CN107911833A - A kind of air interference test method and system - Google Patents
A kind of air interference test method and system Download PDFInfo
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- CN107911833A CN107911833A CN201711041296.1A CN201711041296A CN107911833A CN 107911833 A CN107911833 A CN 107911833A CN 201711041296 A CN201711041296 A CN 201711041296A CN 107911833 A CN107911833 A CN 107911833A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
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Abstract
The present invention provides a kind of air interference test method and system.The air interference test method, based on the progress HWIL simulation disturbed test under anechoic chamber, environment, the air interference test system comprising transmitter unit, anechoic chamber, receiving unit, jamming equipment is built first, and establishes the communication link in air interference test system between each equipment.When carrying out air interference test, by setting the different parameters of channel simulator in transmitter unit come the real channel of different scenes in simulation test frequency range, solve the problems, such as to need to spend more manpower and time cost in common field testing, drastically increase testing efficiency and validity.And, there is situations such as decay, decline in itself for field testing interference source, the interference signal for reaching disturbed equipment is difficult to quantify, this programme is using the interference source for adding different frequency range by standard antenna in anechoic chamber, effectively shorten the testing time while, improve test accuracy and can degree of reproduction.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of air interference test method and system.
Background technology
At the beginning of 21 century, automotive engineering and radiotechnics show the trend mutually merged, ITS (Intelligent
Transportation System, intelligent transportation system) proposition, realize between vehicle, pedestrian and trackside infrastructure
Information exchange merges.With the popularization of LTE (Long Term Evolution, Long Term Evolution) technology, especially LTE-D2D
(Long-Term Evolution Device-to-Device, a kind of communication service, support LTE cellular systems in equipment and
Communication between equipment) standard formulation so that realizing between car car, bus or train route, car people that direct communication becomes based on LTE technologies can
Can, so as to meet the low time delay between car car, bus or train route, car people, high reliable communication demand.LTE-V2X(Long-Term
Evolution Vehicle-to-Everything, a kind of communication service, includes the sender or reception for supporting car networking application
Just) the core communication network for being ITS, is substantially a kind of wireless communication means end to end in ITS systems, can be with bi-directional
Any possible message, plays the part of the information channel role of core in car networking.V2X is made of three kinds of vehicle communication services, point
It is not：V2V (Vehicle to Vehicle, vehicle and vehicle), V2I (Vehicle to Infrastructure, vehicle with
Roadside unit), V2P (Vehicle to Pedestrian, vehicle and people).International Main Developed Countries and Primary communication standard
Tissue also is unfolded to further investigate to V2X systems.ITU-R(International Telecommunication Union Radio
Communications sector, International Telecommunication Union's radio communication group) it is that the unified research frequency range in the whole world of ITS is true
It is set to 5850MHz-5925MHz, and the U.S., European Union and Singapore's ITS communications bands are consistent with IUT-R.
At this stage, the mainstream wireless communication technique in ITS includes DSRC (Dedicated Short Range
Communication, dedicated short-range communication technology) and LTE-V2X, wherein, DSRC technology has been subjected to the hair of many decades in the U.S.
Exhibition, it is more mature.
The DSRC terminal interference test methods of ITS systems are：Test environment is set as field testing, different by setting
Interference source type and scene, realize the control of the disturbance factor such as coverage, transmission power, bandwidth, modulation system.Not
The communication performance of LTE-V2X systems is tested with conditions of, finally obtains LTE-V2X communication systems in disturbance environment
Fundamental performance parameter, the degree that evaluation LTE-V2X communication systems are disturbed.In addition, the interference of other universal mobile communication terminals
Test method is：Communication link is established in laboratory and the interference source of correlated frequency is set, interference source is set with maximum power
Transmitting, test interference source are disturbed the annoyance level of disturbed terminal eventually through measurement sensitivity difference to evaluate terminal
Degree.
However, DSRC terminal interference tests are set as field testing, variety classes is needed to configure during actual test
With the interference source of quantity disturbed test is realized in various scenes.Wherein, various scenes here include OBU (On Board
Unit, board units) and RSU (Road Side Unit, roadside unit) with friction speed is mobile, LOS (Line Of Sight,
Line-of-sight transmission) and NLOS (Not Line Of Sight, non-line-of-sight transmission) in the case of different signal route of transmission and interference
Source is positioned at the several scenes such as indoor and outdoor, in-car.Due to there are scene substantial amounts and combination complexity, realizing under whole scenes
Test need to spend the testing costs such as substantial amounts of testing time and manpower.It is in addition, existing for universal mobile communication terminal
Disturbed test method in laboratory cannot truly reduce the disturbed test under ITS scenes, not be suitable for the disturbed test of ITS terminals.
Therefore, how to simplify testing process and realize quickly and accurately disturbed test, the technology for becoming urgently to be resolved hurrily is asked
Topic.
The content of the invention
In view of the above problems, it is proposed that the present invention overcomes the above problem in order to provide one kind or solves at least in part
State the air interference test method and system of problem.
One side according to embodiments of the present invention, there is provided a kind of air interference test method, including：
Build the air interference comprising transmitter unit, anechoic chamber, receiving unit, jamming equipment and test system, wherein, institute
Stating transmitter unit includes the first test equipment, transmitting terminal and channel simulator, and the anechoic chamber, includes the first transmitting antenna, connects
Receiving antenna and the second transmitting antenna, the receiving unit includes the second test equipment and receiving terminal；
One end of the transmitting terminal is connected to first test equipment, the other end is connected to the channel simulator
One end；The other end of the channel simulator is accessed to the first transmitting antenna of the anechoic chamber,；By the one of the receiving terminal
End is connected to second test equipment, and the other end is connected to the reception antenna of the anechoic chamber,；The jamming equipment is connected
The second transmitting antenna of the anechoic chamber, is connected to, the jamming equipment is dark by second transmitting antenna access electric wave
Room provides the interference signal of the different channels of disturbance source frequency range；
When carrying out air interference test, by setting the different parameters of the channel simulator come in simulation test frequency range
The real channel of different scenes；
Source test signal, and the current letter in the test frequency range through channel simulator simulation are sent by the transmitting terminal
Road, and then sent by first transmitting antenna, middle test signal is obtained, wherein, described in the first test equipment record
Source test signal and the present channel；
The middle test signal is disturbed to obtain target detection signal through current interference signal, and by the anechoic chamber,
Second transmitting antenna receives, and is sent to the receiving terminal, and be sent to second test equipment；
The source test signal recorded according to first test equipment and the present channel, second test are set
The target detection signal of note and the current interference signal, obtain the communication of the transmitting terminal and the receiving terminal
The system performance parameter of link, and then situation about being disturbed according to the system performance parameter evaluation communication link.
Optionally, the air interference test includes in kind based on half that LTE-V2X terminals are directed under anechoic chamber, environment
Disturbed test is emulated, the transmitting terminal includes LTE-V2X terminals, and the receiving terminal includes LTE-V2X terminals.
Optionally, the transmitting terminal includes OBU board units and/or RSU roadside units, and the receiving terminal includes OBU cars
Carrier unit and/or RSU roadside units.
Optionally, the interference source frequency range includes at least one following：
The working frequency range of FSS fixed satellite service；
The working frequency range of FS fixed services；
The working frequency range of WLAN WLANs.
Optionally, by set the different parameters of the channel simulator come in simulation test frequency range different scenes it is true
Channel, including：
By setting the different parameters of the channel simulator come different logical under different road scenes in simulation test frequency range
The real channel of communication distance, different relative velocities；And/or
Pass through the influence factor for setting the different parameters of the channel simulator to simulate in actual signal transmitting procedure, institute
Stating influence factor includes at least one of path loss, shadow fading, Doppler frequency shift.
Optionally, transmitter unit, receiving unit and the jamming equipment in the air interference test system are positioned at control
In room.
Optionally, the method further includes：
The jamming power rank of interference signal is set；
The jamming equipment is set to send interference signal with set jamming power rank.
Optionally, the system performance parameter includes at least one following：
Packet loss, the bit error rate, transmission rate, signal-to-noise ratio.
Optionally, the method further includes：
In the case where being combined by the jamming equipment with all frequency ranges of the communication link, the system of testing the communication link
Performance, after obtaining the system performance parameter, the channel of the jamming equipment and described logical under selecting system performance worst condition
The channel of letter link is combined as worst channel.
Optionally, the method further includes：
If under different frequency range combination, the system performance testing result of the communication link is identical, then selectes the interference and set
Standby lowest channel and the lowest channel of the communication link is combined as the worst channel.
Optionally, the method further includes：
Under the worst channel combination, the connection of the communication link is kept, the jamming equipment is according to emission maximum
Power, tests the system performance of the communication link, obtains the system performance parameter, and record.
Another aspect according to embodiments of the present invention, additionally provides a kind of air interference test system, including：Transmitting is single
Member, anechoic chamber, receiving unit and jamming equipment；
The transmitter unit includes the first test equipment, transmitting terminal and channel simulator, and the anechoic chamber, includes first
Transmitting antenna, reception antenna and the second transmitting antenna, the receiving unit include the second test equipment and receiving terminal；
One end of the transmitting terminal is connected to first test equipment, and the other end is connected to the one of the channel simulator
End；The other end of the channel simulator accesses the first transmitting antenna of the anechoic chamber,；One end connection of the receiving terminal
To second test equipment, the other end is connected to the reception antenna of the anechoic chamber,；The jamming equipment is connected to described
Second transmitting antenna of anechoic chamber, the jamming equipment access the anechoic chamber, by second transmitting antenna and provide not
With the interference signal of the different channels of interference source frequency range；
When carrying out air interference test, the transmitter unit is by setting the different parameters of the channel simulator come mould
Intend the real channel of different scenes in test frequency range；
Source test signal, and the current letter in the test frequency range through channel simulator simulation are sent by the transmitting terminal
Road, and then sent by first transmitting antenna, middle test signal is obtained, wherein, described in the first test equipment record
Source test signal and the present channel；
The middle test signal is disturbed to obtain target detection signal through current interference signal, and by the anechoic chamber,
Second transmitting antenna receives, and is sent to the receiving terminal, and be sent to second test equipment；
The source test signal recorded according to first test equipment and the present channel, second test are set
The target detection signal of note and the current interference signal, obtain the communication of the transmitting terminal and the receiving terminal
The system performance parameter of link, and then situation about being disturbed according to the system performance parameter evaluation communication link.
Optionally, the air interference test includes in kind based on half that LTE-V2X terminals are directed under anechoic chamber, environment
Disturbed test is emulated, the transmitting terminal includes LTE-V2X terminals, and the receiving terminal includes LTE-V2X terminals.
Optionally, the transmitting terminal includes OBU board units and/or RSU roadside units, and the receiving terminal includes OBU cars
Carrier unit and/or RSU roadside units.
Optionally, the interference source frequency range includes at least one following：
The working frequency range of FSS fixed satellite service；
The working frequency range of FS fixed services；
The working frequency range of WLAN WLANs.
Optionally, the transmitter unit is additionally operable to：
By setting the different parameters of the channel simulator come different logical under different road scenes in simulation test frequency range
The real channel of communication distance, different relative velocities；And/or
Pass through the influence factor for setting the different parameters of the channel simulator to simulate in actual signal transmitting procedure, institute
Stating influence factor includes at least one of path loss, shadow fading, Doppler frequency shift.
Optionally, transmitter unit, receiving unit and the jamming equipment in the air interference test system are positioned at control
In room.
Optionally, the jamming equipment is additionally operable to：
Interference signal is sent according to the jamming power rank of setting.
Optionally, the system performance parameter includes at least one following：
Packet loss, the bit error rate, transmission rate, signal-to-noise ratio.
Optionally, first test equipment or second test equipment are additionally operable to：
In the case where being combined by the jamming equipment with all frequency ranges of the communication link, the system of testing the communication link
Performance, after obtaining the system performance parameter, the channel of the jamming equipment and described logical under selecting system performance worst condition
The channel of letter link is combined as worst channel.
Optionally, first test equipment or second test equipment are additionally operable to：
If under different frequency range combination, the system performance testing result of the communication link is identical, then selectes the interference and set
Standby lowest channel and the lowest channel of the communication link is combined as the worst channel.
Optionally, first test equipment or second test equipment are additionally operable to：
Under the worst channel combination, the connection of the communication link is kept, the jamming equipment is according to emission maximum
Power, tests the system performance of the communication link, obtains the system performance parameter, and record.
The air interference testing scheme that the embodiment of the present invention proposes, based on carrying out HWIL simulation under anechoic chamber, environment
Disturbed test, builds the air interference test system comprising transmitter unit, anechoic chamber, receiving unit, jamming equipment first, and
Establish the communication link between each equipment in air interference test system.When carrying out air interference test, launched by setting
The different parameters of channel simulator carry out the real channel of different scenes in simulation test frequency range in unit, solve common outfield and survey
The problem of needing to spend more manpower and time cost in examination, drastically increase testing efficiency and validity；Secondly, for outer
There is situations such as decay, decline in test interference source, the interference signal for reaching disturbed equipment is difficult to quantitative, and this programme is adopted in itself
The interference source of different frequency range is added by standard antenna in anechoic chamber, while effectively shortening the testing time, improves and surveys
The accuracy of examination and can degree of reproduction.Meanwhile different interference sources is added in the case of there are channel simulator, can be truly anti-
The disturbed condition in actual scene is reflected, solves the problems, such as that existing laboratory disturbed test is difficult to be suitable for ITS systems, it is final real
Now quick, accurate test.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow above and other objects of the present invention, feature and advantage can
Become apparent, below especially exemplified by the embodiment of the present invention.
According to the accompanying drawings will be brighter to the detailed description of the specific embodiment of the invention, those skilled in the art
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole attached drawing, identical component is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 shows the flow chart of air interference test method according to an embodiment of the invention；
Fig. 2 shows the schematic diagram of air interference test system according to an embodiment of the invention；And
Fig. 3 shows that half material object under anechoic chamber, environment according to an embodiment of the invention for LTE-V2X terminals is imitative
The system schematic of true disturbed test.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
In the prior art, ITS terminals outfield disturbed test method, collects Essential Environment data, measure ambient noise first
Level；Measure ITS terminal basic performance indices；Installation jamming equipment simultaneously measures basic performance indices；According to predetermined scheme, not
With in scene, disturbed equipment basic performance in the case of measurement jamming equipment exists；Ultimate analysis measurement data.In addition, laboratory
Disturbed test method is the changing value of disturbed device sensitivity in the case of measurement interference source exists.Specifically, it is determined that test frequency
Section；Jamming equipment is established in the currently connection in test frequency range；Jamming equipment is measured respectively to be under free time and operating mode, by
Disturb the sensitivity of equipment；Its degree being disturbed is evaluated by change of sensitivity amount.
Inventor has found that existing disturbed test technology is substantially insufficient there are following both sides：First, disturb and survey in outfield
In method for testing, different test scenes need to be configured, and in different test scenes, retest is repeated, when expending substantial amounts of
Between, the testing cost such as human and material resources, and test result reproducibility is poor, it is difficult to carries out data analysis.Secondly, testing
In room disturbed test method, it is impossible to reduce true ITS road scenes, test result is difficult to reflect the disturbed of true ITS systems
Situation, while test result lacks reliability and repeatability.
In order to solve the above technical problems, the embodiment of the present invention proposes a kind of air interference test method, Fig. 1 shows basis
The flow chart of the air interference test method of one embodiment of the invention.Referring to Fig. 1, the air interference test method can include with
Lower step S102 to step S106.
Step S102, builds the air interference test system comprising transmitter unit, anechoic chamber, receiving unit, jamming equipment
System, wherein, transmitter unit includes the first test equipment, transmitting terminal and channel simulator, anechoic chamber, including the first transmitting antenna,
Reception antenna and the second transmitting antenna, receiving unit include the second test equipment and receiving terminal.
Step S104, is connected to the first test equipment, the other end is connected to the one of channel simulator by one end of transmitting terminal
End；By the first transmitting antenna of the other end access anechoic chamber, of channel simulator；One end of receiving terminal is connected to the second survey
Equipment is tried, the other end is connected to the reception antenna of anechoic chamber,；Jamming equipment is connected to the second transmitting antenna of anechoic chamber,
Jamming equipment accesses the interference signal of the different channels of anechoic chamber, offer disturbance source frequency range by the second transmitting antenna.
Step S106, when carrying out air interference test, by setting the different parameters of channel simulator come simulation test
The real channel of different scenes in frequency range；Source test signal, and the test frequency range of channel simulator simulation are sent by transmitting terminal
In present channel, and then sent by the first transmitting antenna, obtain middle test signal, wherein, the first test equipment record source
Test signal and present channel；Middle test signal is disturbed to obtain target detection signal through current interference signal, and dark by electric wave
Second transmitting antenna of room receives, and is sent to receiving terminal, and be sent to the second test equipment；Recorded according to the first test equipment
Source test signal and present channel, the target detection signal of the second test equipment record and current interference signal, are launched
End and the system performance parameter of the communication link of receiving terminal, and then the feelings being disturbed according to system performance parameter evaluation communication link
Condition.
The air interference testing scheme that the embodiment of the present invention proposes, based on carrying out HWIL simulation under anechoic chamber, environment
Disturbed test, builds the air interference test system comprising transmitter unit, anechoic chamber, receiving unit, jamming equipment first, and
Establish the communication link between each equipment in air interference test system.When carrying out air interference test, launched by setting
The different parameters of channel simulator carry out the real channel of different scenes in simulation test frequency range in unit, solve common outfield and survey
The problem of needing to spend more manpower and time cost in examination, drastically increase testing efficiency and validity；Secondly, for outer
There is situations such as decay, decline in test interference source, the interference signal for reaching disturbed equipment is difficult to quantitative, and this programme is adopted in itself
The interference source of different frequency range is added by standard antenna in anechoic chamber, while effectively shortening the testing time, improves and surveys
The accuracy of examination and can degree of reproduction.Meanwhile different interference sources is added in the case of there are channel simulator, can be truly anti-
The disturbed condition in actual scene is reflected, solves the problems, such as that existing laboratory disturbed test is difficult to be suitable for ITS systems, it is final real
Now quick, accurate test.
Communication between air interference test system and each equipment of foundation that above step S102 and step S104 are built
Link, it is shown in Figure 2.In fig. 2, air interference test system can include transmitter unit 210, anechoic chamber, 220, receive
Unit 230 and jamming equipment 240, transmitter unit 210 include the first test equipment, transmitting terminal and channel simulator, and electric wave is dark
Room 220 includes the first transmitting antenna (TX antennas), reception antenna (RX antennas) and the second transmitting antenna (TX antennas), receiving unit
230 include the second test equipment and receiving terminal.
Further, one end of transmitting terminal is connected to the first test equipment, and the other end is connected to one end of channel simulator；
First transmitting antenna of the other end access anechoic chamber, 220 of channel simulator；One end of receiving terminal is connected to the second test and sets
Standby, the other end is connected to the reception antenna of anechoic chamber, 220；Jamming equipment 240 is connected to the second transmitting day of anechoic chamber, 220
Line, jamming equipment 240 access the dry of the different channels of the offer disturbance of anechoic chamber, 220 source frequency range by the second transmitting antenna
Disturb signal.
In the alternative embodiment of the present invention, air interference test mentioned above includes being based on anechoic chamber, environment knit stitch
HWIL simulation disturbed test to LTE-V2X terminals, transmitting terminal can include LTE-V2X terminals, and receiving terminal can include
LTE-V2X terminals.Further, transmitting terminal can include OBU board units and/or RSU roadside units, and receiving terminal can include
OBU board units and/or RSU roadside units, not limited to this of the embodiment of the present invention.
As introduced above, the working frequency range of ITS is 5850MHz-5925MHz, therefore the embodiment of the present invention mainly tests FSS
(Fixed Satellite Service, fixed satellite service), FS (Fixed Service, fixed service) and WLAN
(Wireless Local Area Network, WLAN) is to its disturbed condition.Specifically, carried in above step S104
And interference source frequency range can be FSS, FS or WLAN working frequency range, here, the working frequency range of FSS is 5850MHz-
The working frequency range of 6425MHz, FS are 5925MHz-6425MHz, and the working frequency range of WLAN is 5725MHz-5850MHz.
Further, when choosing the different channels of disturbance source frequency range, FSS can choose the channel that bandwidth is 2MHz,
Such as since 5906MHz, every 2MHz as a channel, i.e., (5906MHz, 5908MHz), (5908MHz, 5910MHz),
(5910MHz, 5912MHz), (5912MHz, 5914MHz), (5914MHz, 5916MHz), (5916MHz, 5918MHz),
(5918MHz, 5920MHz), (5920MHz, 5922MHz), (5922MHz, 5924MHz) are, it is necessary to which explanation, illustrates herein
Channel is only exemplary, the embodiment of the present invention is not limited.Similarly, FS can choose the channel that bandwidth is 40MHz,
Such as since 5945MHz, every 40MHz as a channel；WLAN can choose bandwidth be 20MHz channel, such as from
5745MHz starts, every 20MHz as a channel.It is only illustrative, was testing it should be noted that enumerate herein
Cheng Zhong, can choose interference channel according to the actual requirements.
By setting the different parameters of channel simulator come different scenes in simulation test frequency range in above step S106
Real channel, in this scenario, can be by setting channel simulator an embodiment of the present invention provides a kind of optional scheme
Different parameters come in simulation test frequency range different communication distance under different road scenes, the real channel of different relative velocities；
The influence factor that sets the different parameters of channel simulator to simulate in actual signal transmitting procedure, influence here can be passed through
Factor can include path loss, shadow fading, Doppler frequency shift etc.；Can also be by setting the different parameters of channel simulator
Come while different communication distance, different relative velocities and actual signal are transmitted across under different road scenes in simulation test frequency range
Influence factor in journey.For example, the parameter by setting channel simulator, can simulate OBU and RSU with friction speed it is mobile,
The channel of different signal routes of transmission in the case of LOS and NLOS different scenes.
In the alternative embodiment of the present invention, transmitter unit, receiving unit and interference in air interference test system
Equipment can be located at same control room in, can also be located at different control rooms in, for example, by transmitter unit, receiving unit with
And jamming equipment is individually positioned in different control rooms, etc..
In the alternative embodiment of the present invention, the jamming power rank of interference signal can also be set, make jamming equipment with
Set jamming power rank sends interference signal, for example, it is highest level that can set jamming power rank, sets interference
It is standby that interference signal is sent with maximum transmission power.
In above step S106, in the source test signal and present channel recorded according to the first test equipment, the second test
The target detection signal of equipment record and current interference signal, obtain the system performance of the communication link of transmitting terminal and receiving terminal
Parameter, system performance parameter here can include packet loss, the bit error rate, transmission rate, signal-to-noise ratio etc., the invention is not restricted to
This.Further, the embodiment of the present invention is in the case where jamming equipment is combined with all frequency ranges of communication link, the system for testing communication link
Performance, obtains system performance parameter.
In the alternative embodiment of the present invention, in the case where being combined by jamming equipment with all frequency ranges of communication link, test is logical
Believe the system performance of link, after obtaining system performance parameter, the channel of jamming equipment and logical under selecting system performance worst condition
The channel of letter link is combined as worst channel.If under different frequency range combination, the system performance testing result of communication link is identical,
Then select the lowest channel of jamming equipment and the lowest channel of communication link is combined as worst channel.
Further, under the combination of worst channel, the connection of communication link is kept, jamming equipment is according to emission maximum work(
Rate, tests the system performance of communication link, obtains system performance parameter, and record.
A variety of implementations of the links of embodiment illustrated in fig. 1 are described above, specific embodiment will be passed through below
Process is realized the air interference test method of the present invention is discussed in detail.
In a specific embodiment of the present invention, air interference test is that LTE-V2X terminals are directed under anechoic chamber, environment
HWIL simulation disturbed test, transmitting terminal is OBU board units and/or RSU roadside units, and receiving terminal is OBU board units
And/or RSU roadside units.The embodiment of the present invention is using the HWIL simulation that LTE-V2X terminals are directed under anechoic chamber, environment
Disturbed test scheme, concrete scheme include the following steps a) to step h).
Control room is moved to a) disturbed equipment to be carried out to time synchronization outdoors after, disturbed equipment here includes transmitting
End and receiving terminal.
B) the first test equipment, transmitting terminal, the second test equipment and receiving terminal are calibrated, builds air interference survey
Test system simultaneously establishes communication link.
In this step, as shown in figure 3, in the test system, the first test is set the air interference test system built
Standby, transmitting terminal OBU/RSU and channel simulator composition transmitter unit 310, anechoic chamber, 320 include the first transmitting antenna (TX days
Line), reception antenna (RX antennas) and the second transmitting antenna (TX antennas), the second test equipment and receiving terminal OBU/RSU compositions connect
Receive unit 330.WLAN/FSS/FS is interference source, is sent from jamming equipment 340.
Further, one end of transmitting terminal OBU/RSU is connected to the first test equipment, the other end is connected to channel simulation
One end of device；By the first transmitting antenna of the other end access anechoic chamber, 320 of channel simulator；By receiving terminal OBU/RSU's
One end is connected to the second test equipment, and the other end is connected to the reception antenna of anechoic chamber, 320；Jamming equipment 340 is connected to
Second transmitting antenna of anechoic chamber, 320, jamming equipment 340 access anechoic chamber, 320 by the second transmitting antenna and provide difference
The interference signal of the different channels of interference source frequency range.
C) parameter such as the communication mode in LTE-V2X system performance requirements, coverage and car speed, sets letter
The parameters such as the loss of parameter simulation respective paths and decline of road simulator.
In this step, can be by setting the different parameters of channel simulator come different road fields in simulation test frequency range
Different communication distance, the real channel of different relative velocities under scape；Can also by set the different parameters of channel simulator come
Simulate the influence factor in actual signal transmitting procedure, influence factor here can include path loss, shadow fading, how general
Strangle frequency displacement etc.；Can also be by setting the different parameters of channel simulator come under different road scenes in simulation test frequency range at the same time
Influence factor in different communication distance, different relative velocities and actual signal transmitting procedure.For example, by setting channel mould
Intend the parameter of device, OBU and RSU can be simulated and passed with signal different in the case of friction speed movement, LOS and NLOS different scenes
Broadcast the channel of approach.
D) jamming equipment is adjusted to maximum transmission power, launches interference signal in the lowest channel of interference source present frequency range.
Using V2V and V2I communication links as disturbed link, it is tested frequency range and is divided into high and low channel or unique channel.In jamming equipment and
Under disturbed all frequency range combinations of link, the system performance of V2V communication links or V2I communication links is tested.
In this step, source test signal, and the test frequency range of channel simulator simulation are sent by transmitting terminal OBU/RSU
In present channel, and then sent by the first transmitting antenna, obtain middle test signal, wherein, the first test equipment record source
Test signal and present channel；Middle test signal is disturbed to obtain target detection signal through current interference signal, and dark by electric wave
Second transmitting antenna of room 320 receives, and is sent to receiving terminal OBU/RSU, and be sent to the second test equipment；According to the first test
The source test signal and present channel of equipment record, the target detection signal of the second test equipment record and current interference letter
Number, the system performance parameter of the communication link of transmitting terminal OBU/RSU and receiving terminal OBU/RSU is obtained, and then according to system performance
The situation that parameter evaluating communication link is disturbed.
If e) bandwidth of operation of OBU and RSU is 10MHz, respectively in the two low and high channels of currently test frequency range
Test the communication link system basic performance., can be in currently test frequency range if the bandwidth of operation of OBU and RSU is 20MHz
Unique channel test the basic performance of the communication link.
F) jamming equipment launches interference signal in the highest channel of interference source present frequency range with maximum transmission power, repeats to walk
It is rapid e).
G) by the jamming equipment channel under LTE-V2X system performance worst conditions in step d)-step f) and disturbed chain
The channel on road elects worst channel combination as.If it is identical that communication link system test result is disturbed under different situations, select dry
The lowest channel of equipment and the lowest channel of disturbed communication link is disturbed to combine for worst channel.
H) under the worst channel combination, the connection of disturbed communication link is kept, jamming equipment is according to maximum power
Transmitting, tests the basic performance of disturbed communication link, and records result；If disturbed communication link supports multiple scenes,
It should also be tested under several scenes according to step a) to step h).
This programme proposes to set the test side of channel simulator simulating realistic ITS signals route of transmission in anechoic chamber,
Method.As shown in step b), by channel simulator emulation real road propagation characteristic in ITS systems in anechoic chamber, avoid
It is directed to different scenes in actual test, substantial amounts of test job in the case of configuration disturbance source, greatly shortens survey
The examination time, reduce difficulty of test, and makes test job be easy to reappear.
Secondly, this programme launches interference signal by standard antenna addition interference sources in darkroom in different channels,
As shown in step d) and step f), solve outfield disturbed test interference source and be difficult to the difficulty that quantitative and disturbed test is difficult to reappear
Topic, improve test accuracy and can degree of reproduction, it is final to realize quick, accurate test.
It should be noted that in practical application, above-mentioned all optional embodiments can be any group by the way of combining
Close, form the alternative embodiment of the present invention, this is no longer going to repeat them.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of air interference test system, can such as Fig. 2 or
Shown in Fig. 3., can be by transmitter unit 210 by setting channel simulator when carrying out air interference test by taking Fig. 2 as an example
Different parameters carry out the real channel of different scenes in simulation test frequency range.Specifically, transmitter unit 210 can be by setting channel
The different parameters of simulator come in simulation test frequency range different communication distance under different road scenes, different relative velocities it is true
Channel；Can also be by the influence factor that sets the different parameters of channel simulator to simulate in actual signal transmitting procedure, this
In influence factor can include path loss, shadow fading, Doppler frequency shift etc.；Can also be by setting channel simulator
Different parameters come different communication distance, different relative velocities and actual letter under different road scenes in simulation test frequency range at the same time
Influence factor in number transmitting procedure.For example, the parameter by setting channel simulator, can simulate OBU and RSU with not synchronized
Degree is mobile, the channel of signal route of transmission different in the case of LOS and NLOS different scenes.Here it is possible to by transmitter unit 210
In the first test equipment input parameter set the different parameters of channel simulator, can also directly adjust on channel simulator
One or more components set different parameters.
Further, source test signal and present channel, the second test equipment recorded according to the first test equipment records
Target detection signal and current interference signal, obtain the system performance parameter of the communication link of transmitting terminal and receiving terminal, and then
Situation about being disturbed according to system performance parameter evaluation communication link, can be realized by the first test equipment, can also be by second
Test equipment realizes that the embodiment of the present invention is not restricted this.
In the alternative embodiment of the present invention, the first test equipment or the second test equipment are additionally operable to：
In the case where being combined by jamming equipment with all frequency ranges of communication link, the system performance of communication link is tested, is
After performance parameter of uniting, the channel of jamming equipment and the channel of communication link are as worst channel under selecting system performance worst condition
Combination.
In the alternative embodiment of the present invention, the first test equipment or the second test equipment are additionally operable to：
If under different frequency range combination, the system performance testing result of communication link is identical, then selectes the minimum of jamming equipment
The lowest channel of channel and communication link is combined as worst channel.
In the alternative embodiment of the present invention, the first test equipment or the second test equipment are additionally operable to：
Under the combination of worst channel, the connection of communication link is kept, jamming equipment is according to maximum transmission power, test communication
The system performance of link, obtains system performance parameter, and records.
According to the combination of any one above-mentioned alternative embodiment or multiple alternative embodiments, the embodiment of the present invention can reach
Following beneficial effect：
Disturbed test method and system under the anechoic chamber, of the embodiment of the present invention, it is possible to increase testing efficiency, reduces and survey
Resources costs are tried, overcome in field testing method that time-consuming, the high deficiency of resources costs.Also, LTE-V2X transmitting terminals match somebody with somebody confidence
Road simulator, in the disturbed test of laboratory, simulates actual test scene V2V links and V2I link conditions, improves test result
Accuracy and repeatability, and greatly reduce testing scheme realize difficulty and testing time.Meanwhile match somebody with somebody in anechoic chamber,
Disturbance source is put, greatly lifts testing efficiency, while ensures the accuracy and reproducibility of test using standard antenna.
In the specification that this place provides, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice in the case of these no details.In some instances, known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each inventive aspect,
Above in the description to the exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：I.e. required guarantor
The application claims of shield features more more than the feature being expressly recited in each claim.It is more precisely, such as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following embodiment are expressly incorporated in the embodiment, wherein each claim is in itself
Separate embodiments all as the present invention.
Those skilled in the art, which are appreciated that, to carry out adaptively the module in the equipment in embodiment
Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and attached drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, summary and attached drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
Replace.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included some features rather than further feature, but the combination of the feature of different embodiments means in of the invention
Within the scope of and form different embodiments.For example, in detail in the claims, embodiment claimed it is one of any
Mode it can use in any combination.
The all parts embodiment of the present invention can be with hardware realization, or to be run on one or more processor
Software module realize, or realized with combinations thereof.It will be understood by those of skill in the art that it can use in practice
Microprocessor or digital signal processor (DSP) realize one in air interference test system according to embodiments of the present invention
The some or all functions of a little or whole components.The present invention is also implemented as performing method as described herein
Some or all equipment or program of device (for example, computer program and computer program product).Such realization
The program of the present invention can store on a computer-readable medium, or can have the form of one or more signal.This
The signal of sample can be downloaded from internet website and obtained, and either provided on carrier signal or carried in the form of any other
For.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of some different elements and being come by means of properly programmed computer real
It is existing.In if the unit claim of equipment for drying is listed, several in these devices can be by same hardware branch
To embody.The use of word first, second, and third does not indicate that any order.These words can be explained and run after fame
Claim.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, without departing from the spirit and scope of the present invention, still can according to the present invention disclosure it is direct
Determine or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers other all these variations or modifications.
Claims (22)
- A kind of 1. air interference test method, it is characterised in that including：Build the air interference comprising transmitter unit, anechoic chamber, receiving unit, jamming equipment and test system, wherein, the hair Penetrating unit includes the first test equipment, transmitting terminal and channel simulator, and the anechoic chamber, includes the first transmitting antenna, receives day Line and the second transmitting antenna, the receiving unit include the second test equipment and receiving terminal；One end of the transmitting terminal is connected to first test equipment, the other end is connected to the one of the channel simulator End；The other end of the channel simulator is accessed to the first transmitting antenna of the anechoic chamber,；By one end of the receiving terminal Second test equipment is connected to, the other end is connected to the reception antenna of the anechoic chamber,；The jamming equipment is connected To the second transmitting antenna of the anechoic chamber, the jamming equipment accesses the anechoic chamber, by second transmitting antenna The interference signal of the different channels of disturbance source frequency range is provided；When carrying out air interference test, by setting the different parameters of the channel simulator come different in simulation test frequency range The real channel of scene；Source test signal, and the present channel in the test frequency range through channel simulator simulation are sent by the transmitting terminal, And then sent by first transmitting antenna, middle test signal is obtained, wherein, first test equipment records the source and surveys Trial signal and the present channel；The middle test signal is disturbed to obtain target detection signal through current interference signal, and by the second of the anechoic chamber, Transmitting antenna receives, and is sent to the receiving terminal, and be sent to second test equipment；The source test signal recorded according to first test equipment and the present channel, second test equipment note The target detection signal of record and the current interference signal, obtain the communication link of the transmitting terminal and the receiving terminal System performance parameter, and then the situation that the communication link is disturbed is evaluated according to the system performance parameter.
- 2. air interference test method according to claim 1, it is characterised in that the air interference test includes being based on The HWIL simulation disturbed test of LTE-V2X terminals is directed under anechoic chamber, environment, the transmitting terminal includes LTE-V2X terminals, The receiving terminal includes LTE-V2X terminals.
- 3. air interference test method according to claim 2, it is characterised in that the transmitting terminal includes the vehicle-mounted lists of OBU Member and/or RSU roadside units, the receiving terminal include OBU board units and/or RSU roadside units.
- 4. air interference test method according to claim 2, it is characterised in that the interference source frequency range include it is following extremely It is one of few：The working frequency range of FSS fixed satellite service；The working frequency range of FS fixed services；The working frequency range of WLAN WLANs.
- 5. air interference test method according to claim 2, it is characterised in that by setting the channel simulator Different parameters carry out the real channel of different scenes in simulation test frequency range, including：By set the different parameters of the channel simulator come different communication under different road scene in simulation test frequency range away from From the real channel of, different relative velocity；And/orPass through the influence factor for setting the different parameters of the channel simulator to simulate in actual signal transmitting procedure, the shadow The factor of sound includes at least one of path loss, shadow fading, Doppler frequency shift.
- 6. air interference test method according to claim 1, it is characterised in that in the air interference test system Transmitter unit, receiving unit and jamming equipment are located in control room.
- 7. air interference test method according to claim 1, it is characterised in that further include：The jamming power rank of interference signal is set；The jamming equipment is set to send interference signal with set jamming power rank.
- 8. air interference test method according to claim 1, it is characterised in that the system performance parameter includes following At least one：Packet loss, the bit error rate, transmission rate, signal-to-noise ratio.
- 9. air interference test method according to claim 1, it is characterised in that further include：In the case where being combined by the jamming equipment with all frequency ranges of the communication link, the systematicness of the communication link is tested Can, after obtaining the system performance parameter, the channel of the jamming equipment and the communication under selecting system performance worst condition The channel of link is combined as worst channel.
- 10. air interference test method according to claim 9, it is characterised in that further include：If under different frequency range combination, the system performance testing result of the communication link is identical, then selectes the jamming equipment Lowest channel and the lowest channel of the communication link are combined as the worst channel.
- 11. the air interference test method according to claim 9 or 10, it is characterised in that further include：Under the worst channel combination, keep the connection of the communication link, the jamming equipment according to maximum transmission power, The system performance of the communication link is tested, obtains the system performance parameter, and record.
- 12. a kind of air interference tests system, it is characterised in that including：Transmitter unit, anechoic chamber, receiving unit and dry Disturb equipment；The transmitter unit includes the first test equipment, transmitting terminal and channel simulator, and the anechoic chamber, includes the first transmitting Antenna, reception antenna and the second transmitting antenna, the receiving unit include the second test equipment and receiving terminal；One end of the transmitting terminal is connected to first test equipment, and the other end is connected to one end of the channel simulator； The other end of the channel simulator accesses the first transmitting antenna of the anechoic chamber,；One end of the receiving terminal is connected to institute The second test equipment is stated, the other end is connected to the reception antenna of the anechoic chamber,；The jamming equipment is connected to the electric wave Second transmitting antenna in darkroom, the jamming equipment access the anechoic chamber, by second transmitting antenna and provide different dry Disturb the interference signal of the different channels of source frequency range；When carrying out air interference test, the transmitter unit is surveyed by setting the different parameters of the channel simulator to simulate Try the real channel of different scenes in frequency range；Source test signal, and the present channel in the test frequency range through channel simulator simulation are sent by the transmitting terminal, And then sent by first transmitting antenna, middle test signal is obtained, wherein, first test equipment records the source and surveys Trial signal and the present channel；The middle test signal is disturbed to obtain target detection signal through current interference signal, and by the second of the anechoic chamber, Transmitting antenna receives, and is sent to the receiving terminal, and be sent to second test equipment；The source test signal recorded according to first test equipment and the present channel, second test equipment note The target detection signal of record and the current interference signal, obtain the communication link of the transmitting terminal and the receiving terminal System performance parameter, and then the situation that the communication link is disturbed is evaluated according to the system performance parameter.
- 13. air interference according to claim 12 tests system, it is characterised in that the air interference test includes base The HWIL simulation disturbed test of LTE-V2X terminals is directed under anechoic chamber, environment, it is whole that the transmitting terminal includes LTE-V2X End, the receiving terminal include LTE-V2X terminals.
- 14. air interference according to claim 13 tests system, it is characterised in that it is vehicle-mounted that the transmitting terminal includes OBU Unit and/or RSU roadside units, the receiving terminal include OBU board units and/or RSU roadside units.
- 15. air interference according to claim 13 tests system, it is characterised in that the interference source frequency range includes following At least one：The working frequency range of FSS fixed satellite service；The working frequency range of FS fixed services；The working frequency range of WLAN WLANs.
- 16. air interference according to claim 13 tests system, it is characterised in that the transmitter unit is additionally operable to：By set the different parameters of the channel simulator come different communication under different road scene in simulation test frequency range away from From the real channel of, different relative velocity；And/orPass through the influence factor for setting the different parameters of the channel simulator to simulate in actual signal transmitting procedure, the shadow The factor of sound includes at least one of path loss, shadow fading, Doppler frequency shift.
- 17. air interference according to claim 12 tests system, it is characterised in that in the air interference test system Transmitter unit, receiving unit and jamming equipment be located in control room.
- 18. air interference according to claim 12 tests system, it is characterised in that the jamming equipment is additionally operable to：Interference signal is sent according to the jamming power rank of setting.
- 19. air interference according to claim 12 tests system, it is characterised in that under the system performance parameter includes At least one row：Packet loss, the bit error rate, transmission rate, signal-to-noise ratio.
- 20. air interference according to claim 12 tests system, it is characterised in that first test equipment or described Second test equipment is additionally operable to：In the case where being combined by the jamming equipment with all frequency ranges of the communication link, the systematicness of the communication link is tested Can, after obtaining the system performance parameter, the channel of the jamming equipment and the communication under selecting system performance worst condition The channel of link is combined as worst channel.
- 21. air interference according to claim 20 tests system, it is characterised in that first test equipment or described Second test equipment is additionally operable to：If under different frequency range combination, the system performance testing result of the communication link is identical, then selectes the jamming equipment Lowest channel and the lowest channel of the communication link are combined as the worst channel.
- 22. according to claim 20 or 21 air interference test system, it is characterised in that first test equipment or Second test equipment is additionally operable to：Under the worst channel combination, keep the connection of the communication link, the jamming equipment according to maximum transmission power, The system performance of the communication link is tested, obtains the system performance parameter, and record.
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