CN108549058A - Secondary radar broadband active phased array system and dynamic calibration method thereof - Google Patents
Secondary radar broadband active phased array system and dynamic calibration method thereof Download PDFInfo
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- CN108549058A CN108549058A CN201810164782.0A CN201810164782A CN108549058A CN 108549058 A CN108549058 A CN 108549058A CN 201810164782 A CN201810164782 A CN 201810164782A CN 108549058 A CN108549058 A CN 108549058A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
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Abstract
The invention provides a secondary radar broadband active phased array system and a dynamic calibration method thereof, wherein the method comprises the following steps: after receiving a calibration request instruction, transmitting broadband first radio frequency signals under different preset working conditions to each antenna unit through each channel in the active phased array so as to carry out transmission dynamic calibration on the channels in the active phased array; and after receiving the calibration request instruction, receiving broadband second radio frequency signals under different preset working conditions from each antenna unit so as to perform receiving dynamic calibration on the channels in the active phased array. The invention can realize the rapid change of the constant wave beam and the vector weight coefficient of the low side lobe, thereby realizing the dynamic calibration of the receiving and transmitting channel.
Description
Technical field
The invention belongs to secondary radar technical fields, specifically, more particularly to a kind of secondary radar broadband active it is phased
Array 1 system and its dynamic calibration method.
Background technology
Secondary radar broadband active phased array is controlled by the wave beam of active phased array system into row of channels, to close in the air
At launching beam and receive wave beam.Since antenna index has key effect to the performance of entire secondary radar system, to ensure
It designs the Sidelobe of wave beam, improve resolution capability, need combine antenna and radio-frequency channel when designing antenna beam index
The characteristics of system and use environment carry out the distribution into row index.Amplitude to ensure the multiple channels of active phased array is consistent with phase
Property, it needs to calibrate the receiving channel and transmission channel of active phased array, to obtain good performance design index.It is secondary
Radar system is when receiving signal, in addition to receiving normal target echo, that is, desired signal, can also receive reflection signal etc. simultaneously
Interference signal.Interference signal is superimposed with desired signal, can influence the detection to echo signal.When secondary radar is handled,
It needs to extract desired signal, to obtain the parameter information of target.
Existing secondary radar broadband active phased array is generally using only progress broadband initial calibration, wide band calibration in booting
Parameter especially gain general range it is larger, generally no longer carry out calibration after the completion of initial calibration.Channel generally uses
Transmitting-receiving control, deposits intercoupling between channels, additionally, due to the passage equipment operating temperature of working time, operating point,
Channel amplitude, channel phases etc. can change, and the conformity error of channel amplitude and channel phases is caused to change, due to
The conformity error of channel amplitude and channel phases changes, and can make beam position, transmitting and receiving signal level, sidelobe level etc.
Variation, causes error big, influences the detection performance of secondary radar system.
Invention content
In order to solve the above problem, the present invention provides a kind of secondary radar broadband active phased array system and its dynamic calibrations
Method, constant wave beam and vector weight coefficient to realize Sidelobe quickly change, and then realize the dynamic school of transceiver channel
It is accurate.
According to an aspect of the invention, there is provided a kind of secondary radar active phased array dynamic calibration method, including：
After receiving calibration request instruction, emitted not to each antenna element by each channel in the active phased array
With the first radiofrequency signal of broadband under preset operating conditions, to pass through the broadband of any channel emission in the active phased array
On the basis of one radiofrequency signal, emit the amplitude and phase of the first radiofrequency signal of broadband by rest channels based on pre-defined rule adjustment
It is added with weight vector, to carry out transmitting dynamic calibration to the channel in the active phased array；And/or
After receiving calibration request instruction, receives the broadband second under different preset operating conditions from each antenna element and penetrate
Frequency signal, in by the active phased array on the basis of the second radiofrequency signal of broadband of any channel reception, based on pre- set pattern
The amplitude and phase for the second radiofrequency signal of broadband that then adjustment is received by rest channels are added with weight vector, with to the active phase
Channel in control battle array carries out reception dynamic calibration.
According to one embodiment of present invention, with broadband the first radio frequency letter of any channel emission in the active phased array
On the basis of number, amplitude and phase complex weighting based on the first radiofrequency signal of broadband that pre-defined rule adjustment is emitted by rest channels
Vector is further comprised with carrying out transmitting dynamic calibration to the channel in the active phased array：
Under preset operating conditions, the broadband first for obtaining all channel emissions in the active phased array respectively is penetrated
The amplitude and phase of frequency signal；
Using in the active phased array by the amplitude and phase of the first radiofrequency signal of broadband of any channel emission as base
Standard, based on the minimum rule of useful synthesis power maximum interference and the constant rule of range, adjustment passes through described in rest channels transmitting
The amplitude and phase of the first radiofrequency signal of broadband are added with weight vector, so that the amplitude of the first radiofrequency signal of broadband of channel emission
Keep wave beam constant within a predetermined range after deviation and phase deviation adjustment；
Based on after adjustment amplitude and phase be added with weight vector generate respective channel wave beam control code；
The launching beam of respective channel is controlled according to the wave beam control code；
Under all preset operating conditions, it is based on predetermined order, all channels are emitted respectively according to above method
Dynamic calibration.
According to one embodiment of present invention, when carrying out transmitting dynamic calibration to the channel in the active phased array,
The on off state and signal sequence for controlling each channel only have one when so that emitting first radiofrequency signal of broadband each time
A channel is in emission state.
According to one embodiment of present invention, it is penetrated with the broadband second of any channel reception in the active phased array
On the basis of frequency signal, the amplitude of the second radiofrequency signal of broadband received by rest channels is adjusted based on pre-defined rule and phase is answered
Weight vectors are further comprised with carrying out reception dynamic calibration to the channel in the active phased array：
Under preset operating conditions, the broadband second for obtaining all channel receptions in the active phased array respectively is penetrated
The amplitude and phase of frequency signal；
On the basis of in the active phased array by the amplitude and phase of the second radiofrequency signal of any channel reception, base
In the minimum rule of useful synthesis power maximum interference and the constant rule of range, adjusts the broadband second received by rest channels and penetrate
The amplitude and phase of frequency signal are added with weight vector, so that the amplitude error and phase deviation of the second radiofrequency signal of channel reception
Make wave beam constant within a predetermined range after adjustment；
Based on after adjustment amplitude and phase be added with weight vector generate respective channel wave beam control code；
The reception wave beam of respective channel is controlled according to the wave beam control code；
Under all preset operating conditions, it is based on predetermined order, all channels are received respectively according to above method
Dynamic calibration.
According to one embodiment of present invention, when carrying out reception dynamic calibration to the channel in the active phased array,
The on off state and timing control in each channel are controlled, only there are one logical when so that receiving the second radiofrequency signal of broadband each time
Road is in reception state.
According to another aspect of the present invention, a kind of secondary radar active phased array system is additionally provided, including：
Aerial array, configured with the mutiple antennas unit that is arranged in array, for emitting the first radiofrequency signal of broadband, or
Receive the second radiofrequency signal of broadband；
Channel array, configured with the one-to-one channel of each antenna element in the aerial array, for institute
Aerial array transmitting the first radiofrequency signal of broadband is stated, or from second radiofrequency signal of antenna array receiver broadband；
Calibration source is configured to be of coupled connections with each channel in the channel array, is receiving calibration request instruction
Afterwards, it is used to receive the broadband that the antenna array receiver is used for by the first radiofrequency signal of broadband of each channel emission and emitting
Two radiofrequency signals；
Signal processing alignment unit is configured to after receiving calibration request instruction, to pass through the active phased array
In any channel emission the first radiofrequency signal of broadband on the basis of, rest channels transmitting broadband the is passed through based on pre-defined rule adjustment
The amplitude and phase of one radiofrequency signal are added with weight vector, to carry out transmitting dynamic calibration to the channel in the active phased array；
Or in by the active phased array on the basis of the second radiofrequency signal of broadband of any channel reception, based on predetermined
The amplitude and phase for the second radiofrequency signal of broadband that rule adjustment is received by rest channels are added with weight vector, with to described active
Channel in phased array carries out reception dynamic calibration.
According to one embodiment of present invention, the calibration source further comprises：
Receiving module is configured to be of coupled connections with each channel in the channel array, passes through each channel for receiving
The first radiofrequency signal of broadband and/or transmitting the second radiofrequency signal of broadband of transmitting；
Memory module is configured to the amplitude and phase of the second radiofrequency signal of the first radiofrequency signal of stored wide band and broadband
Position, default operating condition, channel initial distribution value, lane testing value；
Standard channel is configured for receiving the first radiofrequency signal of the broadband and transmitting connects for the aerial array
The second radiofrequency signal of broadband of receipts；
Standard antenna is configured to carry out the second emission of radio frequency signals of broadband so that aerial array is received.
According to one embodiment of present invention, the signal processing alignment unit further comprises：
Monitoring modular is configured to monitor the performance affecting parameters in all channels, and is monitoring performance affecting parameters hair
When changing, the calibration request instruction is sent out；
Computing module is configured to the amplitude and phase of the first radiofrequency signal of broadband according to each channel emission, or receives
The second radiofrequency signal of broadband amplitude and phase, calculate respective channel amplitude error and phase deviation adjustment after keep wave beam permanent
Determine within a predetermined range；
Channel calibration module is configured under all preset operating conditions, with by any in the active phased array
On the basis of the amplitude and phase of the first radiofrequency signal of broadband of channel emission, based on the minimum rule of useful synthesis power maximum interference
With the constant rule of range, the amplitude and phase for adjusting the first radiofrequency signal of broadband emitted by rest channels are added with weight vector,
So that Beam synthesis is constant, deviation is within a predetermined range；
Or on the basis of in the active phased array by the amplitude and phase of the second radiofrequency signal of any channel reception,
Based on the minimum rule of useful synthesis power maximum interference and the constant rule of range, the broadband second received by rest channels is adjusted
The amplitude complex weighting vector sum phase of radiofrequency signal is added with weight vector, so that Beam synthesis is constant, deviation is within a predetermined range；
Control code forms module, and the amplitude and phase after adjustment of being configured to are added with weight vector and generate wave beam control
Code controls the launching beam of respective channel or reception wave beam according to the wave beam control code.
According to one embodiment of present invention, further include：
Fault detection unit is configured to according to the first radiofrequency signal of broadband of the transmitting in each channel and by each channel
The detection of the second radiofrequency signal of broadband of reception, determines whether each channel breaks down；
Redundant configuration unit is configured to when having detected that channel is broken down, and the system is accessed in redundant channel
To replace faulty channel.
According to one embodiment of present invention, further include：
Control unit is configured to be configured the preset operating conditions of the system and to the signal sequence in channel
It is controlled；
Power Management Unit, is configured to according to different preset operating conditions, and sequential is carried out to the power supply in each channel
Control and control system of switching on or off electricity.
Beneficial effects of the present invention：
The present invention considers to influence the factor of transceiver channel performance, be carried out to the calibration of amplitude and phase of each transceiver channel in system
The measures such as dynamic calibration, the processing of constant wave beam, power supply and signal sequence control are quickly changed and are received and dispatched by vector weight coefficient
The dynamic calibration in channel forms the constant wave beam of Sidelobe, improves the pointing accuracy of wave beam.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and is obtained in claim and attached drawing.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, required in being described below to embodiment
Attached drawing does simple introduction：
Fig. 1 is a kind of secondary radar active phase system construction drawing according to an embodiment of the invention；
Fig. 2 is a kind of secondary radar active phased array dynamic calibration method flow according to an embodiment of the invention
Figure.
Specific implementation mode
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to be applied to the present invention whereby
Technological means solves technical problem, and the realization process for reaching technique effect can fully understand and implement.It needs to illustrate
As long as not constituting conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other,
It is formed by technical solution within protection scope of the present invention.
Meanwhile in the following description, for illustrative purposes and numerous specific details are set forth, to provide to of the invention real
Apply the thorough understanding of example.It will be apparent, however, to one skilled in the art, that the present invention can not have to tool here
Body details or described ad hoc fashion are implemented.
In addition, step shown in the flowchart of the accompanying drawings can be in the department of computer science of such as a group of computer-executable instructions
It is executed in system, although also, logical order is shown in flow charts, and it in some cases, can be to be different from herein
Sequence execute shown or described step.
First embodiment
According to an aspect of the invention, there is provided a kind of secondary radar active phased array system, according to as shown in Figure 1
A kind of secondary radar active phase system construction drawing of one embodiment of the present of invention to carry out the present invention below with reference to Fig. 1
It is described in detail.
As shown in Figure 1, the secondary radar active phased array system, including aerial array, channel array, calibration source and signal
Handle alignment unit.Wherein, antenna array configuration has the mutiple antennas unit being arranged in array, for emitting the first radio frequency of broadband
Signal, or receive the second radiofrequency signal of broadband.The first radiofrequency signal of broadband herein indicates each antenna element hair in aerial array
The broadband rf signal penetrated emits identical broadband first by each antenna element and penetrates when carrying out channel emission state calibration
Frequency signal.Similarly, the second radiofrequency signal of broadband indicates the broadband rf signal that each antenna element receives in aerial array.
Channel array be configured with the one-to-one channel of each antenna element in aerial array, for aerial array send out
Penetrate the first radiofrequency signal of broadband, or from the second radiofrequency signal of antenna array receiver broadband.Lead to specifically, an antenna element corresponds to one
Road.Due to the influence of various factors, amplitude and phase of the same radiofrequency signal after each channel transfer can change.So
The first radiofrequency signal of broadband by each channel transfer, and by respective antenna unit emit after the first radiofrequency signal of broadband phase
It can change with amplitude.
Calibration source is configured to connect with each coupling channel in channel array, after receiving calibration request instruction, is used for
Receive the second radiofrequency signal of broadband for antenna array receiver by the first radiofrequency signal of broadband and transmitting of each channel emission.
Specifically, calibration source is connect with each channel coupling unit in channel array, when calibration：It is received in emission state by each logical
The first radiofrequency signal of broadband after road coupling, the second radiofrequency signal of broadband is emitted in reception state.
Signal processing alignment unit is configured to after receiving calibration request instruction, with by any logical in active phased array
On the basis of the first radiofrequency signal of broadband of road transmitting, the first radio frequency of broadband letter is emitted by rest channels based on pre-defined rule adjustment
Number amplitude and phase be added with weight vector, to carry out transmitting dynamic calibration to the channel in active phased array.Although specifically, logical
Identical the first radiofrequency signal of broadband of each channel emission is crossed, but due to the influence of itself of each channel, first radiofrequency signal of broadband
It can change by the phase and amplitude after respective channel.Similarly, pass through identical the second radio frequency of broadband of each channel reception
Signal, since the phase and amplitude of the influence of itself of each channel, second radiofrequency signal of broadband can also change.At the signal
Reason alignment unit is exactly to carry out transmitting calibration to the signal of each channel transfer and receive to calibrate to carry out signal processing, for controlling battle array
The amplitude-phase consistency index of row channel transmission signal, realize launching beam and receive wave beam Sidelobe and beam direction it is quick
Change, ensures the performance of antenna beam, improve the performance of system.
In one embodiment of the invention, the calibration source further comprise receiving module, memory module, standard channel and
Standard antenna.Wherein, receiving module is configured to connect with each coupling channel in channel array, for receiving through each channel
The first radiofrequency signal of broadband and transmitting the second radiofrequency signal of broadband of transmitting.Memory module is configured to what storage receiving module received
The amplitude and phase of the first radiofrequency signal of broadband of each channel emission and the second radiofrequency signal of broadband of transmitting, default work shape
The parameters such as state, channel initial distribution value, lane testing value.Standard channel is configured to transmitting for receiving the first radiofrequency signal of broadband
With the second radiofrequency signal of broadband for emitting the antenna array receiver.Standard antenna is configured to transmitting the second radiofrequency signal of broadband,
So that aerial array is received.That is, the calibration source is for receiving signal to be calibrated, the standard letter of transmitting test
Number.
In one embodiment of the invention, which further comprises monitoring modular, computing module, channel
Calibration module and control code form module.Wherein, monitoring modular is configured to monitor the performance affecting parameters in all channels, and is supervising
When measuring performance affecting parameters and changing, calibration request instruction is sent out.Specifically, monitoring temperature, working frequency, work
State etc. influences the parameter of channel performance, and when monitoring that these parameters change, monitoring modular sends out channel calibration and refers to
It enables.The Each part of system proceeds by channel calibration after receiving the calibration command.
Computing module is configured to according to the first radiofrequency signal of broadband of each channel emission or the broadband second of each channel reception
Radiofrequency signal calculates the amplitude and phase in each channel, calculate respective channel amplitude error and phase deviation adjustment after make wave beam
It is constant within a predetermined range.
Channel calibration module is configured under all preset operating conditions, to pass through any channel emission in active phased array
The first radiofrequency signal of broadband amplitude and phase on the basis of, based on the minimum rule of useful synthesis power maximum interference and range perseverance
Then, the amplitude and phase for adjusting the first radiofrequency signal of broadband of channel emission are added with weight vector to set pattern, so that channel emission
Keep wave beam constant within a predetermined range after amplitude error and the phase deviation adjustment of the first radiofrequency signal of broadband；Or with active phase
On the basis of amplitude and phase in battle array by the second radiofrequency signal of any channel reception, it is based on useful synthesis power maximum interference
Minimum rule and the constant rule of range, the amplitude and phase for adjusting the second radiofrequency signal of broadband received by rest channels are added with
Weight vector, so that keeping wave beam constant predetermined after the amplitude error of the second radiofrequency signal of channel reception and phase deviation adjustment
In range.
Specifically, channel calibration module is constant predetermined to be based on the minimum rule of useful synthesis power maximum interference and wave beam
Be constraints in range, amplitude and phase based on transmitting or the radiofrequency signal received and with reference channel amplitude and phase
Deviation modeled, be added with weight vector to obtain the amplitude of radiofrequency signal and phase in each channel.Then useful conjunction is utilized
The minimum rule of success rate maximum interference and wave beam are constant multiple to the amplitude and phase in each channel for constraints within a predetermined range
Weight vectors are adjusted so that keep wave beam constant within a predetermined range after amplitude error and the phase deviation adjustment in each channel.
Control code forms the amplitude that module is configured to after adjustment and phase is added with weight vector and generates wave beam control code, root
The launching beam of respective channel or reception wave beam are controlled according to wave beam control code.
In one embodiment of the invention, which further includes fault detection unit and redundant configuration unit.Specifically,
Fault detection unit is configured to the second radiofrequency signal of broadband of the first radiofrequency signal of broadband and reception according to each channel emission
Detection, determines whether each channel breaks down.Redundant configuration unit is configured to when having detected that channel is broken down, by redundancy
The system is accessed to replace faulty channel in channel.In this way, by establishing redundancy transceiver channel, the stalwartness of system can be improved
Property.
In one embodiment of the invention, which further includes control unit and Power Management Unit.Wherein, control is single
Member is configured to be configured the preset operating conditions of system, such as can be to the operating mode of system, working condition, work frequency
Rate, energy distribution, the signal degree of coupling, vector weighting etc. are configured.
When the preset operating conditions of system change, the calibration in channel, the broadband first of generation should be re-started
The second radiofrequency signal of radiofrequency signal and broadband, can be different according to the format of the signals such as pattern, working condition.
Power Management Unit is configured to according to different preset operating conditions, and timing control is carried out to the power supply in each channel
And control system of switching on or off electricity, to be conducive to the control to each channel.
The present invention considers the factor of influence transceiver channel performance, is emitted and received width mutually school to each channel in system
Standard, the constant wave beam and vector weight coefficient that can form Sidelobe quickly change, to realize the dynamic calibration in channel.
Second embodiment
According to another aspect of the present invention, a kind of secondary radar active phased array dynamic calibration method is additionally provided, such as
Fig. 2 show a kind of secondary radar active phased array dynamic calibration method flow chart according to an embodiment of the invention, with
This method is described in detail in lower reference chart 2.
In step s 110, after receiving calibration request instruction, by each channel in active phased array to each antenna
Unit emits the first radiofrequency signal of broadband under different preset operating conditions, to pass through any channel emission in active phased array
On the basis of the first radiofrequency signal of broadband, emit the amplitude of the first radiofrequency signal of broadband by rest channels based on pre-defined rule adjustment
It is added with weight vector with phase, to carry out transmitting dynamic calibration to the channel in active phased array.Specifically, being asked receiving calibration
After asking instruction, the first radiofrequency signal of identical broadband is emitted by each channel in active phased array respectively.
In general, when system boot works, control unit is first to system merging working condition, operating mode, antenna point
The arrange parameters such as cloth parameter, the degree of coupling.Signal processing alignment unit carries out including control channel and address distribution, array element after receiving
The configurations such as number, array element spacing, and read related data from the configuration file of memory.Control unit is to working condition, work
It while operation mode etc. is configured, is shown to the information such as being arranged and handling, convenient for progress such as effect, the figures of calibration
It grasps, adjusts the parameters such as different working conditions, operating mode, operating point, make system according to the flow of setting to entire front
Channel calibrated.
Transmitting dynamic calibration is carried out to the channel in active phased array later, controls the on off state and signal in each channel
Sequential is only in emission state when so that emitting the first radiofrequency signal of broadband each time there are one channel.It can reduce in this way
Coupling influence between channel.
When carrying out transmitting dynamic calibration to the channel in active phased array, following steps are specifically included.First, pre-
If under operating condition, obtaining the amplitude and phase of the first radiofrequency signal of broadband of all channel emissions in active phased array respectively.
The first radiofrequency signal of broadband indicates the radiofrequency signal that each antenna element is sent out in aerial array, and in transmitting calibration, each day
Line unit emits identical the first radiofrequency signal of broadband.
Then, using in active phased array by the amplitude and phase of the first radiofrequency signal of broadband of any channel emission as base
Standard adjusts the first radio frequency of broadband of channel emission based on the minimum rule of useful synthesis power maximum interference and the constant rule of range
The amplitude and phase of signal are added with weight vector, so that the amplitude error of the first radiofrequency signal of broadband of channel emission and phase are inclined
Keep wave beam constant within a predetermined range after difference adjustment.
Specifically, channel calibration module is to be based on the minimum rule of useful synthesis power maximum interference and the constant rule of range
Constraints is modeled based on the amplitude and phase that receive radiofrequency signal and with the deviation of reference channel amplitude and phase,
Amplitude and phase to obtain each the first radiofrequency signal of channel middle width strip are added with weight vector.Then using being added with weight vector to each
The amplitude and phase in channel are adjusted so that keep wave beam constant within a predetermined range after amplitude error and phase deviation adjustment.
Then, the wave beam control that weight vector generates respective channel is added with based on the amplitude complex weighting vector sum phase after adjustment
Code.
Then, the launching beam of respective channel is controlled according to wave beam control code.
Finally, under all preset operating conditions, it is based on predetermined order, transmitting dynamic calibration is completed according to above method.
Calibration while can sense channel whether failure, if faulty channel occur, enable redundant channel, again into
Calibration is re-started after row parameter configuration again.
In the step s 120, after receiving calibration request instruction, different preset operating conditions are received from each antenna element
Under the second radiofrequency signal of broadband, in by active phased array on the basis of the second radiofrequency signal of broadband of any channel reception,
The amplitude of the second radiofrequency signal of broadband received by rest channels is adjusted based on pre-defined rule and phase is added with weight vector, with right
Channel in active phased array carries out reception dynamic calibration.
Usually system boot work, and to system components carry out parameter setting after, receiving calibration request instruction
Reception dynamic calibration is carried out to channel afterwards.When carrying out reception dynamic calibration to the channel in active phased array, to pass through active phase
It controls in battle array on the basis of the second radiofrequency signal of broadband of any channel reception, the broadband second of channel reception is adjusted based on pre-defined rule
The amplitude and phase of radiofrequency signal are added with weight vector, to carry out reception dynamic calibration to the channel in active phased array.
When carrying out reception dynamic calibration to the channel in active phased array, the on off state and signal in each channel are controlled
Sequential is only in reception state there are one channel when so that receiving the second radiofrequency signal of broadband each time, can reduce in this way
Coupling influence between channel.
When carrying out reception dynamic calibration to the channel in active phased array, following steps are specifically included.First, pre-
If under operating condition, obtaining the amplitude and phase of the second radiofrequency signal of broadband of all channel receptions in active phased array respectively.
The second radiofrequency signal of broadband indicates the radiofrequency signal that each antenna element receives in aerial array.
Then, on the basis of in active phased array by the amplitude and phase of the second radiofrequency signal of any channel reception,
Based on the minimum rule of useful synthesis power maximum interference and the constant rule of range, the second radiofrequency signal of broadband of channel reception is adjusted
Amplitude and phase be added with weight vector so that the amplitude error of the second radiofrequency signal of channel reception and phase deviation adjustment after
Keep wave beam constant within a predetermined range.
Specifically, channel calibration module is to be based on the minimum rule of useful synthesis power maximum interference and the constant rule of range
Constraints, amplitude and phase based on the second radiofrequency signal of all broadbands by each channel reception and with reference channel width
The deviation of degree and phase is modeled, and weight vector is added with to obtain the amplitude of radiofrequency signal and phase in each receiving channel.So
Keep wave beam constant within a predetermined range using being added with weight vector and be adjusted to the amplitude and phase in each channel afterwards.
Then, based on after adjustment amplitude and phase be added with weight vector generate respective channel wave beam control code.
Then, the reception wave beam of respective channel is controlled according to wave beam control code.
Finally, under all preset operating conditions, it is based on predetermined order, completes to receive dynamic calibration according to above method.
Calibration while can sense channel whether failure, if faulty channel occur, enable redundant channel, again into
Calibration is re-started after row parameter configuration again.
The sequence of step S110 and step S120 can be interchanged, and the specific step that executes can be set according to working condition
It is fixed.
The present invention considers to influence the factor of transceiver channel performance, based on the minimum rule of useful synthesis power maximum interference and wave
Shu Hengding carries out calibration of amplitude and phase to each channel in system within a predetermined range, and the constant wave beam and vector of Sidelobe may be implemented
Weight coefficient quickly changes, and to realize the dynamic calibration in channel, improves beam-pointing accuracy.
It should be understood that disclosed embodiment of this invention is not limited to processing step disclosed herein, and should prolong
Reach the equivalent substitute for these features that those of ordinary skill in the related art are understood.It is to be further understood that using herein
Term be used only for the purpose of describing specific embodiments, and be not intended to limit.
" one embodiment " or " embodiment " mentioned in specification means the special characteristic described in conjunction with the embodiments, structure
Or characteristic includes at least one embodiment of the present invention.Therefore, the phrase " reality that specification various places throughout occurs
Apply example " or " embodiment " the same embodiment might not be referred both to.
While it is disclosed that embodiment content as above but described only to facilitate understanding the present invention and adopting
Embodiment is not limited to the present invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of secondary radar active phased array dynamic calibration method, including：
It is different pre- to the transmitting of each antenna element by each channel in the active phased array after receiving calibration request instruction
If the first radiofrequency signal of broadband under operating condition, to be penetrated by the broadband first of any channel emission in the active phased array
On the basis of frequency signal, the amplitude of the first radiofrequency signal of broadband is emitted by rest channels based on pre-defined rule adjustment and phase is added with
Weight vector, to carry out transmitting dynamic calibration to the channel in the active phased array；And/or
After receiving calibration request instruction, broadband the second radio frequency letter under different preset operating conditions is received from each antenna element
Number, in by the active phased array on the basis of the second radiofrequency signal of broadband of any channel reception, it is based on pre-defined rule tune
The amplitude and phase of whole the second radiofrequency signal of broadband received by rest channels are added with weight vector, with to the active phased array
In channel carry out reception dynamic calibration.
2. according to the method described in claim 1, it is characterized in that, with the broadband of any channel emission in the active phased array
On the basis of first radiofrequency signal, the amplitude of the first radiofrequency signal of broadband emit by rest channels based on pre-defined rule adjustment with
Phase is added with weight vector, to carry out transmitting dynamic calibration to the channel in the active phased array, further comprises：
Under preset operating conditions, the broadband the first radio frequency letter of all channel emissions in the active phased array is obtained respectively
Number amplitude and phase；
On the basis of in the active phased array by the amplitude and phase of the first radiofrequency signal of broadband of any channel emission, base
In the minimum rule of useful synthesis power maximum interference and the constant rule of range, the broadband that adjustment is emitted by rest channels the
The amplitude and phase of one radiofrequency signal are added with weight vector so that the amplitude error of the first radiofrequency signal of broadband of channel emission and
Keep wave beam constant within a predetermined range after phase deviation adjustment；
Based on after adjustment amplitude and phase be added with weight vector generate respective channel wave beam control code；
The launching beam of respective channel is controlled according to the wave beam control code；
Under all preset operating conditions, it is based on predetermined order, transmitting dynamic is carried out to all channels respectively according to above method
Calibration.
3. according to the method described in claim 2, it is characterized in that, dynamic carrying out transmitting to the channel in the active phased array
When state is calibrated, the on off state and signal sequence in each channel are controlled, so that emitting the broadband the first radio frequency letter each time
Number when be only in emission state there are one channel.
4. according to the method described in claim 1, it is characterized in that, with described in any channel reception in the active phased array
On the basis of the second radiofrequency signal of broadband, the width based on the second radiofrequency signal of broadband that pre-defined rule adjustment is received by rest channels
Degree and phase are added with weight vector, to carry out reception dynamic calibration to the channel in the active phased array, further comprise：
Under preset operating conditions, the broadband the second radio frequency letter of all channel receptions in the active phased array is obtained respectively
Number amplitude and phase；
On the basis of in the active phased array by the amplitude and phase of the second radiofrequency signal of any channel reception, based on having
Broadband the second radio frequency letter received by rest channels with the minimum rule of synthesis power maximum interference and the constant rule of range, adjustment
Number amplitude and phase be added with weight vector so that the amplitude error of the second radiofrequency signal of channel reception and phase deviation adjustment
After keep wave beam constant within a predetermined range；
Based on after adjustment amplitude and phase be added with weight vector generate respective channel wave beam control code；
The reception wave beam of respective channel is controlled according to the wave beam control code；
Under all preset operating conditions, it is based on predetermined order, all channels are carried out respectively according to above method to receive dynamic
Calibration.
5. according to the method described in claim 4, it is characterized in that, dynamic to the channel in the active phased array receive
When state is calibrated, the on off state and signal sequence in each channel are controlled, so that when receiving the second radiofrequency signal of broadband each time
Only reception state is in there are one channel.
6. a kind of secondary radar active phased array system, including：
Aerial array, configured with the mutiple antennas unit being arranged in array, for emitting the first radiofrequency signal of broadband, or reception
The second radiofrequency signal of broadband；
Channel array, configured with the one-to-one channel of each antenna element in the aerial array, for the day
Linear array emits the first radiofrequency signal of broadband, or from second radiofrequency signal of antenna array receiver broadband；
Calibration source is configured to be of coupled connections with each channel in the channel array, after receiving calibration request instruction, uses
It is penetrated in receiving the broadband second by the first radiofrequency signal of broadband and transmitting of each channel emission for the antenna array receiver
Frequency signal；
Signal processing alignment unit is configured to after receiving calibration request instruction, with by appointing in the active phased array
On the basis of the first radiofrequency signal of broadband of one channel emission, broadband first is emitted by rest channels based on pre-defined rule adjustment and is penetrated
The amplitude and phase of frequency signal are added with weight vector, to carry out transmitting dynamic calibration to the channel in the active phased array；
Or in by the active phased array on the basis of the second radiofrequency signal of broadband of any channel reception, it is based on pre-defined rule
The amplitude and phase for adjusting the second radiofrequency signal of broadband received by rest channels are added with weight vector, with to the active phase
Channel in battle array carries out reception dynamic calibration.
7. system according to claim 6, which is characterized in that the calibration source further comprises：
Receiving module is configured to be of coupled connections with each channel in the channel array, passes through each channel emission for receiving
The first radiofrequency signal of broadband and transmitting the second radiofrequency signal of broadband；
Memory module is configured to the amplitude of the second radiofrequency signal of the first radiofrequency signal of stored wide band and broadband and phase, pre-
If working condition, channel initial distribution value, lane testing value；
Standard channel is configured for receiving the first radiofrequency signal of the broadband and transmitting for the antenna array receiver
The second radiofrequency signal of broadband；
Standard antenna is configured to carry out the second emission of radio frequency signals of broadband so that aerial array is received.
8. the system described according to claim 6 or 7, which is characterized in that the signal processing alignment unit further comprises：
Monitoring modular, is configured to monitor the performance affecting parameters in all channels, and is monitoring that performance affecting parameters become
When change, the calibration request instruction is sent out；
Computing module is configured to the amplitude and phase of the first radiofrequency signal of broadband according to each channel emission, or the width received
Amplitude with the second radiofrequency signal and phase, calculate respective channel amplitude error and phase deviation adjustment after keep wave beam constant
In preset range；
Channel calibration module is configured under all preset operating conditions, to pass through any channel in the active phased array
On the basis of the amplitude and phase of the first radiofrequency signal of broadband of transmitting, based on the minimum rule of useful synthesis power maximum interference and model
Constant rule is enclosed, the amplitude and phase for adjusting the first radiofrequency signal of broadband emitted by rest channels are added with weight vector, so that
Beam synthesis it is constant, deviation is within a predetermined range；
Or it on the basis of in the active phased array by the amplitude and phase of the second radiofrequency signal of any channel reception, is based on
The minimum rule of useful synthesis power maximum interference and the constant rule of range, adjust the second radio frequency of broadband received by rest channels
The amplitude complex weighting vector sum phase of signal is added with weight vector, so that Beam synthesis is constant, deviation is within a predetermined range；
Control code forms module, and the amplitude and phase after adjustment of being configured to are added with weight vector generation wave beam control code, root
The launching beam of respective channel or reception wave beam are controlled according to the wave beam control code.
9. system according to claim 8, which is characterized in that further include：
Fault detection unit is configured to according to the first radiofrequency signal of broadband of the transmitting in each channel and by the reception in each channel
The second radiofrequency signal of broadband detection, determine whether each channel breaks down；
Redundant configuration unit is configured to when having detected that channel is broken down, and the system is accessed with generation in redundant channel
For faulty channel.
10. system according to claim 8, which is characterized in that further include：
Control unit is configured to be configured the preset operating conditions of the system and be carried out to the signal sequence in channel
Control；
Power Management Unit, is configured to according to different preset operating conditions, and timing control is carried out to the power supply in each channel
And control system of switching on or off electricity.
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