CN109782217A - A kind of method and device for calibrating airborne interferometer calibration value - Google Patents
A kind of method and device for calibrating airborne interferometer calibration value Download PDFInfo
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- CN109782217A CN109782217A CN201910071338.9A CN201910071338A CN109782217A CN 109782217 A CN109782217 A CN 109782217A CN 201910071338 A CN201910071338 A CN 201910071338A CN 109782217 A CN109782217 A CN 109782217A
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Abstract
This application provides a kind of method and device for obtaining airborne interferometer calibration value, calibration value includes internal calibration value and external calibration value, this method comprises: obtaining initial internal calibration value based on the calibration signal that pre-set calibration source generates；Based on initial internal calibration value and calibration signal, each channel of airborne interferometer is adjusted；The airborne interferometer and calibration signal adjusted based on channel, obtains the internal calibration value of airborne interferometer；Calibration source is closed, using pre-set calibration radiation source to airborne interferometer transmitting calibration radiation signal, the initial external calibration value of airborne interferometer is obtained based on internal calibration value；Based on initial external calibration value and calibration radiation signal, the antenna of airborne interferometer is adjusted to the communication link in each channel；The airborne interferometer and calibration radiation signal adjusted based on communication link, obtains the external calibration value of airborne interferometer.The reliability of calibration value can be effectively promoted, and then promotes the accuracy of direction finding.
Description
Technical field
This application involves collimation technique field, in particular to a kind of method for obtaining airborne interferometer calibration value and
Device.
Background technique
A kind of important technology of the airborne interferometer direction finding as passive detection, with direction finding precision is high, working band is wide, is
The features such as structure of uniting is simple, deployment is easy, is widely used.But since airborne interferometer utilizes each antenna element
Phase difference carries out direction finding, thus, direction finding precision is by antenna element to inconsistency between channel and channel and channel
Influence, therefore, in engineer application, need to be pre-configured with airborne interferometer calibration value, with eliminate antenna element to channel and
The influence of Sensor gain and phase perturbations between channel and channel, and direction finding is carried out based on calibration value.
Currently, when configuring airborne interferometer calibration value, it is general by setting calibration source and calibration radiation source, utilize machine
It carries the receiver on interferometer and receives the signal that each channel obtains, the signal of acquisition is analyzed, calibration value is obtained.It is obtaining
After calibration value, calibration radiation source emits echo signal, and airborne interferometer is handled received echo signal according to calibration value,
The azimuth information of echo signal is obtained, to realize the direction finding to calibration radiation source.But the configuration airborne interferometer calibration value
Method, do not consider configuration calibration value confidence level, i.e., in calibration value configuration process, do not consider antenna element to channel with
And influence of the inconsistency to calibration value between channel and channel, it is difficult to guarantee the reliability of airborne interferometer calibration value, thus,
The accuracy for carrying out direction finding based on the calibration value also will receive influence, and precision is not high.
Summary of the invention
In view of this, the application's is designed to provide a kind of method and device for obtaining airborne interferometer calibration value, mention
The reliability of calibration value is risen, and then promotes the accuracy of direction finding.
In a first aspect, the embodiment of the present application provides a kind of method for obtaining airborne interferometer calibration value, this method comprises:
Based on the calibration signal that pre-set calibration source generates, the initial internal calibration value of the airborne interferometer is obtained；
Based on the initial internal calibration value and the calibration signal, each channel of the airborne interferometer is adjusted；
The airborne interferometer adjusted based on channel and the calibration signal, obtain the interior school of the airborne interferometer
Quasi- value；
The calibration source is closed, is radiated and is believed to the airborne interferometer transmitting calibration using pre-set calibration radiation source
Number, the initial external calibration value of the airborne interferometer is obtained based on the internal calibration value；
Based on the initial external calibration value and the calibration radiation signal, the antenna of the airborne interferometer is adjusted to each
The communication link in channel；
Based on the airborne interferometer and the calibration radiation signal that communication link is adjusted, the airborne Interference is obtained
The external calibration value of instrument.
Optionally, described to be based on the initial internal calibration value and the calibration signal, adjust the airborne interferometer
Each channel, comprising:
For each channel of airborne interferometer, according to the initial internal calibration value to the school Jing Guo the channel transfer
Calibration signal is calibrated, and the first calibration signal is obtained, if the signal-to-noise ratio of first calibration signal is less than pre-set noise
Than first threshold, which is repaired, until the signal-to-noise ratio of first calibration signal is not less than pre-set noise
Compare first threshold；
The phase fluctuation of first calibration signal is counted, is set in advance if the phase fluctuation of first calibration signal is greater than
The phase fluctuation first threshold set repairs the corresponding channel of first calibration signal, until the phase wave in the channel
It is dynamic to be not more than pre-set phase fluctuation first threshold.
Optionally, the calibration signal includes the signal of multiple target frequency points, the phase fluctuation of first calibration signal
Greater than pre-set phase fluctuation first threshold, comprising:
For each target frequency point, the phase fluctuation of the target frequency point is counted, if the phase fluctuation of the target frequency point is greater than
Pre-set phase fluctuation first threshold confirms that the phase fluctuation of first calibration signal is greater than pre-set phase wave
Dynamic first threshold.
Optionally, the airborne interferometer adjusted based on channel and the calibration signal, are obtained described airborne
The internal calibration value of interferometer, comprising:
The airborne interferometer and the calibration signal based on phase fluctuation adjustment, obtain the airborne interferometer
Internal calibration value.
Optionally, the airborne interferometer adjusted based on channel and the calibration signal, are obtained described airborne
The internal calibration value of interferometer, comprising:
The channel and the calibration signal based on phase fluctuation adjustment, in the centre for obtaining the airborne interferometer
Calibration value；
For each channel of airborne interferometer, according to the intermediate internal calibration value to the school Jing Guo the channel transfer
Calibration signal is calibrated, and the second calibration signal is obtained, if the phase difference of second calibration signal between each channel is greater than in advance
The phase difference first threshold being first arranged repairs the corresponding channel of second calibration signal, until the phase in the channel
Difference is not more than pre-set phase difference first threshold；
The airborne interferometer and the calibration signal based on adjusting offset, obtain the interior of the airborne interferometer
Calibration value.
Optionally, described to be based on the initial external calibration value and the calibration radiation signal, adjust the airborne Interference
The antenna of instrument to each channel communication link, comprising:
For airborne interferometer antenna to each channel communication link, according to the initial external calibration value to by should
Communication link and the calibration radiation signal of corresponding channel transfer are calibrated, and the first calibration radiation signal are obtained, if institute
The signal-to-noise ratio for stating the first calibration radiation signal is less than pre-set signal-to-noise ratio second threshold, repairs to the communication link,
Until the signal-to-noise ratio of the second calibration radiation signal is not less than pre-set signal-to-noise ratio second threshold；
The phase fluctuation of the first calibration radiation signal is counted, if the phase fluctuation of the first calibration radiation signal is big
In pre-set phase fluctuation second threshold, the corresponding communication link of the first calibration radiation signal is repaired, directly
Phase fluctuation to the communication link is not more than pre-set phase fluctuation second threshold.
Optionally, the airborne interferometer and the calibration radiation signal adjusted based on communication link, is obtained
The external calibration value of the airborne interferometer, comprising:
The communication link and the calibration signal based on phase fluctuation adjustment, obtain the outer of the airborne interferometer
Calibration value.
Optionally, the airborne interferometer and the calibration radiation signal adjusted based on communication link, is obtained
The external calibration value of the airborne interferometer, comprising:
Based on the communication link and the calibration radiation signal of phase fluctuation adjustment, the airborne interferometer is obtained
Intermediate external calibration value；
For each channel of airborne interferometer, according to the intermediate external calibration value to by the communication link and corresponding
The calibration radiation signal of channel transfer is calibrated, and the second calibration radiation signal is obtained, if the institute between each communication link
The phase difference for stating the second calibration radiation signal is greater than pre-set phase difference second threshold, to the second calibration radiation signal
Corresponding communication link is repaired, until the phase difference of the communication link is not more than pre-set phase difference second threshold；
The communication link and the calibration radiation signal based on adjusting offset, obtain the airborne interferometer
External calibration value.
Optionally, after the external calibration value for obtaining the airborne interferometer, the method also includes:
The calibration source and the calibration radiation source are closed, the target emanation signal of target radiation source transmitting is received, is based on
The target emanation signal, the internal calibration value and the external calibration value carry out direction finding to the target radiation source.
Second aspect, the embodiment of the present application provide a kind of device for obtaining airborne interferometer calibration value, the calibration value
Including internal calibration value and external calibration value, which includes:
Initial internal calibration value obtains module, the calibration signal for being generated based on pre-set calibration source, described in acquisition
The initial internal calibration value of airborne interferometer；
Channel calibration module is adjusted described airborne dry for being based on the initial internal calibration value and the calibration signal
Each channel of interferometer；
Internal calibration value obtains module, and the airborne interferometer and the calibration signal for being adjusted based on channel are obtained
Take the internal calibration value of the airborne interferometer；
Initial external calibration value obtains module, for closing the calibration source, using pre-set calibration radiation source to institute
Airborne interferometer transmitting calibration radiation signal is stated, the initial external calibration of the airborne interferometer is obtained based on the internal calibration value
Value；
Communication link calibration module adjusts institute for being based on the initial external calibration value and the calibration radiation signal
The antenna of airborne interferometer is stated to the communication link in each channel；
External calibration value obtains module, the airborne interferometer and calibration radiation for being adjusted based on communication link
Signal obtains the external calibration value of the airborne interferometer.
The third aspect, the embodiment of the present application provide a kind of computer equipment, including memory, processor and are stored in institute
The computer program that can be run on memory and on the processor is stated, the processor executes real when the computer program
The step of existing above method.
Fourth aspect, the embodiment of the present application provide a kind of computer readable storage medium, the computer-readable storage
Computer program is stored on medium, the computer program executes above-mentioned method when being run by processor the step of.
A kind of method and device obtaining airborne interferometer calibration value provided by the embodiments of the present application, is set in advance by being based on
The calibration signal that the calibration source set generates, obtains the initial internal calibration value of the airborne interferometer；Based on the initial internal calibration
Value and the calibration signal, adjust each channel of the airborne interferometer；Based on channel adjust the airborne interferometer with
And the calibration signal, obtain the internal calibration value of the airborne interferometer；The calibration source is closed, pre-set calibration is utilized
Radiation source obtains the first of the airborne interferometer to the airborne interferometer transmitting calibration radiation signal, based on the internal calibration value
Beginning external calibration value；Based on the initial external calibration value and the calibration radiation signal, the antenna of the airborne interferometer is adjusted
To the communication link in each channel；Based on the airborne interferometer and the calibration radiation signal that communication link is adjusted, obtain
The external calibration value of the airborne interferometer.In this way, by being calibrated to inconsistent antenna between each channel and channel,
So that antenna to the signal-to-noise ratio of the signal between each channel and channel and phase fluctuation meets coherence request, day is eliminated
The phase difference that line, channel and component introduce can effectively promote the reliability of calibration value, and then promote the accuracy of direction finding.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the method flow schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer calibration value；
Fig. 2 is the method flow schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer internal calibration value；
Fig. 3 is the method flow schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer external calibration value；
Fig. 4 is the apparatus structure schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer calibration value；
Fig. 5 is a kind of structural schematic diagram of computer equipment 500 provided by the embodiments of the present application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
Middle attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
It is some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, below to the application's provided in the accompanying drawings
The detailed description of embodiment is not intended to limit claimed scope of the present application, but is merely representative of the selected reality of the application
Apply example.Based on embodiments herein, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall in the protection scope of this application.
Fig. 1 is the method flow schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer calibration value.Such as Fig. 1 institute
Showing, the calibration value includes internal calibration value and external calibration value, this method comprises:
Step 101, the calibration signal generated based on pre-set calibration source obtains the initial interior of the airborne interferometer
Calibration value；
In the embodiment of the present application, as an alternative embodiment, triggers pre-set calibration source and generate calibration signal, generate
Calibration signal by each channel of airborne interferometer, be transmitted to the receiver of airborne interferometer, receiver is according to received each
The calibration signal of channel transfer, is calculated, and initial internal calibration value is obtained.
In the embodiment of the present application, calibration signal about receiver according to received each channel transfer is calculated initial
Internal calibration value, for details, reference can be made to the relevant technologies processes, detailed description is omitted here.
In the embodiment of the present application, since airborne interferometer carries out direction finding using the phase difference of each antenna, thus, direction finding essence
Degree is influenced by antenna to inconsistency between each channel and channel, wherein inconsistency shows as signal-to-noise ratio and phase
Position error, both influences the confidence level of calibration value.For this purpose, the embodiment of the present application is directed to calibration value, statistics reflection calibration value
The signal-to-noise ratio of confidence level and phase fluctuation, and signal-to-noise ratio and phase fluctuation according to statistics to antenna to each channel and are led to
Inconsistency between road is calibrated, and proposes the confidence level that calibration value is promoted by statistics signal-to-noise ratio and phase fluctuation, this
Sample carries out calibration value calculating on the basis of antenna to consistency between each channel and channel, so that the school being calculated
Quasi- value high reliablity.
In the embodiment of the present application, the phase error of airborne interferometer is by component phase characteristic each in airborne interferometer
It is determined, wherein the characteristic, process water equality factor of component itself determine the phase stability and component of the component
Between phase equalization.Thus, airborne interferometer will obtain direction finding high-precision, need to carry out each channel phase alignment, disappear
The phase difference introduced except antenna, channel and component.
In the embodiment of the present application, the phase error of airborne interferometer consists of two parts: the phase of antenna to interchannel is missed
Phase error between difference, channel and channel and receiver.Wherein, the phase error between calibrated channel and channel and receiver is interior
Calibration, internal calibration is influenced by ambient temperature, and when variation of ambient temperature, phase error variations are big, in the embodiment of the present application, to eliminate
Influence of the environment temperature to phase carries out phase error calibration by configuring calibration source；The phase error of antenna to interchannel is steady
It is fixed, it is free from the influence of the external environment, in the embodiment of the present application, it is calibrated using radiating antenna, referred to as external calibration.
Step 102, it is based on the initial internal calibration value and the calibration signal, adjusts each logical of the airborne interferometer
Road；
In the embodiment of the present application, receiver believes the calibration that received each channel transfer comes according to initial internal calibration value
It number is handled, and each channel of airborne interferometer is safeguarded based on the signal that processing obtains, each channel is made to reach unanimity.
In the embodiment of the present application, as an alternative embodiment, it is based on the initial internal calibration value and the calibration signal,
Adjust each channel of the airborne interferometer, comprising:
A11, for each channel of airborne interferometer, according to the initial internal calibration value to the institute Jing Guo the channel transfer
It states calibration signal to be calibrated, obtains the first calibration signal, if the signal-to-noise ratio of first calibration signal is less than pre-set
Signal-to-noise ratio first threshold repairs the channel, until the signal-to-noise ratio of first calibration signal is not less than pre-set
Signal-to-noise ratio first threshold；
In the embodiment of the present application, the signal-to-noise ratio in channel can reflect the phase confidence level of calibration value, the signal-to-noise ratio in channel with
There are following relationships for phase error:
In formula,
Δ φ is the phase error in channel；
SNR is the signal-to-noise ratio in the channel.
When channel breaks down or is abnormal, the signal-to-noise ratio decline in the channel, from the above equation, we can see that, the phase error in the channel becomes
Greatly.Therefore, the signal-to-noise ratio in channel is counted, and sets snr threshold, by by the signal-to-noise ratio in channel and signal-to-noise ratio threshold
Value is compared, and can reflect whether the phase in the channel is normal indirectly, and carries out failure or abnormal reparation to abnormal channel,
It can be used as the reference standard of channel phases calibration validity.
In the embodiment of the present application, as an alternative embodiment, each channel can correspond to a snr threshold.Certainly, real
In the application of border, each channel in same airborne interferometer can also correspond to same snr threshold, the embodiment of the present application to this not
It limits.Calibration value can be the corresponding channel calibration value in each channel, and each channel being also possible in airborne interferometer is right
The calibration value answered.
A12 counts the phase fluctuation of first calibration signal, if the phase fluctuation of first calibration signal is greater than in advance
The phase fluctuation first threshold being first arranged repairs the corresponding channel of first calibration signal, until the phase in the channel
Position fluctuation is not more than pre-set phase fluctuation first threshold.
In the embodiment of the present application, by counting phase fluctuation, phase alignment confidence level can reflect.
In the embodiment of the present application, as an alternative embodiment, phase fluctuation is that the phase root mean square of the first calibration signal misses
Difference.
In the embodiment of the present application, phase root-mean-square error is calculated using following formula:
In formula,
ε is phase root-mean-square error；
N is the corresponding first calibration signal number in channel；
For the phase value of corresponding i-th of first calibration signals in channel；
For the phase average of corresponding first calibration signal in channel.
In the embodiment of the present application, when the phase fluctuation value (root-mean-square error) in a certain channel is more than phase fluctuation first threshold
When, it is believed that the channel needs to repair the channel there are failure, until the phase fluctuation value in the channel is lower than phase wave
Dynamic first threshold.
In the embodiment of the present application, as an alternative embodiment, the calibration signal includes the signal of multiple target frequency points, institute
The phase fluctuation for stating the first calibration signal is greater than pre-set phase fluctuation first threshold, comprising:
For each target frequency point, the phase fluctuation of the target frequency point is counted, if the phase fluctuation of the target frequency point is greater than
Pre-set phase fluctuation first threshold confirms that the phase fluctuation of first calibration signal is greater than pre-set phase wave
Dynamic first threshold.
Step 103, the airborne interferometer and the calibration signal based on channel adjusting, obtain the airborne Interference
The internal calibration value of instrument；
In the embodiment of the present application, as an alternative embodiment, the airborne interferometer that is adjusted based on channel and described
Calibration signal obtains the internal calibration value of the airborne interferometer, comprising:
The airborne interferometer and the calibration signal based on phase fluctuation adjustment, obtain the airborne interferometer
Internal calibration value.
In the embodiment of the present application, calibration signal is by the above-mentioned channel transfer adjusted by signal-to-noise ratio and phase fluctuation to connecing
Receipts machine, receiver are calculated according to received calibration signal, obtain internal calibration value.In this way, by carrying out signal-to-noise ratio to channel
Control and phase fluctuation control can lead to receiver to avoid the channel transfer calibration signal of failure or exception to receiver
The not high defect of the internal calibration value reliability and precision being calculated.
In the embodiment of the present application, the consistency between each channel can also be verified, can further promote interior school
The reliability and precision of quasi- value.The validity that internal calibration value is further examined using Validation Mode, for example, using calibration verification
Whether the phase difference of mode checking interchannel is effective, if the phase difference in each channel is zero, can be confirmed that airborne interferometer has reached
To phase equalization requirement, to meet the phase equalization requirement in channel after ensureing calibration, the high-precision of airborne interferometer is realized
Direction finding is spent, the validity for airborne interferometer calibration value provides reference standard.Thus, as another alternative embodiment, based on logical
The airborne interferometer and the calibration signal that road is adjusted, obtain the internal calibration value of the airborne interferometer, comprising:
A21, the channel and the calibration signal based on phase fluctuation adjustment, obtains in the airborne interferometer
Between internal calibration value；
In the embodiment of the present application, intermediate internal calibration value be it is above-mentioned based on phase fluctuation adjustment the airborne interferometer and
The calibration signal, the internal calibration value of the airborne interferometer of acquisition.
A22, for each channel of airborne interferometer, according to the intermediate internal calibration value to the institute Jing Guo the channel transfer
It states calibration signal to be calibrated, obtains the second calibration signal, if the phase difference of second calibration signal between each channel is big
In pre-set phase difference first threshold, the corresponding channel of second calibration signal is repaired, until the channel
Phase difference is not more than pre-set phase difference first threshold；
In the embodiment of the present application, the corresponding phase in each channel, the corresponding phase in two channels forms phase difference.In this way,
Verified by internal calibration so that the phase difference in each channel meet phase equalization requirement, thus promoted internal calibration reliability and
Precision.
A23, the airborne interferometer and the calibration signal based on adjusting offset, obtains the airborne interferometer
Internal calibration value.
In the embodiment of the present application, after the channel to airborne interferometer carries out adjusting offset again, internal calibration value is obtained.
In this way, under the calibration verification mode, receiver detects each channel using intermediate calibration value and connects by setting calibration verification mode
It is effective to demonstrate channel phases calibration if the phase in each channel meets coherence request for the phase of the collection of letters number.
Step 104, the calibration source is closed, emits school to the airborne interferometer using pre-set calibration radiation source
Quasi- radiation signal obtains the initial external calibration value of the airborne interferometer based on the internal calibration value；
Step 105, it is based on the initial external calibration value and the calibration radiation signal, adjusts the airborne interferometer
Antenna to each channel communication link；
In the embodiment of the present application, as an alternative embodiment, radiated based on the initial external calibration value and the calibration
Signal adjusts the antenna of the airborne interferometer to the communication link in each channel, comprising:
B11, for airborne interferometer antenna to each channel communication link, according to the initial external calibration value to warp
The calibration radiation signal for crossing the communication link and corresponding channel transfer is calibrated, and the first calibration radiation signal is obtained,
If the signal-to-noise ratio of the first calibration radiation signal is less than pre-set signal-to-noise ratio second threshold, which is repaired
It is multiple, until the signal-to-noise ratio of the second calibration radiation signal is not less than pre-set signal-to-noise ratio second threshold；
B12 counts the phase fluctuation of the first calibration radiation signal, if the phase wave of the first calibration radiation signal
It is dynamic to be greater than pre-set phase fluctuation second threshold, the corresponding communication link of the first calibration radiation signal is repaired
It is multiple, until the phase fluctuation of the communication link is not more than pre-set phase fluctuation second threshold.
Step 106, the airborne interferometer and the calibration radiation signal adjusted based on communication link, described in acquisition
The external calibration value of airborne interferometer.
In the embodiment of the present application, as an alternative embodiment, the airborne interferometer that is adjusted based on communication link and
The calibration radiation signal obtains the external calibration value of the airborne interferometer, comprising:
The communication link and the calibration signal based on phase fluctuation adjustment, obtain the outer of the airborne interferometer
Calibration value.
In the embodiment of the present application, as another alternative embodiment, the airborne interferometer that is adjusted based on communication link with
And the calibration radiation signal, obtain the external calibration value of the airborne interferometer, comprising:
B21 is obtained described airborne dry based on the communication link and the calibration radiation signal of phase fluctuation adjustment
The intermediate external calibration value of interferometer；
B22, for each channel of airborne interferometer, according to the intermediate external calibration value to by the communication link and right
The calibration radiation signal for the channel transfer answered is calibrated, and the second calibration radiation signal is obtained, if between each communication link
It is described second calibration radiation signal phase difference be greater than pre-set phase difference second threshold, to it is described second calibration radiate
The corresponding communication link of signal is repaired, until the phase difference of the communication link is not more than pre-set the second threshold of phase difference
Value；
B23, the communication link and the calibration radiation signal based on adjusting offset, obtains the airborne Interference
The external calibration value of instrument.
In the embodiment of the present application, is adjusted, can be disappeared by signal-to-noise ratio adjusting, phase fluctuation adjusting and phase difference consistency
Except the phase error of airborne interferometer, the signal parameter value in each channel reflects the true phase of signal, to can realize airborne
The accurate direction finding of interferometer.
In the embodiment of the present application, after obtaining airborne interferometer initial calibration value, signal-to-noise ratio, phase fluctuation statistical value are utilized
The confidence level for reflecting calibration value, judges whether initial calibration value is correct, and is directed to the corresponding channel of incorrect initial calibration value
Or communication link, reason is analyzed, after solving the problems, such as, again to progress calibration value calculating；Calibration verification mode is recycled, detection is each
Whether frequency point calibration value is effective, it is ensured that the phase equalization in each channel of airborne interferometer is met the requirements, and is obtained for airborne interferometer
High-precision direction finding ability provides important leverage.
In the embodiment of the present application, as an alternative embodiment, the external calibration value for obtaining the airborne interferometer it
Afterwards, this method further include:
The calibration source and the calibration radiation source are closed, the target emanation signal of target radiation source transmitting is received, is based on
The target emanation signal, the internal calibration value and the external calibration value carry out direction finding to the target radiation source.
Fig. 2 is the method flow schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer internal calibration value.Such as Fig. 2 institute
Show, this method comprises:
Step 201, the calibration signal generated based on pre-set calibration source obtains the initial interior of the airborne interferometer
Calibration value；
In the embodiment of the present application, any calibration value is initially not configured in airborne interferometer.
In the embodiment of the present application, as an alternative embodiment, calibration signal, calibration are generated using allocation of computer calibration source
Source transmitting calibration signal.
In the embodiment of the present application, each channel of airborne interferometer receives calibration signal respectively, and to received calibration signal
It is exported after being handled, receiver receives the calibration signal of each channel output, the phase information of calibration signal is extracted, according to extraction
Phase information generate initial internal calibration value.
Step 202, the calibration signal Jing Guo channel transfer is calibrated according to the initial internal calibration value, is obtained
First calibration signal；
Step 203, judge whether to be the signal-to-noise ratio for obtaining the first calibration signal, if so, step 204 is executed, if not
It is to execute step 206；
Step 204, judge whether the signal-to-noise ratio of the first calibration signal is less than signal-to-noise ratio first threshold, if so, executing step
Rapid 205, if it is not, executing step 206；
In the embodiment of the present application, the verifying of signal-to-noise ratio confidence level is carried out, the signal-to-noise ratio and signal-to-noise ratio of the first calibration signal are compared
The size of first threshold.
Step 205, which is repaired, returns to step 202；
In the embodiment of the present application, if the signal-to-noise ratio of the first calibration signal is less than signal-to-noise ratio first threshold, show that transmission should
The channel of calibration signal is repaired there are failure or exception, after repair, again depending on initial internal calibration value to process
The calibration signal of the channel transfer of reparation is calibrated.
In the embodiment of the present application, if the signal-to-noise ratio of the first calibration signal is not less than signal-to-noise ratio first threshold, show noise
It is proved to be successful than confidence level.
Step 206, judge whether the phase fluctuation of the first calibration signal is greater than phase fluctuation first threshold, if so, holding
Row step 207, if it is not, executing step 208；
In the embodiment of the present application, the phase fluctuation confidence level verifying of internal calibration value is carried out.
Step 207, the corresponding channel of the first calibration signal is repaired, returns to step 202；
Step 208, channel and calibration signal based on phase fluctuation adjustment, obtain intermediate internal calibration value；
In the embodiment of the present application, after repairing to channel, the channel for being again based on reparation obtains intermediate internal calibration value.
In the embodiment of the present application, in the verifying of signal-to-noise ratio confidence level and the verifying of phase fluctuation confidence level for completing internal calibration value
Afterwards, the verifying of internal calibration value is carried out.
Step 209, the calibration signal Jing Guo channel transfer is calibrated according to intermediate internal calibration value, obtains the second calibration
Signal；
Step 210, judge whether the phase difference of the second calibration signal between each channel is greater than phase difference first threshold, such as
Fruit is to execute step 211, if it is not, executing step 212；
Step 211, the corresponding channel of the second calibration signal is repaired, returns to step 209；
It in the embodiment of the present application, is verified by internal calibration value, if the phase difference in each channel meets phase one in signal parameter
Cause property requires, then shows that internal calibration is completed.
Step 212, airborne interferometer and calibration signal based on adjusting offset obtain internal calibration value.
In the embodiment of the present application, by internal calibration, the phase difference between channel and channel and receiver has been calibrated.
Fig. 3 is the method flow schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer external calibration value.Such as Fig. 3 institute
Show, this method comprises:
Step 301, calibration source is closed, is radiated and is believed to airborne interferometer transmitting calibration using pre-set calibration radiation source
Number, initial external calibration value is obtained based on internal calibration value；
In the embodiment of the present application, on the basis of obtaining internal calibration value, continue the acquisition and calibration of external calibration value.
Step 302, according to initial external calibration value to the calibration radiation signal transmitted by communication link and corresponding channel into
Row calibration, obtains the first calibration radiation signal；
Step 303, judge whether it is the signal-to-noise ratio for obtaining the first calibration radiation signal, if so, executing step 304, such as
Fruit is not to execute step 306；
Step 304, judge whether the signal-to-noise ratio of the first calibration radiation signal is less than signal-to-noise ratio second threshold, if so, holding
Row step 305, if it is not, executing step 306；
In the embodiment of the present application, the signal-to-noise ratio confidence level verifying of external calibration value is carried out, the first calibration radiation signal is compared
The size of signal-to-noise ratio and signal-to-noise ratio second threshold.
In the embodiment of the present application, as an alternative embodiment, signal-to-noise ratio second threshold can be with signal-to-noise ratio first threshold phase
Together, it can also be different.
Step 305, which is repaired, returns to step 302；
In the embodiment of the present application, if the signal-to-noise ratio of the first calibration radiation signal is less than signal-to-noise ratio second threshold, show to pass
The communication link of the defeated calibration radiation signal is repaired there are failure or exception, after repair, again depending on initial outer
Calibration value calibrates the calibration radiation signal of communication link and corresponding channel transmission by repairing.
In the embodiment of the present application, if the signal-to-noise ratio of the first calibration radiation signal is not less than signal-to-noise ratio second threshold, show
The signal-to-noise ratio confidence level of external calibration value is proved to be successful.
Step 306, judge whether the phase fluctuation of the first calibration radiation signal is greater than phase fluctuation second threshold, if
It is to execute step 307, if it is not, executing step 308；
In the embodiment of the present application, the phase fluctuation confidence level verifying of external calibration value is carried out.
In the embodiment of the present application, phase fluctuation second threshold can be identical as phase fluctuation first threshold, can also be different.
Step 307, the corresponding communication link of the first calibration radiation signal is repaired, returns to step 302；
Step 308, communication link and calibration radiation signal based on phase fluctuation adjustment, obtain intermediate external calibration value；
In the embodiment of the present application, after repairing to communication link, it is again based on the communication link and correspondence of reparation
Channel obtain intermediate external calibration value.
In the embodiment of the present application, after the verifying of signal-to-noise ratio confidence level and the verifying of phase fluctuation confidence level of completing external calibration value,
Carry out the verifying of external calibration value.
Step 309, according to intermediate external calibration value to the calibration radiation signal transmitted by communication link and corresponding channel into
Row calibration, obtains the second calibration radiation signal；
Step 310, judge whether the phase difference of the second calibration radiation signal between each channel is greater than the second threshold of phase difference
Value, if so, step 311 is executed, if it is not, executing step 312；
In the embodiment of the present application, the verifying of external calibration value is carried out, judges whether the phase in each channel meets phase equalization and want
It asks.
Step 311, the corresponding communication link of the second calibration radiation signal is repaired, returns to step 309；
Step 312, communication link and calibration signal based on adjusting offset obtain external calibration value.
In the embodiment of the present application, by external calibration, the phase error of antenna and interchannel has been calibrated.
In the embodiment of the present application, after completing internal calibration and external calibration, airborne interferometer phase equalization has met direction finding and has wanted
It asks, it can be achieved that high-precision direction finding.
Fig. 4 is the apparatus structure schematic diagram provided by the embodiments of the present application for obtaining airborne interferometer calibration value.Such as Fig. 4 institute
Show, the calibration value includes internal calibration value and external calibration value, which includes:
Initial internal calibration value obtains module 401, and the calibration signal for being generated based on pre-set calibration source obtains institute
State the initial internal calibration value of airborne interferometer；
Channel calibration module 402 is adjusted described airborne for being based on the initial internal calibration value and the calibration signal
Each channel of interferometer；
In the embodiment of the present application, as an alternative embodiment, channel calibration module 402 is specifically used for:
For each channel of airborne interferometer, according to the initial internal calibration value to the school Jing Guo the channel transfer
Calibration signal is calibrated, and the first calibration signal is obtained, if the signal-to-noise ratio of first calibration signal is less than pre-set noise
Than first threshold, which is repaired, until the signal-to-noise ratio of first calibration signal is not less than pre-set noise
Compare first threshold；
The phase fluctuation of first calibration signal is counted, is set in advance if the phase fluctuation of first calibration signal is greater than
The phase fluctuation first threshold set repairs the corresponding channel of first calibration signal, until the phase wave in the channel
It is dynamic to be not more than pre-set phase fluctuation first threshold.
In the embodiment of the present application, as an alternative embodiment, phase fluctuation is that the phase root mean square of the first calibration signal misses
Difference.
In the embodiment of the present application, phase root-mean-square error is calculated using following formula:
In formula,
ε is phase root-mean-square error；
N is the corresponding first calibration signal number in channel；
For the phase value of corresponding i-th of first calibration signals in channel；
For the phase average of corresponding first calibration signal in channel.
In the embodiment of the present application, the calibration signal includes the signal of multiple target frequency points, first calibration signal
Phase fluctuation is greater than pre-set phase fluctuation first threshold, comprising:
For each target frequency point, the phase fluctuation of the target frequency point is counted, if the phase fluctuation of the target frequency point is greater than
Pre-set phase fluctuation first threshold confirms that the phase fluctuation of first calibration signal is greater than pre-set phase wave
Dynamic first threshold.
In the embodiment of the present application, as another alternative embodiment, channel calibration module 402 is specifically used for:
The airborne interferometer and the calibration signal based on phase fluctuation adjustment, obtain the airborne interferometer
Internal calibration value.
Internal calibration value acquisition module 403, the airborne interferometer and the calibration signal for being adjusted based on channel,
Obtain the internal calibration value of the airborne interferometer；
In the embodiment of the present application, as an alternative embodiment, internal calibration value obtains module 403 and is specifically used for:
The channel and the calibration signal based on phase fluctuation adjustment, in the centre for obtaining the airborne interferometer
Calibration value；
For each channel of airborne interferometer, according to the intermediate internal calibration value to the school Jing Guo the channel transfer
Calibration signal is calibrated, and the second calibration signal is obtained, if the phase difference of second calibration signal between each channel is greater than in advance
The phase difference first threshold being first arranged repairs the corresponding channel of second calibration signal, until the phase in the channel
Difference is not more than pre-set phase difference first threshold；
The airborne interferometer and the calibration signal based on adjusting offset, obtain the interior of the airborne interferometer
Calibration value.
Initial external calibration value obtains module 404, for closing the calibration source, using pre-set calibration radiation source to
The airborne interferometer transmitting calibration radiation signal obtains the initial external calibration of the airborne interferometer based on the internal calibration value
Value；
Communication link calibration module 405 is adjusted for being based on the initial external calibration value and the calibration radiation signal
The antenna of the airborne interferometer to each channel communication link；
In the embodiment of the present application, as an alternative embodiment, communication link calibration module 405 is specifically used for:
For airborne interferometer antenna to each channel communication link, according to the initial external calibration value to by should
Communication link and the calibration radiation signal of corresponding channel transfer are calibrated, and the first calibration radiation signal are obtained, if institute
The signal-to-noise ratio for stating the first calibration radiation signal is less than pre-set signal-to-noise ratio second threshold, repairs to the communication link,
Until the signal-to-noise ratio of the second calibration radiation signal is not less than pre-set signal-to-noise ratio second threshold；
The phase fluctuation of the first calibration radiation signal is counted, if the phase fluctuation of the first calibration radiation signal is big
In pre-set phase fluctuation second threshold, the corresponding communication link of the first calibration radiation signal is repaired, directly
Phase fluctuation to the communication link is not more than pre-set phase fluctuation second threshold.
External calibration value obtains module 406, the airborne interferometer and the calibration for adjusting based on communication link
Radiation signal obtains the external calibration value of the airborne interferometer.
In the embodiment of the present application, as an alternative embodiment, external calibration value obtains module 406 and is specifically used for:
The communication link and the calibration signal based on phase fluctuation adjustment, obtain the outer of the airborne interferometer
Calibration value.
In the embodiment of the present application, as another alternative embodiment, external calibration value obtains module 406 and is specifically used for:
Based on the communication link and the calibration radiation signal of phase fluctuation adjustment, the airborne interferometer is obtained
Intermediate external calibration value；
For each channel of airborne interferometer, according to the intermediate external calibration value to by the communication link and corresponding
The calibration radiation signal of channel transfer is calibrated, and the second calibration radiation signal is obtained, if the institute between each communication link
The phase difference for stating the second calibration radiation signal is greater than pre-set phase difference second threshold, to the second calibration radiation signal
Corresponding communication link is repaired, until the phase difference of the communication link is not more than pre-set phase difference second threshold；
The communication link and the calibration radiation signal based on adjusting offset, obtain the airborne interferometer
External calibration value.
In the embodiment of the present application, as an alternative embodiment, the device further include:
Direction finding module (not shown) receives target emanation for closing the calibration source and the calibration radiation source
The target emanation signal of source transmitting, is based on the target emanation signal, the internal calibration value and the external calibration value, to the mesh
It marks radiation source and carries out direction finding.
As shown in figure 5, one embodiment of the application provides a kind of computer equipment 500, the acquisition for executing Fig. 1 is airborne
The method of interferometer calibration value, the equipment include memory 501, processor 502 and are stored on the memory 501 and can be at this
The computer program run on processor 502, wherein above-mentioned processor 502 realizes above-mentioned obtain when executing above-mentioned computer program
The step of taking the method for airborne interferometer calibration value.
Specifically, above-mentioned memory 501 and processor 502 can be general memory and processor, do not do have here
Body limits, and when the computer program of 502 run memory 501 of processor storage, is able to carry out above-mentioned acquisition airborne interferometer
The method of calibration value.
The method of acquisition airborne interferometer calibration value corresponding to Fig. 1, the embodiment of the present application also provides a kind of computers
Readable storage medium storing program for executing is stored with computer program on the computer readable storage medium, which is run by processor
The step of method of the above-mentioned acquisition airborne interferometer calibration value of Shi Zhihang.
Specifically, which can be general storage medium, such as mobile disk, hard disk, on the storage medium
Computer program when being run, the method for being able to carry out above-mentioned acquisition airborne interferometer calibration value.
In embodiment provided herein, it should be understood that disclosed device and method, it can be by others side
Formula is realized.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only one kind are patrolled
Function division is collected, there may be another division manner in actual implementation, in another example, multiple units or components can combine or can
To be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some communication interfaces, device or unit
It connects, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in embodiment provided by the present application can integrate in one processing unit, it can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) execute each embodiment the method for the application all or part of the steps.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing, in addition, term " the
One ", " second ", " third " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Finally, it should be noted that embodiment described above, the only specific embodiment of the application, to illustrate the application
Technical solution, rather than its limitations, the protection scope of the application is not limited thereto, although with reference to the foregoing embodiments to this Shen
It please be described in detail, those skilled in the art should understand that: anyone skilled in the art
Within the technical scope of the present application, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of the embodiment of the present application technical solution.The protection in the application should all be covered
Within the scope of.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of method for obtaining airborne interferometer calibration value, which is characterized in that the calibration value includes internal calibration value and outer
Calibration value, this method comprises:
Based on the calibration signal that pre-set calibration source generates, the initial internal calibration value of the airborne interferometer is obtained；
Based on the initial internal calibration value and the calibration signal, each channel of the airborne interferometer is adjusted；
The airborne interferometer adjusted based on channel and the calibration signal, obtain the internal calibration of the airborne interferometer
Value；
The calibration source is closed, using pre-set calibration radiation source to the airborne interferometer transmitting calibration radiation signal,
The initial external calibration value of the airborne interferometer is obtained based on the internal calibration value；
Based on the initial external calibration value and the calibration radiation signal, the antenna of the airborne interferometer is adjusted to each channel
Communication link；
Based on the airborne interferometer and the calibration radiation signal that communication link is adjusted, the airborne interferometer is obtained
External calibration value.
2. the method as described in claim 1, which is characterized in that described to be believed based on the initial internal calibration value and the calibration
Number, adjust each channel of the airborne interferometer, comprising:
For each channel of airborne interferometer, the calibration Jing Guo the channel transfer is believed according to the initial internal calibration value
It number is calibrated, obtains the first calibration signal, if the signal-to-noise ratio of first calibration signal is less than pre-set signal-to-noise ratio the
One threshold value repairs the channel, until the signal-to-noise ratio of first calibration signal is not less than pre-set signal-to-noise ratio the
One threshold value；
The phase fluctuation of first calibration signal is counted, if the phase fluctuation of first calibration signal is greater than pre-set
Phase fluctuation first threshold repairs the corresponding channel of first calibration signal, until the phase fluctuation in the channel is not
Greater than pre-set phase fluctuation first threshold.
3. method according to claim 2, which is characterized in that the calibration signal includes the signal of multiple target frequency points, institute
The phase fluctuation for stating the first calibration signal is greater than pre-set phase fluctuation first threshold, comprising:
For each target frequency point, the phase fluctuation of the target frequency point is counted, if the phase fluctuation of the target frequency point is greater than in advance
The phase fluctuation first threshold of setting confirms that the phase fluctuation of first calibration signal is greater than pre-set phase fluctuation the
One threshold value.
4. the method as described in claim 1, which is characterized in that the airborne interferometer adjusted based on channel and institute
Calibration signal is stated, the internal calibration value of the airborne interferometer is obtained, comprising:
The airborne interferometer and the calibration signal based on phase fluctuation adjustment, obtain the interior school of the airborne interferometer
Quasi- value.
5. the method as described in claim 1, which is characterized in that the airborne interferometer adjusted based on channel and institute
Calibration signal is stated, the internal calibration value of the airborne interferometer is obtained, comprising:
The channel and the calibration signal based on phase fluctuation adjustment, obtain the intermediate internal calibration of the airborne interferometer
Value；
For each channel of airborne interferometer, the calibration Jing Guo the channel transfer is believed according to the intermediate internal calibration value
It number is calibrated, obtains the second calibration signal, set in advance if the phase difference of second calibration signal between each channel is greater than
The phase difference first threshold set repairs the corresponding channel of second calibration signal, until the phase difference in the channel is not
Greater than pre-set phase difference first threshold；
The airborne interferometer and the calibration signal based on adjusting offset, obtain the internal calibration of the airborne interferometer
Value.
6. the method as described in claim 1, which is characterized in that described to be based on the initial external calibration value and the calibration spoke
Signal is penetrated, adjusts the antenna of the airborne interferometer to the communication link in each channel, comprising:
For airborne interferometer antenna to each channel communication link, according to the initial external calibration value to pass through the communication
Link and the calibration radiation signal of corresponding channel transfer are calibrated, and the first calibration radiation signal is obtained, if described
The signal-to-noise ratio of one calibration radiation signal is less than pre-set signal-to-noise ratio second threshold, repairs to the communication link, until
The signal-to-noise ratio of the second calibration radiation signal is not less than pre-set signal-to-noise ratio second threshold；
The phase fluctuation of the first calibration radiation signal is counted, if the phase fluctuation of the first calibration radiation signal is greater than in advance
The phase fluctuation second threshold being first arranged is repaired the corresponding communication link of the first calibration radiation signal, until should
The phase fluctuation of communication link is not more than pre-set phase fluctuation second threshold.
7. method as claimed in claim 6, which is characterized in that it is described based on communication link adjust the airborne interferometer with
And the calibration radiation signal, obtain the external calibration value of the airborne interferometer, comprising:
The communication link and the calibration signal based on phase fluctuation adjustment, obtain the external calibration of the airborne interferometer
Value.
8. method as claimed in claim 6, which is characterized in that it is described based on communication link adjust the airborne interferometer with
And the calibration radiation signal, obtain the external calibration value of the airborne interferometer, comprising:
Based on the communication link and the calibration radiation signal of phase fluctuation adjustment, obtain in the airborne interferometer
Between external calibration value；
For each channel of airborne interferometer, according to the intermediate external calibration value to by the communication link and corresponding channel
The calibration radiation signal of transmission is calibrated, and the second calibration radiation signal is obtained, if described the between each communication link
The phase difference of two calibration radiation signals is greater than pre-set phase difference second threshold, corresponding to the second calibration radiation signal
Communication link repaired, until the communication link phase difference be not more than pre-set phase difference second threshold；
The communication link and the calibration radiation signal based on adjusting offset, obtain the outer school of the airborne interferometer
Quasi- value.
9. method as claimed in any one of claims 1 to 8, which is characterized in that obtain the outer of the airborne interferometer described
After calibration value, the method also includes:
The calibration source and the calibration radiation source are closed, the target emanation signal of target radiation source transmitting is received, based on described
Target emanation signal, the internal calibration value and the external calibration value carry out direction finding to the target radiation source.
10. a kind of device for obtaining airborne interferometer calibration value, which is characterized in that the calibration value includes internal calibration value and outer
Calibration value, the device include:
Initial internal calibration value obtains module, and the calibration signal for being generated based on pre-set calibration source is obtained described airborne
The initial internal calibration value of interferometer；
Channel calibration module adjusts the airborne interferometer for being based on the initial internal calibration value and the calibration signal
Each channel；
Internal calibration value obtains module, and the airborne interferometer and the calibration signal for being adjusted based on channel obtain institute
State the internal calibration value of airborne interferometer；
Initial external calibration value obtains module, for closing the calibration source, using pre-set calibration radiation source to the machine
Interferometer transmitting calibration radiation signal is carried, the initial external calibration value of the airborne interferometer is obtained based on the internal calibration value；
Communication link calibration module adjusts the machine for being based on the initial external calibration value and the calibration radiation signal
The antenna of interferometer is carried to the communication link in each channel；
External calibration value obtains module, the airborne interferometer and calibration radiation letter for being adjusted based on communication link
Number, obtain the external calibration value of the airborne interferometer.
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