CN105093184B - A kind of method and device for improving search radar Monopulse estimation precision - Google Patents

A kind of method and device for improving search radar Monopulse estimation precision Download PDF

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CN105093184B
CN105093184B CN201510500906.4A CN201510500906A CN105093184B CN 105093184 B CN105093184 B CN 105093184B CN 201510500906 A CN201510500906 A CN 201510500906A CN 105093184 B CN105093184 B CN 105093184B
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angle error
data
difference
parameter
angle
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CN105093184A (en
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邹敏
刘卫平
刘文佳
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Shanghai Aerospace Electronic Communication Equipment Research Institute
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Shanghai Aerospace Measurement Control Communication Institute
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Engineering construction two parts are corrected the invention provides a kind of method for improving search radar Monopulse estimation precision, including angle error pretreatment and angle error.Angle error pretreatment is analyzed to search radar monopulse antenna Pattern measurement data, when parameter is different, according to signal difference and ratio, angle error data is calculated using the method for data fitting and interpolation, forms angle error tables of data;Angle error corrects engineering construction and angle error tables of data burning is tried to achieve into difference in memory, then and is compared, and is tabled look-up by difference and when relevant parameter, obtains angle error value, realizes the real time correction to measuring target angle error.The method effectively increases the angle measurement accuracy of traditional single pulse angle measurement side, angle measurement accuracy when especially target deviation antenna beam center is larger.This method is applied to the relatively low search radar of Monopulse estimation radar, especially data transfer rate;The angle error data of correction both can be orientation, or pitching.

Description

A kind of method and device for improving search radar Monopulse estimation precision
Technical field
It is more particularly to a kind of to improve search radar Monopulse estimation precision the present invention relates to search radar field of signal processing Method and device.
Background technology
In modern war, search radar is responsible for important mission in armament systems:In some missile weapon systems In, search radar provides Target indication for tracking radar, when tracking radar fails, then requires the Target indication number of search radar According to can directly command Fire Unit operation;In some missile weapon systems, the target designation data of search radar can be used directly To guide MISSILE LAUNCHING, or even realize guidance function.No matter which kind of situation, all to the certainty of measurement of search radar, especially survey Angular accuracy proposes requirement very high.
Monopulse estimation system can obtain preferable angle measurement accuracy, as the angle-measuring method that modern radar is generally used. Especially search radar, changes into orientation, pitching pair via the pitching Monopulse estimation of early stage, orientation end points technique of estimation angle measurement Axle Monopulse estimation.
It is generally believed that during using Monopulse estimation method, difference and than and angle error direct proportionality, also foundation during angle measurement The proportionate relationship calculates angle error.In fact, the proportional relationship is only more accurate when target is close to beam center, and work as mesh When mark deviates beam center, then strict proportional relation is no longer kept.Tracking radar makes target by constantly adjustment beam position Beam center is directed at as far as possible, can obtain good angle measurement accuracy;And multi-direction, the multiple batches of mesh of search radar requirement observation Mark, data transfer rate is relatively low, and, target general misalignment beam center short to the same target observations time causes angle measurement accuracy to deteriorate, especially When it is larger target deviation beam center, angle measurement accuracy deteriorates more serious.
Therefore, it is necessary to propose a kind of method for improving search radar Monopulse estimation precision, do not increase in Project Realization Plus the workload of antenna measurement, and can simply and easily implement, while angle measurement accuracy of the search radar to target is improved, especially Angle measurement accuracy when target deviation beam center is larger, is conducive to the treatment of follow-up Track In Track.
The content of the invention
It is an object of the invention to provide a kind of method and device for improving search radar Monopulse estimation precision, to solve Existing search radar Monopulse estimation precision is easy to deteriorate, particularly when target deviation beam center is larger, angle measurement accuracy Deteriorate more serious problem.
To achieve the above object, the invention provides a kind of method for improving search radar Monopulse estimation precision, including Angle error is pre-processed and two parts of angle error correction engineering construction;
Wherein, angle error pretreatment is comprised the following steps:
S1:It is determined that the parameters of influence angle error;
S2:For the parameter with actual measurement antenna direction data, the method being fitted using data is asked after carrying out data processing Take with difference and than corresponding actual measurement angle error data;
S3:For the parameter without actual measurement antenna direction data, carried out using the data with actual measurement antenna direction interior Slotting treatment is obtained with difference and than corresponding virtual angle error data;
S4:The actual measurement angle error data and virtual angle error data are merged into generation angle error tables of data;
The angle error correction engineering construction includes:The angle error tables of data is stored in memory, is believed by radar Number processing module exports receiver and channel signal, difference channel signal are normalized in the hope of going on business and comparing, and by difference and are compared And the angle error tables of data that the parameter value of the influence angle error correction be given with radar scheduling is inquired about in the memory, obtain angle Error amount measures the angle error of target with real time correction.
It is preferred that in the step S1, influenceing the parameters of angle error includes working frequency, antenna beam sensing, day Line beam angle.
It is preferred that the angle error tables of data include reference address and angle error data, wherein, address include the difference and The coding of the coding of ratio and the parameter value, the angle error data include actual measurement angle error data and the virtual angle error number According to address corresponds with angle error data.
It is preferred that the determination method of the value specification of the parameters includes parameter coding method, specially by parameter Value is encoded, and using the coding of parameter as the reference address of the angle error tables of data a part;
The value specification of the difference and ratio includes the span and difference and minimum quantization two parts of ratio of difference and ratio, described The span of difference and ratio is to differ from and than the maximum magnitude of monotone variation in actual measurement antenna direction data, the minimum of the difference and ratio Be quantified as difference and than the half of computational accuracy, and will difference and ratio coding as the another of the reference address of the angle error tables of data A part;
The value specification of the angle error includes the span of angle error and minimum quantization two parts of angle error, described The span of angle error be survey in antenna direction data with difference and the corresponding angle error scope of maximum magnitude of ratio, it is described The minimum quantization of angle error is to be determined according to the quantized value of radar angular;
Wherein, the parameters, difference and when the value specification of angle error with the angle error tables of data should The value specification of three kinds of data is mutually unified.
It is preferred that when the step S2 carries out data processing using the method that data are fitted, to any one group of parameter correspondence Data processing, specifically include:
S21:Reject the abnormal data in the directional diagram corresponding to actual measurement antenna direction data;
S22:The angular centre with wave beam and difference beam is asked for, and the angle error value at angular centre is set to 0;
S23:Difference near beam center and more interval than monotonic increase is determined, to determine effective error scope;
S24:Carry out curve fitting treatment to the directional diagram in effective error scope;
S25:Angle-data in effective error scope with difference beam directional diagram as running parameter, the Fitting Calculation respective corners Under degree and beam power, obtains difference and compares, and obtains angle error-difference and compares curve.
It is preferred that to any parameter, asking for being specifically included with difference and than the process of corresponding actual measurement angle error data:According to The method being fitted using data carries out the angle error-difference after data processing and than curve, and conversion is differed from and ratio-angle error is bent Line, and difference and ratio-angle error curve are carried out curve fitting;To the difference for quantifying and than data value one by one, and the Fitting Calculation is poor With than corresponding angle error, then be defined to the angle error closest to meter outside predetermined angle error span by such as angle error The angle error result of calculation and meet the data of angle error span, the difference and ratio-angle error under the Parameter Conditions are obtained with this Data.
It is preferred that the step 3 is specially:To any one group of parameter x without actual measurement antenna direction data,
S31:Two groups of parameters x1, x2 for there are actual measurement antenna direction data near this group of parameter x are chosen, makes the ginseng of parameter x Numerical value is between the parameter value of parameter x1, x2;
S32:The difference and ratio of extracting parameter x1, x2-angle error corresponding relation data;
S33:Angle error value according to data are extracted carries out linear interpolation, corresponding with ratio-angle error with the difference for obtaining parameter x Relation data.
It is preferred that the step 4 is specially:The void that the actual measurement angle error data and step S3 that combining step S2 is obtained are obtained Intend angle error data, the difference and ratio-angle error data of all numerical value of the parameter for influenceing angle error correction are obtained, according to memory In address distribution method, Angle Error data are resequenced, and generate angle error tables of data;Wherein, angle error number is generated Angle Error data carry out quantification treatment during according to table, and the minimum quantization of quantification treatment is to be determined according to the quantized value of radar angular 's.
It is preferred that the angle error tables of data inquired about in the memory is specially:Address distribution side in memory Method, by parameter and difference and than carrying out coded treatment generation reference address, reads angle error tables of data, and then obtain according to reference address The angle error value corresponding with the reference address of generation in angle error tables of data.
It is single present invention also offers a kind of device for improving search radar Monopulse estimation precision, including angle error pretreatment Unit and angle error correction engineering construction unit, wherein, the angle error pretreatment unit includes:Determine parameter module, antenna side To figure measured data processing module, virtual data generation module and generation angle error tables of data module, the determination parameter module Parameter for determining influence angle error, the antenna radiation pattern measured data processing module is used to be directed to actual measurement antenna direction The parameter of diagram data, difference is asked for and than corresponding actual measurement angle error data using data fitting method;At the virtual data generation Managing module is used for for the parameter without actual measurement antenna direction diagram data, and carrying out interpolation treatment using measured data obtains virtual angle mistake Difference data;The generation angle error data table handing module is used to enter rearrangement to actual measurement angle error data and virtual angle error data And quantification treatment, form angle error tables of data;
Angle error correction engineering construction unit include Radar Signal Processing module, radar scheduler module, address formed module, Memory, admission processing module, the Radar Signal Processing module are used for from receiver and channel signal and difference passage Signal is differed from and ratio poor with normalized, and the address forms module and is used to receive difference and when be dispatched from radar The parameter of module carries out geocoding and obtains reference address, the memory be used to storing the angle error tables of data and according to The reference address searches corresponding angle error data, and the admission processing module is used for acceptance angle error information and from radar The parameter of scheduler module is corrected treatment with the measurement angle value after being corrected.
Compared with prior art, beneficial effects of the present invention are as follows:
1st, a kind of method and device for improving search radar Monopulse estimation precision of the invention, can improve search radar pair The angle measurement accuracy of target, angle measurement accuracy when especially target deviation beam center is larger.
2nd, a kind of method for improving search radar Monopulse estimation precision of the invention is corrected by angle error and pre-processed, right Antenna radiation pattern measured data carries out twice fitting treatment, eliminates the influence of noise Angle Error in antenna measurement, misses angle Difference correction is more accurate.
3rd, a kind of method for improving search radar Monopulse estimation precision of the invention is corrected by angle error and pre-processed, In the case of partial parameters are without antenna radiation pattern measured data, virtual data is generated by interpolating method, solved in this case Angle error Correction Problemss, reduce the workload of antenna measurement, and can obtain preferable certainty of measurement.
4th, a kind of method for improving search radar Monopulse estimation precision of the invention corrects engineering construction by angle error, Using look-up table, the real time correction of angle error can be realized in signal transacting processing procedure, method is simple and easy to apply, is related to hardware to set Standby amount is few, and reliability is high.
5th, a kind of method for improving search radar Monopulse estimation precision of the invention, with broad applicability, generally fits For the relatively low search radar of Monopulse estimation radar, especially data transfer rate;The angle error data of correction both can the side of being Position, or pitching, make its range of application more extensive.
Brief description of the drawings
Fig. 1 is the apparatus structure block diagram of raising search radar Monopulse estimation precision of the invention;
Fig. 2 is the method implementation process block diagram of raising search radar Monopulse estimation precision of the invention;
Fig. 3 is the processing procedure block diagram of determination parameter in the angle error pretreatment of the inventive method;
Fig. 4 A are the procedural block diagram of antenna radiation pattern measured data treatment in the angle error pretreatment of the inventive method;
Fig. 4 B be preferred embodiment of the present invention rejecting abnormalities data after obtain figure and/difference initial data;
Data in the effective angle error range that Fig. 4 C are obtained for preferred embodiment of the present invention step S24;
Fig. 4 D are the S curve (difference and ratio-angle error curve) that preferred embodiment of the present invention step S26 is obtained;
Fig. 5 is the processing procedure block diagram of virtual data generation in the angle error pretreatment of the inventive method;
Fig. 6 is the processing procedure block diagram of generation angle error tables of data in the angle error pretreatment of the inventive method.
Specific embodiment
Referring to the accompanying drawing for showing the embodiment of the present invention, the present invention hereafter will be described in greater detail.However, the present invention can be with Multi-form, specification etc. are realized, and be should not be construed as and limited by the embodiment for herein proposing.Conversely, proposing that these are implemented Example is, in order to reach fully and complete disclosure, and more relevant those skilled in the art is understood model of the invention completely Enclose.It is clearly visible in these accompanying drawings, relative size may have been zoomed in or out.
As shown in figure 1, the device of the raising search radar Monopulse estimation precision that the present embodiment is provided, including angle error is pre- Processing unit 100 and angle error correction engineering construction unit 200.Specifically, angle error pretreatment unit 100 includes:It is determined that ginseng Digital-to-analogue block 101, antenna radiation pattern measured data processing module 102, virtual data generation module 103 and generation angle error tables of data Module 104, wherein it is determined that parameter module 101 is used to determine the parameter of influence angle error, antenna radiation pattern measured data treatment mould Block 102 is used for for the parameter for having actual measurement antenna direction diagram data, and difference is asked for and than corresponding actual measurement using data fitting method Angle error data;Virtual data generation processing module 103 is used for for the parameter without actual measurement antenna direction diagram data, using actual measurement Data carry out interpolation treatment and obtain virtual angle error data;Generation angle error data table handing module 104 is used to miss actual measurement angle Difference data and virtual angle error data enter rearrangement and quantification treatment, form angle error tables of data.
Angle error correction engineering construction unit 200 includes Radar Signal Processing module 201, radar scheduler module 202, address Module 203, memory 204, admission processing module 205 are formed, wherein, Radar Signal Processing module 201 is used for from reception Machine and channel signal differed from and ratio poor with normalized with difference channel signal, radar scheduler module 202 is for carrying For the running parameter of radar, address forms module 203 to be carried out for receiving difference and the parameter when from radar scheduler module 202 Geocoding obtains reference address, and memory 204 is used to store the angle error tables of data and be looked into according to the reference address Looking for corresponding angle error data, admission processing module 205 is used for acceptance angle error information and the parameter from radar scheduler module Treatment is corrected with the measurement angle value after being corrected.
Correspondingly, as shown in Fig. 2 the method for the raising search radar Monopulse estimation precision in the present embodiment, including angle Error is pre-processed and two parts of angle error correction engineering construction.Wherein, angle error pretreatment includes:Determine parameter, antenna side Processed to figure measured data, virtual data is generated and the generation several process steps of angle error tables of data;Angle error corrects engineering reality Apply by angle error tables of data burning in memory, realized to measurement target angle error by tabling look-up in Radar Signal Processing Real time correction.
Specifically, angle error pretreatment is comprised the following steps:
S1:Determine parameter, that is, determine the parameter of influence angle error.Parameters and difference and ratio, angle error are also determined simultaneously Value specification.
In the present embodiment, certain search radar system is orientation mechanical scanning, pitching phasescan, orientation, pitching twin shaft list Pulse angle measurement, and pitching beam angle is variable.Specifically, as shown in Figure 3, it is first determined the ginseng of the correction data of influence angle error Number;Secondly, the span of each parameter is determined;Again;It is determined that the value specification of difference and ratio;Finally determine the value rule of angle error Model.
Influenceing the parameter of the correction data of angle error includes:(namely antenna beam refers to for working frequency, pitching beam scanning angle To) and pitching beam angle, it is of course also possible to influence the parameter of angle error correction when being worked including other search radars.
Determine that the span of each parameter is specially:Working frequency, the value of two parameters of pitching beam angle are using volume Code method, each code one parameter value of correspondence.Wherein, working frequency is 6 codings, and span is 0~63, each coding correspondence One frequency, the frequency number and beam angle species number of span covering radar work;Pitching beam scanning angle is using quantization Method, pitching beam scanning angle is encoded to 7, and span is -63~+63, represent -90 °~90 ° of angle, i.e. value model Enclose covering antenna array maximum scan angle.
It is determined that the value specification of difference and ratio is specially:Difference and ratio are set to 10 codings, and span is -512~+512. Analyze the radar actual measurement antenna radiation pattern and, difference beam main lobe, difference and ratio respectively less than 2, it may be determined that differ from and ratio value- Between 2~+2, difference and be about 1% than precision that Radar Signal Processing is calculated determine that minimum quantization is 1/256.
Determine that the value specification of angle error is specially:The coding of angle error value is set to 8, and span is -128~+ 127, in the present embodiment, the span of angle error is determined by beam angle antenna radiation pattern most wide, the radar pitching wave beam Most it is wide can broadening to 7 °, it may be determined that angle error span is -5.625 °~+5.625 °, minimum quantization and radar system parameters It is consistent, takes 360 °/8192.
S2:To the treatment of antenna radiation pattern measured data, for for the parameter value for having actual measurement antenna direction diagram data, using Data fitting method is asked for difference and than corresponding angle error data.
In specific implementation process, as shown in Figure 4 A, the treatment is carried out for all antenna radiation pattern measured datas.Specifically Including:
Step S21, rejects the abnormal data in actual measurement antenna radiation pattern, obtain Fig. 4 B examples and/difference initial data;
Step S22, asked for according to the data and, the angular centre of difference beam, be -18.5 ° in Fig. 4 examples, by the center Angle error be set to 0;
Step S23, it is later determined that effective angle error range, is taken as -3 °~+3 ° in Fig. 4 examples;
Step S24, then the treatment that carried out curve fitting in effective angle error range and beam direction diagram data, obtain figure Data in the effective angle error range of 4C examples;
Step S25, the angle-data in effective error scope with difference beam directional diagram as running parameter, the Fitting Calculation phase Under angle and beam power is answered, difference is obtained and is compared, obtained angle error-difference and compare curve;Specially:Due to antenna radiation pattern In test, measurement and wave beam are inconsistent with the sampling angle of difference beam power, and the two should be united, and difference beam is used in example The angle-data of directional diagram is unified, again the Fitting Calculation and beam power, difference and ratio under same angle is obtained, to effective Data in the range of angle error can obtain angle error-difference and compare relation after all calculating;
Step S26, then be difference and ratio-angle error curve by angle error-difference and than relation transformation, and carry out second curve Fitting, obtains the S curve (difference and ratio-angle error curve) of Fig. 4 D examples;
Step S27, by the difference for quantifying and than the Fitting Calculation angle error again, to the difference that quantifies and than data value one by one, And the Fitting Calculation difference and than corresponding angle error, such as angle error outside predetermined angle error span, then by the angle error limit It is set to the angle error result closest to calculating and meets the data of angle error span, the difference under the Parameter Conditions is obtained with this With than-angle error data.
Method the present embodiment of above-mentioned curve matching is preferably polynomial fitting method, and those skilled in the art are in specific implementation When can take other curve-fitting methods according to being actually needed, the present invention is not limited the method for curve matching.It should be noted that During this step S2 Selecting All Parameters, the parameter with antenna method figure measured data that needs cycle detection all, will each there is day The parameter of line method figure measured data is carried out such as the treatment of step S2, to obtain the corresponding difference of this group of parameter and ratio-angle error number According to.
S3:Virtual data is generated, for for the parameter value without actual measurement antenna direction diagram data, being carried out using measured data Interpolation treatment obtains angle error data.In specific implementation process, as shown in figure 5, the treatment is directed to whether there is antenna radiation pattern The parameter of measured data is carried out.First, two groups of parameters near this group of parameter, having antenna radiation pattern measured data are chosen, is made This group of parameter value is between the two groups of parameter values chosen, referring to step S31, by taking the pitching beam scanning angle of Fig. 5 examples as an example, If parameter value is 22 °, there is no corresponding antenna radiation pattern measured data, at this moment should just look for pitching beam scanning angle than 22 ° Small maximum and the minimum value bigger than 22 °, and the two parameter values have antenna radiation pattern measured data, are found in example Parameter value is 20 ° (parameter value 1), 25 ° (parameter value 2);Secondly, 20 ° of extracting parameter value (parameter value 1), 25 ° (parameter values 2) are right The two groups of differences and ratio-angle error data answered, referring to step S32;Finally, the angle error value according to this two groups of data is carried out in linear Insert, difference and ratio-angle error data that pitching beam scanning angle is 22 ° can be calculated, referring to step S33.It should be noted that this step During rapid Selecting All Parameters, need cycle detection whether there is the parameter of antenna method figure measured data, will each without antenna method figure reality Surveying the parameter of data is carried out such as the treatment of step S3, to obtain the corresponding difference of this group of parameter and ratio-angle error data.
Linear interpolation method is:
In above formula, x1 is parameter value 1, is 20 ° in this example;
X2 is parameter value 2, is 25 ° in this example;
X is the parameter value of angle error data to be calculated, and is 22 ° in this example;
Y1 is the angle error data under the conditions of parameter value 1;
Y2 is the angle error data under the conditions of parameter value 2;
Y is the angle error data to be asked for.
S4:Generation angle error tables of data, rearrangement and quantification treatment are entered for Angle Error data, are formed complete angle and are missed Difference data table.In specific implementation process, as shown in fig. 6, first, be extracted in all differences for being obtained in step S2, step S3 and Than-angle error data, referring to step S41;Then, rearrangement is entered by the address distribution method Angle Error data of memory, weight Angle Error data carry out quantification treatment during row, referring to step S42, finally, obtain angle error tables of data.Angle error tables of data bag Reference address and angle error data are included, angle error data include actual measurement angle error data and the virtual angle error data, address Corresponded with angle error data, the table is the foundation that angle error corrects engineering construction.
In specific implementation process, angle error engineering construction contains the Radar Signal Processing of prior art, radar scheduling And several parts of admission treatment.In embodiment, pre-processed by the angle error of the method, by determining parameter, antenna radiation pattern reality After surveying data processing, virtual data generation and the several processing module treatment of generation angle error tables of data, angle error tables of data is formed. By the angle error engineering construction of the method, by angle error tables of data burning in memory, in Radar Signal Processing, pass through By in Fig. 1 from receiver and channel signal processing module and signal and difference passage processing module difference signal input and Difference normalization module is carried out being calculated difference and compared, and the parameter value that the influence angle error be given with reference to radar scheduling is corrected is defeated Enter address and form module generation reference address, Angle Error tables of data is tabled look-up in reference address input memory, obtains mesh Target angle error Value Data.Other target components that the angle error data are obtained with signal transacting measurement are sent to admission treatment jointly Module is processed, and completes angle error correction.
Angle error tables of data in inquiry memory is specially:Address distribution method in memory, by parameter and Difference and ratio carry out coded treatment generation reference address, read angle error tables of data according to reference address, and then obtain angle error number According to angle error value corresponding with the reference address of generation in table.
And above-mentioned parameter value coding and difference and collectively constitute angle error tables of data reference address than coding, wherein, difference and The minimum quantization of ratio is only preferably poor and than computational accuracy half, can be adjusted as needed in other embodiment.It should be noted that , in different embodiments, parameters, difference and when the value specification of angle error with angle error tables of data this three The value specification for planting data is mutually unified.
The method of a kind of raising search radar Monopulse estimation precision that the present invention is provided, by using antenna radiation pattern reality The processing method that data processing and virtual data generation are combined is surveyed, angle measurement accuracy of the search radar to target is effectively improved, especially Angle measurement accuracy when it is larger target deviation beam center;Corrected by angle error and pre-processed, number is surveyed to antenna radiation pattern According to twice fitting treatment is carried out, the influence of noise Angle Error in antenna measurement is eliminated;In partial parameters without antenna radiation pattern In the case of measured data, virtual data is generated by interpolating method, the workload of antenna measurement is reduced, without measured data bar Also preferable certainty of measurement is can obtain under part.In angle error correction engineering construction, the angle error number obtained after to pretreatment Tabled look-up according to table, realized the real time correction of angle error, method is simple and easy to apply, the hardware device amount being related to is less.
The method effectively increases the angle measurement accuracy of traditional single pulse angle measurement side, and especially target deviates antenna beam center Angle measurement accuracy when larger.This method is applied to the relatively low search radar of Monopulse estimation radar, especially data transfer rate;Its In, the angle error data of correction both can be azimuth, or the angle of pitch.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any Those skilled in the art the invention discloses technical scope in, to the present invention deformation or replacement done, should all cover Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.

Claims (10)

1. it is a kind of improve search radar Monopulse estimation precision method, it is characterised in that including angle error pretreatment and angle miss Difference correction engineering construction;
Wherein, angle error pretreatment is comprised the following steps:
S1:It is determined that the parameters of influence angle error;
S2:For the parameter with actual measurement antenna direction data, the method being fitted using data ask for after data processing with Differ from and than corresponding actual measurement angle error data;
S3:For the parameter without actual measurement antenna direction data, carried out at interpolation using the data with actual measurement antenna direction Reason is obtained with difference and than corresponding virtual angle error data;
S4:The actual measurement angle error data and virtual angle error data are merged into generation angle error tables of data;
The angle error correction engineering construction includes:The angle error tables of data is stored in memory, by radar signal Reason module receiver export and channel signal, difference channel signal be normalized in the hope of going on business and comparing, by differ from and when with The angle error tables of data that the parameter value of the influence angle error correction that radar scheduling is given is inquired about in the memory, obtains angle error It is worth the angle error that target is measured with real time correction.
2. it is according to claim 1 improve search radar Monopulse estimation precision method, it is characterised in that the step In S1, influenceing the parameters of angle error includes working frequency, antenna beam sensing, antenna beamwidth.
3. the method for improving search radar Monopulse estimation precision according to claim 1, it is characterised in that the angle miss Difference data table includes reference address and angle error data, wherein, coding and the parameter value of the address including the difference and ratio Coding, the angle error data include actual measurement angle error data and the virtual angle error data, address and angle error data one One correspondence.
4. according to claim 1 or 3 raising search radar Monopulse estimation precision method, it is characterised in that it is described The determination method of the value specification of parameters includes parameter coding method, is specially encoded the value of parameter, and will ginseng Several codings as the reference address of the angle error tables of data a part;
The value specification of the difference and ratio include difference and ratio span and difference and minimum quantization two parts of ratio, the difference and The span of ratio is to differ from and than the maximum magnitude of monotone variation in actual measurement antenna direction data, the minimum quantization of the difference and ratio For difference and than the half of computational accuracy, and will difference and ratio coding as another portion of the reference address of the angle error tables of data Point;
The value specification of the angle error includes the span of angle error and minimum quantization two parts of angle error, and the angle is missed Poor span be survey in antenna direction data with difference and the corresponding angle error scope of maximum magnitude of ratio, the angle is missed Poor minimum quantization is to be determined according to the quantized value of radar angular;
Wherein, the parameters, difference and when the value specification of angle error and this three kinds in the angle error tables of data The value specification of data is mutually unified.
5. it is according to claim 1 improve search radar Monopulse estimation precision method, it is characterised in that the step When S2 carries out data processing using the method that data are fitted, to the corresponding data processing of any one group of parameter, specifically include:
S21:Reject the abnormal data in the directional diagram corresponding to actual measurement antenna direction data;
S22:The angular centre with wave beam and difference beam is asked for, and the angle error value at angular centre is set to 0;
S23:Difference near beam center and more interval than monotonic increase is determined, to determine effective error scope;
S24:Carry out curve fitting treatment to the directional diagram in effective error scope;
S25:Angle-data in effective error scope with difference beam directional diagram as running parameter, under the Fitting Calculation respective angles And beam power, obtain difference and compare, obtain angle error-difference and compare curve.
6. it is according to claim 5 improve search radar Monopulse estimation precision method, it is characterised in that to any ginseng Number, asks for being specifically included with difference and than the process of corresponding actual measurement angle error data:Method according to being fitted using data is carried out Angle error-difference after data processing and than curve, conversion differ from and ratio-angle error curve, and to differing from and ratio-angle error Curve carries out curve fitting;To the difference that quantifies and than data value one by one, and the Fitting Calculation difference and than corresponding angle error, such as angle Error is defined to the angle error result closest to calculating and meets angle outside predetermined angle error span, then by the angle error The data of error span, difference and ratio under the Parameter Conditions-angle error data are obtained with this.
7. it is according to claim 1 improve search radar Monopulse estimation precision method, it is characterised in that the step S3 is specially:To any one group of parameter x without actual measurement antenna direction data,
S31:Choose the two groups of parameter x for there are actual measurement antenna direction data near this group of parameter x1、x2, make at the parameter value of parameter x In parameter x1、x2Parameter value between;
S32:Extracting parameter x1、x2Difference and ratio-angle error corresponding relation data;
S33:Angle error value according to data are extracted carries out linear interpolation, to obtain the difference and ratio of parameter x-angle error corresponding relation Data.
8. it is according to claim 1 improve search radar Monopulse estimation precision method, it is characterised in that the step S4 is specially:The virtual angle error data that the actual measurement angle error data and step S3 that combining step S2 is obtained are obtained, are influenceed The difference and ratio-angle error data of all numerical value of the parameter of angle error correction, the address distribution method in memory, diagonally Error information is resequenced, and generates angle error tables of data;Wherein, Angle Error data are carried out when generating angle error tables of data Quantification treatment, the minimum quantization of quantification treatment is to be determined according to the quantized value of radar angular.
9. according to claim 1 or 3 raising search radar Monopulse estimation precision method, it is characterised in that inquiry Angle error tables of data in the memory is specially:Address distribution method in memory, by parameter and difference and than entering Row coded treatment generates reference address, and angle error tables of data is read according to reference address, so obtain in angle error tables of data with The corresponding angle error value of the reference address of generation.
10. a kind of device for improving search radar Monopulse estimation precision, it is characterised in that including angle error pretreatment unit and Angle error corrects engineering construction unit, wherein, the angle error pretreatment unit includes:Determine parameter module, antenna radiation pattern Measured data processing module, virtual data generation module and generation angle error tables of data module, the determination parameter module are used for It is determined that the parameter of influence angle error, the antenna radiation pattern measured data processing module is used to be directed to actual measurement antenna radiation pattern number According to parameter, using data fitting method ask for difference and than it is corresponding actual measurement angle error data;Virtual data generation treatment mould Block is used for for the parameter without actual measurement antenna direction diagram data, and carrying out interpolation treatment using measured data obtains virtual angle error number According to;The generation angle error data table handing module is used to enter rearrangement and amount to actual measurement angle error data and virtual angle error data Change is processed, and forms angle error tables of data;
Angle error correction engineering construction unit includes that Radar Signal Processing module, radar scheduler module, address form module, storage Device, admission processing module, the Radar Signal Processing module are used for from receiver and channel signal and difference channel signal And ratio poor with normalized is differed from, the address forms module and is used to receive difference and when comes from radar scheduler module Parameter carry out geocoding and obtain reference address, the memory is used to store the angle error tables of data and according to described Reference address searches corresponding angle error data, and the admission processing module is used for acceptance angle error information and from radar scheduling The parameter of module is corrected treatment with the measurement angle value after being corrected.
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