance and speed - Google Patents
Active interference simulation design method for synchronous towing of distance and speed Download PDFInfo
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- CN113671452B CN113671452B CN202110909227.8A CN202110909227A CN113671452B CN 113671452 B CN113671452 B CN 113671452B CN 202110909227 A CN202110909227 A CN 202110909227A CN 113671452 B CN113671452 B CN 113671452B
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- 238000004088 simulation Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 claims abstract description 9
- 230000001133 acceleration Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims 1
- 238000001228 spectrum Methods 0.000 description 4
- 238000013139 quantization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The application discloses an active interference simulation design method for synchronous towing of distance and speed, which comprises the following steps: s1: firstly, determining a time length T, and setting a corresponding sampling rate f in the time length T s The method comprises the steps of carrying out a first treatment on the surface of the S2: generating a corresponding experimental radar signal, and setting experimental parameters required by simulation; s3: then inputting simulation parameters, wherein the parameters comprise an initial towing distance parameter, an initial towing speed parameter and a towing speed change parameter, and generating distance-speed combined towing interference data by inputting the three parameters; s4: calculating a distance-speed combined dragging interference signal through a formula, obtaining a time domain point, and generating a time domain graph by taking the distance-speed combined dragging interference signal as a Y axis through multiplying the sampling rate by time as an X axis; meanwhile, after obtaining a time domain point, performing fast Fourier transform, finding an X axis and a frequency domain Y axis, and generating a spectrogram; s5: and outputting the obtained time domain diagram and spectrogram.
Description
Technical Field
The application relates to an active interference simulation design method, in particular to an active interference simulation design method for synchronous dragging of distance and speed.
Background
The range gate trailing interference (Range Gate Pull Off, RGPO) and the speed gate trailing interference (Velocity Gate Pull Off, VGPO) respectively have strong coherence with radar transmitting signals, so that the generated interference signals obtain quite large gains at a radar receiving end, the radar is difficult to distinguish target signals from interference signals, and the range gate-speed gate synchronous trailing interference (RGPO-VGPO) method with the range-speed combined deception capability can not only interfere with the radar with the speed measuring capability or the distance measuring capability, but also effectively interfere with the radar with the range-speed detection capability.
The premise of resisting the active deception jamming signals is that the radar can correctly identify the jamming signals, the existing method can identify the active deception jamming signals in radar receiving wave gates of frequency domain, time-frequency domain, high-order spectral domain or polarization domain, wherein a learner identifies the target signals and the jamming signals in the radar receiving wave gates by extracting amplitude statistics characteristic difference methods between the target signals and the jamming signals, but the method is sensitive to noise and has better target signal or jamming signal identification rate under the condition of higher signal-to-noise ratio; secondly, the model established by the method is too ideal, so that the method can be disabled when a target signal and an interference signal exist in a radar receiving wave gate at the same time. In the current simulation design, no experiment for synchronously dragging an interference source by using distance and speed is available, and the related technical scheme needs to be filled in time.
Disclosure of Invention
The application aims to solve the technical problems that the existing interference simulation fashion does not have design software for synchronously drawing in line simulation aiming at distance and speed, and in the related technical aspect, the application does not aim at simulating signal level, and the application aims to provide an active interference simulation design method for synchronously drawing in distance and speed, so as to solve the problems.
The application is realized by the following technical scheme:
an active interference simulation design method for synchronous towing of distance and speed, comprising the following steps:
s1: firstly, determining a time length T, and setting a corresponding sampling rate f in the time length T s The method comprises the steps of carrying out a first treatment on the surface of the S2: generating a corresponding experimental radar signal, and setting experimental parameters required by simulation; s3: then inputting simulation parameters including initial towing distance parameter and initial towing speedThe method comprises the steps of generating distance speed combined dragging interference data by inputting three parameters, namely a degree parameter and a dragging rate change parameter; s4: calculating a distance-speed combined dragging interference signal through a modulation function formula of the distance delay and the Doppler frequency shift of uniform acceleration dragging, obtaining a time domain point, and generating a time domain diagram by taking the sampling rate multiplied by time as an X axis and the distance-speed combined dragging interference signal as a Y axis; meanwhile, after obtaining a time domain point, performing fast Fourier transform, finding an X axis and a frequency domain Y axis, and generating a spectrogram; s5: and outputting the obtained time domain diagram and spectrogram.
At present, the joint deception of the radar in distance and speed is realized by respectively carrying out delay and Doppler frequency modulation on the intercepted radar signals, namely, the range gate dragging and speed gate dragging interference signals are generated, but at present, when simulation design is carried out, the generated interference signals are difficult to design during the simulation because of the influence of pulse repetition intervals; in practical application, when the jammer based on the digital radio frequency storage technology carries out digital phase quantization sampling and time delay quantization modulation on the intercepted radar signal, because the current technology level is limited, the frequency of the RGPO-VGPO jammer signal synthesized by modulation generates distortion, the RGPO-VGPO jammer signal spectrum synthesized by modulation comprises a series of harmonic spectrums, the harmonic spectrum position and the phase quantization bit number of the broadband RGPO-VGPO jammer signal are related, the spectrum width and the frequency modulation rate of the broadband RGPO-VGPO jammer signal are respectively changed, and the difference exists between the RGPO-VGPO jammer signal and the target signal.
Further, the experimental parameters required for the simulation in the step S2 include the amplitude, carrier frequency and pulse width of the radar signal, and the signal bandwidth, pulse repetition period and pulse number are set at the same time.
Further, after the distance-velocity combined-drag interference data is generated in step S3, if the trigger radar transmission data is a radar for detecting distance and velocity information simultaneously, the distance-velocity combined-drag interference signal is used to perform distance spoofing and velocity gate spoofing interference.
Further, the modulation function of the range delay and doppler shift for the ramp drag is:
wherein , wherein ,distance delay for uniformly accelerating drag; />A modulation function that is a doppler shift; a is acceleration, and the unit is m/s 2; />The radio frequency is represented in Hz; />Indicating the onset of the tug in seconds; />Indicating the tutor in seconds; />Indicating a tamper-off period in seconds; />For wavelength, < >>The unit is m, c is the speed of light, the value is 3e8, and the unit is m/s.
Compared with the prior art, the application has the following advantages and beneficial effects:
1. the active interference simulation design method for synchronous towing of distance and speed can simulate the towing interference of the speed wave gate under the deception interference, and can finish the realization of the simulation of a speed distance wave gate towing interference signal machine, thereby solving the problem that the whole related field can not perform signal level simulation under the condition at present.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a flow chart of a simulation method of the present application.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
Examples
As shown in FIG. 1, the active interference simulation design method for synchronous towing of distance and speed comprises the following steps: s1: firstly, determining a time length T, and setting a corresponding sampling rate f in the time length T s S2: generating a corresponding experimental radar signal, and setting experimental parameters required by simulation; s3: then inputting simulation parameters, wherein the parameters comprise an initial towing distance parameter, an initial towing speed parameter and a towing speed change parameter, and generating distance-speed combined towing interference data by inputting the three parameters; s4: calculating a distance-speed combined dragging interference signal through a modulation function formula of the distance delay and the Doppler frequency shift of uniform acceleration dragging, obtaining a time domain point, and generating a time domain diagram by taking the sampling rate multiplied by time as an X axis and the distance-speed combined dragging interference signal as a Y axis; meanwhile, after obtaining a time domain point, performing fast Fourier transform, finding an X axis and a frequency domain Y axis, and generating a spectrogram; s5: and outputting the obtained time domain diagram and spectrogram.
After the whole flow is completed through the steps, a time domain diagram and a spectrogram can be obtained, a related technician can effectively acquire various parameters in the time length T through the two diagrams, and through the simulation mode, specific parameters obtained after synchronous dragging of the distance and the speed under the active interference condition can be acquired, and signal level simulation can not be carried out under the condition in the related field.
The experimental parameters required by the simulation in the step S2 comprise the amplitude, the carrier frequency and the pulse width of the radar signal, and the signal bandwidth, the pulse repetition period and the pulse number are set at the same time. After the distance-speed combined dragging interference data is generated in step S3, if the trigger radar sending data is a radar for simultaneously detecting distance and speed information, the distance-speed combined dragging interference signal is used to perform distance deception and speed gate deception interference.
For a radar capable of detecting distance and speed information simultaneously, a distance-speed combined trailing interference signal can be used, and speed-wave door spoofing interference can be performed simultaneously with distance spoofing. The distance delay and Doppler shift of the drag-and-drag are modulated by the modulation function
wherein ,distance delay for uniformly accelerating drag; />A modulation function that is a doppler shift; a is acceleration, and the unit is m/s 2; />The radio frequency is represented in Hz; />Indicating the onset of the tug in seconds; />Indicating the tutor in seconds; />Indicating a tamper-off period in seconds; />For wavelength, < >>The unit is m, c is the speed of light, the value is 3e8, and the unit is m/s.
The input parameters of the range speed combined drag disturbance are set by basic parameters, and the input parameters of the range speed combined drag disturbance comprise a starting drag distance, a starting drag speed, a drag speed change rate and an IQ rate (baseband sampling rate).
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (4)
1. The active interference simulation design method for synchronous towing of distance and speed is characterized by comprising the following steps:
s1: firstly, determining a time length T, and setting a corresponding sampling rate f in the time length T s ;
S2: generating a corresponding experimental radar signal, and setting experimental parameters required by simulation;
s3: then inputting simulation parameters, wherein the parameters comprise an initial towing distance parameter, an initial towing speed parameter and a towing speed change parameter, and generating distance-speed combined towing interference data by inputting the three parameters;
s4: calculating a distance-speed combined dragging interference signal through a modulation function formula of the distance delay and the Doppler frequency shift of uniform acceleration dragging, obtaining a time domain point, and generating a time domain diagram by taking the sampling rate multiplied by time as an X axis and the distance-speed combined dragging interference signal as a Y axis; meanwhile, after obtaining a time domain point, performing fast Fourier transform, finding an X axis and a frequency domain Y axis, and generating a spectrogram;
s5: and outputting the obtained time domain diagram and spectrogram.
2. The method according to claim 1, wherein the experimental parameters required for the simulation in step S2 include amplitude, carrier frequency and pulse width of the radar signal, and the signal bandwidth, pulse repetition period and pulse number are set at the same time.
3. The method according to claim 1, wherein after the distance-speed combined dragging interference data is generated in step S3, if the trigger radar sends data as a radar for simultaneously detecting distance and speed information, the distance-speed combined dragging interference signal is used to perform distance spoofing and speed gate spoofing interference.
4. The method according to claim 1, wherein the calculation formula adopted in the step S4 is a modulation function formula of a distance delay and a doppler shift of a uniform acceleration drag, and the velocity joint drag interference data is calculated by the formula, and the formula is:
wherein ,distance delay for uniformly accelerating drag; />A modulation function that is a doppler shift; />Acceleration is given in m/s 2; />The radio frequency is represented in Hz; />Indicating the onset of the tug in seconds; />Indicating the tutor in seconds; />Indicating a tamper-off period in seconds; />For wavelength, < >>The unit is m, c is the speed of light, the value is 3e8, and the unit is m/s.
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