CN109547050A - A kind of Digital Arrays real time calibration device and method - Google Patents
A kind of Digital Arrays real time calibration device and method Download PDFInfo
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- CN109547050A CN109547050A CN201811469396.9A CN201811469396A CN109547050A CN 109547050 A CN109547050 A CN 109547050A CN 201811469396 A CN201811469396 A CN 201811469396A CN 109547050 A CN109547050 A CN 109547050A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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Abstract
The present invention relates to a kind of Digital Arrays real time calibration device and methods, belong to Radar Technology field, and device includes digital array antenna, calibration assemblies, transmitting-receiving subassembly, coupling calibration feeding network and data handling component；Data handling component controls calibration assemblies and generates reception calibration signal, obtains receiving calibration data through overcoupling calibration feeding network, digital array antenna, transmitting-receiving subassembly；Data handling component controls transmitting-receiving subassembly and generates transmitting calibration signal, obtains transmitting calibration coupled signal by digital array antenna, coupling calibration feeding network, calibration assemblies；Data handling component calculates the sending and receiving channel compensation for calibrating errors data of Digital Arrays according to calibration data and transmitting calibration data are received.The present invention is the channel calibration tape of equipment the reliable scheme that automates, is solved because of brings inconsistencies such as the batch sex differernce, device temperature drift, the ageing of performance that design, manufacture, can the adaptively replacement of equipment, the variation of environment.
Description
Technical field
The present invention relates to signal processing technology field, especially a kind of Digital Arrays real time calibration device and method.
Background technique
As the development of chip technology, high-speed sampling, transmission and processing apparatus is getting faster, this also accelerates Radar Technology
Development, becomes increasingly easy use of the Digital Phased Array technology in radar, also more and more common.Using the Digital Phased Array
Technology, key point seek to mutually calibrate the width of each radio-frequency channel, guarantee the power signal in each channel when transmitting in sky
Between be effectively synthesized, guarantee to receive the design direction figure drafted after the road Shi Ge signal is really aligned, therefore calibration of amplitude and phase skill
Art is most important.
Current existing solution is main or the calibration of Digital Arrays is solved in such a way that the external space couples, and selectes
Existing service aisle transmitting, other channel receptions, correct the transmitting-receiving in each channel by way of mutually transmitting；This side
Case framework is simple, cost is low, but the accuracy calibrated is not high and is difficult to improve, because being easy by Space Coupling by sky
Between signal interference, be easy to be influenced by the spatial distribution position of each oscillator, be easy the difference that is mutually distributed by the width of oscillator itself
Property influence.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of Digital Arrays real time calibration device and method, realizes each radio frequency
Influence of spatial distribution is rejected in effective calibration of channel width facial difference, oscillator itself influences, raising measurement accuracy.
The purpose of the present invention is mainly achieved through the following technical solutions:
At a kind of Digital Arrays real time calibration device, including digital array antenna, TR component, coupling calibration feeding network and data
Manage component；
The TR component includes calibration assemblies and transmitting-receiving subassembly；
The data handling component controls the calibration assemblies and generates reception calibration signal；It is calibrated and is fed by the coupling
Network is coupled to each antenna oscillator of digital array antenna；The transmitting-receiving subassembly is connect with each antenna oscillator, is received and processed
The reception calibration signal of each antenna oscillator coupling, output receive calibration data to the data handling component；
The data handling component controls the transmitting-receiving subassembly generation transmitting calibration signal to each antenna of digital array antenna
Oscillator；The coupling calibrates feeding network and is sent to the calibration assemblies, institute from antenna oscillator acquisition transmitting calibration coupled signal
State calibration assemblies processing transmitting calibration coupled signal, output transmitting calibration data to the data handling component；
The data handling component calculates the transmitting of Digital Arrays according to the reception calibration data and transmitting calibration data that receive
With receiving channel compensation for calibrating errors data.
Further, the inside of the digital array antenna, including function branch school standard is arranged in the coupling calibration feeding network
Feeding network；
The quasi- feeding network in function branch school passes through coupling line and each channel oscillator of antenna with Xiang Gongfen mode using constant amplitude
Electrical feed-throughs are coupled.
Further, further include independent RF calibration channel, add coupling calibration feeding network and calibration assemblies it
Between, it is used for transmission the reception calibration signal or transmitting calibration coupled signal.
Further, the calibration assemblies, be arranged in the TR component internal, the calibration assemblies include: transmit-receive switch,
Receiving branch, transmitting branch and pretreatment and interface circuit；
The transmit-receive switch, for receiving branch or transmitting branch to be coupled school with described by the RF calibration channel
Quasi- feeding network connection；
The receiving branch, for successively carrying out clipping, filtering, low noise amplification to received transmitting calibration coupled signal
After AD sampling, transmitting calibration data are obtained；
The transmitting branch receives calibration signal successively after amplification, filtering and clipping for generating, sends out through transmit-receive switch
It is sent to the coupling calibration feeding network.
The pretreatment and interface circuit respectively connect the transmitting branch and receiving branch and the data handling component
It connects, for providing synchronous communication clock, control signal and data channel for the transmitting branch and receiving branch, and is the number
Communication interface is provided according to processing component.
Further, the data handling component is connect with the calibration assemblies, for generating described in control instruction control
Transmitting branch, which generates, in calibration assemblies receives calibration signal, and receives the transmitting calibration that receiving branch exports in the calibration assemblies
Data；
The data handling component is connect with the transmitting-receiving subassembly, generates transmitting calibration letter for controlling the transmitting-receiving subassembly
Number, and receive the reception calibration data of the component output；
The data handling component calculates to receive and emit and lead to according to the reception calibration data and transmitting calibration data received
Road compensation for calibrating errors data.
A kind of Digital Arrays real-time calibration method, comprising the following steps:
Step S501, it is automatically decided whether to initiate calibration according to the working condition of radar host computer, it is then straight if necessary to calibrate
It connects control equipment and enters align mode；
Step S502, according to scheduled timing carry out transmitting calibration or/and receive calibrate, obtain transmitting calibration data or/
With reception calibration data；
Step S503, the transmitting calibration data are handled or/and receive calibration data, calculate transmitting or/and receiving channel
Compensation for calibrating errors data carry out real-time compensation calibration to the transmission channel of Digital Arrays or/and reception signal respectively.
Further, the emission calibrating method includes:
1) transmission channel of transmitting-receiving subassembly is selected to send transmitting calibration signal；The selection covering of the transmission channel is all logical
Road carries out jump choosing according to pseudorandom mode；And the frequency point selection for emitting signal covers all frequency points, and according to pseudorandom
Mode carry out jump choosing；
2) coupling calibration feeding network obtains transmitting calibration coupled signal from the oscillator of transmitting signal, passes through RF calibration
Channel is sent to calibration assemblies；
3) calibration assemblies receive transmitting calibration coupled signal, and successively carry out clipping, filtering, low noise amplification and AD sampling
Afterwards, transmitting calibration data are obtained；
4) according to the calibration serial number of current alignment, channel number, frequency point number, operating temperature and transmitting calibration data, knot
It closes history offset data and antenna coupled characteristic data forms data structure and are output to data handling component.
Further, the reception calibration method includes:
1) calibration assemblies, which generate, receives each day that calibration signal is coupled to digital array antenna by coupling calibration feeding network
Linear oscillator；Wherein, the receiving channel of all transmitting-receiving subassemblies carries out reception calibration simultaneously, and receives the frequency point selection covering of calibration
All frequency points carry out jump choosing according to pseudorandom mode；
2) the reception calibration signal that each oscillator of antenna is coupled by feeding network, is output to reception group in transmitting-receiving subassembly
Each radio-frequency channel of part；
3) it after each radio-frequency channel receives received coupled signal, digitized and pre-processed, obtains receiving calibration
Data；
4) according to the calibration serial number of current alignment, channel number, frequency point number, operating temperature and reception calibration data, knot
It closes history offset data and antenna coupled characteristic data forms data structure and are output to data handling component.
Further, same data processing algorithm is used to the transmitting calibration data and reception calibration data；
It specifically includes:
Step S601, from the input data structure body of data handling component, some optional channel is in some frequency point
Calibration data is pre-processed；The preprocess method includes:
The maximum and minimum value of all data during rejecting primary calibration；
It averages to the remaining data after rejecting most value；
Step S602, according to the validity of the mean value, judge whether to be recalibrated, it is no, then enter next
Step；It is then to be recalibrated to the channel in the frequency point, obtains calibration data and repeat to judge validity, effectively, then under entering
One step；It is invalid then judge the channel calibrate failure；
Step S603, it repeats the above steps, calculates mean data of all channels under all frequency points in Digital Arrays；
Step S604, all channels are calculated in the compensation for calibrating errors data under same frequency point: all channels under to same frequency point
Mean data poor are asked to all channels on the basis of some channel, obtain width phase difference, the width phase difference is each channel
Current alignment offset data under the frequency point；
Step S605, change calibration frequency point, repeat the above steps, calculate all channels working as under each calibration frequency point
Preceding compensation for calibrating errors data.
Further, further include that otherness processing is carried out to current offset data, specifically include:
Step S701, current alignment offset data is compared with corresponding history offset data, judge whether be more than
Otherness threshold value receives it if being no more than as correct calibration data；If it does, then carrying out in next step；
Step S702, benefit school is carried out to the calibration result for being more than otherness threshold value, and the current alignment behind benefit school is compensated
Data are compared with corresponding history offset data again, are judged whether to be more than otherness threshold value, be received if being no more than
It is correct calibration data；If it does, then carrying out in next step；
Step S703, difference processing is carried out to current alignment offset data, looks first at the amplitude item in calibration data, if
Amplitude is more than preset amplitude to threshold value to difference, then on the contrary reporting channel mistake is then receiving this group of data becomes newly correct
Calibration data；
Step S704, according to antenna coupled characteristic data, compensation data is carried out to correct calibration data, eliminates antenna coupling
Influence, obtain the offset data of channel characteristics；
Step S705, data structure is formed according to channel number, frequency point number, operating temperature and the new offset data
Body carries out data output.
The present invention has the beneficial effect that:
The present invention is to be suitable for a variety of application environments such as radar, communication, confrontation, can be come for the channel calibration tape of equipment automatic
The reliable scheme changed is solved because the brings such as the batch sex differernce, device temperature drift, the ageing of performance that design, manufacture are different
Cause property, can the replacement of adaptive equipment, the variation of environment, guarantee the performance of equipment always automatically in reliable state.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is that the Digital Arrays real time calibration device in the embodiment of the present invention forms connection schematic diagram；
Fig. 2 is that feeding network composition connection schematic diagram is calibrated in the coupling in the embodiment of the present invention；
Fig. 3 is that the calibration assemblies in the embodiment of the present invention form connection schematic diagram；
Fig. 4 is that the data handling component in the embodiment of the present invention forms connection schematic diagram；
Fig. 5 is the Digital Arrays real-time calibration method flow chart in the embodiment of the present invention；
Fig. 6 is the calibration data Processing Algorithm flow chart in the embodiment of the present invention；
Fig. 7 is the otherness Processing Algorithm flow chart in the embodiment of the present invention.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention.
The embodiment of the invention discloses a kind of Digital Arrays real time calibration devices, as shown in Figure 1, in the Digital Arrays of conventional form
On the basis of, increase coupling calibration feeding network, RF calibration channel, calibration assemblies and data handling component；
Coupling calibration feeding network, adds the inside in traditional digital array antenna；
RF calibration channel is added between traditional TR and antenna；
Calibration assemblies are added in TR component internal, and making TR component includes calibration assemblies and transmitting-receiving subassembly；
Data handling component is connect with calibration assemblies；
Specifically, coupling calibration feeding network is connect with each channel oscillator of antenna in digital array antenna, it is used for each vibration
Son feeding receives calibration signal or obtains transmitting calibration coupled signal from each oscillator；And by increasing on the interface of digital array antenna
The separate calibrations channel interface added is connect with RF calibration channel；
RF calibration channel is independent radiofrequency signal designated lane, for the transmission of calibration signal, using designated lane
It can exclude various unexpected interference；
Calibration assemblies are connect with RF calibration channel, on the one hand, receive calibration radiofrequency signal through RF calibration for generating
Channel transfer calibrates feeding network to coupling；On the other hand, simultaneously for the transmitting calibration coupled signal of receiving RF channel feedback
Carry out the data handling component that digital sample is sent to rear end later；
Data handling component is connect with the calibration assemblies and transmitting-receiving subassembly being arranged in TR component；
Specifically, the data handling component is connect with calibration assemblies, controls the calibration assemblies and generate to receive to calibrate and believe
Number；It is coupled to each antenna oscillator of digital array antenna by the coupling calibration feeding network；The transmitting-receiving subassembly and the day
Linear oscillator connection, receives and processes the reception calibration signal that the antenna states coupling, and output receives calibration data to the data
Processing component；
The data handling component is connect with transmitting-receiving subassembly, is controlled the transmitting-receiving subassembly and is generated transmitting calibration signal to number
Each antenna oscillator of array antenna；The coupling calibrates feeding network and is sent to institute from antenna oscillator acquisition transmitting calibration coupled signal
Calibration assemblies are stated, the calibration assemblies handle transmitting calibration coupled signal, and output transmitting calibration data are output at the data
Manage component；
The data handling component calculates the transmitting of Digital Arrays according to the reception calibration data and transmitting calibration data that receive
With receiving channel compensation for calibrating errors data.
Special, in order to which exclusive PCR and lower false-alarm improve the confidence level calibrated, the data handling component of the present embodiment
Also the true Transceiver Features parameter calibrated every time is all retained, big data association process, filter are carried out by multiple calibration
Except unnecessary interference, guarantee the confidence level of calibration.
Optionally, the Digital Arrays real time calibration device of the present embodiment further includes monitor terminal, the monitor terminal and data
Processing component connection, the calibration process or result data of processing component for receiving data, it is convenient to calibration process and result into
Row monitoring.
Preferably, as shown in Fig. 2, coupling calibration feeding network include calibrated channel interface, the quasi- feeding network in function branch school and
Coupling line；
Calibrated channel interface connects the quasi- feeding network in function branch school, and the quasi- feeding network in function branch school is each logical by coupling line and antenna
Road oscillator electrical feed-throughs are coupled；Each channel oscillator of antenna uses direct feed；
Special, on the one hand, quasi- feeding network use in function branch school etc. is secondary will be defeated from calibrated channel interface with Xiang Gongfen mode
The reception calibration signal entered, is respectively coupled in the electrical feed-throughs of each oscillator by coupling line；On the other hand, function branch school standard is fed
Network is coupled by coupling line obtains each channel emission calibration coupled signal of antenna, and feedback to calibrated channel interface exports.
Preferably, as shown in figure 3, the calibration assemblies of the present embodiment include transmit-receive switch, receiving branch, transmitting branch and pre-
Processing and interface circuit；
Transmit-receive switch, for receiving branch or transmitting branch to be attached with RF calibration channel；
Receiving branch, including limiter, filter, low noise short-circuiting device and AD sample circuit, feed back to through transmit-receive switch
Transmitting calibration coupled signal successively carry out clipping, filtering, low noise amplification and AD sampling after, obtain transmitting calibration data；
Transmitting branch, including limiter, filter, amplifier and DDS circuit；DDS circuit under control of the control signal,
It generates reception calibration source signal and is sent to RF calibration channel through transmit-receive switch successively after amplification, filtering and clipping；
Special, the reception calibration source signal that DDS circuit generates can be but be not limited to a frequency source or broad band source, output wave
Shape can be but not limited to continuous wave or pulse, and control can be adjusted in every output parameter by PERCOM peripheral communication；
Pretreatment and interface circuit are connect with transmitting branch and receiving branch respectively, for providing synchronous communication clock, control
Signal processed and data channel, and communication interface (such as GTX, optic communication, LVDS, kilomega network are provided for the data handling component of rear end
Deng), mainly controlling DDS according to the order of Back end data processing component generates waveform signal output, receives the sampled data of AD simultaneously
To sampled data carry out Digital Down Convert, filtering, sampling, pulse judgement etc. operation, and pulse data transmitted to
The data handling component of rear end；
Optionally, it is made of FPGA/DSP, clock, interface communication circuitry (such as GTX, fiber optic communication)；
Preferably, as shown in figure 4, the data handling component of the present embodiment includes interface adapter circuit, core processing circuit
With peripheral data storage circuit；
Wherein, core processing circuit can be realized using kinds of schemes such as FPGA, DSP, PPC, as long as there is enough data
Processing capacity is just.
In core processing circuit, the calibration data in each calibration process that real-time reception is fed back by calibration assemblies, and
ARRAY PROCESSING is carried out to data, obtains the Transceiver Features in each channel；Further according to the characteristic pair of the antenna couple feed network
The Transceiver Features of each antenna channels compensate, and obtain the true Transceiver Features of each antenna channels.
The present embodiment also discloses a kind of Digital Arrays real-time calibration method, as shown in figure 5, including the following steps:
Step S501, it is automatically decided whether to initiate calibration according to the working condition of radar host computer, it is then straight if necessary to calibrate
It connects control equipment and enters align mode；
Specifically, the data handling component according to radar host computer working condition include current operating temperature, it is current
Factors such as working frequency, operating time etc. automatically decide whether to initiate calibration according to these status informations；For example, when work frequency
Rate changes, temperature change is more than 10 °, operating time is more than that 4h must be calibrated again, is switched on or restarted
Journey must also be calibrated.
Step S502, according to scheduled timing carry out transmitting calibration or/and receive calibrate, obtain transmitting calibration data or/
With reception calibration data；
Calibration includes transmitting calibration and receives calibration, in timing control, can arbitrarily determine on demand and only carry out transmitting mark
Quasi- or reception calibration carries out reception calibration after perhaps first carrying out transmitting calibration or otherwise carries out.
For the present embodiment first to carry out transmitting calibration, the sequence for then carrying out receiving calibration executes calibration；
It is specific as follows:
Transmitting calibration step: calibration assemblies receive the transmitting information of the transmitting-receiving subassembly transmission channel from TR component, and carry out
The data handling component of rear end is sent to after digitlization and pretreatment by digital interface；
Because calibration assemblies and transmitting-receiving subassembly to the channel between aerial array are all transmit-receive sharings (in transmitting-receiving subassembly and school
The output end of prospective component is switched over by switch), therefore transmitting-receiving subassembly is in emission state, calibration during transmitting calibration
Component is in reception state.
It specifically includes:
1) transmission channel of transmitting-receiving subassembly is selected to send transmitting calibration signal；
Specifically, the selection of the transmission channel covers all channels, jump choosing is carried out according to pseudorandom mode；And it sends out
The frequency point selection for penetrating signal covers all frequency points, and carries out jump choosing according to pseudorandom mode；
2) coupling calibration feeding network obtains transmitting calibration coupled signal from the oscillator of transmitting signal, passes through RF calibration
Channel is sent to calibration assemblies；
3) calibration assemblies receive transmitting calibration coupled signal, and successively carry out clipping, filtering, low noise amplification and AD sampling
Afterwards, transmitting calibration data are obtained；
4) according to the calibration serial number of current alignment, channel number, frequency point number, operating temperature and transmitting calibration data, knot
It closes history offset data and antenna coupled characteristic data forms data structure and are output to data handling component.
Receive calibration steps: calibration assemblies generate calibration signal, and connecing for TR component is sent to after coupling by antenna oscillator
After receipts component carries out reception processing, it is sent to the data handling component of rear end；
Because calibration assemblies and transmitting-receiving subassembly to the channel between aerial array are all transmit-receive sharings (in transmitting-receiving subassembly and school
The output end of prospective component is switched over by switch), therefore transmitting-receiving subassembly is in reception state, calibration during receiving calibration
Component is in emission state.
It specifically includes:
1) calibration assemblies, which generate, receives each day that calibration signal is coupled to digital array antenna by coupling calibration feeding network
Linear oscillator；
Specifically, the receiving channel of all transmitting-receiving subassemblies carries out reception calibration simultaneously, and receive the frequency point selection of calibration
All frequency points are covered, carry out jump choosing according to pseudorandom mode；
2) the reception calibration signal that each oscillator of antenna is coupled by feeding network, is output to reception group in transmitting-receiving subassembly
Each radio-frequency channel of part；
3) it after each radio-frequency channel receives received coupled signal, digitized and pre-processed, obtains receiving calibration
Data；
4) according to the calibration serial number of current alignment, channel number, frequency point number, operating temperature and reception calibration data, knot
It closes history offset data and antenna coupled characteristic data forms data structure and are output to data handling component.
Special, include in data structure:
Calibrate the serial number layout that serial number begins from booting to all previous calibration；
Channel number is the TR channel number of transmitting-receiving subassembly；
Frequency point number is the working frequency points number of system；
Operating temperature is the internal operating temperature of transmitting-receiving subassembly；
Current alignment data are newest calibration data；
Historical calibration data is passing calibration data；
Antenna coupled characteristic data are that the width of calibration port to the other each ports inside aerial array is coupled data
(by the intrinsic physical characteristic difference of antenna array design therefore, calibration test can be carried out by Network Analyzer).
Special, primary calibration process, calibration number will guarantee that each frequency point in each channel is at least corrected 3 times；When certain
Benefit school, and at least 3 times are carried out when a channel, certain frequency point data exception.
Specifically, data handling component will control the calibration frequency point of pre-processing assembly and lead to during primary calibration
Road, allow each channel carried out under each frequency point 3 times calibration (as when 1 frequency point 1 of channel completion primary calibration after, data processing
Component sends 1 frequency point 1 of command triggers channel to pre-processing assembly and carries out second and for the third time calibration again, and so on, it completes
The calibration in all channels and all frequency points)；Data handling component will be handled the calibration data that pre-processing assembly is sent, first
First maximum and minimum value all during rejecting primary calibration, then average to remaining data, if mean value is much smaller than theoretical meter
Calculation value (by theoretical calibration data value is calculated at the beginning of designing according to circuit design), then current alignment data may wrong need
Re-graduation is carried out, the calibration process in the channel and frequency point is repeated, calibrates again, data appoint judgement if so mistake should after mending school
Calibrate failure in channel.
Step S503, the transmitting calibration data are handled or/and receive calibration data, calculate transmitting or/and receiving channel
Compensation for calibrating errors data carry out real-time compensation calibration to the transmission channel of Digital Arrays or/and reception signal respectively.
Further, the true transmitting-receiving for the confidence level that exclusive PCR and lower false-alarm improve calibration, to calibrating every time
Characterisitic parameter will be retained, and carry out big data by multiple calibration and be associated with to obtain otherness processing, pass through multiple calibration
Unnecessary interference is filtered out, guarantees the confidence level of calibration.
Preferably, same data processing algorithm is used to the transmitting calibration data and reception calibration data；
It is specific as shown in Figure 6, comprising:
Step S601, from the input data structure body of data handling component, some optional channel is in some frequency point
Calibration data is pre-processed；The preprocess method includes:
The maximum and minimum value of all data during rejecting primary calibration；
It averages to most value rear end volume remaining data is rejected；
Step S602, according to the validity of the mean value, judge whether to be recalibrated, it is no, then enter next
Step；It is then to be recalibrated to the channel in the frequency point, obtains calibration data and repeat to judge validity, effectively, then under entering
One step；It is invalid then judge the channel calibrate failure；
Step S603, it repeats the above steps, calculates mean data of all channels under all frequency points in Digital Arrays；
Step S604, all channels are calculated in the compensation for calibrating errors data under same frequency point: all channels under to same frequency point
Mean data poor are asked to all channels on the basis of some channel, obtain width phase difference, the width phase difference is each channel
Current alignment offset data under the frequency point；
Step S605, change calibration frequency point, repeat the above steps, calculate all channels working as under each calibration frequency point
Preceding compensation for calibrating errors data
Special, it further include that otherness processing is carried out to current offset data, as shown in fig. 7, specifically including:
Step S701, current alignment offset data is compared with corresponding history offset data, judge whether be more than
Otherness threshold value receives it if being no more than as correct calibration data；If it does, then carrying out in next step；
Step S702, benefit school is carried out to the calibration result for being more than otherness threshold value, and the current alignment behind benefit school is compensated
Data are compared with corresponding history offset data again, are judged whether to be more than otherness threshold value, be received if being no more than
It is correct calibration data；If it does, then carrying out in next step；
Step S703, difference processing is carried out to current alignment offset data, looks first at the amplitude item in calibration data, if
Amplitude is more than preset amplitude to threshold value to difference, then on the contrary reporting channel mistake is then receiving this group of data becomes newly correct
Calibration data；
Step S704, according to antenna coupled characteristic data, compensation data is carried out to correct calibration data, eliminates antenna coupling
Influence, obtain the offset data of channel characteristics；
Step S705, data structure is formed according to channel number, frequency point number, operating temperature and the new offset data
Body carries out data output.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of Digital Arrays real time calibration device, which is characterized in that including digital array antenna, TR component, coupling calibration transmission network
Network and data handling component；
The TR component includes calibration assemblies and transmitting-receiving subassembly；
The data handling component controls the calibration assemblies and generates reception calibration signal；Feeding network is calibrated by the coupling
It is coupled to each antenna oscillator of digital array antenna；The transmitting-receiving subassembly is connect with each antenna oscillator, receives and processes each institute
The reception calibration signal of antenna oscillator coupling is stated, output receives calibration data to the data handling component；
The data handling component controls the transmitting-receiving subassembly generation transmitting calibration signal to each antenna oscillator of digital array antenna；
The coupling calibrates feeding network and is sent to the calibration assemblies, the calibration from antenna oscillator acquisition transmitting calibration coupled signal
Component handles transmitting calibration coupled signal, output transmitting calibration data to the data handling component；
The data handling component calculates the transmitting of Digital Arrays and connects according to the reception calibration data and transmitting calibration data that receive
Receive channel compensation for calibrating errors data.
2. Digital Arrays real time calibration device according to claim 1, which is characterized in that the coupling calibration feeding network is set
It sets in the inside of the digital array antenna, including the quasi- feeding network in function branch school；
The quasi- feeding network in function branch school passes through the feed of coupling line and each channel oscillator of antenna using constant amplitude with Xiang Gongfen mode
Access is coupled.
3. Digital Arrays real time calibration device according to claim 1, which is characterized in that further include that independent RF calibration is logical
Road is added between coupling calibration feeding network and calibration assemblies, is used for transmission the reception calibration signal or transmitting calibration coupling
Close signal.
4. Digital Arrays real time calibration device according to claim 1 to 3, which is characterized in that the calibration assemblies, if
It sets in the TR component internal, the calibration assemblies include: transmit-receive switch, receiving branch, transmitting branch and pretreatment and interface
Circuit；
The transmit-receive switch, for receiving branch or transmitting branch to be coupled calibration feedback with described by the RF calibration channel
Electric network connection；
The receiving branch, for successively carrying out clipping, filtering, low noise amplification and AD to received transmitting calibration coupled signal
After sampling, transmitting calibration data are obtained；
The transmitting branch receives calibration signal successively after amplification, filtering and clipping for generating, is sent to through transmit-receive switch
Feeding network is calibrated in the coupling.
The transmitting branch and receiving branch are connect by the pretreatment and interface circuit with the data handling component respectively, are used
In providing synchronous communication clock, control signal and data channel for the transmitting branch and receiving branch, and at the data
It manages component and communication interface is provided.
5. Digital Arrays real time calibration device according to claim 1 to 3, which is characterized in that the data handling component
It connect with the calibration assemblies, believes for generating control instruction and controlling transmitting branch in the calibration assemblies and generate to receive to calibrate
Number, and receive the transmitting calibration data that receiving branch exports in the calibration assemblies；
The data handling component is connect with the transmitting-receiving subassembly, generates transmitting calibration signal for controlling the transmitting-receiving subassembly,
And receive the reception calibration data of the component output；
The data handling component is calculated and is received and transmission channel school according to the reception calibration data and transmitting calibration data received
Quasi- offset data.
6. a kind of Digital Arrays real-time calibration method, which comprises the following steps:
Step S501, it is automatically decided whether to initiate calibration according to the working condition of radar host computer, then directly be controlled if necessary to calibration
Control equipment enters align mode；
Step S502, it carries out transmitting calibration or/and receives to calibrate according to scheduled timing, obtain transmitting calibration data or/and connect
Close alignment data；
Step S503, the transmitting calibration data are handled or/and receive calibration data, calculate transmitting or/and receiving channel calibration
Offset data carries out real-time compensation calibration to the transmission channel of Digital Arrays or/and reception signal respectively.
7. Digital Arrays real-time calibration method according to claim 6, which is characterized in that the emission calibrating method includes:
1) transmission channel of transmitting-receiving subassembly is selected to send transmitting calibration signal；The selection of the transmission channel covers all channels,
Jump choosing is carried out according to pseudorandom mode；And the frequency point selection for emitting signal covers all frequency points, and according to pseudorandom
Mode carries out jump choosing；
2) coupling calibration feeding network obtains transmitting calibration coupled signal from the oscillator of transmitting signal, passes through RF calibration channel
It is sent to calibration assemblies；
3) calibration assemblies receive transmitting calibration coupled signal, and successively after progress clipping, filtering, low noise amplification and AD sampling,
Obtain transmitting calibration data；
4) according to the calibration serial number of current alignment, channel number, frequency point number, operating temperature and transmitting calibration data, in conjunction with going through
History offset data and antenna coupled characteristic data form data structure and are output to data handling component.
8. Digital Arrays real-time calibration method according to claim 6, which is characterized in that the reception calibration method includes:
1) calibration assemblies, which generate, receives each antenna vibration that calibration signal is coupled to digital array antenna by coupling calibration feeding network
Son；Wherein, the receiving channel of all transmitting-receiving subassemblies carries out reception calibration simultaneously, and the frequency point selection covering for receiving calibration is all
Frequency point, carry out jump choosing according to pseudorandom mode；
2) the reception calibration signal that each oscillator of antenna is coupled by feeding network, is output to receiving unit in transmitting-receiving subassembly
Each radio-frequency channel；
3) it after each radio-frequency channel receives received coupled signal, digitized and pre-processed, obtains receiving calibration data；
4) according to the calibration serial number of current alignment, channel number, frequency point number, operating temperature and calibration data is received, in conjunction with going through
History offset data and antenna coupled characteristic data form data structure and are output to data handling component.
9. according to Digital Arrays real-time calibration method as claimed in claim 6 to 8, which is characterized in that the transmitting calibration number
Same data processing algorithm is used according to reception calibration data；
It specifically includes:
Step S601, from the input data structure body of data handling component, some optional channel is calibrated in some frequency point
Data are pre-processed；The preprocess method includes:
The maximum and minimum value of all data during rejecting primary calibration；
It averages to the remaining data after rejecting most value；
Step S602, according to the validity of the mean value, judge whether to be recalibrated, it is no, then enter in next step；
It is then to be recalibrated to the channel in the frequency point, obtains calibration data and repeat to judge that validity effectively then enters next
Step；It is invalid then judge the channel calibrate failure；
Step S603, it repeats the above steps, calculates mean data of all channels under all frequency points in Digital Arrays；
Step S604, calculate all channels in the compensation for calibrating errors data under same frequency point: all channels is equal under to same frequency point
Value Data asks poor to all channels on the basis of some channel, obtains width phase difference, and the width phase difference is each channel at this
Current alignment offset data under frequency point；
Step S605, change calibration frequency point, repeat the above steps, calculate current school of all channels under each calibration frequency point
Quasi- offset data.
10. Digital Arrays real-time calibration method according to claim 9, which is characterized in that further include to current offset data
Otherness processing is carried out, is specifically included:
Step S701, current alignment offset data is compared with corresponding history offset data, judges whether to be more than difference
Property threshold value, receive it if being no more than as correct calibration data；If it does, then carrying out in next step；
Step S702, benefit school is carried out to the calibration result for being more than otherness threshold value, and to the current alignment offset data behind benefit school
It is compared again with corresponding history offset data, judges whether to be more than otherness threshold value, receiving it if being no more than is
Correct calibration data；If it does, then carrying out in next step；
Step S703, difference processing is carried out to current alignment offset data, the amplitude item in calibration data is looked first at, if amplitude
It is more than preset amplitude to threshold value to difference, then on the contrary reporting channel mistake is then receiving this group of data becomes correct calibration newly
Data；
Step S704, according to antenna coupled characteristic data, compensation data is carried out to correct calibration data, eliminates the shadow of antenna coupling
It rings, obtains the offset data of channel characteristics；
Step S705, according to channel number, frequency point number, operating temperature and the new offset data formed data structure into
The output of row data.
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