CN107390186A - Compacting interference signal transmission power method of estimation - Google Patents
Compacting interference signal transmission power method of estimation Download PDFInfo
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- CN107390186A CN107390186A CN201710548857.0A CN201710548857A CN107390186A CN 107390186 A CN107390186 A CN 107390186A CN 201710548857 A CN201710548857 A CN 201710548857A CN 107390186 A CN107390186 A CN 107390186A
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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
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
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Abstract
Compacting interference signal transmission power method of estimation, comprises the following steps：Radar beam points to target, radar transmitter transmitting radar signal, and reconnaissance plane intercepts and captures radar signal, estimates the transmission power of radar signal；Radar receiver receives target echo, estimates target echo power；Estimation produces the interfering signal power that radar receiver receives when it is expected interference；The transmission power for the interference signal that the interfering signal power estimation jammer received according to radar receiver is launched.The decay that the inventive method is propagated signal space by considering environmental factor, and reflect this decay onto the propagation factor in the estimation procedure of signal transmission power, and then can more accurately obtain being used for the jammer transmission signal power for suppressing interference under effective disturbed condition.
Description
Technical field
It is more particularly to a kind of to be used to suppress interference in electronic countermeasure application the invention belongs to signal processing technology field
The precise Estimation Method of signal transmission power.
Background technology
During electronic countermeasure, tracked with jammer interference other side, guidance radar, reduce other side's radar weapon
Fighting efficiency, capture and keep local message advantage to turn into the key that current confrontation both sides seize the initiative.Active suppressing
Can interference implement active blanking jamming to letter as one of conflicting mode the simplest and conventional during electronic countermeasure
The initiative and supporting operations that one's own side resists in breath countereffort all have important influence.Nowadays it is directed to radar active briquettability
The identification overwhelming majority of interference is differentiated using the size of signal power, if the signal power of compacting interference transmitting is excessive,
Easily give away one's position and attacked；And when jamming power is more than minimum compacting jamming power, missile excess energy is again
Unnecessary energy resource consumption can be formed, and easily one's own side's electronic equipment is had an impact.Therefore to the transmitting work(of compacting interference
Can rate be precisely controlled to the basis that effectively implement for active pressing jamming and be ensured, therefore the accurate estimation pair of jamming power
The realization of radar active suppression jamming has great importance.
The signal transmission power evaluation method of traditional pressing type interference, primary concern is that under the conditions of free space,
Condition for validity, transmission power when estimation jammer effectively disturbs are disturbed according to compacting.But the process does not consider ground (sea
Face) and its propagation medium to radar wave in the influence of spatial, this can make the calculating of jamming power produce larger error, very
The jamming power that may extremely calculate under this condition is unable to reach expected pressing result, so as to influence one's own side's posture of operation.
And radar very little work, under conditions of proximate freedom space, the radar of most real works all can be by ground (sea
Face) and its propagation medium influence, therefore, signal propagate path loss be that must take into consideration in the accurate estimation of jamming power
Practical problem.
The content of the invention
It is an object of the invention to provide can accurately estimate compacting interference signal in a kind of confrontation applied to electronic interferences
Transmission power method.
To achieve these goals, the present invention adopts the following technical scheme that：
Compacting interference signal transmission power method of estimation, comprises the following steps：Radar beam points to target, radar transmitter
Launch radar signal,
The transmission power estimating step of radar signal；Reconnaissance plane intercepts and captures radar signal, estimates the transmission power of radar signal
Pt：
P in formularThe signal power received for reconnaissance plane, RrDistance between reconnaissance plane and radar, FprFor radar signal
Propagation factor between radar and reconnaissance plane during spatial, Gt(θr) it is radar antenna when reconnaissance plane investigates radar signal
Directive gain, GrFor reconnaissance plane antenna gain, λ is radar signal wavelength；
Target echo power estimation step；Radar receiver receives target echo, estimates target echo power Prs：
P in formulatFor the transmission power of radar signal, GtFor radar antenna alignment target when antenna gain, σ is target
Radar cross section, RtDistance between radar and target, FptIt is radar signal between radar and target during spatial
Propagation factor；
The interfering signal power scope estimating step that radar receiver receives；Radar receiver when it is expected interference is produced to receive
Interfering signal power PrjScope be：
Wherein, KjThe blanket factor effectively disturbed for radar receiver input, PrsFor target echo power, Δ fjIt is dry
Disturb signal bandwidth, Δ frFor radar receiver bandwidth, PnFor radar receiver internal thermal noise power, m is jammer identification system
Number；
The transmission power estimating step of the interference signal of jammer transmitting；The interference signal work(received according to radar receiver
The transmission power of rate scope estimated disturbance signal：
Wherein, RjDistance between jammer and radar, FpjFor interference signal between jammer and radar spatial
When propagation factor, GjThe potato masher antenna gain of antenna alignment radar, G when launching interference signal for jammert(θj) connect for radar
Receive radar antenna gain during interference signal, γjFor the polarization mismatch loss coefficient of interference signal and radar signal.
More specifically, propagation factor of the radar signal between radar and reconnaissance plane during spatialIn formula
ArFor path loss of the radar signal between reconnaissance plane and radar during spatial.
More specifically, propagation factor of the radar signal between radar and target during spatialIn formula
AtFor the path loss of signal spatial between radar and target.
More specifically, propagation factor during spatial of the interference signal between jammer and radarFormula
In AjFor the path loss of signal spatial between jammer and radar.
More specifically, when producing effectively interference, the interfering signal power P of radar receiver receptionrjMinimum value beThe then interfering signal power P of jammer transmittingj's
Minimum value is：
From above technical scheme, the present invention is when estimation is used to suppress the transmission power of the signal of interference, by radar
The path loss that signal is propagated is taken in, and radar signal is intercepted and captured using reconnaissance plane, accurate to estimate radar emission signal power；Again
Using radar emission signal power and target component, the accurate target echo power estimated radar and received；Then connect according to radar
The target echo power of receipts, derive the jamming power scope effectively needed for compacting interference；Finally according to estimated effective pressure
Jamming power scope needed for system interference, select rational interference transmission power.The present invention can be realized to suppressing interference signal
The accurate estimation of transmission power, can be applied in aero-electronic countermeasure strength, take Iong-distance support conflicting mode, remote to enemy ground
Journey early warning radar implements active pressing jamming, and with shielding, we implements anti-scene of dashing forward, and can also be applied to other compacting interference pair
Anti- field.
Brief description of the drawings
Fig. 1 is radar chaff space schematic diagram.
Fig. 2 is the flow chart of the inventive method.
The embodiment of the present invention is described in more detail below in conjunction with accompanying drawing.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme of the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other implementation that those of ordinary skill in the art obtain under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
In order to accurately estimate to suppress the transmission power of interference signal, unnecessary energy waste is avoided, while reduced
High interfering signal power adds on unnecessary influence caused by one's own side's electronic equipment, the present invention when estimating signal transmission power
This influence factor of the path loss of signal propagation, with reference to Fig. 1 and Fig. 2, by taking monostatic radar as an example, to the side of the present invention
Method is described in detail.
The step of the inventive method, is as follows：Radar beam points to target, and radar transmitter launches radar signal,
S100, radar signal transmission power estimating step；Reconnaissance plane intercepts and captures radar signal, estimation radar transmitter transmitting
The transmission power P of radar signalt；
λ in formula is radar signal wavelength, PrThe signal power received for reconnaissance plane, RrBetween reconnaissance plane and radar away from
From FprFor propagation factor of the radar signal between radar and reconnaissance plane during spatial, GrFor reconnaissance plane antenna gain, Gt
(θr) for reconnaissance plane investigate radar signal when radar antenna directive gain, θrFor drift angle of the radar antenna on reconnaissance plane direction；
Wherein, the signal power P that radar signal wavelength X, reconnaissance plane receiver, distance R between reconnaissance plane and radarrIt can pass through
The radar signal that reconnaissance plane is intercepted and captured obtains；FprThe environment propagated according to signal between radar and reconnaissance plane calculates：
ArFor path loss of the signal between reconnaissance plane and radar during spatial, ArValue be environment composite attenuation and free space
Transmission loss sum, unit dB；
S200, target echo power estimation step；Radar receiver receives target echo, estimates the mesh at radar receiver
Mark echo power Prs；
P in formulatFor the transmission power of radar signal, RtDistance between radar and target, GtMesh is directed at for radar antenna
The antenna gain of timestamp, σ be target radar cross section, FptFor biography of the radar signal between radar and target during spatial
Broadcast the factor, FptThe environment propagated according to signal between radar and target calculates：AtFor signal radar and target it
Between spatial path loss；Need to consider the two-way attenuation that signal is propagated in the calculating of target echo power,Represent thunder
The round trip signal attenuation for propagating to radar again is reflected after up to the signal arrival target of transmitting through target；
According to the transmission power P of radar signalt, target echo power PrsIt can be further represented as：
The interfering signal power P that S300, radar receiver receiverjEstimating step；
The desirably setup parameter of caused interference signal, according to effective compacting disturbed condition, with reference to bandwidth considerations
Influence, calculate the interfering signal power P for producing that radar receiver receives when it is expected interferencerjScope, that is, produce it is expected interference when
The interfering signal power P that radar receiver receivesrjThe condition that need to meet：
Wherein, KjThe blanket factor effectively disturbed for radar receiver input, Δ fjFor jamming signal bandwidth, Δ frFor
Radar receiver bandwidth, PrsFor target echo power, PnFor radar receiver internal thermal noise power, m is jammer identification system
Number；
The interfering signal power P that radar receiver receives when interference signal realizes effectively interferencerjScope can further table
It is shown as：
That is, when producing effectively interference, the minimum value for the interfering signal power that radar receiver receives
The transmission power P for the interference signal that S400, jammer are launchedjEstimating step；
Wherein, RjDistance between jammer and radar, FpjFor interference signal between jammer and radar spatial
When propagation factor, GjThe potato masher antenna gain of antenna alignment radar, G when launching interference signal for jammert(θj) connect for radar
Receive radar antenna gain during interference signal, θjFor drift angle of the radar antenna on jammer direction, γjFor interference signal and thunder
Up to the polarization mismatch loss coefficient of signal, it is circular polarisation to often interfere with signal, and radar antenna is linear polarization, γj=0.5；FpjRoot
The space environment propagated according to signal between jammer and radar calculates,AjIt is signal between jammer and radar
The path loss of spatial.
The interfering signal power P that the radar receiver obtained according to step S300 receivesrjScope,
The interfering signal power P of jammer transmittingjMinimum value PjminIt can be further represented as：I.e. when the interference letter of jammer transmitting
Number power be more than PjminWhen can realize effective interference.
Dimensional energy relation between the jammer, radar and the target three that are reflected from interference inequality：
(1) it is big to suppress jamming power needed for high powered radar, for radar, increases equivalent radar power PtGtCan be with
Improve its antijamming capability；For interference, increase equivalent jamming power PjGjThe validity to radar compacting can be improved；
(2) the specular cross-section σ screened is in interior change in a big way, required effective jamming power PjWith
σ increases and increased；And σ is in smaller range when changing, required effective jamming power PjConstant, this is due to radar receiver
The jamming power of reception is at least greater than radar receiver internal noise power certain multiple, i.e. Prj≥mPn；
(3) when implementing secondary lobe interference, bias angle theta of the radar antenna on jammer directionjLarger, radar is in jammer direction
Antenna gain Gt(θj) smaller, now required equivalent jamming power PjGjIt is larger；
(4) when implementing major lobe suppression, bias angle theta of the radar antenna on jammer directionjSmaller, radar is in jammer direction
Antenna gain Gt(θj) larger, now required equivalent jamming power PjGjIt is smaller；So from the point of view of power is saved, do
It is more favourable in target to disturb machine configuration；
(5) blanket factor KjBigger, required equivalent jamming power PjGjIt is bigger；
(6) the minimum compacting distance R of radar can be calculated using dichotomyjPmin, according to formula Prj/Prs>=0 can calculate thunder
Up to maximum exposure distance RiEmax, in exposed region, radar range RtLess than RiEmax, interference can not cover in target echo,
So that target exposure outside, is easily scouted by enemy radar；In confusion region is disturbed, RiEmax≤Rt≤RjPmin, consider interference mould
The necessary being in area is pasted, the estimated range of stem profile model can be obviously reduced, can avoid to the excessive of jammer power demand
Improve, to cause unnecessary energy dissipation；In blanketed zone, Rt≥RjPmin, the interference signal that enemy radar receives can
Target echo signal is covered in, so that target is not easy to be found by enemy radar, plays a part of protecting one's own side's target.
Because loss of the signal on propagation path is relevant with signal propagation distance, dichotomy, iterative method, newton can be used
The mathematical methods such as method calculate minimum compacting distance and maximum display distance.
The decay that the present invention is propagated signal space by considering environmental factor, and this decay reflection is launched to signal
On propagation factor in the estimation procedure of power, and then it can more accurately obtain being used to suppress interference under effective disturbed condition
Jammer transmission signal power.Path loss is considered in the interference signal transmission power estimation procedure of the present invention, relative to
The situation of path loss is not considered, and radar effective jamming area scope expands, and stem profile model and interference confusion region scope are all corresponding
Reduce, illustrate that path loss be can not ignore to the influence for disturbing confusion region.Radar is believed because the present invention considers environmental factor
The influence of number spatial, makes the estimation of jamming power more accurate, while add the calculating of propagation factor so that caused
Interference signal precision is higher, more true to nature, while interfering signal power precision is improved, also improve interference effect and interference into
Work(probability.
Described above is only presently preferred embodiments of the present invention, not does any formal limitation to the present invention, although this
Invention is disclosed above with preferred embodiment, but is not limited to the present invention, any person skilled in the art,
Do not depart from the range of technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to equivalent
The equivalent embodiment of change, as long as being the content without departing from technical solution of the present invention, the technical spirit according to the present invention is to the above
Any simple modification, equivalent change and modification that embodiment is made, in the range of still falling within technical solution of the present invention.
Claims (5)
1. compacting interference signal transmission power method of estimation, it is characterised in that comprise the following steps：Radar beam points to target,
Radar transmitter launches radar signal,
The transmission power estimating step of radar signal；Reconnaissance plane intercepts and captures radar signal, estimates the transmission power P of radar signalt：
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P in formularThe signal power received for reconnaissance plane, RrDistance between reconnaissance plane and radar, FprIt is radar signal in radar
Propagation factor between reconnaissance plane during spatial, Gt(θr) for reconnaissance plane investigate radar signal when radar antenna direction increase
Benefit, GrFor reconnaissance plane antenna gain, λ is radar signal wavelength；
Target echo power estimation step；Radar receiver receives target echo, estimates target echo power Prs：
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P in formulatFor the transmission power of radar signal, GtFor radar antenna alignment target when antenna gain, σ be target thunder
Up to sectional area, RtDistance between radar and target, FptFor propagation of the radar signal between radar and target during spatial
The factor；
The interfering signal power scope estimating step that radar receiver receives；What radar receiver received when producing expectation interference is dry
Disturb signal power PrjScope be：
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Wherein, KjThe blanket factor effectively disturbed for radar receiver input, PrsFor target echo power, Δ fjBelieve for interference
Number bandwidth, Δ frFor radar receiver bandwidth, PnFor radar receiver internal thermal noise power, m is jammer migration index；
The transmission power estimating step of the interference signal of jammer transmitting；The interfering signal power model received according to radar receiver
Enclose the transmission power P of estimated disturbance signalj：
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Wherein, RjDistance between jammer and radar, FpjIt is interference signal between jammer and radar during spatial
Propagation factor, GjThe potato masher antenna gain of antenna alignment radar, G when launching interference signal for jammert(θj) receive and do for radar
Disturb radar antenna gain during signal, γjFor the polarization mismatch loss coefficient of interference signal and radar signal.
2. compacting interference signal transmission power method of estimation as claimed in claim 1, it is characterised in that：Radar signal is in radar
Propagation factor during spatial between reconnaissance planeA in formularFor radar signal reconnaissance plane and radar it
Between spatial when path loss.
3. compacting interference signal transmission power method of estimation as claimed in claim 1, it is characterised in that：Radar signal is in radar
Propagation factor during spatial between targetA in formulatFor signal, space passes between radar and target
The path loss broadcast.
4. compacting interference signal transmission power method of estimation as claimed in claim 1, it is characterised in that：Interference signal is being disturbed
Propagation factor during spatial between machine and radarA in formulajFor signal between jammer and radar it is empty
Between the path loss propagated.
5. the compacting interference signal transmission power method of estimation as described in claim 1 or 2 or 3 or 4 or 5, its
It is characterised by：When producing effectively interference, the interfering signal power P of radar receiver receptionrjMinimum value beThe then interfering signal power P of jammer transmittingj's
Minimum value is：
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| CN108833025A (en) * | 2017-12-29 | 2018-11-16 | 西安电子科技大学 | The low interception performance appraisal procedure of spread spectrum radar communication integrated system |
| CN108833025B (en) * | 2017-12-29 | 2020-02-21 | 西安电子科技大学 | Low interception performance evaluation method of spread spectrum radar communication integrated system |
| CN109125895A (en) * | 2018-07-24 | 2019-01-04 | 南阳市中心医院 | A kind of Internal Medicine-Oncology drug delivery device and method |
| CN111142076A (en) * | 2020-01-06 | 2020-05-12 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Power control method for improving low interception performance of radar |
| CN111142076B (en) * | 2020-01-06 | 2023-09-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Power control method for improving radar low-interception performance |
| CN112230187A (en) * | 2020-09-08 | 2021-01-15 | 中国人民解放军海军航空大学青岛校区 | Penetration direction acquisition method for radar |
| CN112230187B (en) * | 2020-09-08 | 2023-02-21 | 中国人民解放军海军航空大学青岛校区 | Penetration direction acquisition method for radar |
| CN113203993A (en) * | 2021-04-30 | 2021-08-03 | 电子科技大学 | Self-adaptive multi-jammer cooperative interference suppression method for networking radar |
| CN117741590A (en) * | 2023-12-14 | 2024-03-22 | 武汉大学 | Distance interference confusion system and method |
| CN117741590B (en) * | 2023-12-14 | 2024-08-13 | 武汉大学 | Distance interference confusion system and method |
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