CN109375182A - Radar receiver amplitude-phase consistency corrects system - Google Patents
Radar receiver amplitude-phase consistency corrects system Download PDFInfo
- Publication number
- CN109375182A CN109375182A CN201811279306.XA CN201811279306A CN109375182A CN 109375182 A CN109375182 A CN 109375182A CN 201811279306 A CN201811279306 A CN 201811279306A CN 109375182 A CN109375182 A CN 109375182A
- Authority
- CN
- China
- Prior art keywords
- signal
- module
- digital
- receiving channel
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
A kind of radar receiver amplitude-phase consistency disclosed by the invention corrects system, it is desirable to provide one kind does not need far-field radiation source, and amplitude and phase correction confidence level is higher, and the smaller correction system of error.The technical scheme is that: when radar is in correction mode, the correction signal of generation is sent to simulation receiving channel subsystem by signal routing subsystem, down coversion is carried out to correction signal, analog intermediate frequency signal is converted into digital intermediate frequency signal；Digital Signal Processing subsystem is respectively the digital intermediate frequency signal of every road radar receiver receiving channel, generate numerically-controlled oscillator NCO all the way, the sinusoidal signal of NCO output is multiplied with digital intermediate frequency signal respectively with cosine signal, obtain in-phase component and quadrature component, then next group of frequency values, the phase value of NCO are set, it repeats the above process, until the phase change a cycle of NCO, completes the amplitude-phase consistency correction of receiving channel.
Description
Technical field
The invention belongs to radar signal processing fields, and in particular to radar receiver amplitude-phase consistency corrects system.
Background technique
Modern radar system detects target to obtain good performance in strong clutter environment, will usually receive
Rf echo signal is down-converted to intermediate frequency, then is decomposed into baseband signal through quadrature demodulator.But it is asymmetric, each due to circuit
The not perfect and radar operating frequency of device selected by branch and the variation of environment temperature cause the magnitude-phase characteristics in each channel different
It causes, to increase systematic measurement error.Secondly, after radar works long hours, due to the electronics such as receiver low-noise amplifier member
Device aging or failure and other reasons also result in receiver gain and change, and further deteriorate the amplitude difference between receiving channel
It is different, lead to the receiving channel characteristic deviation theory design value of radar, reduce the performance of radar system, is such as lifted minor level, drop
Low main lobe gain etc..In addition, there is various errors for the various parts of composition radar, various there are errors to often lead to radar
Receiving channel characteristic deviation theory design value, so that the performance of radar system declines, as minor level lifting, beam position are inclined
From, main lobe gain decline etc..
In common application scenarios, radar system receiver as shown in Figure 3 is by multichannel front end receiver channel, Duo Gemo
Number converter (ADC), digital signal processing unit and supervisory controller composition.Radar system obtains all receiving channels
Signal carry out numeric field weighting processing, to obtain the echo information of specific dimensional orientation.System performance depends on all receptions
The electrical property consistency in channel.But receiving channel is made of various active electronic devices and passive device, especially preceding termination
Channel is received, the signal of processing is analog radio-frequency signal, and device performance is easy the fluctuation with temperature and fluctuates, or with work
The accumulation of time, device performance are degenerated, so as to cause generated between different receiving channels inconsistent amplitude completely and
Phase difference, the overall performance of severe exacerbation radar system.And the active device electrical characteristics in receiving channel change over time and
It runs down, is the change that the most important amplitude phase error source of radar system and the present invention need to measure and carry out rectification building-out
Amount；Therefore it needs to carry out amplitude-phase consistency correction to receiving channel, keeps the electrical property of receiving channel consistent.
The correction accuracy of radar receiver receiving channel affects the signal processing performance of array, and correction is to guarantee received wave
The important link of beam forming properties.Therefore in the use process of radar, the width phase of user's regular check receiving channel is needed
Consistency, and safeguarded in time when finding the problem.In order to guarantee that the performance of radar can reach design requirement, it is also necessary to right
The amplitude and phase of the receiving channel of radar do accurate measurement and correction.
The correction of radar receiving channel generallys use factory correction and far field corrects two kinds.Factory correction is usually dark in microwave
It is realized in room using near field measurement.Due to the complexity of radar system, it is dispersed with many active electronic devices.Radar system
Error further includes battle array other than these fixed errors such as the asymmetry of mechanical structure, device manufacturing tolerance, module location tolerance
Face out-of-flatness, temperature deformation, component failures equal error.Fixed mistake can only be generally eliminated in the factory correction that microwave dark room carries out
Difference.But after radar system is mounted on field of employment, the variation with environment and the passage using the time, active electronic device
The performance of part can gradually change, and so as to cause between different receiving channels, there are amplitude and phase differences, deteriorate radar usability
Energy.
After gadget to scene, in order to improve the service performance of radar, it usually needs carry out far field correction.Far field
Alignment technique is usually located on the aircraft in far field using the radiator being placed on outside radar.Radiator is used to complete thunder
Amplitude-phase consistency up to receiving channel corrects.Correction signal is emitted by radiator at this time, radar is switched to correction mode, and will connect
The signal that prestores that the correction signal and factory test received obtains is compared, and corrects correction constant later, makes its correction knot
Fruit corrects result as close as initial factory.In outfield timing, although measuring distance may be met the requirements, other
Condition limits the feasibility of outfield amplitude and phase correction: 1 external field environment signal is complicated, and various signal reflex superpositions interfere with each other phenomenon
Seriously, correction accuracy is influenced；The shaking of precision and external field environment (such as wind, rain etc.) to antenna array when 2 antenna rotating platforms rotate
It influences.However, either factory correction or live far field correction, requires very expensive external calibration equipment, including special
The microwave dark room of door design, the aircraft for aiming at far field correction repacking, far field correction radiation source etc..And to these equipment itself
Precision propose very high requirement, substantially increase the cost of radar machine system.
Summary of the invention
The present invention proposes that one kind does not need far-field radiation to solve the disadvantage that factory correction and far field correction system exist
Source, phasing confidence level is higher, and error is smaller, and structure is simple, the small radar receiver width phase of additional hardware burden
Concordance system.
Above-mentioned purpose of the invention can be achieved by following technical proposals: a kind of radar receiver amplitude-phase consistency
Correction system, comprising: signal routing subsystem, simulation receiving channel subsystem, analog-to-digital conversion subsystem and Digital Signal Processing
Subsystem, it is characterised in that: when radar is in correction mode, the correction signal of generation is sent to mould by signal routing subsystem
Quasi- receiving channel subsystem carries out down coversion to correction signal, obtains the analog intermediate frequency signal for being amplified and being filtered, pass through
Analog intermediate frequency signal is converted into digital intermediate frequency signal by analog-to-digital conversion subsystem, and sends Digital Signal Processing subsystem to；Number
Word signal processing subsystem is respectively every road radar receiver receiving channel digital intermediate frequency signal, generates digital control oscillation all the way
The sinusoidal signal of device NCO, NCO output is multiplied with digital intermediate frequency signal respectively with cosine signal, obtains in-phase component and orthogonal point
Then amount sets next group of frequency values, the phase value of NCO, repeats the above process, until the phase change a cycle of NCO, and
The in-phase component and quadrature component of all input Digital Signal Processing subsystems obtain every road receiving channel in computing module
Amplitude difference and phase difference；Computing module obtains calculated result maximum value as corresponding receiving channel and receives relative to reference
The amplitude difference in channel connects using the corresponding NCO phase value of calculated result maximum value as corresponding receiving channel relative to reference
The phase difference for receiving channel completes the amplitude-phase consistency correction of receiving channel.
Beneficial effects of the present invention are mainly manifested in:
1) it does not need to increase additional far field calibration source, in this embodiment it is not even necessary to factory correction.The present invention is using simulation receiving channel
System carries out down coversion to the analog signal that low noise amplification module exports, and obtains the intermediate-freuqncy signal amplified and be filtered.
The analog intermediate frequency signal that simulation receiving channel subsystem exports is converted into digital signal by analog-to-digital conversion subsystem, sends number to
Signal processing subsystem, Digital Signal Processing subsystem are respectively that every road radar receiver receiving channel generation is digital control all the way
Oscillator NCO signal.By the frequency and phase of Digital Signal Processing subsystem controls NCO, the width phase between receiving channel is completed
Nonuniformity correction, entire correction course does not need to increase additional far field calibration source, or even dispatches from the factory what correction nor is it necessary that.
2) phasing confidence level is higher, and error is smaller.The present invention is used comprising top control module and computing module
Digital Signal Processing subsystem, top control module pass through meter in different sub-systems and intermodule transmitting configuration parameter and control instruction
It calculates module and obtains amplitude difference of the calculated result maximum value as corresponding receiving channel relative to reference receiving channel, will calculate
As a result phase difference of the corresponding NCO phase value of maximum value as corresponding receiving channel relative to reference receiving channel, completes to connect
The sensor gain and phase uncertainties correction for receiving channel, is not required to counting statistics angular deviation, it is only necessary to believe by the powerful number of radar system
Number processing capacity and necessary a little hardware circuit, can complete radar system receiver amplitude and phase correction, and obtained phase
It is higher to correct confidence level, and error is smaller.
3) structure is simple, and additional hardware burden is small.The present invention is using signal routing subsystem, simulation receiving channel subsystem
System, analog-to-digital conversion subsystem and digital signal processing subsystem composition radar receiver amplitude-phase consistency correct system, system knot
Structure is simple, and additional hardware burden is small, small to test site requirement, and complicated calculating is held by the digital signal processing chip of rear end
Row, Project Realization are easy.The radar system of various scales is adapted to, road transceiver channels even up to ten thousand also can be very in short-term
Interior completion correction, can carry out for Narrow-band Radar system, can also carry out for wideband radar system.
Detailed description of the invention
Fig. 1 is radar receiver amplitude-phase consistency correction system schematic of the present invention.
Fig. 2 is the detailed maps of the correction principle of Fig. 1 radar receiving channel.
Fig. 3 is the typical architecture schematic diagram of prior art radar system receiver.
Invention will be further explained below with reference to the drawings and examples..
Specific embodiment
Refering to fig. 1.In the embodiment described below, a kind of radar receiver amplitude-phase consistency corrects system, comprising: letter
Number routing subsystem, simulation receiving channel subsystem, analog-to-digital conversion subsystem and digital signal processing subsystem, wherein signal
Routing subsystem includes Anneta module and switch module；Simulating receiving channel subsystem includes corresponding to suitable in each receiving channel
Secondary concatenated low noise amplification module, analog down module and IF signal processing module；Digital Signal Processing subsystem packet
Containing Digital Down Converter Module, FIR filter module, computing module, correction signal generation module, NCO generation module and master control mould
Block.The correction signal that switch module feeds back variable connector signal and correction signal generation module be sent into low noise amplification module into
Row amplification and filtering processing, processing result are sent into analog down module and carry out down coversion, then will through IF signal processing module
Down-conversion signal is sent into analog-to-digital conversion subsystem, and intermediate-freuqncy signal analog signal is converted into digital intermediate frequency signal, is then fed into number
Digital Down Converter Module in word signal processing subsystem carries out Digital Down Convert；Meanwhile in Digital Signal Processing subsystem
The sinusoidal signal of generation is sent into Digital Down Converter Module and carries out Digital Down Convert by NCO generation module, through FIR after Digital Down Convert
Computing module is sent into filter module filtering, and the amplitude difference and phase difference of every road receiving channel are calculated by computing module
Value.Top control module controls the frequency and phase of the sinusoidal signal that NCO generation module generates and cosine signal.
When radar is in correction mode, the correction signal of generation is sent to simulation receiving channel by signal routing subsystem
Subsystem carries out down coversion to correction signal, obtains the analog intermediate frequency signal for being amplified and being filtered, and passes through analog-to-digital conversion
Analog intermediate frequency signal is converted into digital intermediate frequency signal by system, and sends Digital Signal Processing subsystem to；Digital Signal Processing
Subsystem is respectively that numerically-controlled oscillator NCO, NCO are defeated all the way for every road radar receiver receiving channel digital intermediate frequency signal generation
Sinusoidal signal out is multiplied with digital intermediate frequency signal respectively with cosine signal, obtains in-phase component and quadrature component, then sets
Next group of frequency values, the phase value of NCO, repeats the above process, until the phase change a cycle of NCO, and all input numbers
The in-phase component and quadrature component of word signal processing subsystem obtained in computing module every road receiving channel amplitude difference and
Phase difference obtains calculated result maximum value as corresponding receiving channel relative to reference receiving channel by computing module
Amplitude difference, using the corresponding NCO phase value of calculated result maximum value as corresponding receiving channel relative to reference receiving channel
Phase difference, complete receiving channel amplitude-phase consistency correction.
Refering to Fig. 2.Radar receiver amplitude-phase consistency correction system is broadly divided into analog domain and numeric field, signal routing
System, simulation receiving channel subsystem and analog-to-digital conversion subsystem are covered in analog domain；Digital Signal Processing subsystem includes
In the digital domain.In signal routing subsystem, Anneta module includes antenna 1, antenna 2 ... the day connected in each receiving channel
Line n；Switch module includes corresponding to the switch for connecting antenna and low-noise amplifier LNA in each receiving channel, and switch 2 ... is opened
N is closed, for example is connected on connection switch 1 in receiving channel 1, connection switch 2 in receiving channel 2.Simulate receiving channel subsystem master
To include connection switch module, low-noise amplifier LNA, analog down converter LO of the sequential series in each receiving channel and
IF signal processing module, for example it is connected on connection low-noise amplifier LNA1 in receiving channel 1, it is connected in receiving channel 2
Low-noise amplifier LNA2 is connected in receiving channel 1, be connected on low-noise amplifier LNA1 and IF signal processing module it
Between analog down converter LO1, be connected in receiving channel 2, be connected on low-noise amplifier LNA2 and IF signal processing mould
Analog down converter LO2 between block.Wherein, the low-noise amplifier LNA in each receiving channel is to radar system receiver
The weak radio-frequency signal of receiving end carries out low noise amplification, the simulation that analog down converter LO exports low-noise amplifier LNA
Signal carry out down coversion, the intermediate-freuqncy signal simulated, IF signal processing module to intermediate-freuqncy signal amplify and filtering at
Reason.Analog-to-digital conversion subsystem includes the analog-digital converter ADC of series connection IF signal processing module in each receiving channel, and modulus turns
The analog signal of continuous variable from IF signal processing module is converted to discrete digital signal by parallel operation ADC.
Digital Signal Processing subsystem includes: to correspond to each receiving channel connection modulus of analog domain in digital domain circuits to turn
Parallel operation ADC output end is connected in parallel on two Digital Down Converter Modules of analog-digital converter ADC output end, is connected in parallel under two numbers
Numerically-controlled oscillator NCO between frequency-variable module, the FIR number filter being connected between Digital Down Converter Module and computing module
Wave module and top control module, wherein the connected computing module of numerically-controlled oscillator NCO and top control module pass through top control module
The frequency and phase controlling of the sinusoidal signal and cosine signals that generated to NCO generation module.Turn in each receiving channel with modulus
Two Digital Down Converter Modules of parallel operation ADC output end parallel connection, the intermediate-freuqncy signal and number that analog-to-digital conversion module ADC is inputted
The sinusoidal signal sine and cosine signal cosine progress down coversion that oscillator NCO is generated are controlled, and passes through FIR digital filtering mould
Block filters away the high-frequency signal in Digital Down Converter Module output signal, and the direct current signal retained after filtering is sent into and calculates mould
Block.Top control module sets next group of frequency values, the phase value of numerically-controlled oscillator NCO according to the calculated result of computing module,
It repeats the above process, until the phase change a cycle of NCO.Computing module obtains calculated result maximum value and connects as corresponding
Amplitude difference of the channel relative to reference receiving channel is received, using the corresponding NCO phase value of calculated result maximum value as corresponding
Phase difference of the receiving channel relative to reference receiving channel completes the amplitude-phase consistency correction of receiving channel.
Embodiment
When due to temperature or device aging, leading to amplitude and phase occur between radar receiver two-way receiving channel
It is inconsistent, the first amplitude gain A is remembered respectively1, the second amplitude gain A2, first phase offset Φ1, second phase deviate Φ2.The
One amplitude gain A1, first phase deviate Φ1Represent low noise amplification module, the analog down module, intermediate frequency in first passage
The amplitude gain and phase offset that signal processing module, analog-to-digital conversion module generate the signal of input switch 1；Second amplitude increases
Beneficial A2, second phase deviate Φ2Represent low noise amplification module, the analog down module, IF signal processing in second channel
The amplitude gain and phase offset that module, analog-to-digital conversion module generate the signal of input switch 2.Receiving channel 2 is relative to connecing
The range error for receiving channel 1 is the second amplitude gain A2With the first amplitude gain A1Ratio A2/A1, phase error is the second phase
Position offset Φ2Φ is deviated with first phase1Difference Φ2-Φ1.The purpose of the present embodiment is exactly to find out A2/A1、Φ2-Φ1。
Remember the signal that correction signal generation module generates are as follows:
cos(wRF·t) (1)
Wherein, wRFFor the frequency of correction signal.
After the low noise amplification of receiving channel 1 and receiving channel 2, analog down and intermediate frequency filtering, first is reached
Signal before the analog-to-digital conversion module in channel, the analog-to-digital conversion module of first passage are as follows:
Wherein, wRFFor the frequency for the correction signal that correction signal generation module generates, wLOTo input first passage analog down
The local oscillation signal frequency of module, second channel analog down module, t are continuous times.
The intermediate-freuqncy signal of first passage and second channel inputs in corresponding channel after analog-to-digital conversion module ADC sampling
Two Digital Down Converter Modules in parallel, wherein input the first Digital Down Converter Module down coversion digital signal be
Input the down coversion digital signal of the second Digital Down Converter Module are as follows:
Top control module can control first passage NCO generation module, the generation of second channel NCO generation module and formula (4), (5)
The NCO signal of same frequency.
By taking first passage NCO generation module as an example, the NCO signal that it is generated can be indicated are as follows:
With
Wherein, the Digital Down Converter Module of (formula 6) sine sin signal input first passage, (formula 7) cosine cos signal are defeated
Enter Digital Down Converter Module, ΦNCO1It is the initial phase for the NCO signal that first passage NCO generation module generates, when n is discrete
Between.
The down coversion result of first passage Digital Down Converter Module output can be written as:
The down coversion result of the Digital Down Converter Module output of first passage can be written as:
The effect of first passage FIR digital filtering module, second channel FIR digital filtering module is filtered under first passage number
The alternating component in digital down converted signal (formula (8), (9)) that frequency-variable module, second channel Digital Down Converter Module export,
Retain flip-flop, the in-phase component of first passage FIR digital filtering module output are as follows:
The quadrature component of first passage FIR digital filtering module output are as follows:
Similarly, second channel FIR digital filtering module exports
The quadrature component of second channel FIR digital filtering module output are as follows:
Computing module according to formula (14) carries out that α is calculated21
In formula, A2/A1For the second amplitude gain A2With the first amplitude gain A1Ratio, top control module keep receiving channel 1 it is right
The phase Φ for the NCO generation module answeredNCO1It is constant, it is continuously increased the phase Φ of the corresponding NCO generation module of receiving channel 2NCO2。
When meeting formula ΦNCO2-ΦNCO1=Φ2-Φ1Condition when, the α of formula (14)21Reach maximum value, is A2/A1, corresponding number
Phase difference (the Φ of word control oscillator NCO2 and numerically-controlled oscillator NCO1NCO2-ΦNCO1) it is that receiving channel 2 and reception are logical
Phase difference (the Φ in road 12-Φ1)。
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (10)
1. a kind of radar receiver amplitude-phase consistency corrects system, comprising: signal routing subsystem, simulation receiving channel subsystem
System, analog-to-digital conversion subsystem and digital signal processing subsystem, it is characterised in that: when radar is in correction mode, signal road
By subsystem by the correction signal of generation be sent to simulation receiving channel subsystem, to correction signal carry out down coversion, obtain through
Analog intermediate frequency signal is converted into intermediate frequency digital letter by analog-to-digital conversion subsystem by the analog intermediate frequency signal of amplification and filtering processing
Number, and send Digital Signal Processing subsystem to；Digital Signal Processing subsystem is respectively every road radar receiver receiving channel
Digital intermediate frequency signal, generates numerically-controlled oscillator NCO all the way, and the sinusoidal signal and cosine signal of NCO output are respectively and intermediate frequency
Digital signal is multiplied, and obtains in-phase component and quadrature component, then sets next group of frequency values, the phase value of NCO, repeats above-mentioned
Process, until the phase change a cycle of NCO, and the in-phase component of all input Digital Signal Processing subsystems and orthogonal point
Amount obtains the amplitude difference and phase difference of every road receiving channel in computing module；Computing module obtains calculated result maximum value
Amplitude difference as corresponding receiving channel relative to reference receiving channel, by the corresponding NCO phase of calculated result maximum value
It is worth the phase difference as corresponding receiving channel relative to reference receiving channel, completes the amplitude-phase consistency correction of receiving channel.
2. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: signal routing subsystem
Include Anneta module and switch module；Simulate receiving channel subsystem include correspond to it is in sequential series low in each receiving channel
Noise amplification module, analog down module and IF signal processing module；Digital Signal Processing subsystem, which includes that number is lower, to be become
Frequency module, FIR filter module, computing module, correction signal generation module, NCO generation module and top control module.
3. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: switch module is by multichannel
The correction signal of switching signal and correction signal generation module feedback is sent into low noise amplification module and amplifies and be filtered,
Processing result is sent into analog down module and carries out down coversion, then down-conversion signal is sent into modulus through IF signal processing module
Intermediate-freuqncy signal analog signal is converted into digital intermediate frequency signal, is then fed into Digital Signal Processing subsystem by conversion subsystem
Digital Down Converter Module；Meanwhile the NCO generation module in Digital Signal Processing subsystem is by the sinusoidal signal and cosine of generation
Signal is sent into Digital Down Converter Module；The output signal of Digital Down Converter Module filters through FIR filter module and is sent into computing module,
The amplitude difference and phase difference value of every road receiving channel are calculated by computing module；Top control module controls NCO generation module
The sinusoidal signal of generation and the frequency of cosine signal and phase.
4. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: radar receiver width phase
Concordance system is divided into analog domain and numeric field, signal routing subsystem, simulation receiving channel subsystem and analog-to-digital conversion
Subsystem is covered in analog domain；Digital Signal Processing subsystem includes in the digital domain.
5. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: simulation receiving channel
System includes connection switch module, low-noise amplifier LNA, analog down converter LO of the sequential series in each receiving channel
And IF signal processing module, the low-noise amplifier LNA in each receiving channel is to the micro- of radar system receiver receiving end
Weak radiofrequency signal carries out low noise amplification, and analog down converter LO carries out down the low-noise amplifier LNA analog signal exported
Frequency conversion, the intermediate-freuqncy signal simulated, IF signal processing module are amplified and are filtered to intermediate-freuqncy signal.
6. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: analog-to-digital conversion subsystem
Analog-digital converter ADC including IF signal processing module of connecting in each receiving channel；Analog-digital converter ADC will come from intermediate frequency
The analog signal of the continuous variable of signal processing module is converted to discrete digital signal.
7. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: Digital Signal Processing
System includes: to correspond to each receiving channel connection analog-digital converter ADC output end of analog domain in digital domain circuits, is connected in parallel on mould
Two Digital Down Converter Modules of number converter ADC output end are connected in parallel on digital control between two Digital Down Converter Modules
Oscillator NCO, FIR digital filtering module and the top control module being connected between Digital Down Converter Module and computing module,
In, top control module controls the frequency and phase of numerically-controlled oscillator NCO output signal.
8. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: in each receiving channel
Two Digital Down Converter Modules in parallel with analog-digital converter ADC output end believe the intermediate frequency of analog-to-digital conversion module ADC input
Number and numerically-controlled oscillator NCO generate sinusoidal signal sine and cosine signal cosine carry out down coversion, and pass through FIR number
Word filter module filters away the high-frequency signal in Digital Down Converter Module output signal, and the direct current signal retained after filtering is sent into
Computing module calculates the amplitude difference and phase difference value of every road receiving channel；Top control module is according to the calculating of computing module
As a result next group of frequency values, phase value for setting numerically-controlled oscillator NCO, repeat the above process, until the phase change of NCO
A cycle；Computing module obtains amplitude of the calculated result maximum value as corresponding receiving channel relative to reference receiving channel
Difference, the phase using the corresponding NCO phase value of calculated result maximum value as corresponding receiving channel relative to reference receiving channel
Potential difference completes the amplitude-phase consistency correction of receiving channel.
9. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: receiving channel 2 is opposite
In receiving channel 1 range error be the second amplitude gain A2With the first amplitude gain A1Ratio A2/A1, phase error
Two phase deviates Φ2Φ is deviated with first phase1Difference Φ2-Φ1；Low noise by receiving channel 1 and receiving channel 2 is put
Greatly, after analog down and intermediate frequency filtering, reach the analog-to-digital conversion module of first passage, first passage analog-to-digital conversion module it
Preceding intermediate-freuqncy signal are as follows:
(2)
(3)
The intermediate-freuqncy signal of first passage and second channel inputs two in corresponding channel after analog-to-digital conversion module ADC sampling
The Digital Down Converter Module of a parallel connection, wherein
The down coversion digital signal for inputting the first Digital Down Converter Module is
Input the down coversion digital signal of the second Digital Down Converter Module are as follows:
Top control module can control first passage NCO generation module, the generation of second channel NCO generation module and formula (4), (5)
The NCO signal of same frequency；
In formula, wRFFor the frequency for the correction signal that correction signal generation module generates, wLOTo input first passage analog down
The local oscillation signal frequency of module, second channel analog down module, t are continuous times, and n is discrete time.
10. radar receiver amplitude-phase consistency as described in claim 1 corrects system, it is characterised in that: top control module is kept
The phase Φ of the corresponding NCO generation module of receiving channel 1NCO1It is constant, it is continuously increased the corresponding NCO generation module of receiving channel 2
Phase ΦNCO2.When meeting formula ΦNCO2-ΦNCO1=Φ2-Φ1Condition when, the α of formula (14)21Reach maximum value, is A2/
A1, the phase difference (Φ of corresponding numerically-controlled oscillator NCO2 and numerically-controlled oscillator NCO1NCO2-ΦNCO1) it is to receive to lead to
Phase difference (the Φ in road 2 and receiving channel 12-Φ1)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279306.XA CN109375182A (en) | 2018-10-30 | 2018-10-30 | Radar receiver amplitude-phase consistency corrects system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279306.XA CN109375182A (en) | 2018-10-30 | 2018-10-30 | Radar receiver amplitude-phase consistency corrects system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109375182A true CN109375182A (en) | 2019-02-22 |
Family
ID=65390602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811279306.XA Pending CN109375182A (en) | 2018-10-30 | 2018-10-30 | Radar receiver amplitude-phase consistency corrects system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109375182A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109981190A (en) * | 2019-04-02 | 2019-07-05 | 浙江大学 | A kind of test of on-chip noise and self-repairing system |
| CN110031809A (en) * | 2019-04-15 | 2019-07-19 | 北京电子工程总体研究所 | A kind of more receiving channel amplitude-phase consistency Calibration Methods of radar and readable storage medium storing program for executing |
| CN110031811A (en) * | 2019-05-13 | 2019-07-19 | 成都天奥技术发展有限公司 | The quickly calibrated system of multi-channel wide band signal coherent characteristic |
| CN110209625A (en) * | 2019-04-11 | 2019-09-06 | 浙江大学 | A kind of on piece synchronization self-repairing system based on low frequency reference signal |
| CN110531325A (en) * | 2019-07-30 | 2019-12-03 | 中国人民解放军91550部队 | Digital if receiver and method for monopulse radar |
| CN110554366A (en) * | 2019-09-02 | 2019-12-10 | 北京电子工程总体研究所 | Method and device for automatically calibrating amplitude-phase consistency of seeker |
| CN110703234A (en) * | 2019-10-29 | 2020-01-17 | 杭州瑞利海洋装备有限公司 | Three-dimensional camera sonar array signal receiver amplitude-phase correction device and method |
| CN111638494A (en) * | 2020-05-31 | 2020-09-08 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Multi-channel amplitude and phase correction method for digital beam synthesis system |
| CN111983580A (en) * | 2020-08-25 | 2020-11-24 | 中国科学院空天信息创新研究院 | Radar signal frequency dispersion processing method |
| CN112255469A (en) * | 2020-08-31 | 2021-01-22 | 西安空间无线电技术研究所 | Antenna arbitrary curved surface near field test phase acquisition device and method without reference signal |
| CN112763983A (en) * | 2020-12-25 | 2021-05-07 | 四川九洲空管科技有限责任公司 | Pairing device for secondary radar channel signals |
| US20210311164A1 (en) * | 2020-04-07 | 2021-10-07 | Infineon Technologies Ag | Radar system with balancing of the receiving channels over a plurality of radar chips |
| CN114217140A (en) * | 2021-09-28 | 2022-03-22 | 北京理工大学 | Digital correlation processing method and device for radiometer signal processor |
| CN114966582A (en) * | 2022-07-29 | 2022-08-30 | 成都市克莱微波科技有限公司 | Microwave transceiving assembly self-checking method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804656A (en) * | 2006-01-20 | 2006-07-19 | 武汉大学 | Method for calibrating high-frequency radar antenna array channel by using ionosphere echo |
| CN203858360U (en) * | 2014-04-22 | 2014-10-01 | 南京大桥机器有限公司 | Radar signal amplitude and phase consistency calibration system |
| CN108614247A (en) * | 2018-04-03 | 2018-10-02 | 四川九洲电器集团有限责任公司 | A kind of secondary radar channel calibration method |
-
2018
- 2018-10-30 CN CN201811279306.XA patent/CN109375182A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804656A (en) * | 2006-01-20 | 2006-07-19 | 武汉大学 | Method for calibrating high-frequency radar antenna array channel by using ionosphere echo |
| CN203858360U (en) * | 2014-04-22 | 2014-10-01 | 南京大桥机器有限公司 | Radar signal amplitude and phase consistency calibration system |
| CN108614247A (en) * | 2018-04-03 | 2018-10-02 | 四川九洲电器集团有限责任公司 | A kind of secondary radar channel calibration method |
Non-Patent Citations (1)
| Title |
|---|
| LIJIE YANG ET AL.: "Calibration of a Digital Phased Array by Using NCO Phase Increasing Algorithm", 《IEICE TRANSACTIONS ON COMMUNICATIONS》 * |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109981190B (en) * | 2019-04-02 | 2020-04-24 | 浙江大学 | On-chip noise testing and self-repairing system |
| CN109981190A (en) * | 2019-04-02 | 2019-07-05 | 浙江大学 | A kind of test of on-chip noise and self-repairing system |
| CN110209625B (en) * | 2019-04-11 | 2020-08-11 | 浙江大学 | On-chip synchronous self-repairing system based on low-frequency reference signal |
| CN110209625A (en) * | 2019-04-11 | 2019-09-06 | 浙江大学 | A kind of on piece synchronization self-repairing system based on low frequency reference signal |
| US11705908B2 (en) | 2019-04-11 | 2023-07-18 | Zhejiang University | On-chip synchronous self-repairing system based on low-frequency reference signal |
| WO2020207443A1 (en) * | 2019-04-11 | 2020-10-15 | 浙江大学 | Low-frequency reference signal-based synchronous self-repairing system on chip |
| CN110031809A (en) * | 2019-04-15 | 2019-07-19 | 北京电子工程总体研究所 | A kind of more receiving channel amplitude-phase consistency Calibration Methods of radar and readable storage medium storing program for executing |
| CN110031809B (en) * | 2019-04-15 | 2021-07-23 | 北京电子工程总体研究所 | Radar multi-receiving-channel amplitude-phase consistency calibration method and readable storage medium |
| CN110031811A (en) * | 2019-05-13 | 2019-07-19 | 成都天奥技术发展有限公司 | The quickly calibrated system of multi-channel wide band signal coherent characteristic |
| CN110531325A (en) * | 2019-07-30 | 2019-12-03 | 中国人民解放军91550部队 | Digital if receiver and method for monopulse radar |
| CN110554366A (en) * | 2019-09-02 | 2019-12-10 | 北京电子工程总体研究所 | Method and device for automatically calibrating amplitude-phase consistency of seeker |
| CN110703234A (en) * | 2019-10-29 | 2020-01-17 | 杭州瑞利海洋装备有限公司 | Three-dimensional camera sonar array signal receiver amplitude-phase correction device and method |
| CN110703234B (en) * | 2019-10-29 | 2021-07-02 | 杭州瑞利海洋装备有限公司 | Three-dimensional camera sonar array signal receiver amplitude-phase correction device and method |
| US20210311164A1 (en) * | 2020-04-07 | 2021-10-07 | Infineon Technologies Ag | Radar system with balancing of the receiving channels over a plurality of radar chips |
| CN111638494A (en) * | 2020-05-31 | 2020-09-08 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Multi-channel amplitude and phase correction method for digital beam synthesis system |
| CN111983580A (en) * | 2020-08-25 | 2020-11-24 | 中国科学院空天信息创新研究院 | Radar signal frequency dispersion processing method |
| CN111983580B (en) * | 2020-08-25 | 2023-07-21 | 中国科学院空天信息创新研究院 | Radar signal frequency dispersion processing method |
| CN112255469A (en) * | 2020-08-31 | 2021-01-22 | 西安空间无线电技术研究所 | Antenna arbitrary curved surface near field test phase acquisition device and method without reference signal |
| CN112255469B (en) * | 2020-08-31 | 2023-12-12 | 西安空间无线电技术研究所 | Antenna arbitrary curved surface near field test phase acquisition device and method without reference signal |
| CN112763983B (en) * | 2020-12-25 | 2022-04-26 | 四川九洲空管科技有限责任公司 | Pairing device for secondary radar channel signals |
| CN112763983A (en) * | 2020-12-25 | 2021-05-07 | 四川九洲空管科技有限责任公司 | Pairing device for secondary radar channel signals |
| CN114217140A (en) * | 2021-09-28 | 2022-03-22 | 北京理工大学 | Digital correlation processing method and device for radiometer signal processor |
| CN114966582A (en) * | 2022-07-29 | 2022-08-30 | 成都市克莱微波科技有限公司 | Microwave transceiving assembly self-checking method and system |
| CN114966582B (en) * | 2022-07-29 | 2022-11-11 | 成都市克莱微波科技有限公司 | Microwave transceiving assembly self-checking method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109375182A (en) | Radar receiver amplitude-phase consistency corrects system | |
| US10608756B2 (en) | Power detector calibration in integrated circuits | |
| CN108333556B (en) | Multichannel direction finding receiver calibration system and method based on error correction | |
| CN100373812C (en) | Calibrating apparatus and method for automatic gain control circuit of array receiver | |
| RU56653U1 (en) | RADAR STATION | |
| CN101222236A (en) | Frequency response correction for a receiver having a frequency translation device | |
| US8792843B2 (en) | Multi-channel RX/TX calibration and local oscillator mismatch mitigation | |
| CN107919881B (en) | A kind of automatic growth control receiver | |
| CN110824466A (en) | Multi-target tracking system and DBF channel calibration FPGA implementation method thereof | |
| US8730097B1 (en) | Distributed phased array testing device | |
| CN111505591A (en) | Phased array sum and difference channel error correction system based on response mechanism | |
| CN115603835A (en) | Phased array radar antenna online calibration method and system | |
| CN100576830C (en) | The method and the corrective system of compensating DC offset, gain skew and phase deviation | |
| Vinci et al. | Wide-range, dual six-port based direction-of-arrival detector | |
| CN104320204A (en) | Local oscillator IQ signal phase and amplitude calibration device | |
| US9093959B2 (en) | Integrated signal analyzer for adaptive control of mixed-signal integrated circuits | |
| CN112051532A (en) | Intermediate frequency calibration method based on vector network analyzer | |
| TWI627840B (en) | Array antenna detection correction method | |
| CN204272094U (en) | The I/Q electrical mismatch detection circuit of low intermediate frequency receiver | |
| KR102334597B1 (en) | Impedance monitoring apparatus and operating method thereof | |
| CN112285662B (en) | SAR load antenna radiation characteristic test method | |
| CN113156199B (en) | Radio frequency power measuring device and method | |
| CN115267664B (en) | Plane radio frequency simulation array calibration equipment and method | |
| US20240121148A1 (en) | Rf communication device and operating method | |
| US20230261773A1 (en) | Method and Apparatus for Inter-Path Delay Estimation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190222 |
|
| WD01 | Invention patent application deemed withdrawn after publication |