CN107831509A - A kind of detecting system of interference free performance - Google Patents
A kind of detecting system of interference free performance Download PDFInfo
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- CN107831509A CN107831509A CN201711084053.6A CN201711084053A CN107831509A CN 107831509 A CN107831509 A CN 107831509A CN 201711084053 A CN201711084053 A CN 201711084053A CN 107831509 A CN107831509 A CN 107831509A
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present embodiments relate to field of satellite navigation, discloses a kind of detecting system of interference free performance.The detecting system of interference free performance in the present invention, including switch arrays, interference source, signal source, equipment under test and main frame；Switch arrays connect interference source, signal source and equipment under test；Main frame is at least connected with signal source, and for controlling the signal source to generate signal, N is the integer more than 1；Equipment under test receives N number of first detection signal by the switch arrays, and receives N number of second detection signal by the switch arrays；Equipment under test is used to calculate each self-corresponding first carrier-to-noise ratio of N number of first detection signal, and calculates N number of each self-corresponding second carrier-to-noise ratio of second detection signal, for determining whether the antijamming capability of GPS of equipment under test is qualified.Present embodiment so that the antijamming capability of global positioning system in equipment under test can be rapidly and accurately detected, it is simple to operate, the cost of detection is reduced, improves detection efficiency.
Description
Technical field
The present embodiments relate to field of satellite navigation, more particularly to a kind of detecting system of interference free performance.
Background technology
GPS (The Global Navigation Satellite System, referred to as " GNSS "),
Also referred to as GLONASS, being can at the earth's surface or any place of terrestrial space provides the user round-the-clock three
The space base radio-navigation positioning system of dimension coordinate and speed and temporal information.
The whole world shares four big GPSs at present, is the global positioning system (Global in the U.S. respectively
Positioning System, referred to as " GPS "), China Beidou satellite navigation system (BeiDou Navigation
Satellite System, referred to as " BDS "), Russia GLONASS satellite navigation system (Global Navigation
Satellite System, referred to as " GLONASS ") and European Union galileo satellite navigation system (Galileo satellite
Navigation system, referred to as " GALILEO ").As BDS, GLONASS system in recent years is in comprehensive clothes of the Asian-Pacific area
Business is opened, and especially BDS systems develop more and more faster in civil area.GPS is in aviation, navigation, logical
Letter, personnel tracking, consumer entertainment, mapping, time service, vehicle monitoring management and auto navigation and information service etc. make extensively
With, and total development trend is to provide high accuracy service for application in real time.
GPS is during the use of reality, often by the shadow of interference signal in surrounding environment
Ring, so as to which correct location information can not be received, cause the GPS user equipment (referred to as " GUE ") can not
It is accurately positioned.At present, GPS user equipment generally has jamproof ability, and the whole world of different product is defended
The antijamming capability of star navigation system is different, therefore, to commenting for the antijamming capability of the product with GPS
It is very necessary to estimate.Inventor has found that at least there are the following problems in the prior art：At present to the global positioning system of product
Anti-interference test, be it is whether consistent according to the positioning result of detection means and equipment under test, detection equipment under test in interference
Under environment the positioning function of global positioning system whether normal operation, still, be not directed to and the product antijamming capability commented
Estimate, in addition, at present, during actually detected, typically under outdoor free environments, using real satellite signal and setting
Interference source builds test platform, and in test process, different GPSs is, it is necessary to re-start taking for environment
Build so that detecting system builds complexity, and detection device cost is high, and the operating procedure of detection is complicated, so as to cause detection speed slow.
The content of the invention
The purpose of embodiment of the present invention is to provide a kind of detecting system of interference free performance so that can be quick and precisely
The antijamming capability of global positioning system, simple to operate in ground detection equipment under test, reduces the cost of detection, improves detection effect
Rate.
In order to solve the above technical problems, embodiments of the present invention provide a kind of detecting system of interference free performance, bag
Include switch arrays, interference source, signal source, equipment under test and main frame；Switch arrays connect interference source, signal source and equipment under test；
Main frame is at least connected with signal source, for controlling the signal source to generate signal；Equipment under test receives N number of first by the switch arrays
Detection signal, and N number of second detection signal is received by the switch arrays, N is the integer more than 1, wherein, the first detection letter
Number it is the signal source successively according to the signal of each frequency values generation in predeterminated frequency set, second detection signal is first
The signal obtained in detection signal after interference signal of the superposition with identical frequency values, the interference signal are generated by interference source；Quilt
Measurement equipment is used to calculate each self-corresponding first carrier-to-noise ratio of N number of first detection signal, and calculates N number of second detection signal each
Corresponding second carrier-to-noise ratio, wherein, N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio, for determining that the whole world of equipment under test is defended
Whether the antijamming capability of star navigation system is qualified.
Embodiment of the present invention in terms of existing technologies, when carrying out interference free performance detection to equipment under test, is led to
Cross switch arrays to connect interference source, signal source, equipment under test so that without building the test environment of complexity, test wrapper in outdoor
Build simply in border.Main frame is connected with signal source, because main frame can generate signal with control signal source so that can be allowed by main frame
Signal source needs to generate signal specific according to test, without setting manually, meets the detection to various signals.In addition, right
When equipment under test carries out interference free performance detection, interference source, signal source, equipment under test are interconnected, and equipment under test passes through switch
Battle array receives first detection signal, and equipment under test calculates the carrier-to-noise ratio of the first detection signal upon receipt of the signals；It is tested to set
It is standby to receive the second detection signal by switch arrays, and the carrier-to-noise ratio of second detection signal is calculated, due to first detection signal only
The signal generated for signal source, and the second detection signal is to be superimposed interference signal in first detection signal, passes through the first carrier-to-noise ratio
With the second carrier-to-noise ratio, you can know whether the antijamming capability of the GPS of equipment under test is qualified, whole detection
Process is simple to operation, so as to accelerate the speed entirely detected, simultaneously as carrier-to-noise ratio is generally used for judging the matter of signal
Amount, therefore, judges whether the antijamming capability of the GPS of equipment under test is qualified by carrier-to-noise ratio, detection knot
Fruit is accurate.After by switch arrays, each equipment is connected, by the switch for adjusting interference source, you can quick detection goes out the first inspection
Survey signal and the second detection signal, it is simple to operate, further, since equipment under test be by switch arrays receive first detection signal and
Second detection signal so that the first detection signal and the second detection signal received is not easily susceptible to external influence, improves
Detect the degree of accuracy of the antijamming capability of global positioning system in equipment under test.
In addition, switch arrays include：Signal input interface, interference signal input interface, detection interface and middle converting interface；Signal
Input interface, interference signal input interface are connected with detection interface by middle converting interface, wherein, signal input interface and signal source
Delivery outlet connection, the delivery outlet of interference signal input interface and interference source connected, and detection interface is connected with the equipment under test.
Signal input interface, interference signal input interface, detection interface in switch arrays are connected by middle converting interface so that pass through switch
Battle array either interface can receive the signal of other interfaces transmission.
In addition, main frame is additionally operable to obtain N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio that equipment under test is calculated；
According to N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio, determining the antijamming capability of the GPS of equipment under test is
It is no qualified.N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio are obtained by main frame, and carried by N number of first carrier-to-noise ratio and N number of second
To make an uproar and compare, determine whether the antijamming capability of the GPS of equipment under test is qualified, the speed of host process data is fast,
Enhance the speed of the antijamming capability for the GPS for determining equipment under test.
In addition, main frame is specifically used for：The first load in predeterminated frequency set corresponding to each frequency values is calculated respectively to make an uproar
Than the difference with the second carrier-to-noise ratio, using difference as the carrier-to-noise ratio changing value corresponding to predeterminated frequency；Judge predeterminated frequency set
In each frequency values corresponding to carrier-to-noise ratio changing value whether belong in preset range, if, it is determined that equipment under test
The interference free performance of GPS is qualified, otherwise, it is determined that the anti-of the GPS of equipment under test is done
Immunity can be unqualified.Because each self-corresponding first carrier-to-noise ratio of the first detection signal generated under different frequency is different, different frequencies
Each self-corresponding second carrier-to-noise ratio of the second detection signal generated under rate is different, therefore, to being calculated under each frequency values
Carrier-to-noise ratio difference judged, enhance to the accurate of the antijamming capability of the GPS of equipment under test detection
Property.
In addition, main frame is additionally operable to：Obtain N number of first carrier-to-noise ratio that the equipment under test inputted by inputting interface is calculated
And N number of second carrier-to-noise ratio, or, receive N number of first carrier-to-noise ratio of equipment under test transmission and N number of second carrier-to-noise ratio.Carry
Supply two kinds of main frames to obtain the mode of N number of first carrier-to-noise ratio that equipment under tests are calculated and N number of second carrier-to-noise ratio, enhance master
Machine obtains the flexibility of N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio.
In addition, each line loss value that main frame is additionally operable in the first line loss set determines that signal source generates each time
The intensity of one detection signal, and control signal source generates first detection signal according to the intensity of the first detection signal of determination.By
Loss when signal transmits in the line be present, therefore by each line loss value in the first line loss set, determine each secondary
Into the intensity of first detection signal, so as to accurately determine the intensity of first detection signal that equipment under test receives, and then
Enhance the accuracy of the antijamming capability detection of the GPS of equipment under test.
In addition, the first line loss set is：Connected in frequency spectrograph and the detection interface of switch arrays, signal input interface and interference
The delivery outlet connection in source, in the case that the interference signal input interface carries out anti-tampering processing, interference source is successively according to described pre-
If the line loss value that the signal of each frequency values generation transmits between frequency spectrograph and the signal input interface in frequency sets
Set.The detection interface of switch arrays is connected with frequency spectrograph, can quickly detect the line for the signal that current spectral instrument receives
Damage, in addition, when calculating the first line loss set, anti-tampering processing is carried out to the interference signal input interface of switch arrays, enhanced
Determine the accuracy of the first line loss set.
In addition, main frame is connected with interference source, for controlling interference source to generate interference signal.Main frame is connected with interference source, is made
The interference signal of generation can flexibly be controlled according to being actually needed by obtaining main frame.
Brief description of the drawings
One or more embodiments are illustrative by the picture in corresponding accompanying drawing, these exemplary theorys
The bright restriction not formed to embodiment, the element for having same reference numbers label in accompanying drawing are expressed as similar element, removed
Non- have a special statement, and composition does not limit the figure in accompanying drawing.
Fig. 1 is illustrated according to a kind of concrete structure of detecting system of interference free performance in first embodiment of the invention
Figure；
Fig. 2 is shown according to a kind of specific attachment structure of the detecting system of interference free performance in first embodiment of the invention
It is intended to；
Fig. 3 is according to a kind of idiographic flow for obtaining the first carrier-to-noise ratio and the second carrier-to-noise ratio in first embodiment of the invention
Schematic diagram；
Fig. 4 is shown according to a kind of specific attachment structure of the detecting system of interference free performance in second embodiment of the invention
It is intended to；
Fig. 5 is detection the first line loss collection according to a kind of detecting system of interference free performance in third embodiment of the invention
The attachment structure schematic diagram of conjunction；
Fig. 6 is the line loss of detection first according to a kind of detecting system of interference free performance in third embodiment of the invention
Schematic flow sheet；
Fig. 7 is detection the second line loss collection according to a kind of detecting system of interference free performance in third embodiment of the invention
The attachment structure schematic diagram of conjunction；
Fig. 8 is the line loss of detection second according to a kind of detecting system of interference free performance in third embodiment of the invention
Schematic flow sheet；
Fig. 9 is shown according to a kind of specific attachment structure of the detecting system of interference free performance in four embodiment of the invention
It is intended to；
Figure 10 is to detect the first line loss collection according to a kind of detecting system of interference free performance in four embodiment of the invention
The attachment structure schematic diagram of conjunction；
Figure 11 is the detection First Line according to the detecting system of another interference free performance in four embodiment of the invention
Damage the attachment structure schematic diagram of set.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order that reader more fully understands the application and proposes many ins and outs.But even if without these ins and outs
With many variations based on following embodiment and modification, the application technical scheme claimed can also be realized.
The first embodiment of the present invention is related to a kind of detecting system of interference free performance.The detection system of the interference free performance
System, including：Switch arrays 101, interference source 102, signal source 103, equipment under test 104 and main frame 105.Specific structure such as Fig. 1 institutes
Show.
Switch arrays 101 connect interference source 102, signal source 103 and equipment under test 104.Specifically, interference source 102,
Signal source 103 and equipment under test 104 are connected with switch arrays 101 respectively, by switch arrays by interference source 102, signal source 103 with
And equipment under test 104 connects.
Preferably, switch arrays 101 include：Signal input interface 1011, interference signal input interface 1012, detection interface
1013 and middle converting interface 1014, the structured flowchart of specific switch arrays 101 it is as shown in Figure 2.
Signal input interface 1011, interference signal input interface 1012 and detection interface 1013 are connected by middle converting interface 1014
Connect, wherein, signal input interface 1011 is connected with the delivery outlet of signal source 103, interference signal input interface 1012 and interference source
102 delivery outlet connection, detection interface 1013 are connected with equipment under test 104.
Specifically, the inside of middle converting interface 1014 can be open flexible PCB, and converting interface 1014 can be set in this
The interface of more than 3 is put, is illustrated in present embodiment so that the number of interface is 3 as an example, it is soft that 3 interfaces all access same
On property circuit board.And signal input interface 1011, interference signal input interface 1012 and the detection interface 1013 of switch arrays 101 divide
It is not connected with 3 interfaces of middle converting interface 1014.The signal input interface 1011 of switch arrays 101 connects with the output interface of signal source
Connect, interference signal input interface 1012 is connected with the output interface of interference source 102, detection interface 1013 connect with equipment under test 104
Connect, so as to realize the connection of interference source 102, signal source 103 and equipment under test 104.
Main frame 105 is at least connected with signal source 103, and for controlling the signal source 103 to generate signal, N is whole more than 1
Number.
Specifically, main frame 105 can be the computer for having processing function, and signal source 103 can be simulation of global satellite
The signal source of navigation system, for example, gps signal simulative generator；Main frame 105 can pass through connecting line (such as signal serial ports) and letter
Number source 103 connects, main frame 105 can be generated by the software design patterns signal source 103 supporting with signal source 105 signal frequency,
The parameters such as intensity, main frame 105 can be with the opening and closing in control signal source 103.By main frame 105, letter can be flexibly controlled
Number source 103 generates specific signal.
Equipment under test 104 receives N number of first detection signal by the switch arrays 101, and is received by the switch arrays 101
N number of second detection signal, wherein, the first detection signal is the signal source 103 successively according to each frequency in predeterminated frequency set
The signal of rate value generation, after second detection signal is interference signal of the superposition with identical frequency values in first detection signal
Obtained signal, the interference signal are generated by interference source；Equipment under test 104 each corresponds to for calculating N number of first detection signal
The first carrier-to-noise ratio, and calculate N number of each self-corresponding second carrier-to-noise ratio of second detection signal, wherein, N number of first carrier-to-noise ratio with
And N number of second carrier-to-noise ratio, for determining whether the antijamming capability of GPS of equipment under test is qualified.
Specifically, switch arrays 101 connect interference source 102, signal source 103 and equipment under test 104, main frame 105 with
After signal source 103 connects, the detection interface of switch arrays 101 is connected with equipment under test 104, and the interference signal of switch arrays 101 is defeated
Incoming interface 1012 is connected with the delivery outlet of interference source 102, and the signal input interfaces 1011 of switch arrays 101 is defeated with signal source 103
Outlet connection.The middle frequency that current GPS is commonly divided into civilian uses according to the frequency of use (is used
" L1 " is represented) and military use frequency (with " L2 " expression), and the L1 wave bands of different GPSs and L2 ripples
Duan Butong, for example, the L1 frequencies of GPS receiver signal are 1575.42MHz, the L1 frequencies of BDS reception signals are 1616MHz.This reality
Apply in mode, illustrated by taking the GPS GPSs of civilian uses as an example.In order to strengthen the accuracy of detection, if
Predeterminated frequency set is put, the frequency in predeterminated frequency set should meet the L1 frequency ranges of Present Global satellite navigation system
Interior, L1 frequency ranges are 1500MHz to 1660MHz.Frequency number in present embodiment in predeterminated frequency set can be 1
It is individual, more than 2, using the number of predeterminated frequency set as 5 in present embodiment, respectively 1524MHz, 1548MHz,
Illustrated exemplified by 1554MHz, 1615MHz and 1627MHz.
Multiple predeterminated frequency values are included in predeterminated frequency set, because signal source 103 is successively according in predeterminated frequency set
Each frequency values generation signal, equipment under test 104 receive the mode of the signal of corresponding each frequency values, and calculate each frequency
The process of each self-corresponding carrier-to-noise ratio of signal of value is identical, therefore, in present embodiment will be described in detail equipment under test 104 and passes through
Switch arrays 101 receive a first detection signal, and calculate the process of the first carrier-to-noise ratio corresponding to the first detection signal, with
And second detection signal is received by switch arrays 101, the process of the second carrier-to-noise ratio corresponding to the second detection signal is calculated,
Wherein, during this, first detection signal is the signal that signal source generates according to a frequency values in predeterminated frequency set.Tool
Body obtains the first carrier-to-noise ratio and the process of the second carrier-to-noise ratio is as shown in Figure 3.
Step S10, close interference source 102.
Specifically, can be with manual-lock interference source 102 so that the interference signal input interface 1012 of switch arrays 101 does not have
There is signal to be passed to, so as to ensure that equipment under test 104 will not receive interference signal.
Step S11, opening signal source 103, and setting signal source 103 generate the parameters of signal.
Specifically, the parameter that signal source 103 generates signal can be the frequency of signal generation, signal type, Yi Jixin
Number generation intensity.The parameters that main frame 105 can generate signal by software to signal source 103 are configured, for example, main
Machine by software design patterns signal source generate signal frequency be predeterminated frequency in 1524MHz, set generation signal intensity for-
130dBm, the type for setting generation signal is gps signal.After completing to signal source parameter setting, control signal source is according to setting
Parameters generation signal.
Step S12, opens the GPS functions of equipment under test 104, and calculates current the by the software for calculation of signal carrier-to-noise ratio
First carrier-to-noise ratio corresponding to one detection signal.
Specifically, equipment under test 104 can be the mobile phone with GPS functions, PAD, removable computer etc..Equipment under test
104 first detection signals generated by switch arrays 101 reception signal sources 103, hold according to the software for calculation of signal carrier-to-noise ratio
Row flow, the carrier-to-noise ratio of current gps signal is calculated according to the first detection signal received, after the value stabilization of carrier-to-noise ratio,
Record the value of the carrier-to-noise ratio, and the carrier-to-noise ratio value using the carrier-to-noise ratio as the first detection signal received under current frequency.
Step S13, interference source 102 is opened, and the parameters of the generation signal of interference source 102 are set.
Specifically, the parameters of the generation of interference source 102 signal can include：The frequency of signal generation, intensity, signal
Type and the bandwidth of signal etc..The mode of setting can by the way of setting manually, wherein, the generation of interference source 102 frequency
Rate is identical with the frequency values of current first detection signal, and other parameters can be set according to actual conditions.It is for example, it is assumed that tested
The frequency values corresponding to first detection signal that equipment receives are 1524MHz, then open interference source, and set interference source generation letter
Number frequency values be 1524MHz, set generation signal intensity be -65dBm, waveform is arranged to additive white Gaussian noise
(Additive White Gaussian Noise, referred to as " AWGN "), with a width of 1MHz.
Step S14, equipment under test 104 are calculated corresponding to current second detection signal by the software for calculation of signal carrier-to-noise ratio
Second carrier-to-noise ratio.
Specifically, equipment under test 104 receives the second detection signal by switch arrays 101, current second inspection received
Signal is surveyed to be obtained in current first detection signal after interference signal of the superposition with identical frequency values.The meter of signal carrier-to-noise ratio
The carrier-to-noise ratio that software calculates current gps signal according to the second detection signal received is calculated, after the value stabilization of carrier-to-noise ratio, note
Record the value of the carrier-to-noise ratio, and the carrier-to-noise ratio value using the value of the carrier-to-noise ratio as the second detection signal received under current frequency.
It is noted that the S1 to step S5 that repeats the above steps, you can obtain equipment under test 104 and calculate N number of first inspection
Survey the first carrier-to-noise ratio corresponding to signal, and calculate the second carrier-to-noise ratio corresponding to N number of second detection signal, N value with it is pre-
It is identical that if the frequency values in frequency sets obtain number.Therefore, will not be described in great detail herein.
In addition, N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio, for determining the global navigation satellite system of equipment under test
Whether the antijamming capability of system is qualified.Specific deterministic process can be by being accomplished manually.
Specifically, the first carrier-to-noise ratio in predeterminated frequency set corresponding to each frequency values is calculated respectively to carry with second
Make an uproar than difference, using difference as the carrier-to-noise ratio changing value corresponding to predeterminated frequency；Judge each in predeterminated frequency set
Whether the carrier-to-noise ratio changing value corresponding to frequency values belongs in preset range, if, it is determined that the global satellite of equipment under test is led
The interference free performance of boat system is qualified, otherwise, it is determined that the interference free performance of the GPS of equipment under test does not conform to
Lattice.The deterministic process is will be exemplified in detail below.
Assuming that there are 3 frequency values, respectively 1524MHz, 1548MHz and 1627MHz in predeterminated frequency set, according to step
Rapid S1 to step S5, the first carrier-to-noise ratio value that equipment under test A is calculated in the case of 1524MHz is L, the second carrier-to-noise ratio value is
K, be calculated the first carrier-to-noise ratio value in the case of 1548MHz be M, the second carrier-to-noise ratio value be O, be calculated in 1627MHz
In the case of the first carrier-to-noise ratio value be N, the second carrier-to-noise ratio value be P；The preset range of difference is more than -1 and the scope less than 1, i.e., -
1≤ΔC≤1.So, the anti-interference process for judging the GPS of the equipment under test is：Calculate in 1524MHz frequencies
The first carrier-to-noise ratio and the second carrier-to-noise ratio difference DELTA C1 under rate are L-K, calculate the first carrier-to-noise ratio under 1548MHz frequencies and
Two carrier-to-noise ratio difference DELTA C2 are M-O, and it is N- to calculate the first carrier-to-noise ratio under 1627MHz frequencies with the second carrier-to-noise ratio difference DELTA C3
P, in the range of judging whether Δ C1, Δ C2 and Δ C3 value belong to Δ C respectively, if Δ C1, Δ C2 and Δ C3 value
Belong in the range of Δ C, it is determined that the interference free performance of equipment under test A GPSs is qualified, otherwise, then really
The interference free performance of fixed equipment under test A GPSs is unqualified.
It should be noted that the detecting system of interference free performance also includes screened room, by switch arrays 101, interference source 102,
Signal source 103, equipment under test 104 and main frame 105 are placed in screened room, and anti-interference is carried out to equipment under test in screened room
The detection of energy, wherein, the material of screened room is metal, for when carrying out anti-interference detection to equipment under test, shielding extraneous letter
The interference number to caused by equipment under test, ensure that the accuracy for the detection that interference free performance is carried out to equipment under test.
Embodiment of the present invention in terms of existing technologies, when carrying out interference free performance detection to equipment under test, is led to
Cross switch arrays to connect interference source, signal source, equipment under test so that without building the test environment of complexity, test wrapper in outdoor
Build simply in border.Main frame is connected with signal source, because main frame can generate signal with control signal source so that signal source can be according to
Test needs to generate signal specific, meets the detection to various signals.In addition, interference free performance detection is being carried out to equipment under test
When, interference source, signal source, equipment under test are interconnected, and equipment under test receives first detection signal, equipment under test by switch arrays
The carrier-to-noise ratio of the first detection signal is calculated after signal is received；Equipment under test receives the second detection by switch arrays to be believed
Number, and the carrier-to-noise ratio of second detection signal is calculated, because first detection signal is only the signal of signal source generation, and the second inspection
It is to be superimposed interference signal in first detection signal to survey signal, passes through the first carrier-to-noise ratio and the second carrier-to-noise ratio, you can knows tested set
Whether the antijamming capability of standby GPS is qualified.By switch arrays, after each equipment connection, pass through regulation
The switch of interference source, you can quick detection goes out first detection signal and the second detection signal, simple to operate, further, since tested
Equipment is to receive first detection signal and the second detection signal by switch arrays so that the first detection signal received and second
Detection signal is not easily susceptible to external influence, improve detection equipment under test in global positioning system antijamming capability it is accurate
Degree.
Second embodiment of the present invention is related to a kind of detecting system of interference free performance.Second embodiment is first real
The further improvement of mode is applied, is mainly theed improvement is that：In second embodiment of the invention, main frame 105 is additionally operable to obtain
N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio that equipment under test 104 is calculated；According to N number of first carrier-to-noise ratio and N number of
Two carrier-to-noise ratios, determine whether the antijamming capability of the GPS of equipment under test 104 is qualified, N is whole more than 1
Number.Preferably, main frame is used to obtain N number of first carrier-to-noise ratio and the N that the equipment under test inputted by inputting interface is calculated
Individual second carrier-to-noise ratio；Or main frame 105 receives N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio that equipment under test is sent.Tool
Body says that main frame 105 can not be communicatively coupled with equipment under test 104, the inputting interface input equipment under test of main frame 105
104 N number of first carrier-to-noise ratios being calculated and N number of second carrier-to-noise ratio.Or main frame 105 can communicate with equipment under test 104
Connect, do not limit the mode of communication connection in present embodiment, can be the mode or wireless connection of wired connection
Mode.Equipment under test 104 sends obtained N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio to main frame 105.Equipment under test 104
First carrier-to-noise ratio is often calculated just together to send out the frequency values corresponding to first carrier-to-noise ratio and first carrier-to-noise ratio
Deliver to main frame 105；Second carrier-to-noise ratio is often calculated just by corresponding to second carrier-to-noise ratio and second carrier-to-noise ratio
Frequency values are sent to main frame 105.Connection between main frame 105 and equipment under test 104 is as shown in Figure 4.
Preferably, main frame 105 is specifically used for：First in predeterminated frequency set corresponding to each frequency values is calculated respectively
The difference of carrier-to-noise ratio and the second carrier-to-noise ratio, using difference as the carrier-to-noise ratio changing value corresponding to predeterminated frequency；Judge predeterminated frequency
Whether the carrier-to-noise ratio changing value corresponding to each frequency values in set belongs in preset range, if, it is determined that it is tested to set
The interference free performance of standby GPS is qualified, otherwise, it is determined that the GPS of equipment under test
Interference free performance is unqualified.
, can be with it is noted that after the interference free performance of GPS of equipment under test is judged
It will determine that result is shown on the display screen of main frame, or testing staff's testing result informed by way of voice broadcast.Its
In, in present embodiment, main frame specifically judges the process of the interference free performance of the GPS of current equipment under test
It is roughly the same with the deterministic process in first embodiment, it will not be described in great detail in present embodiment.
The detecting system for the interference free performance that present embodiment provides, N number of first carrier-to-noise ratio and N number of second are obtained by main frame
Carrier-to-noise ratio, and by N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio, determine equipment under test GPS it is anti-
Whether interference performance is qualified, because the speed of host process data is fast, enhances the global navigation satellite system for determining equipment under test
The speed of the antijamming capability of system.Additionally, it is provided two kinds of main frames obtain N number of first carrier-to-noise ratio that equipment under tests are calculated and
The mode of N number of second carrier-to-noise ratio, enhance the flexibility that main frame obtains N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio.
Third embodiment of the invention is related to a kind of detecting system of interference free performance.3rd embodiment is the second implementation
The further improvement of mode, is mainly theed improvement is that：In the present embodiment, main frame is additionally operable to：According to the first line loss set
In each line loss value determine that signal source generates the intensity of first detection signal each time, and control signal source is according to determination
The intensity generation first detection signal of first detection signal.Main frame 105 is additionally operable to each line in the second line loss set
Damage value determines that interference source generates the intensity of interference signal each time, and controls interference source to be given birth to according to the intensity of the interference signal of determination
Into interference signal.
Specifically, because signal has line loss in transmitting procedure so as to the global navigation satellite system of equipment under test
During the detection of the interference free performance of system, the intensity for the first detection signal that equipment under test 104 receives reduces, and causes the knot of detection
Fruit has error.Therefore, in present embodiment, each the line loss value of main frame 105 in the first line loss set determines signal source
The intensity of the first detection signal generated each time, and control signal source is according to the intensity generation the of the first detection signal of determination
One detection signal.The intensity process for determining the first detection signal that signal source 103 generates each time is：Equipment under test receives
The preset strength value of one detection signal is plus the first detection signal that the first line loss value of the frequency is that signal source 103 generates
Intensity, for example, it is assumed that under 1524MHz frequencies, the preset strength value of the first detection signal that equipment under test receives for-
130dBm, the first line loss value in the first line loss set under 1524MHz frequencies are F.Then according to the first line loss value, letter is determined
The intensity level of number source generation first detection signal is (- 130+F) dBm.
Preferably, the first line loss set is：Connected in frequency spectrograph and the detection interface of switch arrays, signal input interface is with doing
The delivery outlet connection in source is disturbed, in the case that interference signal input interface carries out anti-tampering processing, interference source is successively according to default frequency
The set for the line loss value that the signal of each frequency values generation transmits between frequency spectrograph and the signal input interface in rate set.
Specific attachment structure is as shown in Figure 5.
Specifically, in room is shielded, frequency spectrograph and the detection interface of switch arrays are connected, signal input interface and interference
The delivery outlet connection in source, interference signal input interface carries out anti-tampering processing, and (e.g., the interface connects 50 ohm of matching resistances
It is anti-；Or the signal source of one closed mode of connection)；After the connection of all devices is completed, acquisition is described in detail below
The process of a line loss value in first line loss set, idiographic flow are as shown in Figure 6.
Step S30, interference source 102 is opened, and the parameters of the generation signal of interference source 102 are set.
Specifically, the parameters of the generation of interference source 102 signal can include：The frequency of signal generation, intensity, signal
Type and the bandwidth of signal etc..Wherein, the frequency of signal generation is set according to the frequency values in predeterminated frequency set.For example,
Assuming that the element number that includes of predeterminated frequency set is 5, each predeterminated frequency value be respectively 1524MHz, 1548MHz,
1554MHz, 1615MHz and 1627MHz, then it is 1524MHz by the generation set of frequency of interference source 102, generates the strong of signal
It is continuous wave (Continuous Wave, referred to as " CW ") signal to spend for 0dBm, waveform.
Step S31, frequency spectrograph is opened, and the parameters of the frequency spectrograph are set.
Specifically, it is necessary to set the centre frequency of frequency spectrograph, scan frequency width (SPAN), amplitude (AMPT), differentiate
Rate bandwidth (RBW), video bandwidth (VBW) etc., other parameters then use default parameters, without change；Wherein, in frequency spectrograph
Frequency of heart is identical with the frequency values of the interference source 102 in step S30.For example, it is assumed that the frequency of the generation signal of interference source is
1523MHz, then be arranged to 1524MHz by the centre frequency of frequency spectrograph, and SPAN is arranged into 10M, and AMPT is arranged into 10dBm,
RBW is arranged to 1MHz, VBW is arranged to 1MHz, and other specification uses default value.
Step S32, the first line loss value is measured by frequency spectrograph.
Specifically, the switch that interference source 102 generates signal is opened, interference source 102 generates signal.Click on the peak of frequency spectrograph
Value search (Peak Search) button, reads the result that this time-frequency spectrometer is shown, and using the result as first line loss
Value.
It should be noted that the element number in the first line loss set is identical with the element number in predeterminated frequency set,
And corresponded with predeterminated frequency, for example, it is assumed that the element number that predeterminated frequency set includes is 5, respectively 1524MHz,
1548MHz, 1554MHz, 1615MHz and 1627MHz, then, 5 elements are included in the first obtained line loss set, respectively
For what is obtained under the first line loss obtained under 1524MHz frequencies, the first line loss obtained under 1548MHz frequencies, 1554MHz frequencies
The first line loss obtained under the first line loss and 1627MHz frequencies that are obtained under first line loss, 1615MHz frequencies.Certainly, obtain
The step of other element values in first line loss set, is consistent to step S32 with above-mentioned steps S30, no longer goes to live in the household of one's in-laws on getting married one by one herein
State.
Preferably, each line loss value that main frame 105 is additionally operable in the second line loss set determines interference source each time
The intensity of interference signal is generated, and controls interference source to generate interference signal according to the intensity of the interference signal of determination.Specifically,
The intensity process for determining the interference signal that interference source 102 generates each time is：Equipment under test receives the default strong of interference signal
Degree is plus the intensity that the second line loss value of the frequency is the interference signal that interference source 102 generates, for example, it is assumed that in 1524MHz
Under frequency, the preset strength for the interference signal that equipment under test receives is -65dBm, in 1524MHz frequencies in the second line loss set
Under the second line loss value be A.Then according to the first line loss value, determine that the intensity level that signal source generates the second detection signal is (- 65
+A)dBm。
Preferably, the second line loss collection is combined into：Connected in frequency spectrograph and the detection interface of switch arrays, signal input interface and letter
In the case of the delivery outlet connection of the delivery outlet connection in number source, interference signal input interface and interference source, interference source successively according to
The line loss value that the signal of each frequency values generation transmits between frequency spectrograph and interference signal input interface in predeterminated frequency set
Set.Specific attachment structure is as shown in Figure 7.
Specifically, in room is shielded, frequency spectrograph and the detection interface of switch arrays are connected, signal input interface and signal
The delivery outlet of the delivery outlet connection in source, interference signal input interface and interference source connects；After the connection of all devices is completed,
The process for obtaining a line loss value in the second line loss set is described in detail below.Idiographic flow is as shown in Figure 8.
Step S40, interference source 102 is opened, and the parameters of the generation signal of interference source 102 are set.
Step S41, frequency spectrograph is opened, and the parameters of the frequency spectrograph are set.
Step S42, the second line loss value is measured by frequency spectrograph.
It should be noted that step S40 to step S42 is roughly the same to step S32 with step S30, will no longer go to live in the household of one's in-laws on getting married herein
State, wherein, during the second line loss value is obtained by frequency spectrograph, signal source 103 is not turned on the function of signal generation.
In addition, main frame 105 is connected with interference source 102, for controlling interference source 102 to generate interference signal.Specifically, will
Main frame 105 is connected with interference source 102, by the software in main frame 105, can set the parameters of interference source 102, in addition,
By software interference source 102 can also be controlled to generate signal.
The detecting system for the interference free performance that present embodiment provides, loss when being transmitted in the line due to signal be present,
Therefore by each line loss value in the first line loss set, it is determined that the intensity of first detection signal is generated each time, so as to
The intensity of the accurate first detection signal for determining equipment under test and receiving, and then enhance the global navigation satellite system of equipment under test
The accuracy of the antijamming capability detection of system.In addition, by each line loss value in the second line loss set, it is determined that generation is dry each time
The intensity of signal is disturbed, so as to prepare the intensity for the interference signal that determination equipment under test receives, further ensures detection
The degree of accuracy of the antijamming capability of the global navigation satellite of equipment under test.
Four embodiment of the invention is related to a kind of detecting system of interference free performance.4th embodiment is the 3rd implementation
The further improvement of mode, is mainly theed improvement is that：In present embodiment, the number of the signal input interface of switch arrays 101
For the integer more than 1.
Specifically, switch arrays 101 include at least one signal input interface, for example, switch arrays 101 include：2 signals
The interference signal input interface 1012,1 of input interface 1011,1 detects interface 1013 and a middle converting interface 1014.Two letters
Number input interface 1011 (signal input interface 1011-1 and signal input interface 1011-2) each with a signal source 103 (letter
Number source 103-1 and signal source 103-2) connection；Such as：Signal input interface 1011-1 is connected with signal source 103-1, and signal input connects
Mouth 1011-2 is connected with signal source 103-2.In present embodiment, the number of signal input interface is not limited, and present embodiment will
Illustrated by taking 2 signal input interfaces as an example.
When carrying out the detection of interference free performance, signal input interface 1011-1 is connected with signal source 103-1, signal input
Interface 1011-2 is connected with signal source 103-2, in the connected mode of other interfaces of switch arrays 101 and above-mentioned embodiment
Connected mode is roughly the same, when calculating equipment under test 104 receives signal source 103-1 the first carrier-to-noise ratio and the second carrier-to-noise ratio,
Signal source 103-2 is closed, and does not generate signal, similarly, calculates the first carrier-to-noise ratio that equipment under test 104 receives signal source 103-2
During with the second carrier-to-noise ratio, signal source 103-1 is closed, and does not generate signal.Wherein, signal source 103-1 and signal source 103-2 signal
Type is different (e.g., signal source 103-1 generates gps signal, signal source 103-2 generation GALILEO signals), and specific attachment structure is such as
Shown in Fig. 9.
In addition, calculate signal signal input interface and detection interface between line loss set when, signal source 103-1 and
Opened during signal source 103-2 differences, attachment structure as shown in Figure 10, calculating signal in signal input interface 1011-1 and inspection
When surveying the first line loss set and the second line loss set between interface 1013, frequency spectrograph and the detection interface 1013 of switch arrays 101
Connection, signal input connect 1011-1 mouths and are connected with the delivery outlet of interference source 102, and interference signal input interface 1012 carries out anti-tampering
Processing, signal input interface 1011-2 is connected with signal source 103-2, and when detecting the first line loss set, signal source 103-2 is closed
Close, do not generate signal, with the first line loss collection class seemingly, here is omitted for the second line loss set of detection.Believing calculating signal
During the first line loss set between number input interface 1011-2 and detection interface 1013, frequency spectrograph and the detection of switch arrays 101 connect
Mouth 1013 connects, and signal input connects 1011-1 mouths and is connected with signal source 103-1 delivery outlet, and interference signal input interface 1012 enters
The anti-tampering processing of row, signal input interface 1011-2 is connected with interference source 102, when detecting the first line loss set, signal source
103-1 is closed, and does not generate signal, specific attachment structure is as shown in figure 11.Detect the second line loss set and the first line loss collection class
Seemingly, here is omitted.
In present embodiment, according to the first carrier-to-noise ratio and the second carrier-to-noise ratio of signal, the global satellite of equipment under test is determined
Whether qualified the antijamming capability of navigation system process be roughly the same with the process in above-mentioned embodiment, herein will no longer
Repeat.
The detecting system of the interference free performance provided in present embodiment, connect by setting the signal of multiple switch battle array to input
Mouthful so that the detecting system can detect the anti-interference ability of different types of Global Navigation System of equipment under test, enhancing
The flexibility of the detection antijamming capability of the system and applicability.
It will be appreciated by those skilled in the art that realize that all or part of step in above-described embodiment method is to pass through
Program instructs the hardware of correlation to complete, and the program storage is in the storage medium, including some instructions are causing one
Individual equipment (can be single-chip microcomputer, chip etc.) or processor (processor) perform each embodiment methods described of the application
All or part of step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
- A kind of 1. detecting system of interference free performance, it is characterised in that including：Switch arrays, interference source, signal source, equipment under test And main frame；The switch arrays connect the interference source, the signal source and the equipment under test；The main frame is at least connected with the signal source, for controlling the signal source generation signal；The equipment under test receives N number of first detection signal by the switch arrays, and receives N number of the by the switch arrays Two detection signals, N are the integer more than 1, wherein, the first detection signal is the signal source successively according to predeterminated frequency collection The signal of each frequency values generation in conjunction, second detection signal are that superposition has same frequency in the first detection signal The signal obtained after the interference signal of rate value, the interference signal are generated by the interference source；The equipment under test, for calculating each self-corresponding first carrier-to-noise ratio of N number of first detection signal, and calculate N number of Each self-corresponding second carrier-to-noise ratio of second detection signal, wherein, N number of first carrier-to-noise ratio and N number of second load Make an uproar and compare, for determining whether the antijamming capability of GPS of the equipment under test is qualified.
- 2. the detecting system of interference free performance according to claim 1, it is characterised in that the switch arrays include：Signal Input interface, interference signal input interface, detection interface and middle converting interface；The signal input interface, the interference signal input interface are connected with detection interface by the middle converting interface, wherein, The signal input interface is connected with the delivery outlet of the signal source, and the interference signal input interface is defeated with the interference source Outlet connection, the detection interface are connected with the equipment under test.
- 3. the detecting system of interference free performance according to claim 1 or 2, it is characterised in that the main frame, be additionally operable to obtain Take N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio that the equipment under test is calculated；According to N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio, determine that the global satellite of the equipment under test is led Whether the antijamming capability of boat system is qualified.
- 4. the detecting system of interference free performance according to claim 3, it is characterised in that the main frame is specifically used for：First carrier-to-noise ratio in the predeterminated frequency set corresponding to each frequency values is calculated respectively to carry with described second Make an uproar than difference, using the difference as the carrier-to-noise ratio changing value corresponding to the predeterminated frequency；Judge whether the carrier-to-noise ratio changing value corresponding to each frequency values in the predeterminated frequency set belongs to preset range It is interior, if, it is determined that the interference free performance of the GPS of the equipment under test is qualified, otherwise, it is determined that described The interference free performance of the GPS of equipment under test is unqualified.
- 5. the detecting system of interference free performance according to claim 4, it is characterised in that the main frame is additionally operable to：Obtain N number of first carrier-to-noise ratio for being calculated of the equipment under test for being inputted by inputting interface and it is N number of described in Second carrier-to-noise ratio, orReceive N number of first carrier-to-noise ratio and N number of second carrier-to-noise ratio that the equipment under test is sent.
- 6. according to the detecting system of the interference free performance described in claim 5, it is characterised in that the main frame is additionally operable to：Each line loss value in the first line loss set determines that the signal source generates the first detection signal each time Intensity, and control the signal source to generate the first detection signal according to the intensity of the first detection signal of determination.
- 7. the detecting system of interference free performance according to claim 6, it is characterised in that the first line loss set is：It is connected in the frequency spectrograph with the detection interface of the switch arrays, the signal input interface and the interference source Delivery outlet connects, and in the case that the interference signal input interface carries out anti-tampering processing, the interference source is successively according to described The line loss value that the signal of each frequency values generation transmits between frequency spectrograph and the signal input interface in predeterminated frequency set Set.
- 8. the detecting system of interference free performance according to claim 7, it is characterised in that the main frame and the interference source Connection, for controlling the interference source generation interference signal.
- 9. the detecting system of interference free performance according to claim 8, it is characterised in that the main frame is additionally operable to：Each line loss value in the second line loss set determines that the interference source generates the strong of the interference signal each time Degree, and control the interference source to generate the interference signal according to the intensity of the interference signal of determination.
- 10. the detecting system of interference free performance according to claim 9, it is characterised in that the second line loss collection is combined into：It is connected in the frequency spectrograph with the detection interface of the switch arrays, the signal input interface and the signal source Delivery outlet is connected, and in the case of the delivery outlet connection of the interference signal input interface and interference source, the interference source is pressed successively Passed according to the signal of each frequency values generation in the predeterminated frequency set between frequency spectrograph and the interference signal input interface The set of defeated line loss value.
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