CN106383341B - One kind going italic target seeker radar signal processor precision calibration method - Google Patents
One kind going italic target seeker radar signal processor precision calibration method Download PDFInfo
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- CN106383341B CN106383341B CN201610695177.7A CN201610695177A CN106383341B CN 106383341 B CN106383341 B CN 106383341B CN 201610695177 A CN201610695177 A CN 201610695177A CN 106383341 B CN106383341 B CN 106383341B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
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- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses one kind to go italic target seeker radar signal processor precision calibration method, steps are as follows: 1, being connected to signal processing signal input interface using simple signal source, it adjusts simple signal source and inputs frequency, guidance header signal processor control instruction adjustment signal processor operating mode is simulated by serial ports of computers, comprising moving-target mode, static target mode, tested the speed, distance measurement function test；2, continuously adjustment simple signal source inputs frequency, is tested the speed, range accuracy Fast Calibration.What the present invention realized based on simple signal source simple and quick removes italic target seeker radar signal processor precision calibration, have and introduces that test equipment error is small, parameter calibration feature with high accuracy, meet system testing requirement, the technology has been applied to ground and goes italic target seeker radar signal processor precision calibration process at present.
Description
Technical field
The present invention relates to one kind to go italic target seeker radar signal processor precision calibration method, belongs to Space Microwave thunder
Up to field of measuring technique.
Background technique
Target seeker radar is the key components of modern precision guided weapon, the guided missile appearance that it is provided according to weapon system
The priori datas such as state, speed effectively detect echo signal, the relative position of extract real-time guided missile and target in corresponding airspace
And relative movement parameters, Autonomy complete it is static to ground, move slowly at and Fast Moving Object, the inspection of sea Small Vessel
It surveys and tracking, output guidance information, smart missiles is hit target.
Target seeker MMW RADAR SIGNAL USING processor for different application scenarios (such as moving-target, static target, to Hai Mo
Formula, to ground mode etc.) there is object ranging, speed measuring function, its main feature is that target scene mode is complicated, measurement parameter is more, this is just
So that target seeker radar signal processor mode branch is more, timing control is complicated.The precision calibration of signal processor will be very
It is cumbersome.Conventional echo simulator method of testing test job is heavy, and development cost increases, and precision measure is vulnerable to echo simulator shadow
It rings.It needs to explore the new method that target seeker radar signal processor quickly tests verifying and precision calibration in a hurry, essence can be reduced
Scale determines workload, and can guarantee the precision of calibration.Removing italic target seeker radar signal processor precision calibration is at signal
The necessary links for managing device Performance figure and systematic error accounting, how simply, efficiently and accurately to signal processor precision calibration
It is most important to target seeker radar.
Published calibration related data is consulted, it is following several to going italic signal processing device precision calibration to have
Mode:
1) signal processor analogue echo standardization.This method is suitable for processor hardware resource and has more than needed more situation,
Testing process is complicated, and echo parameter adjustment is time-consuming not flexible, expends hardware resource, improves development cost, and test is not comprehensive,
Test does not include the test and calibration of ADC sample circuit.
2) dedicated echo simulator test calibration equipment.The adjustment of this method test parameter is flexible, but to dedicated analogue echoes
The required precision of device test calibration equipment analogue echoes is high, improves development cost, simulator has also been introduced during precision calibration
The extra error of itself.
It can be seen that traditional precision calibration method from above several precision calibration methods and need to expend additional hardware money
Source, vast development cost, and calibration process heavy workload introduce additional test equipment error, it is difficult to meet high-precision
The calibration demand of degree.Test and precision calibration method based on simple signal source yet there are no pertinent literature report.
Summary of the invention
It is an object of the invention to overcome the shortage of prior art, proposes one kind and go italic target seeker Radar Signal Processing
Device precision calibration method, method is easy with test signal generation, introducing instrument extra error is small, functional verification is comprehensive, parameter
The features such as stated accuracy is high.
The technology of the present invention solution: one kind going italic target seeker radar signal processor precision calibration method, including
Steps are as follows:
1) italic target seeker radar signal processor speed measuring function is gone to test:
11) simple signal source frequency f is adjustedinFor
Wherein, PRF is pulse recurrence frequency；fIFor the IF frequency of operation of receiver；N is the speed where expectation target
Unit, n=0 indicate static target test, and n ≠ 0 indicates moving-target test；NintFor slow time integral Doppler narrow band filter
The number of filter of group；M be so thatInteger, wherein BIFor receiver if sampling band
It is wide；N value is integer；
12) by simple signal source frequency finMultiple signals are resolved by 1 point of multi-path power divider, and are sent to signal processing
Device；
13) the target velocity v for judging signal processor output, works as velocity errorWhen, determine knot
Fruit is that signal processor speed measuring function is qualified, and jumps to step 3)；WhereinFor the mesh of signal processor output
Mark rate theory result；Work as velocity errorWhen, then signal processor precision calibration is abandoned, determines letter
Number processor speed measuring function is unqualified；
2) italic target seeker radar signal processor distance measurement function is gone to test
21) adjustment simple signal source frequency is fin；
22) by simple signal source frequency finMultiple signals are resolved by 1 point of multi-path power divider, and are sent to signal processing
Device；
23) the target range r for judging signal processor output, works as range errorWhen, determine
As a result qualified for signal processor distance measurement function, and jump to step 3)；WhereinFor letter
The target range notional result of number processor output, wherein KrFor the chirp rate for emitting signal；Adjust n valueWherein k is integer, NrFor the points of distance FFT signal accumulation, fsFor ADC sample rate；C is light
Speed, RrefFor reference distance；Work as velocity errorWhen, then the calibration of signal processor velocity accuracy is abandoned,
Determine that signal processor distance measurement function is unqualified；
3) italic target seeker radar signal processor is gone to test the speed, range accuracy calibration
Adjustment reference distance makes target be in different distance segments, continuous transformation n, so that target actual distance, target
Speed is in non-integral multiple distance unit, at speed unit, records corresponding distance measure ri, velocity measurement vi, calculate letter
Number processor distance delta r, speed σ v precision calibration value are respectively as follows:
Wherein I is testing time.
The invention has the following advantages over the prior art:
The calibration of signal processor precision will have a direct impact on the final measurement error of radar system, improve stated accuracy to height
Precision director radar is of great significance.Therefore, high-precision nominal data is simply and efficiently obtained to believe target seeker radar
The earlier verifying of number processor and precision calibration have broad application prospects.
What is proposed goes italic target seeker radar signal processor precision calibration technology based on simple signal source, can drop
The low difficulty for removing italic target seeker radar signal processor precision calibration reduces workload；It can satisfy distance, tachometric survey
Various modes calibration meet system and quickly test and precision calibration application requirement without generating complicated burst signal.It is suitable
For the verifying and calibration of multi-mode, can promote and apply to going the target detection of italic, the function of tracking radar signal processor
It is able to verify that and demarcates.Its major advantage is embodied in following two aspects:
(1) there is the characteristics of test equipment precision is high, and parameter adjusts fast and flexible using the method in simple signal source, overcomes
Other conventional method test equipments are at high cost, and parameter adjusts cumbersome defect.
(2) said from the angle of precision calibration, have it is easy to operate, introduce the small feature of additional calibrating instrument error, mark
Determine precision height.
Detailed description of the invention
Fig. 1 is that oblique signal processor processes flow diagram is removed involved in the present invention；
Fig. 2 is test equipment connection schematic diagram of the present invention.
Specific embodiment
The working principle of the invention and the course of work are further illustrated with reference to the accompanying drawing:
As shown in Figure 1, italic target seeker signal processor is gone to carry out object ranging and during the process that tests the speed mainly includes
Frequency Analog-digital Converter (ADC), digital quadrature demodulation, clutter recognition, objective accumulation detection and target range, speed parameter output
Multiple modules.Signal processor receives external schema control instruction by serial ports and works in different modes, for example works in not
With apart from stage mode, static target mode, moving target mode etc., every kind of operating mode correspond to the different ADC sampling times,
Objective accumulation detects timing and method, and signal processor parsing serial ports control instruction works in different operating modes, different works
Operation mode corresponds to different signal handlers.During the test, different operating modes needs are demarcated respectively, every time
During precision calibration, operating mode must be fixed.
The scaling method is also only applicable to the calibration for removing italic target seeker signal processor of intermediate frequency Analog-digital Converter,
It is not suitable for the signal processor of base band quadrature Analog-digital Converter.
Signal processor samples echo signal of intermediate frequency, the signal after if sampling first, and processor passes through digital quadrature solution
Tune downconverts to base band, then carries out clutter recognition, and objective accumulation detection carries out correlative accumulation processing to multiple pulses first, and
Carry out Threshold detection, finally, according to where target detection range gate and speed door converse the distance of target, speed, and by
Target measurement parameters output module passes through the measured target range of serial ports output, speed parameter.
During parameter calibration, by adjusting the frequency of simple signal source output, theoretical calculation goes out target range and speed
Spend parameter exact value, with signal processor processes simple signal source output actual range, velocity measurement be compared into
The precision calibration of row distance and velocity measurement.Thus carry out simulated target parameter without echo simulator, it is only necessary to single
Frequency source signal generates test signal, has the advantages that testing signal generation is easy, meanwhile, simple signal source is generally standard
High precision instrument, generating signal has the characteristics that error is small, therefore the test method introduces test equipment error very little, calibration essence
Degree is high.
As shown in Fig. 2, test equipment mainly has simple signal source and a meter with serial communication interface in the present invention
Calculation machine.
The specific steps of the present invention are as follows:
One kind going italic target seeker radar signal processor precision calibration method, mainly includes function qualification determination and essence
Scale determines two parts, specifically includes that steps are as follows:
1) italic target seeker radar signal processor speed measuring function is gone to test:
11) simple signal source frequency f is adjustedinFor
Wherein, PRF is pulse recurrence frequency；fIFor the IF frequency of operation of receiver；N is the speed where expectation target
Unit, n=0 indicate static target test, and n ≠ 0 indicates moving-target test；NintFor slow time integral Doppler narrow band filter
The number of filter of group；M be so thatInteger, wherein BIFor receiver if sampling band
It is wide；N value is integer；
12) by simple signal source frequency finInput signal processor；
13) the target velocity v for judging the output of signal processor serial ports, works as velocity errorWhen, sentence
Determining result is that signal processor speed measuring function is qualified, and jumps to step 3)；WhereinFor signal processor output
Target velocity notional result；Work as velocity errorWhen, then determine that signal processor speed measuring function does not conform to
Lattice abandon the calibration of signal processor velocity accuracy.
(2) italic target seeker radar signal processor distance measurement function is gone to test:
21) adjustment simple signal source frequency is fin,
22) simple signal source output frequency is adjusted to fin, and input signal processor；
23) the target range r for judging signal processor output, works as range errorWhen, determine
As a result qualified for signal processor distance measurement function, and jump to step 3)；WhereinFor letter
The target range notional result of number processor output, wherein KrFor the chirp rate for emitting signal；Adjust n valueWherein k is integer, NrFor the points of distance FFT signal accumulation, fsIt is adopted for ADC (analog-digital converter)
Sample rate；C is the light velocity, RrefFor reference distance；Work as velocity errorWhen, then determine that signal processor is surveyed
It is unqualified away from function, abandon the calibration of signal processor range accuracy.
3) italic target seeker radar signal processor is gone to test the speed, range accuracy calibration:
Adjustment reference distance makes target be in different distance segments, continuous transformation n, so that target actual distance, target
Speed is in non-integral multiple distance unit, at speed unit, records corresponding distance measure ri, velocity measurement vi, calculate letter
Number processor distance delta r, speed σ v precision calibration value are respectively as follows:
Wherein I is testing time.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (1)
1. one kind goes italic target seeker radar signal processor precision calibration method, it is characterised in that comprise the following steps that
1) italic target seeker radar signal processor speed measuring function is gone to test:
11) simple signal source frequency f is adjustedinFor
Wherein, PRF is pulse recurrence frequency；fIFor the IF frequency of operation of receiver；N is the speed unit where expectation target,
N=0 indicates static target test, and n ≠ 0 indicates moving-target test；NintFor the filter of slow time integral Doppler narrow band filter group
Wave device number；M be so thatInteger, wherein BIFor receiver if sampling bandwidth；N takes
Value is integer；
12) by simple signal source frequency finMultiple signals are resolved by 1 point of multi-path power divider, and are sent to signal processor；
13) the target velocity v for judging signal processor output, works as velocity errorWhen, determine that result is
Signal processor speed measuring function is qualified, and jumps to step 3)；WhereinFor the target speed of signal processor output
Topology degree result；Work as velocity errorWhen, then signal processor precision calibration is abandoned, is determined at signal
It is unqualified to manage device speed measuring function；
2) italic target seeker radar signal processor distance measurement function is gone to test
21) adjustment simple signal source frequency is fin；
22) by simple signal source frequency finMultiple signals are resolved by 1 point of multi-path power divider, and are sent to signal processor；
23) the target range r for judging signal processor output, works as range errorWhen, determine that result is
Signal processor distance measurement function is qualified, and jumps to step 3)；WhereinFor signal processing
The target range notional result of device output, wherein KrFor the chirp rate for emitting signal；Adjust n value
Wherein k is integer, NrFor the points of distance FFT signal accumulation, fsFor ADC sample rate；C is the light velocity, RrefFor reference distance；Work as speed
Spend errorWhen, then the calibration of signal processor velocity accuracy is abandoned, determines signal processor ranging function
It can be unqualified；
3) italic target seeker radar signal processor is gone to test the speed, range accuracy calibration
Adjustment reference distance makes target be in different distance segments, continuous transformation n, so that target actual distance, target velocity
At non-integral multiple distance unit, speed unit, corresponding distance measure r is recordedi, velocity measurement vi, calculate at signal
Reason device distance delta r, speed σ v precision calibration value are respectively as follows:
Wherein I is testing time.
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| CN109884597B (en) * | 2019-04-04 | 2021-04-16 | 北京环境特性研究所 | VHF frequency band target characteristic measuring method and device |
| CN116299248B (en) * | 2023-05-22 | 2023-08-08 | 成都远望科技有限责任公司 | Weather radar signal processor calibration system and calibration method |
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| CN104166126A (en) * | 2014-07-21 | 2014-11-26 | 西安空间无线电技术研究所 | Echo signal simulation method used for continuous wave radar |
| CN105353360A (en) * | 2015-11-12 | 2016-02-24 | 西安电子工程研究所 | Radar seeker signal processing simulated analysis method and system |
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| GB2509787B (en) * | 2013-01-15 | 2017-09-13 | Mbda Uk Ltd | A missile seeker and guidance method |
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| CN104166126A (en) * | 2014-07-21 | 2014-11-26 | 西安空间无线电技术研究所 | Echo signal simulation method used for continuous wave radar |
| CN105353360A (en) * | 2015-11-12 | 2016-02-24 | 西安电子工程研究所 | Radar seeker signal processing simulated analysis method and system |
Non-Patent Citations (3)
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| Modelling and simulation of spatial-temporal correlated K distributed clutter for coherent radar seeker;Yong Yang等;《IET Radar, Sonar and Navigation》;20140131;第8卷(第1期);全文 * |
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