CN104200112B - Omnidirectional radar angle-measurement method and system based on rotating-field antenna - Google Patents
Omnidirectional radar angle-measurement method and system based on rotating-field antenna Download PDFInfo
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- CN104200112B CN104200112B CN201410458047.2A CN201410458047A CN104200112B CN 104200112 B CN104200112 B CN 104200112B CN 201410458047 A CN201410458047 A CN 201410458047A CN 104200112 B CN104200112 B CN 104200112B
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Abstract
The invention relates to the technical field of omnidirectional radar and discloses an omnidirectional radar angle-measurement method and system based on a rotating-field antenna. The method comprises the steps that airspace is divided according to an antenna combination mode; the azimuthal angle theta of a target trace point is calculated in an amplitude comparison and angle measurement mode; the tract point and flight path data association calculation is carried out, and flight paths meeting relevant requirements are updated; for flight paths not meeting the relevant requirements, a target true azimuthal angle is calculated, and flight paths are set, or trace point condensation processing is carried out. According to the omnidirectional radar angle-measurement method and system based on the rotating-field antenna, by the adoption of signal emitting time and space diversity technology, the problem that a measurement angle is fuzzy is solved, an omnidirectional radar angle-measurement theory based on the rotating-field antenna is perfected, and the omnidirectional radar with various advantages can be put into actual engineering application.
Description
Technical field
The present invention relates to more specifically, it is to be related to a kind of omnidirectional's radar angle measurement method based on rotating-field antenna and be
System.
Background technology
At present, rotating-field antenna is widely used in radar and other numerous areas, such as communicating, broadcasting electricity
Omnidirectional emission and reception depending on field electromagnetic wave.Omnidirectional's radar based on rotating-field antenna is a kind of new system radar, has
The advantage such as little, lightweight in small volume, power, low cost and reliability height.In azimuth plane theaomni-directional transmission and reception electromagnetic beam
In the case of how to measure the azimuth of target be the key issue that this radar faces first.
Omnidirectional's radar based on rotating-field antenna mainly measures the azimuth of target by measuring angle by comparing amplitude, works as target echo
When entering reception antenna with certain azimuth, three passages corresponding to equally distributed reception antenna oscillator can receive difference
The echo-signal of amplitude, can obtain azimuth of target in theory by way of solving equations.When engineering is realized, threeway
Road measuring angle by comparing amplitude precision is affected by noise larger and calculates loaded down with trivial details, therefore can be led to according to the beam feature of rotating-field antenna
Cross passage and be synthetically formed the consistent left-handed and dextrorotation passage of signal amplitude, then calculated by comparing the phasometer of two passages
The azimuth of target.The rotating-field antenna being illustrated in figure 1 two pairs of oscillators receives target echo schematic diagram, due to reception antenna
Oscillator has 180 ° of symmetry characteristics it is impossible to distinguish target echo with θ angle or+180 ° of entrance reception antennas of θ, measuring angle by comparing amplitude method is deposited
Resolve fuzzy problem in angle.The problem that omnidirectional's radar angle measurement based on rotating-field antenna obscures is the intrinsic spy of this radar
Levy, need new technological means to solve this problem.
Content of the invention
For the drawbacks described above of prior art, the technical problem to be solved is how to solve existing omnidirectional radar
Angle measurement fuzzy problem.
For solving above-mentioned technical problem, on the one hand, the invention provides a kind of surveyed based on omnidirectional's radar of rotating-field antenna
Angle method, described omnidirectional radar includes 4 secondary independent transmitting antennas, and described 4 slave antennas differ 90 ° of configurations successively；Methods described
Including step：
Radar detection spatial domain is divided into 2 combination launch sites by the combination of described 4 slave antennas and 2 public overlapping
Area, described 4 slave antennas are simultaneously to air-launched wave beam；
Receive target echo, form the consistent left-handed and dextrorotation passage of signal amplitude, the relatively more left-handed phase with dextrorotation passage
Potential difference calculates the azimuth angle theta of Targets Dots；
Carry out a mark and associate calculating with track data, azimuth angle theta and flight path first by described mark carry out related sentencing
Disconnected, if meeting related request, update flight path with the azimuth angle theta of described mark；If not meeting related request, mark will be put
In azimuth be changed into+180 ° of θ after carry out correlated judgment with flight path again, if now meeting related request, with azimuth angle theta+
180 ° of renewal flight paths；
Judging whether meet, with incoherent mark of flight path, the criterion setting up flight path, if not being inconsistent, carrying out at Plot coherence
Reason；If meeting, before setting up flight path, target region being judged according to the azimuth angle theta of described mark, closing related sky
Line combines, and calculates target true bearing angle.
Preferably, described by radar detection spatial domain by the combination of described 4 slave antennas be divided into 2 combination launch sites and
2 public crossover regions include step：
By radar detection spatial domain be divided into the first combination launch site of first antenna and the second antenna combination, third antenna and
Second combination launch site of the 4th antenna combination, obtain simultaneously the first public crossover region between first antenna and the 4th antenna, the
Between two antennas and third antenna second public crossover region.
Preferably, the described azimuth angle theta according to described mark judges target region, closes related antenna combination,
Calculate target true bearing angle and include step：
If target, in the combination launch site of region first, turns off third antenna and the 4th antenna within 3 frame periods,
If remaining able to receive the information of target it is determined that target is in the first combination launch site, the true bearing angle of target is θ；
Otherwise, it determines target is in the second combination launch site, the true bearing angle of target is+180 ° of θ；
If target is in the first public crossover region, within 3 frame periods, turn off the second antenna and third antenna, if
Remain able to receive the information of target it is determined that target is in the first public crossover region, the true bearing angle of target is θ；Otherwise,
Determine target in the second public crossover region, the true bearing angle of target is+180 ° of θ；
If target is in the second public crossover region, within 3 frame periods, turn off the second antenna and third antenna, if
Remain able to receive the information of target it is determined that target is in the first public crossover region, the true bearing angle of target is+180 ° of θ,
Otherwise, it determines target is in the second public crossover region, the true bearing angle of target is θ.
Preferably, in methods described, synthesize process through passage and form the consistent left-handed and dextrorotation passage of signal amplitude.
Preferably, described judge whether to meet with incoherent mark of flight path set up the criterion of flight path and include step：
Judge whether to receive the point mark information of same target within many frame periods, if it is meet；Otherwise do not meet.
On the other hand, the present invention also provides a kind of omnidirectional's radar angle measurement system based on rotating-field antenna simultaneously, described
Omnidirectional's radar includes 4 secondary independent transmitting antennas, and described 4 slave antennas differ 90 ° of configurations successively；Described system includes：
Spatial domain division module, sends out for radar detection spatial domain is divided into 2 combinations by the combination of described 4 slave antennas
Penetrate area and 2 public crossover regions, described 4 slave antennas are simultaneously to air-launched wave beam；
Measuring angle by comparing amplitude module, for receiving target echo, forms the consistent left-handed and dextrorotation passage of signal amplitude, relatively more left
The phasometer of rotation and dextrorotation passage calculates the azimuth angle theta of Targets Dots；
Association computing module, is used for carrying out a mark associating calculating with track data, first by the azimuth angle theta of described mark
Carrying out correlated judgment with flight path, if meeting related request, updating flight path with the azimuth angle theta of described mark；If do not met
Related request, then be changed into after+180 ° of θ carrying out correlated judgment with flight path again by the azimuth in a mark, if now meeting correlation
Require, then use+180 ° of renewal flight paths of azimuth angle theta；
True angle measurement module, for judging whether meet, with incoherent mark of flight path, the criterion setting up flight path, if be not inconsistent
Then carry out Plot coherence process；If meeting, before setting up flight path, target location is judged according to the azimuth angle theta of described mark
Domain, closes related antenna combination, calculates target true bearing angle.
Preferably, described spatial domain division module further includes：
Region division module, for being divided into the first combination of first antenna and the second antenna combination by radar detection spatial domain
Second combination launch site of launch site, third antenna and the 4th antenna combination, obtains between first antenna and the 4th antenna simultaneously
The second public crossover region between the first public crossover region, the second antenna and third antenna.
Preferably, described true angle measurement module further includes：
Launch site angle measurement module, for when preliminary judgement target is in the combination launch site of region first, 3 frame periods
Interior shutoff third antenna and the 4th antenna, if remain able to receive the information of target it is determined that target is in the first combination transmitting
In area, the true bearing angle of target is θ；Otherwise, it determines target is in the second combination launch site, the true bearing angle of target be θ+
180°；
First crossover region angle measurement module, for when preliminary judgement target is in the first public crossover region, 3 frame periods
Interior shutoff the second antenna and third antenna, if remain able to receive the information of target it is determined that target is public overlapping first
In area, the true bearing angle of target is θ；Otherwise, it determines target is in the second public crossover region, the true bearing angle of target be θ+
180°；
Second crossover region angle measurement module, for when preliminary judgement target is in the second public crossover region, 3 frame periods
Interior shutoff the second antenna and third antenna, if remain able to receive the information of target it is determined that target is public overlapping first
In area, the true bearing angle of target is+180 ° of θ, otherwise, it determines target is in the second public crossover region, the true bearing of target
Angle is θ.
Preferably, in described measuring angle by comparing amplitude module, synthesize process through passage and form consistent left-handed and right of signal amplitude
Rotation passage.
Preferably, in described true angle measurement module, judge whether to receive the point mark information of same target within many frame periods,
If it is meet the criterion setting up flight path；Otherwise do not meet.
The present invention adopts signal transmission time space diversity technology, solves angle measurement fuzzy problem, perfect based on rotation
Omnidirectional's radar angle measurement of antenna theoretical so that this radar with numerous advantages put into that practical engineering application becomes can
Energy.
Brief description
Fig. 1 is that the rotating-field antenna of two pairs of oscillators receives target echo schematic diagram；
Fig. 2 is the formation schematic diagram of left passage and right passage；
Fig. 3 is the structural representation of omnidirectional's transmitting radar antenna in one embodiment of the present of invention；
Fig. 4 is omnidirectional's radar emission time and space diversity schematic diagram in one embodiment of the present of invention；
Fig. 5 is that the flow process of the omnidirectional's radar angle measurement method in a preferred embodiment of the present invention based on rotating-field antenna is shown
It is intended to.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes.Obviously, described embodiment is to implement the better embodiment of the present invention, and described description is so that the present invention to be described
Rule for the purpose of, be not limited to the scope of the present invention.Protection scope of the present invention should be with claim institute circle
The person of determining is defined, and based on the embodiment in the present invention, those of ordinary skill in the art are not on the premise of making creative work
The every other embodiment being obtained, broadly falls into the scope of protection of the invention.
The basic skills of the angle measurement based on rotating-field antenna is measuring angle by comparing amplitude, as shown in figure 1, when target echo is entered with θ angle
When entering reception antenna, equally distributed A, B two can receive the echo-signal of different amplitudes to two passages corresponding to oscillator,
θ angle can be obtained by way of solving equations.When realizing in engineering, multichannel measuring angle by comparing amplitude precision is affected by noise
Larger and calculate loaded down with trivial details, therefore signal amplitude can be synthetically formed by passage consistent according to the beam feature of rotating-field antenna
But the different left and right passage of phase place, as shown in Fig. 2 then calculate the orientation of target by comparing the phasometer of two passages
Angle.
But in actual conditions, return it is impossible to distinguish target because the oscillator of reception antenna physically has 180 ° of symmetry characteristics
With θ angle or+180 ° of entrance reception antennas of θ, there is angle and resolve fuzzy problem in measuring angle by comparing amplitude method to ripple, show solving equation group
When, obtain two solutions that there is 180 ° of difference in 0 °～360 ° codomains.For this defect, when the present invention proposes signal transmitting
Between space diversity method solve the angle measurement fuzzy problem of omnidirectional's radar based on rotating-field antenna.
Signal transmission time space diversity is to be reached using the spatial domain that on the transmission signal time, alternately two angle measurements of covering obscure
Purpose to ambiguity solution.Launch time space diversity needs transmitting antenna to possess the ability of space sensing, forms two in azimuth plane
Individual wave beam, the spatial domain of 180 ° of each wave cover, but in real work, two wave beams there is a problem of overlapping, and is in crossover region
Interior target still can not solve angle measurement fuzzy problem.
The present invention solves the problems, such as wave beam crossover region using comprising 4 secondary independent transmitting antennas, is illustrated in figure 3 omnidirectional's thunder
Reach transmitting antenna composition schematic diagram.4 slave antennas can need to be configured to two kinds of overlapping situations according to angle measurement, when first antenna 1 and
When two antennas 2 are one group, third antenna 3 and the 4th antenna 4 are another group, crossover region is as shown in Fig. 4 left figure；When first antenna 1
With the 4th antenna 4 to be one group, the second antenna 2 and third antenna 3 be another group when, crossover region is as shown in Fig. 4 right figure.In the present invention
In, using signal transmission time space diversity technology, solve angle measurement fuzzy problem.Its method is divided empty by the combination of antenna
Domain；Calculate the azimuth angle theta of Targets Dots first with measuring angle by comparing amplitude；Carry out a mark again and associate calculating with track data, update symbol
Close the flight path of related request；To the flight path not meeting related request, calculate target true bearing angle and set up flight path, or carry out
Plot coherence carries out above-mentioned process after processing more detailed information to be obtained again.
More specifically, as shown in figure 5, solution target angle measurement fuzzy problem is closely related with radar data processing system, Fig. 5
Describe how to obtain the true bearing angle of target：
As shown in Fig. 4 left figure, radar detection spatial domain is divided into first antenna 1 and the second antenna 2 combines launch site
SECTOR_1_2, third antenna 3 and the 4th antenna 4 combination launch site SECTOR_3_4, public crossover region SECTOR_COM_1,
SECTOR_COM_2,4 slave antennas are simultaneously to air-launched wave beam.
Reception antenna receives target echo, forms the consistent left-handed and dextrorotation of signal amplitude through process such as passage conjunctions and leads to
Road, more left-handed and dextrorotation passage the phasometer of radar signal processor calculates the azimuth of target, and at radar data
Reason system sending point mark information (azimuth angle theta), the region that is likely to occur of point mark is SECTOR_1_2, SECTOR_COM_1,
SECTOR_COM_2.
Data handling system is carried out a mark and is associated calculating with track data, enters with flight path first by a mark (azimuth angle theta)
Row correlated judgment, if meeting related request, updates flight path with point mark (azimuth angle theta)；If not meeting related request, will
Azimuth in point mark is changed into+180 ° of θ, then carries out a mark (+180 ° of azimuth angle theta) and flight path correlated judgment again, if met
Related request, then update flight path with point mark (+180 ° of azimuth angle theta).
Radar data processing system will carry out Plot coherence etc. with incoherent mark (azimuth angle theta) of flight path and process, if
Receive the point mark information of same target within many frame periods, meet the quasi- side that radar data Processing Algorithm sets up flight path, then building
Before vertical flight path, data handling system judges target region according to a mark (azimuth angle theta), closes related antenna combination,
Calculate target true bearing angle.
Specifically, if target is in the SECTOR_1_2 of region, turn off third antenna 3 and the 4th within 3 frame periods
Antenna 4, if remaining able to receive the information of target it is determined that target is in the SECTOR_1_2 of region, the true bearing of target
Angle is θ；Otherwise, it determines target is in the SECTOR_3_4 of region, the true bearing angle of target is+180 ° of θ.
If target is in the SECTOR_COM_1 of region, turn off the second antenna 2 and third antenna 3 within 3 frame periods,
If remaining able to receive the information of target it is determined that target is in the SECTOR_COM_1 of region, the true bearing angle of target is
θ, otherwise, it determines target is in the SECTOR_COM_2 of region, the true bearing angle of target is+180 ° of θ.
If target is in the SECTOR_COM_2 of region, within 3 frame periods, equally then turn off the second antenna 2 and the 3rd day
Line 3, if remaining able to receive the information of target it is determined that target is in the SECTOR_COM_1 of region, the true bearing of target
Angle is+180 ° of θ, otherwise, it determines target is in the SECTOR_COM_2 of region, the true bearing angle of target is θ.
The present invention reaches the purpose of ambiguity solution using the spatial domain that on the transmission signal time, alternately two angle measurements of covering obscure.By
In using possess space sensing ability antenna, azimuth plane formed two wave beams, the spatial domain of 180 ° of each wave cover, close
Cut with reference to radar data handling process, by controlling certain antenna combination of open and close, alternately cover the spatial domain that angle measurement obscures, solve
Angle measurement disambiguity problem.Akin with the present invention, also solution angle measurement can be substituted using tranmitting frequency space diversity scheme
Fuzzy problem, concrete grammar is to go to cover the spatial domain that two angle measurements obscure using the transmission signal of two different frequencies, during reception
Process the purpose to reach ambiguity solution by frequency diversity.Which is similar with the launch time space diversity method of the present invention, needs
Transmitting antenna is wanted to possess the ability of space sensing, transmitting antenna at least can form two wave beams, each wave cover in azimuth plane
180 ° of spatial domain, but the program needs more process resources, thus leading to system cost higher, will not be described here.
It will appreciated by the skilled person that it is permissible for realizing all or part of step in above-described embodiment method
Instruct related hardware to complete by program, described program can be stored in a computer read/write memory medium,
Upon execution, including each step of above-described embodiment method, and described storage medium can be this program：ROM/RAM, magnetic
Dish, CD, storage card etc..Therefore, relevant technical staff in the field will be understood that corresponding with the method for the present invention, this
Bright also include a kind of omnidirectional's radar angle measurement system based on rotating-field antenna simultaneously, it is secondary independent that wherein said omnidirectional radar includes 4
Transmitting antenna, described 4 slave antennas differ 90 ° of configurations successively, and with said method step correspondingly, this system includes：
Spatial domain division module, sends out for radar detection spatial domain is divided into 2 combinations by the combination of described 4 slave antennas
Penetrate area and 2 public crossover regions, described 4 slave antennas are simultaneously to air-launched wave beam；
Measuring angle by comparing amplitude module, for receiving target echo, forms the consistent left-handed and dextrorotation passage of signal amplitude, relatively more left
The phasometer of rotation and dextrorotation passage calculates the azimuth angle theta of target；
Association computing module, is used for carrying out a mark associating calculating with track data, first by the described azimuth angle theta of a mark
Carrying out correlated judgment with flight path, if meeting related request, updating flight path with described azimuth angle theta；If not meeting related wanting
Ask, be then changed into after+180 ° of θ carrying out correlated judgment with flight path again by the azimuth in a mark, if now meeting related request,
With+180 ° of renewal flight paths of azimuth angle theta；
True angle measurement module, for judging whether meet, with incoherent mark of flight path, the criterion setting up flight path, if be not inconsistent
Then carry out Plot coherence process；If meeting, before setting up flight path, target location is judged according to the described azimuth angle theta of a mark
Domain, closes related antenna combination, calculates target true bearing angle.
It is a new system radar at home based on omnidirectional's radar of rotating-field antenna, have as little, heavy in small volume, power
Measure the advantages such as light, low cost and reliability height.But because the oscillator of reception antenna has 180 ° of symmetry characteristics, azimuth of target
There is fuzzy problem in solution procedure, it is the inherent shortcoming of this new system radar that angle measurement obscures.The present invention adopts signal transmission time
Space diversity technology, solves angle measurement fuzzy problem, perfect omnidirectional's radar angle measurement based on rotating-field antenna theoretical so that tool
This radar having numerous advantages is put into practical engineering application and is possibly realized.
Described above illustrate and describes some preferred embodiments of the present invention, but as previously mentioned it should be understood that the present invention
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and can be used for various other combinations,
Modification and environment, and can be in invention contemplated scope described herein, by technology or the knowledge of above-mentioned teaching or association area
It is modified.And the change that those skilled in the art are carried out and change without departing from the spirit and scope of the present invention, then all should be at this
In the protection domain of bright claims.
Claims (10)
1. a kind of omnidirectional's radar angle measurement method based on rotating-field antenna is it is characterised in that described omnidirectional radar includes 4 pairs independently
Transmitting antenna, described 4 slave antennas differ 90 ° of configurations successively；Methods described includes step：
Radar detection spatial domain is divided into 2 combination launch sites and 2 public crossover regions by the combination of described 4 slave antennas,
Described 4 slave antennas are simultaneously to air-launched wave beam；
Receive target echo, form the consistent left-handed and dextrorotation passage of signal amplitude, the relatively more left-handed phase difference with dextrorotation passage
Calculate the azimuth angle theta of Targets Dots；
Carry out a mark and associate calculating with track data, azimuth angle theta and flight path first by described mark carry out correlated judgment, such as
Fruit meets related request, then update flight path with the azimuth angle theta of described mark；If not meeting related request, by a mark
Azimuth carries out correlated judgment with flight path after being changed into+180 ° of θ again, if now meeting related request, uses+180 ° of azimuth angle theta
Update flight path；
Judging whether meet, with incoherent mark of flight path, the criterion setting up flight path, if not being inconsistent, carrying out Plot coherence process；If
Meet, before setting up flight path, target region is judged according to the azimuth angle theta of described mark, close related antenna sets
Close, calculate target true bearing angle.
2. method according to claim 1 it is characterised in that described by radar detection spatial domain press described 4 slave antennas group
Conjunction model split is 2 combination launch sites and 2 public crossover regions include step：
Radar detection spatial domain is divided into first antenna and the first of the second antenna combination and combines launch site, third antenna and the 4th
Second combination launch site of antenna combination, obtain simultaneously the first public crossover region between first antenna and the 4th antenna, second day
Between line and third antenna second public crossover region.
3. method according to claim 2 is it is characterised in that the described azimuth angle theta according to described mark judges target institute
In region, close related antenna combination, calculate target true bearing angle and include step：
If target, in the combination launch site of region first, turns off third antenna and the 4th antenna within 3 frame periods, if
Remain able to receive the information of target it is determined that target is in the first combination launch site, the true bearing angle of target is θ；Otherwise,
Determine target in the second combination launch site, the true bearing angle of target is+180 ° of θ；
If target is in the first public crossover region, turn off the second antenna and third antenna within 3 frame periods, if still
The information of target can be received it is determined that target is in the first public crossover region, the true bearing angle of target is θ；Otherwise, it determines
In the second public crossover region, the true bearing angle of target is+180 ° of θ to target；
If target is in the second public crossover region, turn off the second antenna and third antenna within 3 frame periods, if still
The information of target can be received it is determined that target is in the first public crossover region, the true bearing angle of target is+180 ° of θ, no
Then, determine target in the second public crossover region, the true bearing angle of target is θ.
4. the method according to any one of claim 1-3 is it is characterised in that in methods described, at passage synthesis
Reason forms the consistent left-handed and dextrorotation passage of signal amplitude.
5. the method according to any one of claim 1-3 is it is characterised in that described judgement and incoherent mark of flight path
Whether meet and set up the criterion of flight path and include step：
Judge whether to receive the point mark information of same target within many frame periods, if it is meet；Otherwise do not meet.
6. a kind of omnidirectional's radar angle measurement system based on rotating-field antenna is it is characterised in that described omnidirectional radar includes 4 pairs independently
Transmitting antenna, described 4 slave antennas differ 90 ° of configurations successively；Described system includes：
Spatial domain division module, for being divided into 2 combination launch sites by radar detection spatial domain by the combination of described 4 slave antennas
With 2 public crossover regions, described 4 slave antennas are simultaneously to air-launched wave beam；
Measuring angle by comparing amplitude module, for receiving target echo, forms the consistent left-handed and dextrorotation passage of signal amplitude, relatively more left-handed with
The phasometer of dextrorotation passage calculates the azimuth angle theta of Targets Dots；
Association computing module, is used for carrying out a mark associating calculating, the azimuth angle theta first by described mark and boat with track data
Mark carries out correlated judgment, if meeting related request, updates flight path with the azimuth angle theta of described mark；If not meeting correlation
Require, be then changed into after+180 ° of θ carrying out correlated judgment with flight path again by the azimuth in a mark, if now meeting related request,
Then use+180 ° of renewal flight paths of azimuth angle theta；
True angle measurement module, for judging whether meet, with incoherent mark of flight path, the criterion setting up flight path, if not being inconsistent, enters
Row Plot coherence is processed；If meeting, before setting up flight path, target region is judged according to the azimuth angle theta of described mark,
Close related antenna combination, calculate target true bearing angle.
7. system according to claim 6 is it is characterised in that described spatial domain division module further includes：
Region division module, for being divided into the first combination transmitting of first antenna and the second antenna combination by radar detection spatial domain
Second combination launch site of area, third antenna and the 4th antenna combination, obtains first between first antenna and the 4th antenna simultaneously
The second public crossover region between public crossover region, the second antenna and third antenna.
8. system according to claim 7 is it is characterised in that described true angle measurement module further includes：
Launch site angle measurement module, for when preliminary judgement target is in the combination launch site of region first, closing within 3 frame periods
Disconnected third antenna and the 4th antenna, if remaining able to receive the information of target it is determined that target is in the first combination launch site,
The true bearing angle of target is θ；Otherwise, it determines target is in the second combination launch site, the true bearing angle of target is+180 ° of θ；
First crossover region angle measurement module, for when preliminary judgement target is in the first public crossover region, closing within 3 frame periods
Disconnected second antenna and third antenna, if remaining able to receive the information of target it is determined that target is in the first public crossover region,
The true bearing angle of target is θ；Otherwise, it determines target is in the second public crossover region, the true bearing angle of target is+180 ° of θ；
Second crossover region angle measurement module, for when preliminary judgement target is in the second public crossover region, closing within 3 frame periods
Disconnected second antenna and third antenna, if remaining able to receive the information of target it is determined that target is in the first public crossover region,
The true bearing angle of target is+180 ° of θ, otherwise, it determines target is in the second public crossover region, the true bearing angle of target is θ.
9. the system according to any one of claim 6-8 is it is characterised in that in described measuring angle by comparing amplitude module, Jing Guotong
Road synthesizes process and forms the consistent left-handed and dextrorotation passage of signal amplitude.
10. the system according to any one of claim 6-8 is it is characterised in that in described true angle measurement module, judgement is
The no point mark information receiving same target within many frame periods, if it is meets the criterion setting up flight path；Otherwise do not meet.
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| CN104993220B (en) * | 2015-06-12 | 2018-11-16 | 四川九洲电器集团有限责任公司 | Rotating field formula omnidirectional antenna, low altitude short range radar system and signal processing method |
| CN110209988B (en) * | 2019-05-05 | 2022-11-25 | 中国人民解放军63921部队 | Method and apparatus for determining antenna noise temperature due to spherical blackbody radiation |
| CN111682303B (en) * | 2020-05-09 | 2022-03-22 | 四川九洲电器集团有限责任公司 | Common-aperture full-airspace coverage antenna |
| CN113820687A (en) * | 2021-10-19 | 2021-12-21 | 中安锐达(北京)电子科技有限公司 | Radar point track correlation algorithm considering first-order velocity ambiguity |
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