CN104849710A - Digital polarization agility radar - Google Patents
Digital polarization agility radar Download PDFInfo
- Publication number
- CN104849710A CN104849710A CN201410847387.4A CN201410847387A CN104849710A CN 104849710 A CN104849710 A CN 104849710A CN 201410847387 A CN201410847387 A CN 201410847387A CN 104849710 A CN104849710 A CN 104849710A
- Authority
- CN
- China
- Prior art keywords
- polarization
- road
- channel
- signal transacting
- radar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention relates to the field of radars and especially relates to a digital polarization agility radar. The invention is suitable for radars of any frequency bands including traditional paraboloid radars and phased array radars. The digital polarization agility radar includes an H/V double-channel transmitter, a shift network, a dual polarized antenna, a signal processing unit and an admitting terminal, wherein the H/V double-channel transmitter generates required double channel transmitting signals under signal processing time sequence control; the shift network realizes H channel transmitting phase adjustment and V channel transmitting phase adjustment under signal processing analysis control. Polarization agility of the transmitting signals is realized and polarization agility of interpulse transmitting signals is realized. According to the invention, systematic anti-interference effect can be improved effectively and polarization agility time is reduced. At the same time, the cost is low. Besides, online real time measurement and correction are adopted, so that polarization agility precision is guaranteed effectively.
Description
Technical field
The present invention relates to field of radar, spy relates to a kind of digital polar agile radar, is applicable to any frequency range radar, comprises traditional parabola radar, phased-array radar.
Background technology
Polarization-agile technology is an Application comparison technology widely in radar detection, jamproof system in recent years, and various new method and theory constantly occur, oneself becomes a kind of effective technology means that radar system improves detection and antijamming capability.The polarization of ele of radar emission is consistent with target polarization characteristic, and receiving polarization polarizes with target echo and mates, and will obtain best detection performance.Equally, to anti-interference middle use Variable Polarization Antenna, also can be autonomous by carrying out anti-interference with the polarization orthogonal of interference wave.In a word, select the different polarized states of transmitting-receiving, can reduce and receive unnecessary echoed signal, and the echo of specific objective is strengthened, improve signal interference ratio, be convenient to detect specific objective and to anti-interference, promote detections of radar Small object ability and the sub-interference performance of the modern forceful electric power of antagonism.
There is following problem in traditional simulation prompt change technology that polarizes, and one, polarization is prompt becomes limitednumber, two, polarization switching time is long, three, cost of equipment is high.
Summary of the invention
For the deficiency of background technology, digital polar agile radar of the present invention, comprises H/V road dual-channel transmitter, shifts to network, dual polarized antenna, signal transacting, calibration source, admission terminal; Wherein, described H/V road dual-channel transmitter, under signal transacting sequential control, the binary channels required for generation transmits; Describedly shift to network, under signal processing analysis controls, realize the transmitter, phase adjustment of H and V road, the polarization victory realizing transmitting becomes, and the polarization victory that can realize transmitting between arteries and veins becomes.The present invention effectively can improve system rejection to disturbance effect, reduce polarization switching time, and cost is low simultaneously, and adopts the method for On-line sampling system and correction, effectively ensure that polarization is prompt and becomes precision.
Technical scheme of the present invention is:
A kind of digital polar agile radar, comprise H/V road dual-channel transmitter, phase shift network, dual polarized antenna, calibration source, signal transacting, admission terminal, wherein H road, V road two-way transmitter characteristic is consistent, H road, V road two-way receiver channel characteristic is consistent, it is characterized in that: described H/V road dual-channel transmitter is launched through dual polarized antenna by after phase shifter under the control of signal transacting, polar transmitter wave direction space radiation required for formation, echoed signal receives through dual polarized antenna, in phase shift network, circulator enters H/V road two-channel receiver respectively, through amplifying, mixing, intermediate-freuqncy signal is formed after filtering, by the collection of signal transacting settling signal, after filtering extraction, carry out binary channels polarization weighting process and form target information, admission terminal is sent to show.Calibration source completes and corrects transceiver channel amplitude, phase equalization, ensures that polarization is prompt and becomes precision.
Digital polar agile radar as above, is characterized in that: described signal transacting calculates
signal transacting is again according to h
t, optcontrol the phase place of phase shifter, wherein " h
t, opt" be best transmitting polarization vector, " S " represent target scattering matrix, subscript "
*" represent conjugation, " T " representing matrix transposition, " h
r, opt" be best receiving polarization vector.
Digital polar agile radar as above, is characterized in that: described signal transacting adopts adaptive polarization interference cancellation algorithm, realizes interference cancellation by double-channel self-adapting weighting.
Digital polar agile radar as above, is characterized in that: the method antagonism active passive that described signal transacting adopts polarization to offset in conjunction with AMTI/AMTD disturbs
The invention has the beneficial effects as follows: can effectively tackle with principal subsidiary lobe interference frequently; The prompt change of polarization arbitrarily can be realized, reduce polarization switching time, promote anti-jamming effectiveness; System adopts digital form realization transmitting-receiving polarization to replace traditional simulation Polarization changer, and cost is low.Propose, adopt the mode of On-line sampling system and correction, effectively ensure that polarization precision.
Accompanying drawing explanation
Accompanying drawing 1 is principle of the invention block diagram.
Accompanying drawing 2 is principles of signal processing block diagram.
Accompanying drawing 3 is adaptive polarization interference cancellation algorithm principle block diagram.
Accompanying drawing 4 launches polarization theory diagram under jamming pattern.
Accompanying drawing 5 is online real time correction theory diagram.
Accompanying drawing 6 is that receiving polarization victory becomes anti-jamming effectiveness figure (before polarization).
Accompanying drawing 7 is that receiving polarization victory becomes anti-jamming effectiveness figure (after polarization).
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As accompanying drawing 1, H/V road of the present invention dual-channel transmitter, under signal transacting sequential control, transmits needed for generation system, and H road, V road two-way transmitter characteristic are consistent.By launching through dual polarized antenna after phase shifter under the control of signal transacting, the polar transmitter wave direction space radiation required for formation.Echoed signal receives through dual polarized antenna, in phase shift network, circulator enters H/V road two-channel receiver (H road, V road two-way receiver channel characteristic consistent) respectively, intermediate-freuqncy signal is formed after amplification, mixing, filtering, after the collection of signal transacting settling signal, filtering extraction, carry out binary channels polarization weighting process, form target information through processes such as AMTI/AMTD, send admission terminal to show.
As accompanying drawing 2, signal transacting of the present invention mainly comprises the functional module compositions such as adaptive interference cancellation/transmitter, phase calculation and control, AMTI/AMTD.Wherein adaptive interference cancellation/transmitter, phase calculation and control is its corn module, adopts adaptive polarization interference cancellation algorithm, realizes interference cancellation by double-channel self-adapting weighting; Transmitter, phase calculation and control module calculates optimum transmitting polarization mode, realizes shifting to network phase and controls, reach optimum transmitting polarization, promote target detection capabilities.The method adopting polarization to offset in conjunction with AMTI/AMTD effectively can resist active passive interference.
As accompanying drawing 3, adaptive polarization interference cancellation algorithm of the present invention, by the H road (x received
1(n)), V road (x
2(n)) signal carry out the polarizing circulation of weights (w) iterates calculating, and reach optimum when the cross polarization each other of receiving polarization and interference polarization, and when signal interference ratio is maximum, sends composite signal (y (n)), realize AF panel.
As accompanying drawing 4, launching polarization under jamming pattern of the present invention is after optimum reception polarization is determined (interference polarization offsets), target echo is polarized mate with receiving polarization as far as possible, thus obtain maximum target received power, finally realize the maximization of SINR (Signal to Interference plus Noise Ratio).Concrete transmitting polarization determination flow process is as follows:
Radar optimum reception polarization h under jamming pattern
r, optfor (h
jfor interference polarization vector, h
r, optreceiving polarization vector for the best):
h
r,opt Th
J＝0
Target echo polarization h
sby transmitting polarization vector h
tjointly determine with target scattering matrix S, namely
h
s＝Sh
t
So, h is defined as in radar receiving polarization
r, optafterwards, to ask echo reception power maximum, then echo polarization h
sshould with receiving polarization h
r, optcoupling, namely makes h
s th
r, opt(i.e. h
t ts
th
r, opt) get maximal value.
If the product vector of objective definition scattering matrix and optimum reception polarization is:
(|| θ ||=1), then the target received signal voltage coefficient determined by sending and receiving polarization is:
v
s＝h
r,opt TSh
t＝h
t Tθ
By the character of the inner product space | v
s|=| <h
t, θ
*>|≤|| h
t|| || θ
*|| (subscript " * " represents conjugation, " T " representing matrix transposition) is known, and if only if h
t=α θ
*time (α is complex constant), the signal power received is maximum.If constraint || h
t, opt||=1, then optimum transmit polarization vector h
t, optcan be defined as:
Namely the h mated with θ
tfor optimum transmit polarization.
Launch the polarization characteristic that polarization depends on target, adopt during general actual use and manually choose the optimization that highest priority carries out launching polarization.
As accompanying drawing 5, the present invention's online real time correction process is as follows, receive timing, calibration source signal generator produces correction signal under system sequence controls, directional coupler in phase shift network send H/V road two-channel receiver respectively, by signal transacting complete reception amplitude, phase place measurement and compensate; Launch timing, H/V road dual-channel transmitter is respectively under correction sequential control, produce transmit through the directional coupler shifted in network send launch correct receiver, the measurement of transmitter, phase is carried out, by controlling to shift to the correction that device phase place realizes transmitter, phase in phase shift net by signal transacting.In system practical work process, need to adopt the mode of correction of timing to carry out launching, receiving amplitude and phase correction according to system.
The prompt prompt precision that becomes of systems radiate polarization that becomes of polarization depends on systems radiate phase control precision, receiving polarization victory becomes precision and depends on amplitude, the phase control precision of Received signal strength, so the online amplitude in real time of the proposition of native system, phase correction realize high accuracy number to polarize the basis of prompt change system.
Accompanying drawing 6,7 is that receiving polarization victory becomes the aobvious figure of anti-jamming effectiveness radar P.Fig. 6 is for before reception polarization, and Fig. 7 is the effect after receiving polarization, as can be seen from the figure this Radar Anti co-channel interference successful.
Claims (4)
1. a digital polar agile radar, comprise H/V road dual-channel transmitter, phase shift network, dual polarized antenna, calibration source, signal transacting, admission terminal, wherein H road, V road two-way transmitter characteristic is consistent, H road, V road two-way receiver channel characteristic is consistent, it is characterized in that: described H/V road dual-channel transmitter is launched through dual polarized antenna by after phase shifter under the control of signal transacting, polar transmitter wave direction space radiation required for formation, echoed signal receives through dual polarized antenna, in phase shift network, circulator enters H/V road two-channel receiver respectively, through amplifying, mixing, intermediate-freuqncy signal is formed after filtering, by the collection of signal transacting settling signal, after filtering extraction, carry out binary channels polarization weighting process and form target information, admission terminal is sent to show, calibration source completes transceiver channel amplitude, phase equalization corrects, ensure that polarization is prompt and become precision.
2. digital polar agile radar as claimed in claim 1, is characterized in that: described signal transacting calculates
signal transacting is again according to h
t, optcontrol the phase place of phase shifter, wherein " h
t, opt" be best transmitting polarization vector, " S " represent target scattering matrix, subscript "
*" represent conjugation, " T " representing matrix transposition, " h
r, opt" be best receiving polarization vector.
3. digital polar agile radar as claimed in claim 1, is characterized in that: described signal transacting adopts adaptive polarization interference cancellation algorithm, realizes interference cancellation by double-channel self-adapting weighting.
4. digital polar agile radar as claimed in claim 1, is characterized in that: the method antagonism active passive that described signal transacting adopts polarization to offset in conjunction with AMTI/AMTD disturbs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410847387.4A CN104849710A (en) | 2014-12-31 | 2014-12-31 | Digital polarization agility radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410847387.4A CN104849710A (en) | 2014-12-31 | 2014-12-31 | Digital polarization agility radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104849710A true CN104849710A (en) | 2015-08-19 |
Family
ID=53849494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410847387.4A Pending CN104849710A (en) | 2014-12-31 | 2014-12-31 | Digital polarization agility radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104849710A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226876A (en) * | 2017-12-28 | 2018-06-29 | 北京融创远大网络科技有限公司 | A kind of intelligent vehicle-carried radar installations for reducing polarization loss |
| CN108363059A (en) * | 2017-12-28 | 2018-08-03 | 北京融创远大网络科技有限公司 | A kind of intelligent vehicle-carried radar installations reducing signal interference |
-
2014
- 2014-12-31 CN CN201410847387.4A patent/CN104849710A/en active Pending
Non-Patent Citations (5)
| Title |
|---|
| 刘德树: "《雷达反对抗的基本理论与技术》", 31 August 1989, 北京理工大学出版社 * |
| 宋立众 等: "一种极化和频率捷变主动雷达信号处理技术", 《南京理工大学学报(自然科学版)》 * |
| 施龙飞 等: "干扰背景下雷达最佳极化的分步估计方法", 《自然科学进展》 * |
| 纪斌 等: "相控阵雷达在线幅相校正", 《电讯技术》 * |
| 陈伯孝 等: "《现代雷达***分析与设计》", 30 September 2012, 西安电子科技大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226876A (en) * | 2017-12-28 | 2018-06-29 | 北京融创远大网络科技有限公司 | A kind of intelligent vehicle-carried radar installations for reducing polarization loss |
| CN108363059A (en) * | 2017-12-28 | 2018-08-03 | 北京融创远大网络科技有限公司 | A kind of intelligent vehicle-carried radar installations reducing signal interference |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Aubry et al. | MIMO radar beampattern design via PSL/ISL optimization | |
| CN102830387B (en) | Data preprocessing based covariance matrix orthogonalization wave-beam forming method | |
| CN101533091B (en) | Space-time two-dimensional narrow band barrage jamming method | |
| CN103885041A (en) | Self-adaption side lobe cancellation method based on recognition processing | |
| CN110146848B (en) | Frequency modulation continuous wave radar self-interference elimination method based on fractional order least mean square | |
| CN104391278A (en) | Radar anti-interference method by utilizing polarization cancellation | |
| CN109738856B (en) | Noise suppression Capon active target DOA estimation method based on time reversal | |
| CN101923157A (en) | Spaceborne dual-channel angle tracking calibration system and method | |
| EP3339883A1 (en) | A cognitive radar system | |
| CN110456314B (en) | Centralized MIMO radar waveform optimization method based on main lobe broadening | |
| Cuntz et al. | Field test: jamming the DLR adaptive antenna receiver | |
| CN104267383A (en) | Self-adaptive measuring device for polarization parameter of radar electromagnetic signal | |
| CN105812019A (en) | Adaptive null-steering beam bandwidth self-leakage signal suppression system and method | |
| US20060017604A1 (en) | Selective-sampling receiver | |
| CN103105614A (en) | Space and time domain joint anti-jamming method based on inertial navigation assisting | |
| CN106324602A (en) | MIMO sonar system | |
| CN106646420A (en) | Method for designing MIMO (Multiple-input multiple-output) radar transmitting direction diagram based on LFM (Linear Frequency Modulation) signals | |
| CN103728596A (en) | Method for inhibiting distributed interference of bi-static MIMO radar | |
| CN108828504A (en) | MIMO radar target direction method for quick estimating based on part waveform correlation | |
| CN104849710A (en) | Digital polarization agility radar | |
| WO2006078314A2 (en) | Selective-sampling receiver | |
| CN113970741A (en) | MIMO-SAR pulse-to-pulse phase optimization coding method, device, equipment and medium | |
| EP3757599A1 (en) | Fast spatial search using phased array antennas | |
| CN104868946A (en) | Adaptive weighted interference suppression method of subarray level mixed MIMO-phased array system | |
| CN104656065A (en) | Method for restraining sparse adaptive direct wave and noise wave of passive bistatic radar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |
|
| WD01 | Invention patent application deemed withdrawn after publication |