CN108333556A - A kind of multichannel direction-finding receiver calibration system and method based on error correction - Google Patents
A kind of multichannel direction-finding receiver calibration system and method based on error correction Download PDFInfo
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- CN108333556A CN108333556A CN201810098761.3A CN201810098761A CN108333556A CN 108333556 A CN108333556 A CN 108333556A CN 201810098761 A CN201810098761 A CN 201810098761A CN 108333556 A CN108333556 A CN 108333556A
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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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/023—Monitoring or calibrating
Abstract
The invention discloses a kind of multichannel direction-finding receiver calibration system and method based on error correction, the system comprises signal processing module, memory module, calibration module, calibration antenna and multiple signal receiving assemblies, signal receiving assembly includes filter, limiter, SP2T switches, frequency conversion channel and ADC module, channel on the basis of the frequency conversion channel of one of signal receiving assembly, the frequency conversion channel of other signal receiving assemblies are to survey phase channel；The signal processing module, generates for the signal to calibration source and the switching of SP2T switches controls, and handles the signal received, obtains the phasing table under different temperatures, and carry out error correction to phasing table before every use.The present invention can generate each phasing table for surveying phase channel place signal receiving assembly under different temperatures, and carry out error correction to phasing table using preceding, be conducive to improve phase alignment precision, ensure the Measure direction performance of receiver.
Description
Technical field
The present invention relates to communication direction finding fields, more particularly to a kind of multichannel direction-finding receiver school based on error correction
Barebone and method.
Background technology
Modern direction detection receiver has working frequency range wide, the high feature of frequency point, from hundreds of MHz to tens GHz,
It is limited by existing analog-to-digital conversion (ADC) device, directly can not be digitized processing, the side of generally use in day line back end
Method is to use superhet, the radiofrequency signal from antenna is downconverted to intermediate frequency, then handled, and reaches phase demodulation mould
The intermediate-freuqncy signal of block portion point have passed through multiple modules such as antenna element, radio-frequency channel, frequency conversion channel, either the antenna of front end and
The microwave devices such as mixing, filtering, amplification in radio-frequency channel, or frequency conversion channel, frequency phase, magnitude-phase characteristics consistency have
Limit, the difference of local oscillator connecting cable length can also cause big phase change；
In Project Realization, inter-channel phase characteristic is not completely the same, this this may result in the direction finding of direction-finding equipment
Therefore energy degradation in multichannel direction-finding receiver, carries out phase alignment, for ensureing the accuracy of operation of receiver
It is most important, in the multichannel direction-finding receiver course of work, influenced by environment, usage time, device aging degree, respectively
The phase error in channel is inconsistent, this is just that the phase alignment of multichannel direction-finding receiver brings very big difficulty.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of, and the multichannel direction finding based on error correction connects
Receipts machine calibration system and method can generate the phasing table of signal receiving assembly where respectively surveying phase channel under different temperatures,
And error correction is being carried out to phasing table using preceding, be conducive to improve phase alignment precision, ensure the direction finding of receiver
Energy.
The purpose of the present invention is achieved through the following technical solutions：A kind of multichannel direction finding based on error correction connects
Receipts machine calibration system, including signal processing module, memory module, calibration module, calibration antenna and multiple signal receiving assemblies, often
The front end of a signal receiving assembly is both provided with corresponding signal receiving antenna；
The signal receiving assembly includes filter, limiter, SP2T switches, frequency conversion channel and ADC module, the filter
Input terminal is connected with corresponding signal receiving antenna, and the output end of filter is defeated by the first signal that limiter and SP2T are switched
Enter end connection, the second signal input terminal of SP2T switches is connect with calibration module, at the control signal and signal of SP2T switches
Module connection is managed, the output end of the SP2T switches passes sequentially through frequency conversion channel and ADC module is connect with signal processing module；Institute
It states signal processing module also to connect with calibration module and memory module respectively, the output end of calibration module also connects with calibration antenna
It connects；
In the multiple signal receiving assembly, channel on the basis of the frequency conversion channel of one of signal receiving assembly, other signals
The frequency conversion channel of receiving unit is to survey phase channel；
The calibration module is transferred to calibration antenna and each for generating calibration signal under the control of signal processing module
A signal receiving assembly；
The signal processing module, generates for the signal to calibration source and the switching of SP2T switches controls, and to receiving
To signal handled, obtain different temperatures under phasing table, preserved in a storage module, and using every time
It is preceding that error correction table is obtained to phasing table progress error correction, it is used for phase alignment.
Wherein, the calibration module includes calibration source and power splitter, and the calibration source connect with signal processing module, is used for
Calibration signal is generated under the control of signal processing module, the output end in calibration source is connect with calibration antenna and power splitter respectively,
The output end of the power splitter is connect with the second signal input terminal of the SP2T switches in each signal receiving assembly respectively.
Wherein, the signal processing module includes：Calibration source control unit generates calibration signal for controlling calibration source；
Switch control unit, for controlling the switching that SP2T is switched in each signal receiving assembly；Interior cycle labeling unit is used for
When SP2T switchings are to second signal input terminal, reference channel under different temperatures and survey phase channel are exported by ADC module
Signal carry out phase demodulation, obtain under different temperatures, each phase error for surveying phase channel, formed in cycle labeling table, storing
It is preserved in module；Unit is demarcated in outer circulation, for when SP2T is switched to the first signal input part, to benchmark in darkroom
Channel and survey phase channel carry out phase demodulation by the signal that ADC module exports, and obtain under Current Temperatures, letter where each survey phase channel
The phase error of number receiving unit forms outer circulation calibration scale, is preserved in a storage module；Temperature compensation unit is used for
Using outer circulation calibration scale, inner loop calibration scale compensates, to obtain under different temperatures, signal where each survey phase channel
The phase error of receiving unit generates the phasing table under different temperatures, is preserved in a storage module；Error correction list
Member, it is logical to frequency conversion to avoid environment, device aging degree for before every use, error correction being carried out to phasing table
The influence that road is brought obtains the error correction table under different temperatures, for being used during direction finding.
The frequency conversion channel includes the amplifying unit of mixing unit, filter unit, the input terminal of the mixing unit with
SP2T switch connections, the output end of mixing unit passes sequentially through filter unit and amplifying unit is connect with ADC module.The signal
Processing module uses FPGA processor；The memory module uses Nand-flash memories.
A kind of phase alignment of the multichannel direction-finding receiver calibration system based on error correction, including with
Lower step：
S1. interior cycle labeling：Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, simultaneously
The SP2T switchings of each signal receiving assembly are controlled to second signal input terminal, at different temperature, signal processing mould
Root tuber according to the signal received calculate the phase error in each survey phase channel, and generates interior cycle labeling table and be stored in storage mould
In block；
S2. outer circulation is demarcated：Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, simultaneously
The SP2T switchings of each signal receiving assembly are controlled to the first signal input part, under dark room conditions, signal processing module
The phase error of signal receiving assembly where calculating each survey phase channel is carried out according to the signal received, and generates outer circulation calibration
Table preserves in a storage module；
S3. temperature-compensating：Signal processing module utilizes outer circulation calibration scale, and inner loop calibration scale compensates, to obtain not
Under synthermal, each phase error for surveying phase channel place signal receiving assembly generates the phasing table under different temperatures, protects
It deposits in a storage module；
S4. error correction：Before direction finding work, signal processing module controls the point frequency modulation in calibration source generation working frequency range again
Pulse signal processed, while the SP2T switchings of each signal receiving assembly are controlled to second signal input terminal, in Current Temperatures
Under, signal processing module calculates the phase error in each survey phase channel again, and calculated phase error is to different temperatures
Under phasing table corrected in real time, obtain real-time correction chart, phase alignment when preserving in a storage module for direction finding
It uses.
Wherein, the step S1 includes following sub-step：
Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, stepping 1MHZ；
Signal processing module controls the SP2T switchings of each signal receiving assembly to second signal input terminal, and calibration source generates
Signal after power splitter, switched by SP2T, respectively enter the frequency conversion channel of each signal receiving assembly, and through ADC
Module transfer is to signal processing module；
At different temperatures, signal processing module is to reference channel and each signal progress surveyed phase channel and exported through ADC module
Phase demodulation, and calculate each phase difference for surveying phase channel and reference channel, i.e., each phase error for surveying phase channel generates interior cycle
Calibration scale preserves in a storage module, in the interior cycle labeling table, including under different temperatures, each phase for surveying phase channel
Error.
The step S2 includes following sub-step：
Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, stepping 1MHZ；
Signal processing module controls the SP2T switchings of each signal receiving assembly to the first signal input part, and calibration source generates
Signal emitted through calibration antenna；
Each signal receiving assembly receives the signal of calibration antenna transmitting by corresponding signal receiving antenna, filtered device and
Limiter is transferred to SP2T switches, and the first input end through SP2T switches carries out the frequency conversion channel of signal receiving assembly, and through ADC
Module transfer is to signal processing module；
Signal processing module calculates and works as to reference channel and each signal progress phase demodulation surveyed phase channel and exported through ADC module
At preceding temperature, the phase difference of signal receiving assembly where reference channel and signal receiving assembly where each survey phase channel, i.e., each survey
The phase error of signal receiving assembly where phase channel, generates outer circulation calibration scale；In the outer circulation calibration scale, including current
At a temperature of, each phase error for surveying phase channel place signal receiving assembly.
The step S3 includes following sub-step：
Signal processing module utilizes the information in interior cycle labeling table and outer circulation calibration scale, and by identical temperature, each is surveyed
The phase error in phase channel and the phase error of signal receiving assembly where the survey phase channel are subtracted each other, and are obtained each and are surveyed phase channel
Corresponding difference, i.e. phase error caused by the corresponding signal receiving antenna in survey phase channel, filter and limiter；
To each survey phase channel, signal processing module is demarcated according to the difference being calculated, at various temperatures inner loop
Information in table compensates, and obtains under different temperatures, and each phase error for surveying phase channel place signal receiving assembly generates
Phasing table under different temperatures preserves in a storage module.
The step S4 includes following sub-step：
Before direction finding work, signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range again,
Stepping 1HZ；
The SP2T switchings of the signal processing module each signal receiving assembly of secondary control again are to second signal input terminal, calibration source
The signal of generation is switched after power splitter by SP2T, and the frequency conversion channel of each signal receiving assembly is respectively enterd, and is passed through
ADC module is transferred to signal processing module；
Signal processing module is counted again to reference channel and each signal progress phase demodulation surveyed phase channel and exported through ADC module
Each phase difference for surveying phase channel and reference channel is calculated, i.e., each real-time phase error for surveying phase channel under Current Temperatures；
Under Current Temperatures, the difference of real-time phase error and phase error in interior cycle labeling table that each surveys phase channel is calculated
Value, and the phasing table under different temperatures is modified using the difference, it obtains real-time correction chart and is stored in memory module
In, it is used for the phase alignment of direction finding process.
The beneficial effects of the invention are as follows：The present invention, which can generate, respectively surveys phase channel place signal receiving assembly under different temperatures
Phasing table, be conducive to improve phase alignment precision, ensure the Measure direction performance of receiver；And before direction finding, to phase
Checking list carries out error correction and is further increased to avoid the influence that environment or device aging degree generate calibration accuracy
The survey phase performance of receiver.
Description of the drawings
Fig. 1 is the system principle diagram of the present invention；
Fig. 2 is flow chart of the method for the present invention.
Specific implementation mode
Technical scheme of the present invention is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
As shown in Figure 1, a kind of multichannel direction-finding receiver calibration system based on error correction, including signal processing mould
Block, memory module, calibration module, calibration antenna and multiple signal receiving assemblies, the front end of each signal receiving assembly are respectively provided with
There is corresponding signal receiving antenna；
The signal receiving assembly includes filter, limiter, SP2T switches, frequency conversion channel and ADC module, the filter
Input terminal is connected with corresponding signal receiving antenna, and the output end of filter is defeated by the first signal that limiter and SP2T are switched
Enter end connection, the second signal input terminal of SP2T switches is connect with calibration module, at the control signal and signal of SP2T switches
Module connection is managed, the output end of the SP2T switches passes sequentially through frequency conversion channel and ADC module is connect with signal processing module；Institute
It states signal processing module also to connect with calibration module and memory module respectively, the output end of calibration module also connects with calibration antenna
It connects；
In the multiple signal receiving assembly, channel on the basis of the frequency conversion channel of one of signal receiving assembly, other signals
The frequency conversion channel of receiving unit is to survey phase channel；
The calibration module is transferred to calibration antenna and each for generating calibration signal under the control of signal processing module
A signal receiving assembly；
The signal processing module, generates for the signal to calibration source and the switching of SP2T switches controls, and to receiving
To signal handled, obtain different temperatures under phasing table, preserved in a storage module, and using every time
It is preceding that error correction table is obtained to phasing table progress error correction, it is used for phase alignment.
Wherein, the calibration module includes calibration source and power splitter, and the calibration source connect with signal processing module, is used for
Calibration signal is generated under the control of signal processing module, the output end in calibration source is connect with calibration antenna and power splitter respectively,
The output end of the power splitter is connect with the second signal input terminal of the SP2T switches in each signal receiving assembly respectively.
Wherein, the signal processing module includes：Calibration source control unit generates calibration signal for controlling calibration source；
Switch control unit, for controlling the switching that SP2T is switched in each signal receiving assembly；Interior cycle labeling unit is used for
When SP2T switchings are to second signal input terminal, reference channel under different temperatures and survey phase channel are exported by ADC module
Signal carry out phase demodulation, obtain under different temperatures, each phase error for surveying phase channel, formed in cycle labeling table, storing
It is preserved in module；Unit is demarcated in outer circulation, for when SP2T is switched to the first signal input part, to benchmark in darkroom
Channel and survey phase channel carry out phase demodulation by the signal that ADC module exports, and obtain under Current Temperatures, letter where each survey phase channel
The phase error of number receiving unit forms outer circulation calibration scale, is preserved in a storage module；Temperature compensation unit is used for
Using outer circulation calibration scale, inner loop calibration scale compensates, to obtain under different temperatures, signal where each survey phase channel
The phase error of receiving unit generates the phasing table under different temperatures, is preserved in a storage module；Error correction list
Member, it is logical to frequency conversion to avoid environment, device aging degree for before every use, error correction being carried out to phasing table
The influence that road is brought obtains the error correction table under different temperatures, for being used during direction finding.
The frequency conversion channel includes the amplifying unit of mixing unit, filter unit, the input terminal of the mixing unit with
SP2T switch connections, the output end of mixing unit passes sequentially through filter unit and amplifying unit is connect with ADC module.The signal
Processing module uses FPGA processor；The memory module uses Nand-flash memories.
As shown in Fig. 2, a kind of phase alignment of multichannel direction-finding receiver calibration system based on error correction
Method includes the following steps：
S1. interior cycle labeling：Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, simultaneously
The SP2T switchings of each signal receiving assembly are controlled to second signal input terminal, at different temperature, signal processing mould
Root tuber according to the signal received calculate the phase error in each survey phase channel, and generates interior cycle labeling table and be stored in storage mould
In block；
S2. outer circulation is demarcated：Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, simultaneously
The SP2T switchings of each signal receiving assembly are controlled to the first signal input part, under dark room conditions, signal processing module
The phase error of signal receiving assembly where calculating each survey phase channel is carried out according to the signal received, and generates outer circulation calibration
Table preserves in a storage module；
S3. temperature-compensating：Signal processing module utilizes outer circulation calibration scale, and inner loop calibration scale compensates, to obtain not
Under synthermal, each phase error for surveying phase channel place signal receiving assembly generates the phasing table under different temperatures, protects
It deposits in a storage module；
S4. error correction：Before direction finding work, signal processing module controls the point frequency modulation in calibration source generation working frequency range again
Pulse signal processed, while the SP2T switchings of each signal receiving assembly are controlled to second signal input terminal, in Current Temperatures
Under, signal processing module calculates the phase error in each survey phase channel again, and calculated phase error is to different temperatures
Under phasing table corrected in real time, obtain real-time correction chart, phase alignment when preserving in a storage module for direction finding
It uses.
Wherein, the step S1 includes following sub-step：
Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, stepping 1MHZ；
Signal processing module controls the SP2T switchings of each signal receiving assembly to second signal input terminal, and calibration source generates
Signal after power splitter, switched by SP2T, respectively enter the frequency conversion channel of each signal receiving assembly, and through ADC
Module transfer is to signal processing module；
At different temperatures, signal processing module is to reference channel and each signal progress surveyed phase channel and exported through ADC module
Phase demodulation, and calculate each phase difference for surveying phase channel and reference channel, i.e., each phase error for surveying phase channel generates interior cycle
Calibration scale preserves in a storage module, in the interior cycle labeling table, including under different temperatures, each phase for surveying phase channel
Error.
The step S2 includes following sub-step：
Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, stepping 1MHZ；
Signal processing module controls the SP2T switchings of each signal receiving assembly to the first signal input part, and calibration source generates
Signal emitted through calibration antenna；
Each signal receiving assembly receives the signal of calibration antenna transmitting by corresponding signal receiving antenna, filtered device and
Limiter is transferred to SP2T switches, and the first input end through SP2T switches carries out the frequency conversion channel of signal receiving assembly, and through ADC
Module transfer is to signal processing module；
Signal processing module calculates and works as to reference channel and each signal progress phase demodulation surveyed phase channel and exported through ADC module
At preceding temperature, the phase difference of signal receiving assembly where reference channel and signal receiving assembly where each survey phase channel, i.e., each survey
The phase error of signal receiving assembly where phase channel, generates outer circulation calibration scale；In the outer circulation calibration scale, including current
At a temperature of, each phase error for surveying phase channel place signal receiving assembly.
The step S3 includes following sub-step：
Signal processing module utilizes the information in interior cycle labeling table and outer circulation calibration scale, and by identical temperature, each is surveyed
The phase error in phase channel and the phase error of signal receiving assembly where the survey phase channel are subtracted each other, and are obtained each and are surveyed phase channel
Corresponding difference, i.e. phase error caused by the corresponding signal receiving antenna in survey phase channel, filter and limiter；
To each survey phase channel, signal processing module is demarcated according to the difference being calculated, at various temperatures inner loop
Information in table compensates, and obtains under different temperatures, and each phase error for surveying phase channel place signal receiving assembly generates
Phasing table under different temperatures preserves in a storage module.
In embodiments herein, it is assumed that the calibration temperature of outer circulation calibration scale is T1, including at a temperature of T1, it is each to survey
The phase error of signal receiving assembly where phase channel；In interior cycle labeling table comprising T1, T2, T3 ... at a temperature of Tn is more, respectively
Survey the phase error in phase channel, then it is mutually synthermal in step S3, that is, refer to temperature T1；It only needs at a temperature of T1, each
The phase error and the phase error of signal receiving assembly where the survey phase channel for surveying phase channel are subtracted each other, and are obtained each survey and are communicated
Difference corresponding to road, i.e. phase error caused by the corresponding signal receiving antenna in survey phase channel, filter and limiter；So
Afterwards in interior cycle labeling table, first in interior cycle labeling table, the phase error in phase channel is respectively surveyed at a temperature of T2, in addition corresponding to
Survey the difference that phase channel is calculated, you can the phase error of signal receiving assembly where respectively surveying phase channel at a temperature of T2 is obtained,
At a temperature of similarly obtaining T3 to Tn, each phase error for surveying phase channel place signal receiving assembly, you can obtain final phase
Checking list, in the phasing table comprising T1, T2, T3 ... at a temperature of Tn, it is each survey phase channel where signal receiving assembly phase
Error.
Due to environment（Illumination, electromagnetic wave）With the influence of device aging degree, each direction finding（Phasing table uses）It
Before, each phase error for surveying phase channel is inconsistent, and each phase error for surveying phase channel place signal receiving assembly also can phase
It should change, therefore need to carry out error correction to phasing table before direction finding work, specifically：
The step S4 includes following sub-step：
Before direction finding work, signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range again,
Stepping 1HZ；
The SP2T switchings of the signal processing module each signal receiving assembly of secondary control again are to second signal input terminal, calibration source
The signal of generation is switched after power splitter by SP2T, and the frequency conversion channel of each signal receiving assembly is respectively enterd, and is passed through
ADC module is transferred to signal processing module；
Signal processing module is counted again to reference channel and each signal progress phase demodulation surveyed phase channel and exported through ADC module
Each phase difference for surveying phase channel and reference channel is calculated, i.e., each real-time phase error for surveying phase channel under Current Temperatures；
Under Current Temperatures, the difference of real-time phase error and phase error in interior cycle labeling table that each surveys phase channel is calculated
Value, and the phasing table under different temperatures is modified using the difference, it obtains real-time correction chart and is stored in memory module
In, it is used for the phase alignment of direction finding process.
In embodiments herein, it is assumed that the temperature of direction finding process is T2, then can obtain T2 temperature by step S4
Under each direction-finding channels of space real-time phase error, contain in interior cycle labeling table T1, T2, T3 ... at a temperature of more of Tn, respectively survey phase
The phase error in channel；Therefore it need to be by Current Temperatures（T2）Under, to each survey phase channel, real-time phase error and interior cycle are marked
The phase error for determining table is subtracted each other, the i.e. corresponding phase error corrections value for surveying phase channel of obtained difference（By environment, time, device
Error caused by degree of aging）, then in phasing table, first at a temperature of T1, by phasing table, each is surveyed
The phase error of signal receiving assembly where phase channel, in addition the error correction values for surveying phase channel are corresponded to, at a temperature of completion T1
Error correction；Then at a temperature of T2, by phasing table, the phase of signal receiving assembly is missed where each surveys phase channel
Difference completes the error correction at a temperature of T2 in addition the corresponding error correction values for surveying phase channel, temperature T3 to Tn similarly, Jin Erke
To realize the error correction at all temperature, obtains real-time correction chart and preserve in a storage module, for the phase school of direction finding process
Standard uses.
To sum up, the present invention can generate the phasing table that phase channel place signal receiving assembly is respectively surveyed under different temperatures,
Be conducive to improve phase alignment precision, ensure the Measure direction performance of receiver；And before direction finding, error is carried out to phasing table
It corrects, to avoid the influence that environment or device aging degree generate calibration accuracy, further improves the survey phase of receiver
Performance.
Claims (10)
1. a kind of multichannel direction-finding receiver calibration system based on error correction, it is characterised in that：Including signal processing module,
Memory module, calibration module, calibration antenna and multiple signal receiving assemblies, the front end of each signal receiving assembly are both provided with pair
The signal receiving antenna answered；
The signal receiving assembly includes filter, limiter, SP2T switches, frequency conversion channel and ADC module, the filter
Input terminal is connected with corresponding signal receiving antenna, and the output end of filter is defeated by the first signal that limiter and SP2T are switched
Enter end connection, the second signal input terminal of SP2T switches is connect with calibration module, at the control signal and signal of SP2T switches
Module connection is managed, the output end of the SP2T switches passes sequentially through frequency conversion channel and ADC module is connect with signal processing module；Institute
It states signal processing module also to connect with calibration module and memory module respectively, the output end of calibration module also connects with calibration antenna
It connects；
In the multiple signal receiving assembly, channel on the basis of the frequency conversion channel of one of signal receiving assembly, other signals
The frequency conversion channel of receiving unit is to survey phase channel；
The calibration module is transferred to calibration antenna and each for generating calibration signal under the control of signal processing module
A signal receiving assembly；
The signal processing module, generates for the signal to calibration source and the switching of SP2T switches controls, and to receiving
To signal handled, obtain different temperatures under phasing table, preserved in a storage module, and using every time
It is preceding that error correction table is obtained to phasing table progress error correction, it is used for phase alignment.
2. a kind of multichannel direction-finding receiver calibration system based on error correction according to claim 1, feature exist
In：The calibration module includes calibration source and power splitter, and the calibration source is connect with signal processing module, in signal processing
Calibration signal is generated under the control of module, the output end in calibration source is connect with calibration antenna and power splitter respectively, the power splitter
Output end respectively in each signal receiving assembly SP2T switch second signal input terminal connect.
3. a kind of multichannel direction-finding receiver calibration system based on error correction according to claim 1, feature exist
In：The signal processing module includes：
Calibration source control unit generates calibration signal for controlling calibration source；
Switch control unit, for controlling the switching that SP2T is switched in each signal receiving assembly；
Interior cycle labeling unit is used for when SP2T switchings are to second signal input terminal, to reference channel under different temperatures
Phase demodulation is carried out by the signal that ADC module exports with phase channel is surveyed, is obtained under different temperatures, each phase for surveying phase channel is missed
Difference forms interior cycle labeling table, is preserved in a storage module；
Unit is demarcated in outer circulation, and for when SP2T is switched to the first signal input part, to reference channel and phase is surveyed in darkroom
Channel carries out phase demodulation by the signal that ADC module exports, and obtains under Current Temperatures, signal receiving assembly where each survey phase channel
Phase error, formed outer circulation calibration scale, preserved in a storage module；
Temperature compensation unit, for utilizing outer circulation calibration scale, inner loop calibration scale compensates, to obtain different temperatures
Under, each phase error for surveying phase channel place signal receiving assembly generates the phasing table under different temperatures, in storage mould
It is preserved in block；
Error correction unit, it is old to avoid environment, device for before every use, error correction being carried out to phasing table
The influence that change degree brings frequency conversion channel obtains the error correction table under different temperatures, for being used during direction finding.
4. a kind of multichannel direction-finding receiver calibration system based on error correction according to claim 1, feature exist
In：The frequency conversion channel includes the amplifying unit of mixing unit, filter unit, and input terminal and the SP2T of the mixing unit are switched
Connection, the output end of mixing unit passes sequentially through filter unit and amplifying unit is connect with ADC module.
5. a kind of multichannel direction-finding receiver calibration system based on error correction according to claim 1, feature exist
In：The signal processing module uses FPGA processor；The memory module uses Nand-flash memories.
6. a kind of multichannel direction-finding receiver calibration system based on error correction according to any one of claim 1 ~ 5
The phase alignment of system, it is characterised in that：Include the following steps：
S1. interior cycle labeling：Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, simultaneously
The SP2T switchings of each signal receiving assembly are controlled to second signal input terminal, at different temperature, signal processing mould
Root tuber according to the signal received calculate the phase error in each survey phase channel, and generates interior cycle labeling table and be stored in storage mould
In block；
S2. outer circulation is demarcated：Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, simultaneously
The SP2T switchings of each signal receiving assembly are controlled to the first signal input part, under dark room conditions, signal processing module
The phase error of signal receiving assembly where calculating each survey phase channel is carried out according to the signal received, and generates outer circulation calibration
Table preserves in a storage module；
S3. temperature-compensating：Signal processing module utilizes outer circulation calibration scale, and inner loop calibration scale compensates, to obtain not
Under synthermal, each phase error for surveying phase channel place signal receiving assembly generates the phasing table under different temperatures, protects
It deposits in a storage module；
S4. error correction：Before direction finding work, signal processing module controls the point frequency modulation in calibration source generation working frequency range again
Pulse signal processed, while the SP2T switchings of each signal receiving assembly are controlled to second signal input terminal, in Current Temperatures
Under, signal processing module calculates the phase error in each survey phase channel again, and calculated phase error is to different temperatures
Under phasing table corrected in real time, obtain real-time correction chart, phase alignment when preserving in a storage module for direction finding
It uses.
7. a kind of phase alignment of multichannel direction-finding receiver calibration system based on error correction according to claim 6
Method, it is characterised in that：The step S1 includes following sub-step：
Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, stepping 1MHZ；
Signal processing module controls the SP2T switchings of each signal receiving assembly to second signal input terminal, and calibration source generates
Signal after power splitter, switched by SP2T, respectively enter the frequency conversion channel of each signal receiving assembly, and through ADC
Module transfer is to signal processing module；
At different temperatures, signal processing module is to reference channel and each signal progress surveyed phase channel and exported through ADC module
Phase demodulation, and calculate each phase difference for surveying phase channel and reference channel, i.e., each phase error for surveying phase channel generates interior cycle
Calibration scale preserves in a storage module, in the interior cycle labeling table, including under different temperatures, each phase for surveying phase channel
Error.
8. a kind of phase alignment of multichannel direction-finding receiver calibration system based on error correction according to claim 6
Method, it is characterised in that：The step S2 includes following sub-step：
Signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range, stepping 1MHZ；
Signal processing module controls the SP2T switchings of each signal receiving assembly to the first signal input part, and calibration source generates
Signal emitted through calibration antenna；
Each signal receiving assembly receives the signal of calibration antenna transmitting by corresponding signal receiving antenna, filtered device and
Limiter is transferred to SP2T switches, and the first input end through SP2T switches carries out the frequency conversion channel of signal receiving assembly, and through ADC
Module transfer is to signal processing module；
Signal processing module calculates and works as to reference channel and each signal progress phase demodulation surveyed phase channel and exported through ADC module
At preceding temperature, the phase difference of signal receiving assembly where reference channel and signal receiving assembly where each survey phase channel, i.e., each survey
The phase error of signal receiving assembly where phase channel, generates outer circulation calibration scale；In the outer circulation calibration scale, including current
At a temperature of, each phase error for surveying phase channel place signal receiving assembly.
9. a kind of phase alignment of multichannel direction-finding receiver calibration system based on error correction according to claim 6
Method, it is characterised in that：The step S3 includes following sub-step：
Signal processing module utilizes the information in interior cycle labeling table and outer circulation calibration scale, and by identical temperature, each is surveyed
The phase error in phase channel and the phase error of signal receiving assembly where the survey phase channel are subtracted each other, and are obtained each and are surveyed phase channel
Corresponding difference, i.e. phase error caused by the corresponding signal receiving antenna in survey phase channel, filter and limiter；
To each survey phase channel, signal processing module is demarcated according to the difference being calculated, at various temperatures inner loop
Information in table compensates, and obtains under different temperatures, and each phase error for surveying phase channel place signal receiving assembly generates
Phasing table under different temperatures preserves in a storage module.
10. a kind of phase school of multichannel direction-finding receiver calibration system based on error correction according to claim 6
Quasi- method, it is characterised in that：The step S4 includes following sub-step：
Before direction finding work, signal processing module controls the point frequency modulated pulse signal in calibration source generation working frequency range again,
Stepping 1HZ；
The SP2T switchings of the signal processing module each signal receiving assembly of secondary control again are to second signal input terminal, calibration source
The signal of generation is switched after power splitter by SP2T, and the frequency conversion channel of each signal receiving assembly is respectively enterd, and is passed through
ADC module is transferred to signal processing module；
Signal processing module is counted again to reference channel and each signal progress phase demodulation surveyed phase channel and exported through ADC module
Each phase difference for surveying phase channel and reference channel is calculated, i.e., each real-time phase error for surveying phase channel under Current Temperatures；
Under Current Temperatures, the difference of real-time phase error and phase error in interior cycle labeling table that each surveys phase channel is calculated
Value, and the phasing table under different temperatures is modified using the difference, it obtains real-time correction chart and is stored in memory module
In, it is used for the phase alignment of direction finding process.
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