CN108152622A - For inhaling the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom - Google Patents
For inhaling the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom Download PDFInfo
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- CN108152622A CN108152622A CN201711366840.XA CN201711366840A CN108152622A CN 108152622 A CN108152622 A CN 108152622A CN 201711366840 A CN201711366840 A CN 201711366840A CN 108152622 A CN108152622 A CN 108152622A
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- communication system
- estimation method
- vehicular communication
- inhale
- frequency point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
Abstract
The invention belongs to the electromagnetic compatibility test assessment technology fields of communication system, and in particular to one kind is used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom.By the present invention in that the mass data measured with communication port derives the relationship between Vehicular communication system antenna port scan amplitude and sensitivity.The quantization conversion formula of the disturbed degree of Vehicular communication system is obtained by processing as input condition using antenna port test data and Sensitivity Calibration value, generates quantized data using reduction formula to judge the disturbed degree of Vehicular communication system.
Description
Technical field
The invention belongs to the electromagnetic compatibility test assessment technology fields of communication system, and in particular to one kind is used to inhale wave darkroom
The interior disturbed degree quantitative estimation method of Vehicular communication system.
Background technology
Military vehicle vehicle electronic device integrated level is higher and higher at present, and the increase of high-power electronic device causes electronics to do
It disturbs and greatly increases, receive sensitivity decrease after frequently resulting in Vehicular communication system installation, performance indicator is greatly reduced.Compel at this stage
Be essential ask can quickly, quantization show communication system installation after performance change, in the electromagnetism of military Vehicular communication system
In compatibility test assessment, there is presently no detailed quick wide frequency communication port quantization measuring methods to occur.Common communication
System testing appraisal procedure tested person condition, test mode and the influence for testing content, it is impossible to accurately reflect communication system comprehensively
The Electro Magnetic Compatibility of system.In order to overcome this problem, it needs to propose a kind of disturbed for inhaling Vehicular communication system in wave darkroom
The appraisal procedure of degree quantization.Quantized data is generated using this method to judge the disturbed degree of Vehicular communication system, Ke Yiti
The accuracy of height communication system EMC assessment.
Invention content
(1) technical problems to be solved
The technical problem to be solved by the present invention is to:How to provide one kind can accurate quantification Vehicular communication system installation after
The appraisal procedure of communication performance variation.This method mainly tests the communication system port coupled interference under complex environment in the car
Situation, the degree that can be interfered with accurate evaluation Vehicular communication system.
(2) technical solution
In order to solve the above technical problems, the present invention provides one kind for inhaling the disturbed degree amount of Vehicular communication system in wave darkroom
Change appraisal procedure, include the following steps:
Step S1, communication system antenna port noise level test data is obtained;
Step S2, extraction sampling frequency point;
Step S3, communication system Sensitivity Calibration value is obtained;
Step S4, quantized data is generated using reduction formula;
Step S5, the assessment of the disturbed situation of communication system is carried out.
Wherein, in the step 1, the measurement of communication system antenna port noise level is carried out inside anechoic chamber, is made
Test curve is measured with receiver.
Wherein, the test curve includes peak value scanning curve and average value scanning curve, uses the amplitude peaks of receiver
Value, amplitude average value detecting way measure peak value scanning curve and average value scanning curve.
Wherein, in the step 2, the peak value scanning curve and average value scanning curves and ambient trace that obtained to step 1
It is compared, the part higher more than 6dB than the test value amplification level in ambient trace is defined as interference region;In test curve
On interference region frequency range in selecting frequency point as sampling frequency point.
Wherein, the Frequency point with following characteristics is chosen in the interference region frequency range on test curve as sampling
Frequency point;
Sampling frequency point should at least while have two categories below feature:
● in interference region frequency range;
● peak amplitude is higher than centre frequency F0More than ± 25kHz peak amplitudes 3dB;
● the difference between peak value and mean value amplitude is within 6dB.
Wherein, in the step 3, inside anechoic chamber, respectively under conditions of noiseless environment and loading interference environment
The calibration of communication system sensitivity is carried out, records the communication system Sensitivity Calibration value under two states.
Wherein, in the step 4, communication system sensitivity that sampling frequency point and step 3 that step 2 is chosen measure as
Input condition uses reduction formula X=| A |-B, Y=| and A | the X of-C generations, Y value are as quantized data.
Wherein, A is the communication system Sensitivity Calibration value that step 3 obtains.
Wherein, B is amplitude of the sampling frequency point of step 2 selection on average value scanning curve;C is adopting for step 2 selection
Amplitude of the sample frequency point on peak value scanning curve.
Wherein, it after being ranked up to quantized data X, Y, compares respectively under noiseless environment with loading the amount under interference environment
Change data X, Y, compare the requirement in assessment level to judge the disturbed situation of communication system:
The assessment level of the disturbed situation of 1 communication system of table
。
(3) advantageous effect
Compared with prior art, the present invention provides one kind for inhaling the disturbed degree quantization of Vehicular communication system in wave darkroom
Appraisal procedure tests the situation of the Vehicular communication system port coupled interference under complex environment in the car, can quantify vehicle-mounted
The situation that communication performance reduces and communication range reduces after communication system installation, it is vehicle-mounted so as to accurately and rapidly assess
The degree that communication system is interfered.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention.
Fig. 2 is Vehicular communication system antenna port interference level test configurations composition schematic diagram of the present invention.
Fig. 3 is Vehicular communication system Sensitivity Calibration test configurations composition schematic diagram of the present invention.
Specific embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Specific embodiment is described in further detail.
To solve problem of the prior art, the present invention provides one kind for inhaling the disturbed degree of Vehicular communication system in wave darkroom
Quantitative estimation method includes the following steps:
Step S1, communication system antenna port noise level test data is obtained;
Step S2, extraction sampling frequency point;
Step S3, communication system Sensitivity Calibration value is obtained;
Step S4, quantized data is generated using reduction formula;
Step S5, the assessment of the disturbed situation of communication system is carried out.
Wherein, in the step 1, the measurement of communication system antenna port noise level is carried out inside anechoic chamber, is made
Test curve is measured with receiver.
Wherein, the test curve includes peak value scanning curve and average value scanning curve, uses the amplitude peaks of receiver
Value, amplitude average value detecting way measure peak value scanning curve and average value scanning curve.
Wherein, in the step 2, the peak value scanning curve and average value scanning curves and ambient trace that obtained to step 1
It is compared, the part higher more than 6dB than the test value amplification level in ambient trace is defined as interference region;In test curve
On interference region frequency range in selecting frequency point as sampling frequency point.
Wherein, the Frequency point with following characteristics is chosen in the interference region frequency range on test curve as sampling
Frequency point;
Sampling frequency point should at least while have two categories below feature:
● in interference region frequency range;
● peak amplitude is higher than centre frequency F0More than ± 25kHz peak amplitudes 3dB;
● the difference between peak value and mean value amplitude is within 6dB.
Wherein in the step 3, respectively in the condition of noiseless environment and loading interference environment inside anechoic chamber,
The lower calibration for carrying out communication system sensitivity, records the communication system Sensitivity Calibration value under two states.
Wherein, in the step 4, communication system sensitivity that sampling frequency point and step 3 that step 2 is chosen measure as
Input condition uses reduction formula X=| A |-B, Y=| and A | the X of-C generations, Y value are as quantized data;
Wherein, A is the communication system Sensitivity Calibration value that step 3 obtains;
B is amplitude of the sampling frequency point of step 2 selection on average value scanning curve;
C is amplitude of the sampling frequency point of step 2 selection on peak value scanning curve.
Wherein, it after being ranked up to quantized data X, Y, compares respectively under noiseless environment with loading the amount under interference environment
Change data X, Y, compare the requirement in assessment level to judge the disturbed situation of communication system:
The assessment level of the disturbed situation of 1 communication system of table
。
Embodiment 1
A kind of appraisal procedure for being used to inhale the disturbed degree quantization of Vehicular communication system in wave darkroom in the present embodiment passes through
Mass data is summarized, and summarizes the rule between sensitivity and antenna port level detecting and result.The rule of formation can
To simplify testing process, improve the accuracy of communication system test, can quickly, quantization shows after communication system installs
Performance change.
Specific embodiment includes:
The first step:Check whether Vehicular communication system is correctly installed and be operated in normal condition, all connectors
Whether connect and without the cable of damage.Vehicular communication system parameter is determined, including between operating frequency range, communication frequency point
Every, parameters such as bandwidth, the range of sensitivity, signal-to-noise ratio, radio frequency power output;
Second step:Carry out the test of Vehicular communication system antenna port interference level.It is vehicle-mounted logical in anechoic chamber, inner utilization
Letter system antenna connects measuring receiver as reception antenna and radiation interference transmitting possible in communications band is measured, and surveys
Trial is put as shown in Figure 2.The reception signal port of vehicle on-board antenna is connected to measuring receiver, is led in Vehicular communication system
Sweep check in the range of news frequency rate simultaneously records result (peak value, mean spectrum curve).
Third walks:The spectrum curve tested according to antenna port, in the measurement results selection interfere stronger region simultaneously
The frequency point of higher magnitude is selected in this region as the Frequency point that interference is generated to communication system.Specific selection method is shown in skill
Second step in art scheme.
4th step:The verification of communication system sensitivity quantitatively calibrating is carried out using radio comprehensive measurement instrument.During test according to
The impedance adjustment coupling network of test network makes impedance matching, and the range of 20~50dB, specific test configurations may be selected in attenuator
As shown in Figure 3.
5th step:The conversion sampled in the peak value of frequency point, mean value, the 4th step of Sensitivity Calibration value input technology scheme is public
Formula is calculated, and obtains the concrete numerical value of X, Y.
6th step:By the concrete numerical value of X, Y, sequentially sequence and list by size, compares and standard is assessed in the 5th step of technical solution
Requirement then judges the disturbed situation of communication system.
Embodiment 2
The present embodiment provides a kind of for inhaling the appraisal procedure of the disturbed degree quantization of Vehicular communication system in wave darkroom, such as scheme
Shown in 1, it the described method comprises the following steps:
S1, communication system antenna port noise level test data is obtained;
S2, extraction sampling frequency point are as input condition;
S3, communication system Sensitivity Calibration test data is obtained;
S4, quantized data is generated using reduction formula;
S5, the assessment for carrying out the disturbed situation of communication system.
Wherein, step S1 is specifically included:Test curve includes peak value scanning curve and average value scanning curve.
Wherein, step S2 is specifically included:According to peak value, Mean curve that port scan obtains, by comparing amplitude Characteristics
According to the condition for meeting sampling point feature, sampling frequency point and list are obtained after being screened to the frequency point in all interference regions.
Wherein, step S3 is specifically included:The sensitive number of degrees of communication system are demarcated respectively under noiseless and loading interference environment
Value.
Wherein, step S4 is specifically included:Using the obtained sampling frequency point of step S2 and step S3 and sensitivity data as defeated
Enter condition, use reduction formula X=| A |-B, Y=| A |-C generation quantized datas as the judgement of communication system disturbed degree according to
According to;
Wherein, step S5 is specifically included:Appraisal procedure is that the calling hierarchy compareed using quantized data in assessment level is come
Judge the disturbed situation of communication system.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. one kind is used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, which is characterized in that it is included such as
Lower step:
Step S1, communication system antenna port noise level test data is obtained;
Step S2, extraction sampling frequency point;
Step S3, communication system Sensitivity Calibration value is obtained;
Step S4, quantized data is generated using reduction formula;
Step S5, the assessment of the disturbed situation of communication system is carried out.
2. as described in claim 1 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, in the step 1, the measurement of communication system antenna port noise level is carried out inside anechoic chamber, uses receiver
Measure test curve.
3. as claimed in claim 2 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, the test curve includes peak value scanning curve and average value scanning curve, is put down using the magnitude peak of receiver, amplitude
The detecting way of mean value measures peak value scanning curve and average value scanning curve.
4. as claimed in claim 3 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, in the step 2, the peak value scanning curve and average value scanning curves that obtained to step 1 are compared with ambient trace,
The part higher more than 6dB than the test value amplification level in ambient trace is defined as interference region;Interference on test curve
Selecting frequency point is as sampling frequency point in the range of field frequency.
5. as claimed in claim 4 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, the Frequency point with following characteristics is chosen in the interference region frequency range on test curve as sampling frequency point;
Sampling frequency point should at least while have two categories below feature:
● in interference region frequency range;
● peak amplitude is higher than centre frequency F0More than ± 25kHz peak amplitudes 3dB;
● the difference between peak value and mean value amplitude is within 6dB.
6. as claimed in claim 5 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, in the step 3, communicates under conditions of noiseless environment and loading interference environment respectively inside anechoic chamber,
The calibration of system sensitivity records the communication system Sensitivity Calibration value under two states.
7. as described in claim 1 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, in the step 4, the communication system sensitivity that sampling frequency point and step 3 that step 2 is chosen measure is as input item
Part uses reduction formula X=| A |-B, Y=| and A | the X of-C generations, Y value are as quantized data.
8. as claimed in claim 7 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, A is the communication system Sensitivity Calibration value that step 3 obtains.
9. as claimed in claim 8 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is, B is amplitude of the sampling frequency point of step 2 selection on average value scanning curve;C is that the sampling frequency point that step 2 is chosen exists
Amplitude on peak value scanning curve.
10. as claimed in claim 9 be used to inhale the disturbed degree quantitative estimation method of Vehicular communication system in wave darkroom, feature
It is,
After being ranked up to quantized data X, Y, compare respectively under noiseless environment with loading interference environment under quantized data X,
Y compares the requirement in assessment level to judge the disturbed situation of communication system:
The assessment level of the disturbed situation of 1 communication system of table
。
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Cited By (1)
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