CN108896969A - A kind of anti-active decoy interference system and its method offseted based on polarization - Google Patents
A kind of anti-active decoy interference system and its method offseted based on polarization Download PDFInfo
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- CN108896969A CN108896969A CN201810803391.9A CN201810803391A CN108896969A CN 108896969 A CN108896969 A CN 108896969A CN 201810803391 A CN201810803391 A CN 201810803391A CN 108896969 A CN108896969 A CN 108896969A
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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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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
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- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a kind of anti-active decoy interference systems offseted based on polarization, including：Cross-polarized antennas receiving module, signal processing module and polarization offset output module.Anti- active decoy interference method, the specific steps are that：The signal of cross polarization receiving antenna module reception two orthogonal channels of radar；Signal processing module, which differentiates main polarization channel and auxiliary polarization channel and calculates polarization, offsets coefficient；Polarization, which offsets output module and carries out polarization, to be offseted output and offsets result S0(t)；So far, it realizes and bait signal is offseted.The present invention is in the case where radar is interfered by active decoy, utilize the polarization information of active decoy interference timing different and active decoy from the polarization information of real goal echo, system resolving polarization is received using cross-polarized antennas and offsets coefficient, bait signal is offset.
Description
Technical field
The present invention proposes a kind of anti-active decoy interference system and method, especially a kind of active based on resisting of offseting of polarization
Bait interference system and method.
Background technique
The interference of carrier-borne and outboard active decoy can be implemented to interfere from time domain and frequency domain to end-guidance radar simultaneously, influence end
Guidance radar obtains target echo signal, and then influences ranging angle measurement result, so that radar be made to lose the stabilization to real goal
Tracking, then track bait signal.
Existing anti-active decoy interference system and method are to increase the complexity of transmitting signal, are such as increased before emitting signal
Add shielding signal, frequency hopping, power management, the methods of phase code, these approaches increases the difficulties of emission system and reception system
Degree, reduces radar emission efficiency, and cannot cope with all active decoy jammers, therefore in many resource-constrained systems
It can not be applicable in.
Summary of the invention
The purpose of the present invention is to provide a kind of anti-active decoy interference systems and method offseted based on polarization, solve existing
With the presence of anti-active decoy interference system and method the problem of.
A kind of anti-active decoy interference system offseted based on polarization of the invention, including：Cross-polarized antennas receives mould
Block, signal processing module and polarization offset output module.
The function of the cross-polarized antennas receiving module is：Obtain the signal of two cross-polarized antennas receiving channels；
The function of signal processing module is：Main polarization channel and auxiliary polarization channel are differentiated, and calculates polarization accordingly and offsets
Coefficient；
Polarization offsets the function of output module：It offsets coefficient according to polarization the signal in two channels is offseted to obtain thunder
Up to echo-signal.
A kind of anti-active decoy interference method offseted based on polarization of the invention, the specific steps are that：
The signal of first step cross polarization receiving antenna module reception two orthogonal channels of radar
According to active decoy interference principle, active decoy interference is ahead of radar signal in time-domain, is more than in amplitude
Radar signal, thus according to receive signal amplitude scintillation change, intercept respectively two channel receiving signal amplitude drastic changes it is critical when
Bait signal S of the signal of period as two channel receptions before quarter1r(t), S2r(t).First cross polarization channel reception
Complete signal be S1c(t), the complete signal of the second cross polarization channel channel reception is S2c(t)。
Second step signal processing module, which differentiates main polarization channel and auxiliary polarization channel and calculates polarization, offsets coefficient
According to the bait signal S of two channel receptions1r(t) and S2r(t) power determines main polarization channel and auxiliary polarization
Channel, and calculate polarization and offset coefficient w：
WhereinWithFor the reception power in two channels, whenWhen, then first passage be main POLARIZATION CHANNEL, second
Channel is auxiliary POLARIZATION CHANNEL, assignment：
WhenWhen, then first passage is auxiliary POLARIZATION CHANNEL, and second channel is main POLARIZATION CHANNEL, assignment：
The formula that polarization offsets coefficient w is as follows：
WhereinFor the cross-correlation coefficient of two channel receiving signals, S1(t) signal, S are received for main POLARIZATION CHANNEL2(t) it is
Auxiliary polarization channel receiving signal, S2 *(t) conjugation of signal is received for auxiliary POLARIZATION CHANNEL, P is auxiliary POLARIZATION CHANNEL output work
Rate.
Third step polarization, which offsets output module and carries out polarization, to be offseted output and offsets result S0(t)
S0(t)=S1(t)-w·S2(t) (6)
Wherein, S0(t) output is offseted for polarization to offset as a result, S1(t) signal, S are received for main POLARIZATION CHANNEL2It (t) is auxiliary
POLARIZATION CHANNEL receives signal, and w is that polarization offsets coefficient.
So far, it realizes and bait signal is offseted.
The present invention utilizes the polarization information and real goal of active decoy in the case where radar is interfered by active decoy
The polarization information difference of echo and the interference timing of active decoy receive system resolving polarization using cross-polarized antennas and offset
Coefficient offsets bait signal.This method passes through theory deduction and simulating, verifying, can balance out and lure from radar return
Bait signal obtains real goal echo-signal, provides foundation for the subsequent tenacious tracking to real goal.
Specific embodiment
Embodiment 1
A kind of anti-active decoy interference system offseted based on polarization, including：At cross-polarized antennas receiving module, signal
Reason module and polarization offset output module.
The function of the cross-polarized antennas receiving module is：Obtain the signal of two cross-polarized antennas receiving channels；
The function of signal processing module is：Main polarization channel and auxiliary polarization channel are differentiated, and calculates polarization accordingly and offsets
Coefficient；
Polarization offsets the function of output module：It offsets coefficient according to polarization the signal in two channels is offseted to obtain thunder
Up to echo-signal.
Embodiment 2
A kind of anti-active decoy interference method offseted based on polarization, the specific steps are that：
The signal of first step cross polarization receiving antenna module reception two orthogonal channels of radar
According to active decoy interference principle, active decoy interference is ahead of radar signal in time-domain, is more than in amplitude
Radar signal, thus according to receive signal amplitude scintillation change, intercept respectively two channel receiving signal amplitude drastic changes it is critical when
Bait signal S of the signal of period as two channel receptions before quarter1r(t), S2r(t).First cross polarization channel reception
Complete signal be S1c(t), the complete signal of the second cross polarization channel channel reception is S2c(t)。
Second step signal processing module, which differentiates main polarization channel and auxiliary polarization channel and calculates polarization, offsets coefficient
According to the bait signal S of two channel receptions1r(t) and S2r(t) power determines main polarization channel and auxiliary polarization
Channel, and calculate polarization and offset coefficient w：
WhereinWithFor the reception power in two channels, whenWhen, then first passage is main POLARIZATION CHANNEL, the
POLARIZATION CHANNEL, assignment are helped supplemented by two channels：
WhenWhen, then first passage is auxiliary POLARIZATION CHANNEL, and second channel is main POLARIZATION CHANNEL, assignment：
The formula that polarization offsets coefficient w is as follows：
WhereinFor the cross-correlation coefficient of two channel receiving signals, S1(t) signal, S are received for main POLARIZATION CHANNEL2(t) it is
Auxiliary polarization channel receiving signal, S2 *(t) conjugation of signal is received for auxiliary POLARIZATION CHANNEL, P is auxiliary POLARIZATION CHANNEL output work
Rate.
Third step polarization, which offsets output module and carries out polarization, to be offseted output and offsets result S0(t)
S0(t)=S1(t)-w·S2(t) (6)
Wherein, S0(t) output is offseted for polarization to offset as a result, S1(t) signal, S are received for main POLARIZATION CHANNEL2It (t) is auxiliary
POLARIZATION CHANNEL receives signal, and w is that polarization offsets coefficient.
So far, it realizes and bait signal is offseted.
Claims (2)
1. a kind of anti-active decoy interference system offseted based on polarization, it is characterised in that including：Cross-polarized antennas receives mould
Block, signal processing module and polarization offset output module；
The function of the cross-polarized antennas receiving module is：Obtain the signal of two cross-polarized antennas receiving channels；
The function of signal processing module is：Main polarization channel and auxiliary polarization channel are differentiated, and calculates polarization accordingly and offsets coefficient；
Polarization offsets the function of output module：Coefficient is offseted according to polarization the signal in two channels is offseted to obtain radar time
Wave signal.
2. a kind of anti-active decoy interference method offseted based on polarization, it is characterised in that the specific steps are：
The signal of first step cross polarization receiving antenna module reception two orthogonal channels of radar
According to active decoy interference principle, active decoy interference is ahead of radar signal in time-domain, is more than radar in amplitude
Signal, thus according to receive signal amplitude scintillation change, intercept respectively two channel receiving signal amplitude drastic change critical moments it
Bait signal S of the signal of preceding period as two channel receptions1r(t), S2r(t)；First cross polarization channel reception it is complete
Entire signal is S1c(t), the complete signal of the second cross polarization channel channel reception is S2c(t)；
Second step signal processing module, which differentiates main polarization channel and auxiliary polarization channel and calculates polarization, offsets coefficient according to two
The bait signal S of channel reception1r(t) and S2r(t) power determines main polarization channel and auxiliary polarization channel, and calculates polarization
Offset coefficient w：
WhereinWithFor the reception power in two channels, whenWhen, then first passage is main POLARIZATION CHANNEL, second channel
To assist POLARIZATION CHANNEL, assignment：
WhenWhen, then first passage is auxiliary POLARIZATION CHANNEL, and second channel is main POLARIZATION CHANNEL, assignment：
The formula that polarization offsets coefficient w is as follows：
WhereinFor the cross-correlation coefficient of two channel receiving signals, S1(t) signal, S are received for main POLARIZATION CHANNEL2It (t) is auxiliary
POLARIZATION CHANNEL receives signal, S2 *(t) conjugation of signal is received for auxiliary POLARIZATION CHANNEL, P is auxiliary POLARIZATION CHANNEL output power；
Third step polarization, which offsets output module and carries out polarization, to be offseted output and offsets result S0(t)
S0(t)=S1(t)-w·S2(t) (6)
Wherein, S0(t) output is offseted for polarization to offset as a result, S1(t) signal, S are received for main POLARIZATION CHANNEL2It (t) is auxiliary polarization
Channel receiving signal, w are that polarization offsets coefficient；
So far, it realizes and bait signal is offseted.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109725297A (en) * | 2019-01-18 | 2019-05-07 | 中国科学院国家空间科学中心 | A kind of active repeating jamming recognition methods based on echo polarizability |
| RU202457U1 (en) * | 2019-12-19 | 2021-02-18 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия материально-технического обеспечения имени генерала армии А.В. Хрулёва" | DEVICE FOR POLARIZATION SELECTION AND COMPENSATION FOR RADAR TRAPS |
| CN112859015A (en) * | 2021-01-11 | 2021-05-28 | 中国人民解放军战略支援部队信息工程大学 | Fully-polarized radar bait device with novel structure and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112859015A (en) * | 2021-01-11 | 2021-05-28 | 中国人民解放军战略支援部队信息工程大学 | Fully-polarized radar bait device with novel structure and method |
| CN112859015B (en) * | 2021-01-11 | 2023-06-02 | 中国人民解放军战略支援部队信息工程大学 | Novel-structure full-polarization radar bait device and method |
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Application publication date: 20181127 |