CN108931769B - A kind of implementation method of any track model of radar - Google Patents
A kind of implementation method of any track model of radar Download PDFInfo
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- CN108931769B CN108931769B CN201810560507.0A CN201810560507A CN108931769B CN 108931769 B CN108931769 B CN 108931769B CN 201810560507 A CN201810560507 A CN 201810560507A CN 108931769 B CN108931769 B CN 108931769B
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/585—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value
- G01S13/586—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value using, or combined with, frequency tracking means
-
- 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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
-
- 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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/406—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder
- G01S7/4065—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder involving a delay line
Abstract
The invention belongs to Radar ECMs, HWIL simulation field, the in particular to a kind of implementation method of any track model of normal radar.This method specifically includes step: (S1) initializes any track model hardware system and parameter is arranged；(S2) it is shown on interface in the radar P of host computer simulation, the track to simulated target is set；(S3) it calculates to simulated target state；(S4) radar signal is detected, amplitude, frequency, pulse width, repetition period and the antenna scan period of radar signal are obtained；(S5) intercept radar signal, and angle value is tolerated according to the radar signal of interception and preset difference, judge whether radar signal is irradiated to simulated target；(S6) modulation and forward signal；(S7) track model enters subsequent time, reruns, until track model process terminates.The present invention can set any track, different type of machines and speed, have certain versatility when carrying out trained electronic countermeasure and target simulation training.
Description
Technical field
The invention belongs to Radar ECMs, HWIL simulation field, in particular to a kind of any track of normal radar
The implementation method of simulation.
Background technique
Radar is a kind of electronic equipment for detecting target, is irradiated by transmitting electromagnetic wave to target and receives its time
Wave, and then the information such as size, distance, speed, orientation for obtaining target.Radar track refers to what target left on radar screen
Ship trajectory.
Any track model is the typical jamming signal type of one of radar deception interference, and one in radar countermeasure training
Kind common training method, it be based on modulation, playback target radar signal, realize different airbound targets, any flight track, can
The simulation for adjusting flying speed can preferably meet the need such as target deception and moving-target proof of algorithm and simulated training of permitting a leave more
It asks.
The critical issue of any track model is that it can successfully capture target radar signal, and accurately measure day
The information such as line beam position, control pulse delay, radio-frequency emission power and Doppler frequency, and then simulate aerial target
Scattering properties, kinetic characteristic.
The generation of true any track needs true Aircraft Targets cooperation, has that at high cost, risk is big, inflexible etc.
Disadvantage, existing any track model is substantially software emulation, stresses motion model and simulation fidelity in any track, does not have
There is true signal, dual training cannot be carried out to true radar.
Summary of the invention
Electronic countermeasure training and target simulation training, this hair are carried out with true radar in order to solve the above technical problems, realizing
Bright to provide a kind of method of true track of analog target, specific technical solution is as follows.
A kind of implementation method of any track model, comprising the following steps:
(S1) it initializes any track model hardware system and parameter is set, specifically: radar is inputted by host computer
Transmission power, the gain of radar antenna and any track model hardware system antenna and the relative distance and orientation of the two, selection
To the type of simulated target, the transmitting-receiving frequency of any track model hardware system is set；
(S2) it is shown on interface in the radar P of host computer simulation, the track to simulated target is set；
(S3) it calculates and calculates each moment Imitating according to the track to simulated target to simulated target state
Orientation, distance and the speed of target；Since initial time, execute step (S4)；
(S4) radar signal is detected, amplitude, frequency, pulse width, repetition period and the antenna scanning of radar signal are obtained
Period；Calculate current radar beam position θbeam·tWith simulated target azimuth angle thetatDifference, by difference and preset difference
Tolerance angle value is compared, and is judged whether radar signal is irradiated to simulated target, if so, being transferred to step (S5), is otherwise held
Row step (S7)；
(S5) intercept radar signal；
(S6) modulation and forward signal, when calculating the transmission power and simulated target of any track model hardware system first
Prolong, Doppler modulation, timing_delay estimation and power control then are carried out to intercept radar signal, obtains the transmitting letter of simulated target
Number, and transmitting signal is forwarded；
(S7) track model enters subsequent time, and return step (S4) reruns, until track model process terminates.
Preferably, the setting is to the method that uses of track of simulated target for straight-line method, polygometry, arc method, circle
Any one of method and the customized method of mouse.
Preferably, the detailed process of radar signal is detected in the step (S4) are as follows: by track model hardware system
Receiving module, radar signal is downconverted into intermediate frequency, then digitize radar signal by AD acquisition module.
Preferably, the specific method of intercept radar signal is cut using lifting edge interception method or timing are long in the step (S5)
It follows the example of or limit intercepts method.
Preferably, in the step (S6) signal modulation and forwarding detailed process are as follows:
First by the distance D of the corresponding RCS of type (Radar Cross Section), simulated target and radar0It is updated to radar
In equation calculate radar should received signal power, further according to D0Track model hardware is obtained with electromagnetic wave one-way only propagation equation
The signal power that system should actually emit；Secondly according to the frequency f of simulated target speed and radar signal0Required for calculating
Doppler frequency generates corresponding simple signal according to Doppler frequency；It is calculated at a distance from radar further according to simulated target double
Cheng Shiyan is as a result, and utilize D0Correct time delay result；Finally intercept radar is believed with revised time delay result and simple signal
It number is modulated, and modulated signal is forwarded.
It is using the beneficial effect that the present invention obtains: (1) any track, different type of machines can be set on the upper computer interface
And speed；(2) electronic countermeasure training and target simulation training can be carried out with true radar；(3) have certain versatility, can fit
With a plurality of radars.(4) this method can replace true track to generate on certain functional plane, have at low cost, flexibility is good etc.
Feature
Detailed description of the invention
Fig. 1 is the flow chart of any track model of radar；
Fig. 2 is the geometrical relationship schematic diagram of radar Yu any track hardware support kit system；
Fig. 3 is track scenario and parameter decomposition schematic diagram.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated.
In conjunction with Fig. 1, a kind of implementation method of any track model of radar provided by the invention, including committed step: setting
Parameter, track scenario calculate dbjective state, detecting radar signal, intercept radar signal, signal modulation forwarding.
The parameter setting, first include any track model hardware system initialization, it usually needs setting receive and
Emit the local frequency of link and keep the two equal, guarantees the progress working properly such as subsequent radar signal detecting, forwarding.Its
The secondary distance D comprising input dual-mode antenna placement position in radar fix system0And azimuth angle theta0, for subsequent calculation delay and
Beam position provides reference.The type of selection track model is additionally comprised, usual type library includes fighter plane, reconnaissance plane, transport
Machine etc., the power that different types corresponds to radar return slightly have difference.Any Track Simulation System is by any track in embodiment
Analog hardware system and upper computer software system are constituted, and by host computer design parameter, correspondence comes into force on hardware system.
The track scenario is exactly that (P is aobvious: a kind of radar asorbing paint of polar form on the aobvious interface simulation P of host computer
Device, type-P display are also known as plane position indicator (PPI) or look around display, belong to radial circular scan and show), by desired mould
Quasi- track is set.Usual trajectory planning has the side such as straight-line method, polygometry, arc method, circle method and the customized method of mouse
Formula, wherein straight-line method is determined by two endpoints, and polygometry refers to that a plurality of straight line is formed by connecting, and arc method passes through the center of circle, starting point
It is determined with terminal, the simulation of circle method is around the orbit of certain point, and the customized method of mouse is to be shown on screen by mouse in P
Dragging forms track.All settable speed or acceleration on track ultimately form a complete, executable track and think
Determine content.
The reckoning dbjective state is exactly to calculate according to track scenario script or inscribe target when decompositing each
Orientation, distance and speed.It, can be with specifically, if it is one of straight-line method, polygometry, arc method or circle method method
It is resolved according to geometric equation and initial velocity, acceleration value；If it is the customized method of mouse, then first can by its similar to
The short broken line of multistage is calculated for broken line according still further to polygometry.
The detecting radar signal obtains the corresponding intermediate-freuqncy signal of radar signal first by down coversion receives link, into
And the pulsewidth T of radar signal is obtained according to the rising and falling edges of rectified signalw, according to the Fourier transformation frequency of intermediate-freuqncy signal
The frequency f of radar signal is obtained with the local frequency of radio frequency reception link0, thunder is obtained according to the repetition interval of identical pulse
Up to signal repetition period TPRI, according to impulse amplitude as the changing rule of time obtains radar antenna scan period TScan, according to
Radar illumination moment T is determined at the time of impulse amplitude maximum valuepeak, finally calculate the current beam direction of radar.
The intercept radar signal, corresponding ideal situation are exactly that target radar pulse signal is carried out to all interception duplications,
Basis as subsequent brew.Actual conditions are usually combined, specific to be intercepted there are three types of mode: lifting is along interception method, timing
Long interception method and limit intercept method.Lifting is based on the rising edge of rectified signal and failing edge along interception method, and interception is multiple
Radar signal of the rising edge time processed to the failing edge moment.In view of actual environment is more complicated, the problems such as there are multipath effects,
Then radar signal has an amplitude modulation, and weak signal is exported without detection, cause to replicate it is imperfect, therefore using the long interception method of timing, i.e.,
It is starting with rising edge, replicates the radar signal of fixed duration, the T of the usual duration parameters and detectingwQuite.Limit interception
Method is synthesis of the lifting along interception and the long interception of timing, i.e., is starting with rising edge, within the scope of the duration of restriction, if there is under
Drop is otherwise end with the maximum time that limits, the method increase the integralities of interception, also drop along with failing edge being then to terminate
A possibility that low interception extra invalid signals.
The distance for simulating the corresponding RCS of type, simulated target and radar is updated to thunder first by the modulation forward signal
Up in equation calculate radar should received signal power, further according to D0Analog hardware system is obtained with electromagnetic wave one-way only propagation equation
The power that system should actually emit；Secondly according to velocity information and f0Doppler frequency needed for calculating, then believed with corresponding single-frequency
Number intercept radar signal is modulated；Round trip time delay is finally calculated at a distance from radar according to simulated target, and utilizes D0
Correct final time delay result.
In the following, being described in detail by a specific embodiment.
The geometrical relationship of radar and any track model hardware system in the present embodiment as shown in Fig. 2, using radar as pole,
Using direct north as polar axis, polar coordinate system is established.Any track model hardware system has Up/Down Conversion link, transmitting-receiving numerical control declines
Subtract device, high-speed AD acquisition circuit and be equipped with FPGA (field programmable gate array) chip and does real-time control and signal processing, DSP
Chip does slave computer and Signal Pretreatment.
S1, setting parameter, set f for the local frequency of Up/Down ConversionPLL, by the geometrical relationship value D of radar and system0
And θ0Input, selectes certain type, then its corresponding RCS is denoted as σ.
S2, track scenario are as shown in figure 3, cooking up on the radar P of signal is aobvious needs track to be simulated, in the present embodiment
It using polygometry, is made of 3 sections of straight lines, the settable different speed, acceleration of every section of straight line；The coordinate of t moment is (Dt,θt),
Speed is (vt,θvt)。
S3, dbjective state is calculated, it is assumed that t0Moment target origin coordinates isStarting velocity and acceleration areWithT on paragraph 1 straight line can then be calculated1Moment, corresponding coordinates of targets and speed are respectivelyIt is specific to meet:
Wherein,
Similarly, it can calculate that the corresponding simulated target coordinate of any time t is (Dt,θt), speed be (vt,θvt)。
S4, the T detected according to radar signalpeak、TScanAnd the θ of parameter setting input0, calculate current radar wave beam and refer to
To θbeam·tAre as follows:
Wherein symbol rem (X1,X2) indicate X1To X2Remainder.
Work as θbeam·tWith θtWhen difference is in tolerance, that is, radar illumination is regarded as to simulated target, needs to start subsequent letter
Number interception, modulation and forwarding etc. work:
S5, intercept radar signal, the present embodiment use limit intercept method, and the time range that limits is arranged as (0.8
Tw,Tw), the radar signal finally intercepted is S (t), it is contemplated that S (t) is usually real number group, then changes to obtain by Hilbert
Its orthogonal signalling is So(t)。
S6, signal modulation forwarding in calculate first radar should received target echo power, utilize relevant parameter and thunder
It is obtained up to equation:
Wherein, PtFor radar transmission power, G is radar antenna gain, λ=c/f0For radar signal wavelength, c indicates the light velocity,
PrEcho power is received for radar.And then by PrSimulation hardware system is instead released with one way electromagnetic wave propagation equation to be emitted
Power PXt, it obtains:
Wherein, GXFor analog hardware system antenna gain, A is radar receiving antenna effective aperture, usuallyThen
It is final to obtain transmission power are as follows:
Secondly the time delay of calculating simulation target, obtains:
Finally realize Doppler modulation, Doppler frequency is calculate by the following formula:
Simple signal M is generated according to Doppler frequencyI(t)、MQ(t):
MI(t)=cos (2 π fdt)
MQ(t)=sin (2 π fdt)
Above formula two orthogonal simple signal combination intercept signals and time delay, obtain final modulated signal Sout(t) are as follows:
Sout(t)=S (t- τXt)MI(t)-So(t-τXt)MQ(t)
Finally, according to PXtValue adjusts transmission power, then by Sout(t) signal emits, and returns and updates θbeam·tWith θtAnd it recycles
It carries out, until the track flight of setting is completed, i.e., successfully simulates the track of setting.
In conclusion any track model is split as specific point target simulated implementation by the present invention, according to point target
Coordinate and state calculate its power, time delay, Doppler modulation etc., it can be achieved that multiple batches of, multi-trace simulation, has flexibility
Well, the advantages that Parameter adjustable, versatility is good.
Claims (5)
1. a kind of implementation method of any track model, it is characterised in that the following steps are included:
(S1) it initializes any track model hardware system and parameter is set, specifically: the transmitting of radar is inputted by host computer
The antenna gain of power, the antenna gain of radar and any track model hardware system, input radar antenna and simulation system
Relative distance and orientation select the type to simulated target, the transmitting-receiving frequency of any track model hardware system are arranged；
(S2) it is shown on interface in the radar P of host computer simulation, the track to simulated target is set；
(S3) it calculates and inscribes the side of target when calculating each according to the track to simulated target to simulated target state
Position, distance and speed；Since initial time, execute step (S4)；
(S4) radar signal is detected, amplitude, frequency, pulse width, repetition period and the antenna scan period of radar signal are obtained,
Calculate current radar beam position θbeam·tWith simulated target azimuth angle thetatDifference, difference and preset difference are tolerated
Angle value is compared, and judges whether radar signal is irradiated to simulated target, if so, being transferred to step (S5), otherwise executes step
Suddenly (S7)；(S5) intercept radar signal；
(S6) modulation and forward signal, calculate the transmission power and simulated target time delay of any track model hardware system first,
Then Doppler modulation, timing_delay estimation and power control are carried out to intercept radar signal, obtains the transmitting signal of simulated target, and
Transmitting signal is forwarded；
(S7) track model enters subsequent time, and return step (S4) reruns, until track model process terminates.
2. a kind of implementation method of any track model as described in claim 1, it is characterised in that: described that mesh to be simulated is arranged
The method that target track uses is any one of straight-line method, polygometry, arc method, circle method and the customized method of mouse.
3. a kind of implementation method of any track model as described in claim 1, it is characterised in that: detectd in the step (S4)
Survey the detailed process of radar signal are as follows: by the receiving module in track model hardware system, radar signal downconverted to
Frequently, then by AD acquisition module by radar signal digitize.
4. a kind of implementation method of any track model as described in claim 1, it is characterised in that: cut in the step (S5)
Take the specific method of radar signal using lifting along interception method or the long interception method of timing or limit interception method.
5. a kind of implementation method of any track model as described in claim 1, which is characterized in that adjusted in the step (S6)
The detailed process of system and forward signal are as follows:
First by the distance D of the corresponding RCS of type, simulated target and radar0Being updated to calculating radar in radar equation should receive
Signal power, further according to D0The signal that track model hardware system should actually emit is obtained with electromagnetic wave one-way only propagation equation
Power；Secondly according to the frequency f of simulated target speed and radar signal0Doppler frequency required for calculating, according to Doppler
Frequency generates corresponding simple signal；Round trip time delay is calculated at a distance from radar further according to simulated target as a result, and utilizing D0It repairs
Positive time delay result；Finally intercept radar signal is modulated with revised time delay result and simple signal, and modulation is believed
It number is forwarded.
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| CN110440791A (en) * | 2019-08-14 | 2019-11-12 | 北京环境特性研究所 | A kind of airborne radar rcs measurement route design method and apparatus |
| CN111123218A (en) * | 2019-12-03 | 2020-05-08 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Track deception jamming system and method for airborne early warning PD radar |
| CN111505589B (en) * | 2020-04-21 | 2022-03-11 | 湖南赛博诺格电子科技有限公司 | Inter-pulse coherent false target interference method and device and computer equipment |
| CN114442051A (en) * | 2020-11-05 | 2022-05-06 | 北京华航无线电测量研究所 | High-fidelity missile-borne radar echo simulation method |
| CN114374979B (en) * | 2021-12-23 | 2024-04-02 | 北京邮电大学 | Method and device for determining isolation distance between 5 GHz-band RLAN station and radar system |
| CN115685101B (en) * | 2022-08-23 | 2023-10-13 | 中国人民解放军陆军炮兵防空兵学院 | Radar parameter measurement error estimation system and method |
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