CN109597035A - A kind of analogy method of angle deception interference echo - Google Patents
A kind of analogy method of angle deception interference echo Download PDFInfo
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- CN109597035A CN109597035A CN201811376325.4A CN201811376325A CN109597035A CN 109597035 A CN109597035 A CN 109597035A CN 201811376325 A CN201811376325 A CN 201811376325A CN 109597035 A CN109597035 A CN 109597035A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 12
- 238000004088 simulation Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035485 pulse pressure Effects 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention belongs to signal processing technology fields, disclose a kind of analogy method of angle deception interference echo, comprising: obtain the transmitting signal of missile-borne radar, and according to the transmitting signal, determine the reception signal of missile-borne radar；According to the reception signal of missile-borne radar, the delay of angle deception interference is determined；Calculate the gain of angle deception interference；Obtain the echo power of angle deception interference；According to the echo power of the angle deception interference, the system function of angle deception interference is determined；The practical work process of jammer can be preferably simulated, and calculation amount is small, realized simple.
Description
Technical field
The invention belongs to signal processing technology field more particularly to a kind of analogy methods of angle deception interference echo, can
For generating the interference signal that can cheat radar angle measurement system.
Background technique
Angle deception interference is to one of most significant conflicting mode of tracking radar.Many guided missiles can be in no distance
Continue to complete strike mission in the case where guidance, but absolutely cannot aimless angle information, so successful implementation angle
Cheating interference can reduce the hit rate for the weapon system being associated with radar system significantly.Angle deception interference is mainly used to
It destroys the angle tracking ability of radar and any angular-sensitive system or is allowed to track the perturbation technique of false angle information.Pass through interference
Machine is launched with the angle position of target interference echo devious, and the angle measurement of radar is made deviation occur, and then destroys thunder
Up to angle-tracking system.
The method of many of prior art analog angle cheating interference mainly has angle scintillations interference, coherent interference, intersection
Polarization interference etc..For example the basic reason that angle scintillations interference generates is when target is not to be regarded as point target, still according to a mesh
Target angle-measuring method carries out angle measurement, to cause angle error.Moreover, the angle measurement error it is very sensitive in target it is opposite with
The posture of radar certainly exists attitudes vibration of the target relative to radar, in actual radar observation so as to cause angle
The fast hop of measured value changes, and here it is angle scintillations phenomenons.The influence of angle scintillations subtracts with the distance between radar and target
It is small and increase, but its required jamming power is larger, it calculates complicated, and is easy to be identified by radar.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of analogy method of angle deception interference echo, it can
The practical work process of preferable simulation jammer, and calculation amount is small, realizes simple.
In order to achieve the above objectives, the present invention is realised by adopting the following technical scheme.
A kind of analogy method of angle deception interference echo, described method includes following steps:
Step 1, the transmitting signal of missile-borne radar is obtained, and according to the transmitting signal, determines the reception letter of missile-borne radar
Number；
Step 2, according to the reception signal of missile-borne radar, the delay of angle deception interference is determined；
Step 3, the gain of angle deception interference is calculated；
Step 4, the echo power of angle deception interference is obtained；
Step 5, according to the echo power of the angle deception interference, the system function of angle deception interference is determined.
The characteristics of technical solution of the present invention and further improvement are as follows:
(1) step 1 specifically includes:
The transmitting signal s (t) of (1a) acquisition missile-borne radar:
Wherein, Tp is the pulse width that missile-borne radar emits signal, and t is time, f0Emit the load of signal for missile-borne radar
Frequently,Emit the chirp rate of signal for missile-borne radar, B is the bandwidth that missile-borne radar emits signal, and rect () is square
Shape envelope；
(1b) determines reception signal y (t): y (t)=s (t- τ of missile-borne radar according to the transmitting signal s (t)0)；Its
In, τ0For the delay of echo signal,RposIndicate the real time position of missile-borne radar, TposIndicate target
Real time position.
(2) step 2 specifically includes following sub-step:
(2a) obtains speed of the target relative to the azimuth direction upper angle cheating interference of missile-borne radar
Spend vf:
vf=(vi-vt).*(Rpos-Tpos)/|Rpos-Tpos|
Wherein, viFor the three-dimensional velocity of angle deception interference, vtFor the three-dimensional velocity of target, RposIndicate the reality of missile-borne radar
When position, TposIndicate the real time position of target；
(2b) obtains angle deception interference and missile-borne radar according to the speed of the azimuth direction upper angle cheating interference
The real-time range R of horizontal plane1:
Wherein, x, y are the X-coordinate and Y-coordinate in missile-borne radar real time position, and x ', y ' are that the X in target real time position is sat
Mark and Y-coordinate, t indicate the time；
(2c) calculates angle deception interference and the real-time range R of missile-borne radar spatially0:
Wherein, z is the z coordinate in missile-borne radar real time position, and z ' is the z coordinate in target real time position；
(2d) is according to the angle deception interference and the real-time range R of missile-borne radar spatially0, it is dry to calculate angle deception
The delay τ (t) disturbed:
Wherein, c indicates the light velocity.
(3) step 3 specifically includes following sub-step:
(3a) calculates pitching angle theta and azimuth of the angle deception interference relative to missile-borne radar
Wherein, (x0, y0, z0) indicate missile-borne radar beam center and missile-borne radar relative coordinate, (x1, y1, z1) indicate
The relative coordinate of angle deception interference and missile-borne radar；
The gain G of (3b) calculating missile-borne radar 't:
Wherein, θ0Indicate the azimuth that missile-borne radar antenna beam is directed toward,Indicate what missile-borne radar antenna beam was directed toward
Pitch angle, θ3dBIndicate the orientation half-power beam width of missile-borne radar antenna,Indicate missile-borne radar antenna pitching to
Half-power beam width；
(3c) calculates pitching angle theta ' and azimuth of the missile-borne radar relative to angle deception interference
Wherein, (x '0, y '0, z '0) indicate jammer beam center and missile-borne radar relative coordinate, (x '1, y '1, z '1)
Indicate the relative coordinate of missile-borne radar and jammer；
The gain G of (3d) calculating jammerj:
Wherein, θ '0Indicate the azimuth that jammer antenna beam is directed toward,Indicate the pitching that jammer antenna beam is directed toward
Angle, θ '3dBIndicate the orientation half-power beam width of jammer antenna,Indicate the pitching of jammer antenna to half-power wave
Beam width；
The gain G (t) of (3e) calculating angle deception interference: G (t)=GjG′t。
(4) step 4 specifically:
Obtain the echo power P of angle deception interferenceJ:
Wherein, PtFor the transmission power of missile-borne radar, λ is the wavelength that missile-borne radar emits signal, and σ is angle deception interference
Scattering resonance state, R0For the real-time oblique distance of radar and angle deception interference, G (t) is the gain of angle deception interference.
(5) step 5 specifically:
According to the echo power P of angle deception interferenceJ, determine the system function J (t) of angle deception interference:Wherein, y (t- τ (t)) is modulated angle deception interference signal, and τ (t) is angle deception interference
Delay.
Compared with prior art, the present invention the spatial relation of radar and target is utilized, it is right in conjunction with its spatial relationship
The pitch angle of radar system is cheated, and realizes that simply calculation amount is smaller, can be more true right by simulink simulation
Entire interfering process carries out the Realization of Simulation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the spatial relation figure of interference with target, radar；
Fig. 2 is the flow chart of technical solution of the present invention；
Fig. 3 is radar system and channel pulse pressure figure；
Fig. 4 is the measurement result figure of radar system.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Angle deception interference is to lure that radar tracking system mistakenly tracks interference signal into a manner of angle deception, is passed through
After the angle of a period of time tows so that radar angular tracking gate leaves target a distance, interference signal suddenly disappears, and leads
It causes radar to lose target, is forced to be transferred to search condition, be finally reached the purpose that interference radar works normally.
The embodiment of the present invention provides a kind of analogy method of angle deception interference echo, as shown in Figure 1, the method packet
It includes:
Step 1, parameter is set.
Assuming that scene missile-borne platform is in height in the air with speed v (vx, vy, vz) movement, there is the movement velocity of a point target on ground
For v0(v′x, v 'y, v 'z), interfere as shown in Figure 2 with the spatial relation of target, radar: the position of radar in space is
Rpos(x0, y0, z0), the position of target in space is Tpos(x′0, y '0, z '0), subpoint of the radar in xoy plane is Rxy
(x0, y0, 0), subpoint of the target in xoy plane is Txy(x′0, y '0, 0), in straight line RxyTxyOne is added on direction to do
It disturbs, disturbance velocity vi(v″x, v "y, v "z) be provided that
Wherein, T is interference period, 0 < t < t1Expression stops dragging the phase, and interference is identical with echo signal at this time, but amplitude is bigger
In target echo, t1< t < t2Expression tows the phase, and interference signal and target gradually separate at this time, starts in angle to radar system
System is cheated, t2< t < T indicates closed-down period, and interference signal disappears at this time, less than signal, i.e., the tracking system of radar monitors
Radar loses target, restores search condition again.
Step 2, the transmitting signal s (t) of radar is obtained:
Wherein, Tp is pulse width, and t is time, f0For carrier frequency,For chirp rate, B is transmitted signal bandwidth.
Step 3, it according to transmitting signal s (t), obtains and receives signal y (t).
Y (t)=s (t- τ0)
Wherein,Indicate the delay of target, the real time position of radar is Rpos(x, y, z), the reality of target
When position be Tpos(x ', y ', z ').
Step 4, according to signal y (t) is received, design angle cheating interference is delayed τ (t).
(4a) obtains the disturbance velocity v on azimuth direction according to the spatial relationship of radar and targetf: vf=(vi-
vt).*(Rpos-Tpos)/|Rpos-Tpos|；
Wherein, viIndicate the three-dimensional velocity of interference, vtIndicate the three-dimensional velocity of target, the real time position of radar is Rpos(x,
Y, z), the real time position of target is Tpos(x ', y ', z ')；
(4b) is according to interference along azimuthal radial velocity vf, obtain the real-time range R of interference with radar level1:Wherein, t indicates the time；
(4c) calculates interference and radar real-time range R in space0:
(4f) is according to the real-time range R interfered with radar0, calculate angle deception interference delay τ (t):
Step 5, according to Antenna Design, the gain G (t) of interference signal is obtained.
(5a) calculates pitching angle theta and azimuth of the interference relative to radar
Wherein, (x0, y0, z0) indicate radar beam center and radar relative coordinate, (x1, y1, z1) indicate interference and thunder
The relative coordinate reached.
The gain G of (5b) calculating radar 't:
Wherein, θ0Indicate the azimuth of radar antenna beam position,Indicate the pitch angle of radar antenna beam position,
θ3dBIndicate the orientation half-power beam width of radar antenna,Indicate the pitching of radar antenna to half-power beam width.
(5c) calculates pitching angle theta ' and azimuth of the radar relative to interference
Wherein, the relative coordinate of jammer beam center and radar is (x '0, y '0, z '0), radar and jammer it is opposite
Coordinate (x '1, y '1, z '1)；
The gain G of (5d) calculating jammerj:
Wherein, θ '0Indicate the azimuth that jammer antenna beam is directed toward,Indicate the pitching that jammer antenna beam is directed toward
Angle, θ '3dBIndicate the orientation half-power beam width of jammer antenna,Indicate the pitching of jammer antenna to half-power wave
Beam width.
The gain G (t) of (5f) calculating interference signal: G (t)=GjG′t。
Step 6, it according to radar equation, calculates echo power P (t):
Wherein, PtFor radar transmission power, λ is radar wavelength, and σ is the scattering resonance state of interference.
Step 7, the system function J (t) of interference echo is calculated:
Step 4 to step 7 is subjected to module division according to above step, angle deception is realized in simlink platform.
Module input: the starting distance wave door R_start of echo impulse, radar three-dimensional position coordinates RadarPosition,
Radar three-dimensional speed coordinate RadarPosition, target three-dimensional location coordinates TargetPosition, target three-dimensional velocity
The antenna gain AntFactor_ of pixel coordinate Beamcenter and channel where TargetVelocity, beam center
Sum, the antenna gain AntFactor_azi in gun parallax channel, the antenna gain AntFactor_ele in trim channel, mode
Strobe pulse FrameGroup
Module output: and channel system function A_sys_sum, gun parallax channel system function A_sys_azi, trim are logical
Road system function A_sys_ele
Simulated effect of the invention can also be further illustrated by following emulation experiment.
1. simulation parameter:
Simulation parameter setting of the invention is as shown in the table.
1 system emulation parameter of table
| Parameter | Numerical value | Parameter | Numerical value |
| Emit signal carrier frequency | 16GHz | Baseband sampling frequency | 300MHz |
| Pulse repetition | 10kHz | Pulsewidth | 5us |
| Bandwidth | 75MHz | Disturbance velocity | (150,0,0) m/s |
| Target initial position | (0,0,0) m | Target velocity | (50,0,0) m/s |
2. emulation content:
Under above-mentioned simulation parameter, the interference signal generated using the present invention is added radar system and measures verifying.?
Radar system and channel pulse pressure result as shown in figure 3, the measurement result of radar system as shown in figure 4, wherein figure (4a) is single
The distance measurement result of pulse, figure (4b) are the range error of pulse, and figure (4c) is the azimuthal measurement result of pulse, are schemed (4d)
For the azimuthal measurement error of pulse, the measurement result that (4e) is pulse pitch angle is schemed, figure (4f) is pulse pitch angle
Measurement error.
Show that radar system detects two stronger echo-signals in Fig. 3, it was demonstrated that the interference signal that the present invention simulates is
Effectively.
Show interference signal to the interference effect of radar system in Fig. 4: figure (4a) and figure (4b) show interference signal to survey
Away from there is a degree of influence, figure (4c) and figure (4d) show influence of the interference signal to radar bearing angle almost and can ignore not
Meter shows that interference signal azimuthal does not influence；Figure (4e) and figure (4f) show influence of the interference signal to radar pitch angle, phase
For azimuthal measurement result, detections of radar to pitch angle be obviously interfered the influence of signal.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can store in computer-readable storage medium, which exists
When execution, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic or disk
Etc. the various media that can store program code.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (6)
1. a kind of analogy method of angle deception interference echo, which is characterized in that described method includes following steps:
Step 1, the transmitting signal of missile-borne radar is obtained, and according to the transmitting signal, determines the reception signal of missile-borne radar；
Step 2, according to the reception signal of missile-borne radar, the delay of angle deception interference is determined；
Step 3, the gain of angle deception interference is calculated；
Step 4, the echo power of angle deception interference is obtained；
Step 5, according to the echo power of the angle deception interference, the system function of angle deception interference is determined.
2. a kind of analogy method of angle deception interference echo according to claim 1, which is characterized in that step 1 is specific
Include:
The transmitting signal s (t) of (1a) acquisition missile-borne radar:
Wherein, Tp is the pulse width that missile-borne radar emits signal, and t is time, f0Emit the carrier frequency of signal for missile-borne radar,Emit the chirp rate of signal for missile-borne radar, B is the bandwidth that missile-borne radar emits signal, and rect () is rectangle packet
Network；
(1b) determines reception signal y (t): y (t)=s (t- τ of missile-borne radar according to the transmitting signal s (t)0)；Wherein, τ0
For the delay of echo signal,RposIndicate the real time position of missile-borne radar, TposIndicate the real-time position of target
It sets.
3. a kind of analogy method of angle deception interference echo according to claim 1, which is characterized in that step 2 is specific
Including following sub-step:
(2a) obtains speed v of the target relative to the azimuth direction upper angle cheating interference of missile-borne radarf:
vf=(vi-vt).*(Rpos-Tpos)/|Rpos-Tpos|
Wherein, viFor the three-dimensional velocity of angle deception interference, vtFor the three-dimensional velocity of target, RposIndicate the real-time position of missile-borne radar
It sets, TposIndicate the real time position of target；
(2b) obtains angle deception interference and missile-borne radar is horizontal according to the speed of the azimuth direction upper angle cheating interference
The real-time range R in face1:
Wherein, x, y be missile-borne radar real time position in X-coordinate and Y-coordinate, x ', y ' be target real time position in X-coordinate and
Y-coordinate, t indicate the time；
(2c) calculates angle deception interference and the real-time range R of missile-borne radar spatially0:
Wherein, z is the z coordinate in missile-borne radar real time position, and z ' is the z coordinate in target real time position；
(2d) is according to the angle deception interference and the real-time range R of missile-borne radar spatially0, calculate angle deception interference
It is delayed τ (t):
Wherein, c indicates the light velocity.
4. a kind of analogy method of angle deception interference echo according to claim 1, which is characterized in that step 3 is specific
Including following sub-step:
(3a) calculates pitching angle theta and azimuth of the angle deception interference relative to missile-borne radar
Wherein, (x0, y0, z0) indicate missile-borne radar beam center and missile-borne radar relative coordinate, (x1, y1, z1) indicate angle
The relative coordinate of cheating interference and missile-borne radar；
The gain G of (3b) calculating missile-borne radar 't:
Wherein, θ0Indicate the azimuth that missile-borne radar antenna beam is directed toward,Indicate the pitching that missile-borne radar antenna beam is directed toward
Angle, θ3dBIndicate the orientation half-power beam width of missile-borne radar antenna,Indicate the pitching Xiang Bangong of missile-borne radar antenna
Rate beam angle；
(3c) calculates pitching angle theta ' and azimuth of the missile-borne radar relative to angle deception interference
Wherein, (x '0, y '0, z '0) indicate jammer beam center and missile-borne radar relative coordinate, (x '1, y '1, z '1) indicate
The relative coordinate of missile-borne radar and jammer；
The gain G of (3d) calculating jammerj:
Wherein, θ '0Indicate the azimuth that jammer antenna beam is directed toward,Indicate the pitch angle that jammer antenna beam is directed toward,
θ′3dBIndicate the orientation half-power beam width of jammer antenna,Indicate the pitching of jammer antenna to half-power beam
Width；
The gain G (t) of (3e) calculating angle deception interference: G (t)=GjG′t。
5. a kind of analogy method of angle deception interference echo according to claim 1, which is characterized in that step 4 is specific
Are as follows:
Obtain the echo power P of angle deception interferenceJ:
Wherein, PtFor the transmission power of missile-borne radar, λ is the wavelength that missile-borne radar emits signal, and σ is dissipating for angle deception interference
Penetrate sectional area, R0For the real-time oblique distance of radar and angle deception interference, G (t) is the gain of angle deception interference.
6. a kind of analogy method of angle deception interference echo according to claim 1, which is characterized in that step 5 is specific
Are as follows:
According to the echo power P of angle deception interferenceJ, determine the system function J (t) of angle deception interference:Wherein, y (t- τ (t)) is modulated angle deception interference signal, and τ (t) is angle deception interference
Delay.
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Application publication date: 20190409 |