CN106970361A - The method of estimation of Dual-polarized single pulse radar target angle under disturbed condition - Google Patents
The method of estimation of Dual-polarized single pulse radar target angle under disturbed condition Download PDFInfo
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Abstract
The method of estimation of Dual-polarized single pulse radar target angle under disturbed condition, it is related to Radar ECM technical field, radar receiving antenna is changed to the reception of double polarization, and increase corresponding sum-difference network, receiving channel, form Dual-polarized single pulse radar, according to radar horizon polarize three passages and, gun parallax, trim output data, three passages of vertical polarization and, gun parallax, trim output data, estimate the polarization characteristic of composite interference, the polarization ratio of interference is brought into mathematical formulae to solve, eliminate coupling error of the interference signal to angle on target, estimate the real angle of target；It is simple and effective that the present invention provides one kind for confrontation main lobe composite interference, and is highly susceptible to the method for Project Realization；Present invention could apply in existing target radar, track and guidance radar, end-guidance radar, fire control radar, with important reality.
Description
Technical field
The present invention relates to Radar ECM technical field, more particularly, to Dual-polarized single pulse radar mesh under disturbed condition
Mark the method for estimation of angle.
Background technology
Known, monopulse radar angle measurement has been a kind of technology of relative maturity and has been widely used in high-precision tracking thunder
Up in system.However, when there is the close and different target of angle and noise jamming source simultaneously in radar main beam, mesh
Mark echo is flooded in time domain and frequency domain by the interference with certain bandwidth, and after conventional signal transacting, monopulse radar can not
Effective detection target, or mistake detection, tracking source, Monopulse estimation be output as physical space target and interference plus
Weight average, it is impossible to provide correct angle and indicate, and then destroy radar angular tracking system.When this major lobe suppression not only has
The interference effect of frequency domain compacting, it may have the interference effect of angle deception, we term it main lobe composite interference.For example, active
Radar decoy interference (towed radar active decoy, TRAD) is generally bigger than the amplitude of real goal echo-signal very
It is many, relation spatially is maintained a certain distance with target, target and bait interference can not be differentiated in the range of radar main beam,
Bait can be suppressed with Turnaround Noise and disturbed, and greatly destroy monopulse radar to the accurate of the angle measurement of real goal and tracking
Degree.
At present, monopulse radar has several counterchecks to conventional major lobe suppression, but does not have to composite interference in main lobe
There is good anti-interference method.Existing radar resists general major lobe suppression can be with：(1) radar transmission power is improved, takes and " burns
Wear pattern ", electronic interferences is failed on certain distance.Burn-through range is proportional to the RCS of target fourth root, typically goes out
Present to be immediated vicinity from radar, this causes radar long-term work in disturbed state.(2) Range resolution of radar is improved
Power, using the transmitted signal bandwidth of more than 100M radar, makes the high resolution range power of radar reach the rank of rice, it is intended to from away from
Target and interference source are differentiated from.This method is that a Single Point Source interference effect is relatively good to interference source in main lobe,
But be otiose to main lobe composite interference.Because main lobe composite interference is entirely being covered with target time in range
Ripple, rather than the only range cell coverage goal echo where target, even if improving resolving power, other resolution cells it is dry
Disturb signal still to exist, so that can not be apart from upper resolution target and interference；(3) radar angular resolving power is improved, using space
Power estimation technology, makes radar angular resolving power reach the 1/2 of beam angle, and target and interference source are differentiated in angle.
But actually spatial spectral estimation algorithm requires very high to signal to noise ratio, operand is very big, is difficult to realize in engineering, composite interference
In noise jamming composition after can raise noise of radar receiver level, reduce signal to noise ratio so that the property of Estimation of Spatial Spectrum technology
It can be greatly lowered.(4) direct polarization filtering means are used, polarization filtering is carried out with passage, poor passage respectively pair and suppresses interference
Signal, then filtered signal is subjected to Monopulse estimation processing.But it is due to the presence of residual interference signal after filtering so that
Angular metric measured value is constantly present certain deviation, in addition, filtering is possible to that signal to noise ratio can be reduced, follow-up detection band is disappeared
Pole influences.
The content of the invention
In order to overcome the shortcomings of in background technology, the invention discloses Dual-polarized single pulse radar target angle under disturbed condition
The method of estimation of degree.
In order to realize the goal of the invention, the present invention is adopted the following technical scheme that：
The method of estimation of Dual-polarized single pulse radar target angle, specifically includes following steps under disturbed condition：
(1) monopulse radar, is changed to single polarization transmitting, reception of double polarization working method：
The reception of double polarization working method is all dual-polarized per exporting all the way for four quadrants of antenna, per defeated all the way
Go out including horizontal polarization and vertical polarization two-way, each quadrant has two-way output, four quadrants have 8 tunnel output signals, specifically
For：
The vertical polarization output A on A roadsv, horizontal polarization output Ah；
The vertical polarization output B on B roadsv, horizontal polarization output Bh；
The vertical polarization output C on C roadsv, horizontal polarization output Ch；
The vertical polarization output D on D roadsv, horizontal polarization output Dh；
8 tunnel output signals of aforementioned four quadrant are subjected to linear combinations, constitute six roads and, difference signal, including：Level pole
Change and signal Σh, horizontal polarization gun parallax signal deltah,A, horizontal polarization trim signal deltah,E, the sum of vertical polarization
Signal Σv, vertical polarization gun parallax signal deltav,A, vertical polarization trim signal deltav,E；
Above-mentioned six road and, the relation of 8 tunnel output signals of difference signal and A, B, C, D four-quadrant, be expressed as follows：
Σv=Av+Bv+Cv+Dv
Σh=Ah+Bh+Ch+Dh
Δv,A=(Av+Cv)-(Bv+Dv)
Δv,E=(Av+Bv)-(Cv+Dv)
Σh,A=(Ah+Ch)-(Bh+Dh)
Δh,E=(Ah+Bh)-(Ch+Dh)
(2), basis and the output signal of passage, calculate the polarization ratio of composite interference signal：
In the range of radar main beam, while when there is the different target of angle and interference source, and passage output signal
Echo signal and interference signal are contained, therefore, the signal of vertical polarization and passage, horizontal polarization and passage is as follows：
Σv=ΣTv+ΣIv
Σh=ΣTh+ΣIh；
Because interfering signal power is strong, echo signal is disturbed signal and flooded, and interference and echo signal power ratio disturb letter
Number power is more than 15dB, i.e. ΣTV<<ΣIV, ΣTh<<ΣIh, therefore main the hanging down with interference signal of output of vertical polarization passage
Based on straight polarization components, the output of horizontal polarization passage is main based on the horizontal polarized components of interference signal：
Σv≈ΣIv
Σh≈ΣIh
The polarization characteristic of interference signal is polarization ratio, with horizontal polarization and passage, vertical polarization and passage export number
According to Σh(t),Σv(t), obtain：
According to above-mentioned formula, the polarization ratio of interference signal carries out polarization using the echo-signal in the two POLARIZATION CHANNELs and estimated
Meter is obtained, and then the polarization ratio estimate result to different distance/frequency cells takes average；
(3) pre-processed with passage polarization filtering, distance/speed resolution cell of search target and interference aliasing：
The interference polarization vector estimated according to step (2) is [cos γ sin γ ejφ]T, based on rectangular projection criterion, if
AF panel polarisation filter is counted, filter vector H is met
H=[sin γ cos γ e-jφ]T
There are two and passage (Σ of target echo signal and interference signal to aliasingv,Σh) polarization filtering is carried out, obtain one
Individual pretreated and signal ΣPF：
Two and passage after filtering after, interference signal is suppressed significantly, and is detected according to filtered data, is searched for
Distance/speed resolution cell where target and interference aliasing is found, and the distance/speed resolution cell is labeled as Ω, and
By 6 tunnel primary signals where the Ω units, non-filtered treated signal extraction comes out, and obtains horizontal polarization and vertical pole
Change passage is exported and signal Σv(Ω),ΣhThe gun parallax signal delta of (Ω), horizontal polarization and the output of vertical polarization passagev,A
(Ω),Δh,AThe trim signal delta of (Ω), horizontal polarization and the output of vertical polarization passagev,E(Ω),Δh,E(Ω)；
(4) angular estimation method is decoupled using dual polarization：
Distance/speed resolution cell of aliasing is occurred according to target and interference, by two-way and signal Σv(Ω),Σh(Ω),
The gun parallax signal delta of horizontal polarization and vertical polarizationv,A(Ω),Δh,A(Ω), and interference polarization substitute into following public affairs than p
Formula, it is possible to remove the angle measurement deviation that interference is introduced, the azimuth angle theta of real goal is directly estimated under interference environmentT,A
(5), exported according to horizontal polarization and vertical polarization passage and signal Σv(Ω),Σh(Ω), horizontal polarization and hang down
The trim signal delta directly polarizedv,E,Δh,E, and interference polarization is than p, the following formula of substitution, it is possible to remove interference and introduce
Angle measurement deviation, the angle of pitch of real goal is directly estimated under interference environment：
Subscript v tables in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (1)
Show vertical polarization, h represents horizontal polarization, and A represents azimuth, and E represents the angle of pitch..
Subscript, T in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (2)
Target is represented, I represents interference, ΣTvRepresent the perpendicular polarisation components of target, ΣIvRepresent the perpendicular polarisation components of interference signal.
ΣThRepresent the horizontal polarized components of target, ΣIhRepresent the horizontal polarized components of interference signal.
T is in formula in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (2)
Time/frequency mark, different t represents different distance/speed units,.
K is pulse in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (4)
The angle of radar differentiates the slope of curve, is known quantity.Subscript A represents azimuth.
K is pulse in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (5)
The angle of radar differentiates the slope of curve, is known quantity；Footmark E represents the angle of pitch.
By adopting the above-described technical solution, the present invention has the advantages that：
1st, under disturbed condition of the present invention Dual-polarized single pulse radar target angle method of estimation, by radar antenna
Dual polarized antenna is improved to by single-polarized antenna, Monopulse radar receiver is improved, increases sum-difference network, horizontal polarization three is extracted
Individual multi-channel output signal, three multi-channel output signals of vertical polarization, combining target, the polarization characteristic measurement of interference, solve mathematics
Equation, eliminates interference signal to the coupling error of angle on target, estimates the real angle of target, for confrontation main lobe composite interference
It is simple and effective there is provided one kind, and it is highly susceptible to the method for Project Realization；Present invention could apply to existing Target indication thunder
Reach, in track and guidance radar, end-guidance radar, fire control radar, have important practical significance.
2nd, conventional single-pulse radar antenna is generally vertical polarization or horizontal polarization, and transmitting and the signal received are list
One polarized signal；In practice, target echo and the existing perpendicular polarisation components of main lobe composite interference signal, there is horizontal polarization point again
Amount, single polarization transmitting is changed to by radar, and reception of double polarization working method can receive the horizontal polarized components of echo-signal simultaneously
And perpendicular polarisation components.
Brief description of the drawings
Fig. 1 is that the Dual-polarized single pulse radar antenna four-quadrant after the present invention is improved constitutes schematic diagram；
Fig. 2 is the Dual-polarized single pulse radar receiver system composition structure chart after the present invention is improved；
Fig. 3 is Dual-polarized single pulse radar target angle measurement procedure figure under main lobe composite interference；
Fig. 4 is the time domain distribution of monopulse radar and passage (H+V) reception signal under main lobe composite interference；
Fig. 5 is the frequency domain distribution of monopulse radar and passage (H+V) reception signal under the conditions of main lobe composite interference；
Fig. 6 is the testing result of the Range resolution unit of target and interference aliasing after being pre-processed with passage polarization filtering；
Fig. 7 is the testing result of the speed resolution cell of target and interference aliasing after being pre-processed with passage polarization filtering；
Fig. 8 is the real angle where target and interference source；
Fig. 9 is conventional single-pulse radar target angle estimated result under the conditions of main lobe composite interference；
Figure 10 is Dual-polarized single pulse radar target angle estimated result (representative value ISR=under the conditions of main lobe composite interference
20dB, 15dB)；
Figure 11 estimates performance with receiver noise for Dual-polarized single pulse radar target angle under the conditions of main lobe composite interference
The change of coefficient；
Figure 12 is (polarization ratio evaluated error) Dual-polarized single pulse radar target angle under different polarization estimate deflection conditions
Estimate performance.
Embodiment
Explanation that can be detailed by the following examples is of the invention, and the open purpose of the present invention is intended to protect model of the present invention
Enclose all interior technological improvements.
With reference to the method for estimation of Dual-polarized single pulse radar target angle under accompanying drawing 1-12 disturbed conditions, specifically include following
Step：
(1) monopulse radar, is changed to single polarization transmitting, reception of double polarization working method：
Radar receiving antenna is changed to the reception of double polarization and increases corresponding sum-difference network, receiving channel, dual polarization is formed
Monopulse radar, the reception of double polarization working method for antenna four quadrants per export all the way be all it is dual-polarized, it is each
Road output includes horizontal polarization and vertical polarization two-way, and each quadrant has two-way output, and four quadrants have 8 tunnel output signals,
Specially：
The vertical polarization output A on A roadsv, horizontal polarization output Ah；
The vertical polarization output B on B roadsv, horizontal polarization output Bh；
The vertical polarization output C on C roadsv, horizontal polarization output Ch；
The vertical polarization output D on D roadsv, horizontal polarization output Dh；
8 tunnel output signals of aforementioned four quadrant are subjected to linear combinations, constitute six roads and, difference signal, including：Level pole
Change and signal Σh, horizontal polarization gun parallax signal deltah,A, horizontal polarization trim signal deltah,E, the sum of vertical polarization
Signal Σv, vertical polarization gun parallax signal deltav,A, vertical polarization trim signal deltav,E；
Above-mentioned six road and, the relation of 8 tunnel output signals of difference signal and A, B, C, D four-quadrant, be expressed as follows：
Σv=Av+Bv+Cv+Dv
Σh=Ah+Bh+Ch+Dh
Δv,A=(Av+Cv)-(Bv+Dv)
Δv,E=(Av+Bv)-(Cv+Dv)
Σh,A=(Ah+Ch)-(Bh+Dh)
Δh,E=(Ah+Bh)-(Ch+Dh)
(2), basis and the output signal of passage, calculate the polarization ratio of composite interference signal：
In the range of radar main beam, while when there is the different target of angle and interference source, and passage output signal
Echo signal and interference signal are contained, therefore, the signal of vertical polarization and passage, horizontal polarization and passage is as follows：
Σv=ΣTv+ΣIv
Σh=ΣTh+ΣIh；
Because interfering signal power is strong, echo signal is disturbed signal and flooded, and interference and echo signal power ratio disturb letter
Number power is more than 15dB, i.e. ΣTV<<ΣIV, ΣTh<<ΣIh, therefore main the hanging down with interference signal of output of vertical polarization passage
Based on straight polarization components, the output of horizontal polarization passage is main based on the horizontal polarized components of interference signal：
Σv≈ΣIv
Σh≈ΣIh
The polarization characteristic of interference signal is polarization ratio, with horizontal polarization and passage, vertical polarization and passage export number
According to Σh(t),Σv(t), obtain：
According to above-mentioned formula, the polarization ratio of interference signal carries out polarization using the echo-signal in the two POLARIZATION CHANNELs and estimated
Meter is obtained, and then the polarization ratio estimate result to different distance/frequency cells takes average；
(3) pre-processed with passage polarization filtering, distance/speed resolution cell of search target and interference aliasing：
The interference polarization vector estimated according to step (2) is [cos γ sin γ ejφ]T, based on rectangular projection criterion, if
AF panel polarisation filter is counted, filter vector H is met
H=[sin γ cos γ e-jφ]T
There are two and passage (Σ of target echo signal and interference signal to aliasingv,Σh) polarization filtering is carried out, obtain one
Individual pretreated and signal ΣPF：
Two and passage after filtering after, interference signal is suppressed significantly, and is detected according to filtered data, is searched for
Distance/speed resolution cell where target and interference aliasing is found, and the distance/speed resolution cell is labeled as Ω, and
By 6 tunnel primary signals where the Ω units, non-filtered treated signal extraction comes out, and obtains horizontal polarization and vertical pole
Change passage is exported and signal Σv(Ω),ΣhThe gun parallax signal delta of (Ω), horizontal polarization and the output of vertical polarization passagev,A
(Ω),Δh,AThe trim signal delta of (Ω), horizontal polarization and the output of vertical polarization passagev,E(Ω),Δh,E(Ω)；
(4) angular estimation method is decoupled using dual polarization：
Distance/speed resolution cell of aliasing is occurred according to target and interference, by two-way and signal Σv(Ω),Σh(Ω),
The gun parallax signal delta of horizontal polarization and vertical polarizationv,A(Ω),Δh,A(Ω), and interference polarization substitute into following public affairs than p
Formula, it is possible to remove the angle measurement deviation that interference is introduced, the azimuth angle theta of real goal is directly estimated under interference environmentT,A
(5), exported according to horizontal polarization and vertical polarization passage and signal Σv(Ω),Σh(Ω), horizontal polarization and hang down
The trim signal delta directly polarizedv,E,Δh,E, and interference polarization is than p, the following formula of substitution, it is possible to remove interference and introduce
Angle measurement deviation, the angle of pitch of real goal is directly estimated under interference environment：
Subscript v tables in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (1)
Show vertical polarization, h represents horizontal polarization, and A represents azimuth, and E represents the angle of pitch..
Subscript, T in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (2)
Target is represented, I represents interference, ΣTvRepresent the perpendicular polarisation components of target, ΣIvRepresent the perpendicular polarisation components of interference signal.
ΣThRepresent the horizontal polarized components of target, ΣIhRepresent the horizontal polarized components of interference signal.
T is in formula in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (2)
Time/frequency mark, different t represents different distance/speed units,.
K is pulse in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (4)
The angle of radar differentiates the slope of curve, is known quantity.Subscript A represents azimuth.
K is pulse in the method for estimation of Dual-polarized single pulse radar target angle under described disturbed condition, step (5)
The angle of radar differentiates the slope of curve, is known quantity；Footmark E represents the angle of pitch.
Implement the method for estimation of Dual-polarized single pulse radar target angle under disturbed condition of the present invention, Fig. 1 is this
Dual-polarized single pulse radar antenna four-quadrant after invention is improved constitutes schematic diagram.Whole antenna is flat board gap array, is had
Tetra- quadrants of A, B, C, D are constituted, and the antenna element of each quadrant is dual-polarized, including horizontal polarization and vertical polarization two-way.
Horizontal polarization is operated in during the antenna transmission signal, horizontal polarization echo and vertical polarization echo can be received during reception simultaneously.
Fig. 2 is the Dual-polarized single pulse radar receiver system composition structure chart after the present invention is improved.
It can be seen that, each quadrant has the output of two-way polarized signal, and four quadrants just have 8 tunnel output signals：
The vertical polarization output A on A roadsv, horizontal polarization output Ah；
The vertical polarization output B on B roadsv, horizontal polarization output Bh；
The vertical polarization output C on C roadsv, horizontal polarization output Ch；
The vertical polarization output D on D roadsv, horizontal polarization output Dh。
This 8 tunnel output signal is carried out by two sum-difference networks (horizontal polarization sum-difference network, vertical polarization sum-difference network)
Linear combination, may be constructed six road signals, including：Horizontal polarization and signal Σh, horizontal polarization gun parallax signal deltah,A、
The trim signal delta of horizontal polarizationh,E, vertical polarization and signal Σv, vertical polarization gun parallax signal deltav,A, vertical pole
The trim signal delta of changev,E.Subscript v represents vertical polarization, and h represents horizontal polarization, and A represents azimuth, and E represents the angle of pitch.
Fig. 3 is Dual-polarized single pulse radar target angle measurement procedure figure under main lobe composite interference.According to two and poor net
The horizontal polarization and channel signal and vertical polarization and signal of network output, calculate the polarization ratio of composite interference signal, calculate
Polarization filtering vector, is pre-processed, interference signal can be significantly inhibited after filtering, greatly to the conscientious polarization filtering of two-way and passage
Amplitude improves signal interference ratio, finds the distance/speed resolution cell at the place of target and interference aliasing, determines after the unit, to six
The distance of road signal/speed resolution cell decouples angular estimation method using dual polarization, estimates the orientation and the angle of pitch of target.
Fig. 4 is the time domain distribution that monopulse radar and passage (H+V) receive signal under main lobe composite interference, now interference and
Echo signal power ratio is 15dB, and because jam-to-signal echo signal is big 15 decibels, now echo signal is pressed completely,
Echo signal can not be detected in time domain.
Fig. 5 is the frequency domain distribution of monopulse radar and passage (H+V) reception signal under the conditions of main lobe composite interference.Now do
It is 15dB to disturb with echo signal power ratio, and because jam-to-signal echo signal is big 15 decibels, the frequency spectrum of interference signal covers completely
Frequency where lid target, now echo signal be pressed completely, echo signal can not be detected in frequency domain.
Fig. 6, Fig. 7 are the inspections of distance/speed resolution cell of target and interference aliasing after being pre-processed with passage polarization filtering
Survey result.It can be seen that, and signal and noise power ratio are greatly improved after passage polarization filtering pretreatment, can be substantially
The general residing distance of target and speed resolution cell are told, is found out from figure, target is approximately at 0.1 × 10-3Position when
On the position of domain, the unit is found in 0.2KHz frequency location, automatic search, for next step processing.
Fig. 8 gives the actual position where target and interference, and the orientation and the angle of pitch of target are all -1 degree, the side of interference
Position and the angle of pitch are 1.5 degree, and beam angle is 6 degree.
Fig. 9 is conventional single-pulse radar target angle estimated result under the conditions of main lobe composite interference.In main lobe composite interference
Under, interference signal causes radar angle measurement to produce very big error, because interfering signal power is stronger than echo signal power 20 decibels, this
When conventional single-pulse processing angle measurement output it is most of be interference signal angle, so the orientation and the angle of pitch of angle measurement output are general
In 1.5 degree, 1.5 degree of scopes.
Figure 10 is Dual-polarized single pulse radar target angle estimated result under the conditions of main lobe composite interference, now interference signal
Power ratio ISR=20dB, radio-frequency channel itself signal to noise ratio snr=20dB, it can be seen that according to the New Method for Processing of patent can be with
The angle where target is more accurately estimated under disturbed condition.
Figure 11 estimates performance with receiver noise for Dual-polarized single pulse radar target angle under the conditions of main lobe composite interference
The change of coefficient.It can be seen that, signal to noise ratio is higher, and the estimation performance of new method is better, it is meant that receiver signal to noise ratio itself is got over
Height, noise coefficient is lower, and the angle estimation performance of radar target is higher.
Figure 12 is Dual-polarized single pulse radar target angle estimation performance under different polarization estimate deflection conditions.Assuming that interference
Polarization ratio evaluated error between 0-0.2, phase estimation error be 15 degree, the angular estimation error of radar target is with polarization ratio
The increase of evaluated error and increase, this explanation interference polarization estimate error it is smaller, the angle estimation error of radar target is smaller.
Claims (6)
1. the method for estimation of Dual-polarized single pulse radar target angle under disturbed condition, it is characterized in that：Specifically include following steps：
(1) monopulse radar, is changed to single polarization transmitting, reception of double polarization working method：
The reception of double polarization working method is all dual-polarized per exporting all the way for four quadrants of antenna, per output bag all the way
Horizontal polarization and vertical polarization two-way are included, each quadrant has two-way output, and four quadrants have 8 tunnel output signals, be specially：
The vertical polarization output A on A roadsv, horizontal polarization output Ah；
The vertical polarization output B on B roadsv, horizontal polarization output Bh；
The vertical polarization output C on C roadsv, horizontal polarization output Ch；
The vertical polarization output D on D roadsv, horizontal polarization output Dh；
8 tunnel output signals of aforementioned four quadrant are subjected to linear combinations, constitute six roads and, difference signal, including：Horizontal polarization
With signal Σh, horizontal polarization gun parallax signal deltah,A, horizontal polarization trim signal deltah,E, vertical polarization and signal
Σv, vertical polarization gun parallax signal deltav,A, vertical polarization trim signal deltav,E；
Above-mentioned six road and, the relation of 8 tunnel output signals of difference signal and A, B, C, D four-quadrant, be expressed as follows：
Σv=Av+Bv+Cv+Dv
Σh=Ah+Bh+Ch+Dh
Δv,A=(Av+Cv)-(Bv+Dv)
Δv,E=(Av+Bv)-(Cv+Dv)
Σh,A=(Ah+Ch)-(Bh+Dh)
Δh,E=(Ah+Bh)-(Ch+Dh)
(2), basis and the output signal of passage, calculate the polarization ratio of composite interference signal：
In the range of radar main beam, while when there is the different target of angle and interference source, and the output signal of passage is included
Echo signal and interference signal, therefore, the signal of vertical polarization and passage, horizontal polarization and passage is as follows：
Σv=ΣTv+ΣIv
Σh=ΣTh+ΣIh；
Because interfering signal power is strong, echo signal is disturbed signal and flooded, interference and echo signal power ratio interference signal work(
Rate is more than 15dB, i.e. ΣTV<<ΣIV, ΣTh<<ΣIh, therefore the main vertical pole with interference signal of output of vertical polarization passage
Change based on component, the output of horizontal polarization passage is main based on the horizontal polarized components of interference signal：
Σv≈ΣIv
Σh≈ΣIh
The polarization characteristic of interference signal is polarization ratio, with horizontal polarization and passage, vertical polarization and passage output data Σh
(t),Σv(t), obtain：
According to above-mentioned formula, the polarization ratio of interference signal carries out polarization estimate using the echo-signal in the two POLARIZATION CHANNELs and obtained
Arrive, then the polarization ratio estimate result to different distance/frequency cells takes average；(3) pre-processed with passage polarization filtering,
Search for distance/speed resolution cell of target and interference aliasing：
The interference polarization vector estimated according to step (2) is [cos γ sin γ ejφ]T, based on rectangular projection criterion, design is dry
Suppression polarisation filter is disturbed, filter vector H is met
H=[sin γ cos γ e-jφ]T
There are two and passage (Σ of target echo signal and interference signal to aliasingv,Σh) polarization filtering is carried out, obtain one in advance
After processing and signal ΣPF：
Two and passage after filtering after, interference signal is suppressed significantly, and is detected that search is found according to filtered data
Distance/speed resolution cell where target and interference aliasing, and the distance/speed resolution cell is labeled as Ω, and should
6 tunnel primary signals where Ω units, non-filtered treated signal extraction comes out, and obtains horizontal polarization and vertical polarization is logical
Road is exported and signal Σv(Ω),ΣhThe gun parallax signal delta of (Ω), horizontal polarization and the output of vertical polarization passagev,A(Ω),
Δh,AThe trim signal delta of (Ω), horizontal polarization and the output of vertical polarization passagev,E(Ω),Δh,E(Ω)；
(4) angular estimation method is decoupled using dual polarization：
Distance/speed resolution cell of aliasing is occurred according to target and interference, by two-way and signal Σv(Ω),Σh(Ω), level
Polarization and the gun parallax signal delta of vertical polarizationv,A(Ω),Δh,A(Ω), and interference polarization substitute into following formula, just than p
The angle measurement deviation that interference is introduced can be removed, the azimuth angle theta of real goal is directly estimated under interference environmentT,A
(5), exported according to horizontal polarization and vertical polarization passage and signal Σv(Ω),Σh(Ω), horizontal polarization and vertical pole
The trim signal delta of changev,E,Δh,E, and interference polarization is than p, the following formula of substitution, it is possible to remove the survey that interference is introduced
Angular displacement, directly estimates the angle of pitch of real goal under interference environment：
2. the method for estimation of Dual-polarized single pulse radar target angle under disturbed condition according to claim 1, its feature
It is：Subscript v represents vertical polarization in step (1), and h represents horizontal polarization, and A represents azimuth, and E represents the angle of pitch.
3. the method for estimation of Dual-polarized single pulse radar target angle under disturbed condition according to claim 1, its feature
It is：Subscript in step (2), T represents target, and I represents interference, ΣTvRepresent the perpendicular polarisation components of target, ΣIvRepresent interference
The perpendicular polarisation components of signal.ΣThRepresent the horizontal polarized components of target, ΣIhRepresent the horizontal polarized components of interference signal.
4. the method for estimation of Dual-polarized single pulse radar target angle under disturbed condition according to claim 1, its feature
It is：T is time/frequency mark in formula in step (2), and different t represents different distance/speed units.
5. the method for estimation of Dual-polarized single pulse radar target angle under disturbed condition according to claim 1, its feature
It is：K differentiates the slope of curve for the angle of monopulse radar in step (4), is known quantity.Subscript A represents azimuth.
6. the method for estimation of Dual-polarized single pulse radar target angle under disturbed condition according to claim 1, its feature
It is：K differentiates the slope of curve for the angle of monopulse radar in step (5), is known quantity；Footmark E represents the angle of pitch.
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