CN109861771A - Rail traffic LTE wireless communication system adjacent-channel interference power device and test method - Google Patents
Rail traffic LTE wireless communication system adjacent-channel interference power device and test method Download PDFInfo
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Abstract
The invention discloses a kind of rail traffic LTE wireless communication system adjacent-channel interference power device and test methods, and wherein device includes power module, adjustment module, radio-frequency module；Power module is that adjustment module and radio-frequency module are powered, and adjustment module is set as radio-frequency module adjustment parameter；Radio-frequency module is set as generating signal and be adjusted.A kind of rail traffic LTE wireless communication system adjacent-channel interference power device of the invention and test method, train antenna can be placed on and nearby generate interference signal same as adjacent frequency base station, detect adjacent-channel interference power ratio of the LTE under interference, also it may be coupled to car antenna port, true adjacent frequency wireless electrical interference can be simulated, adjacent-channel interference power ratio of the LTE under interference is detected.
Description
Technical field
The present invention relates to electronics and the communications field more particularly to rail traffic LTE wireless communication system adjacent-channel interference function
Rate device and test method.
Background technique
According to the requirement of national correlation department, rail traffic new route should be wireless using the TD-LTE of 1785-1805MHz
The data of communication-based train control system (CBTC) between communications system transmission vehicle ground.Due to the adjacent frequency in the frequency range both sides
Other communication system work are distributed to, therefore the reliable transmission in order to guarantee CBTC data, test LTE wireless communication system exist
Adjacent-channel interference power ratio under specific adjacent frequency interference is extremely important.
Adjacent-channel interference power ratio of the existing test LTE wireless communication system under the interference of specific adjacent frequency usually has two
Kind mode: on-the-spot test and laboratory test.
Existing on-the-spot test method is: opening adjacent frequency communication equipment makes its work in maximum power, opens train LTE system
It unites and moves slowly at car body near interference, find maximum interference place, then test LTE adjacent-channel interference power ratio.It is existing
Laboratory testing method be: by signal source dedicated by channel instrument connect train LTE terminal, used by site environment parameter
Wireless radio transmission theoretical calculation fading channel value, and channel instrument is set using the pad value, open signal source dedicated and vehicle-mounted
Then LTE terminal tests LTE system adjacent-channel interference power ratio.
On the one hand adjacent frequency communication equipment is opened in existing on-the-spot test makes its work in maximum power, is on the one hand opening column
Vehicle LTE system simultaneously moves slowly at car body near interference, finds maximum interference place, tests LTE adjacent-channel interference power ratio.It is main
The shortcomings that wanting is that project amount is very big, and is difficult to reproduce worst disturbed condition.
Existing laboratory testing method is: signal source dedicated being connected train LTE terminal by channel instrument, passes through scene
Environmental parameter uses wireless radio transmission theoretical calculation fading channel value, and sets channel instrument using the pad value, opens dedicated letter
Then number source and vehicle-mounted LTE terminal test LTE system adjacent-channel interference power ratio.This method uses all purpose instrument, and requires
Scientific and technical personnel's dedicated calculation channel with electromagnetic field and communication, designs entire testing process, primary disadvantage is that condition requires
Harshness, complicated for operation, heavy workload.
Summary of the invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to be directed to existing on-the-spot test side
Method need running train to ad hoc place and need adjacent frequency interference communication coordinated work the big problem of existing project amount and
For existing laboratory testing method and the scientific and technical personnel that require electromagnetic field and communication specially design entire testing process and deposit
In the big problem of complicated for operation, project amount, a kind of rail traffic LTE wireless communication system adjacent-channel interference power device is provided
And test method, train antenna can be placed on and nearby generate interference signal same as adjacent frequency base station, detect LTE under interference
Adjacent-channel interference power ratio also may be coupled to car antenna port, so that it may simulate true adjacent frequency wireless electrical interference, detect
Adjacent-channel interference power ratio of the LTE under interference.
To achieve the above object, the present invention provides a kind of rail traffic LTE wireless communication system adjacent-channel interference power
Device, including power module, adjustment module, radio-frequency module；Power module is that adjustment module and radio-frequency module are powered, adjustment module
It is set as radio-frequency module adjustment parameter；Radio-frequency module is set as generating signal and be adjusted.
Further, radio-frequency module includes control unit, radio frequency unit, power adjustment unit and antenna element；Control is single
Member receives the information of adjustment module, and issues control information to radio frequency unit and power adjustment unit；Antenna element and power tune
Save unit connection.
Further, antenna element includes antennal interface and antenna, and antenna is set as through antennal interface and power regulation
Unit connection.
Further, control unit includes controller, and radio frequency unit includes radio-frequency signal generator, and power adjustment unit includes function
Rate adjuster.
Further, adjustment module includes adjusting panel, and adjusting panel is set as adjusting multiple parameters.
Further, parameter includes environmental form, interference source type, horizontal distance, vertical height, arrival bearing etc..
Further, power module is set as providing DC power supply.
Another preferred embodiment of the invention is provided using such as above-mentioned rail traffic LTE wireless communication system side channel
The test method of jamming power device, comprising the following steps:
Device is mounted on designated position；
Parameters data are obtained according to the position of installation；
According to the supplemental characteristic of acquisition, the parameter of adjustment module is adjusted；
According to the parameter of adjustment module, radio-frequency module transmitting and adjustment signal.
Further, according to the parameter of adjustment module, radio-frequency module transmitting and adjustment signal, specifically includes the following steps:
Control unit receives the parameter of adjustment module, and issues control information to radio frequency unit and power adjustment unit；
The control signal that radio frequency unit reception control unit issues generates LTE adjacent frequency broadband signal；
The control signal that power adjustment unit reception control unit issues believes the LTE adjacent frequency broadband that radio frequency unit generates
It number is adjusted.
Further, according to the supplemental characteristic of acquisition, the parameter of adjustment module is adjusted, is specifically included:
According to the supplemental characteristic of acquisition, environmental form, interference source type, horizontal distance, vertical height, arrival bearing are adjusted
Etc. parameters.
Technical effect
A kind of rail traffic LTE wireless communication system adjacent-channel interference power device of the invention has interference source and intelligence concurrently
Channel instrument function is tested for rail traffic LTE system adjacent-channel interference power ratio.The device of the invention is placed on train antenna
On neighbouring specific range point, interference signal same as adjacent frequency base station is generated, for neighbour of the on-site test LTE system under interference
Channels interference power ratio.
A kind of rail traffic LTE wireless communication system adjacent-channel interference power device of the invention and test method, without
Train is started, only device need to be placed on to car-mounted terminal nearby, parameter can generate corresponding adjacent frequency signal on regulating device panel
Implement the interference to LTE, greatly simplify operation, saves expense.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is a kind of rail traffic LTE wireless communication system adjacent-channel interference function of a preferred embodiment of the invention
The schematic diagram of rate device.
Fig. 2 is a kind of rail traffic LTE wireless communication system adjacent-channel interference function of a preferred embodiment of the invention
The schematic diagram of rate device test method.
Specific embodiment
As shown in Figure 1, the embodiment of the invention provides a kind of rail traffic LTE wireless communication system adjacent-channel interference power
Device, including power module, adjustment module, radio-frequency module；Power module is that adjustment module and radio-frequency module are powered, adjustment module
It is set as radio-frequency module adjustment parameter；Radio-frequency module is set as generating signal and be adjusted.
Wherein, radio-frequency module includes control unit, radio frequency unit, power adjustment unit and antenna element；Control unit connects
The information of adjustment module is received, and issues control information to radio frequency unit and power adjustment unit；Antenna element and power regulation list
Member connection.Antenna element includes antennal interface and antenna, and antenna is set as connecting by antennal interface with power adjustment unit.Control
Unit processed includes controller, and radio frequency unit includes radio-frequency signal generator, and power adjustment unit includes power governor.Adjustment module packet
Adjusting panel is included, adjusting panel is set as adjusting multiple parameters.Parameter includes environmental form, interference source type, horizontal distance, hangs down
Straight height, arrival bearing etc..Power module is set as providing DC power supply.
A specific example will be lifted below to illustrate that rail traffic LTE wireless communication system adjacent-channel interference power fills
It sets.
A kind of rail traffic LTE wireless communication system adjacent-channel interference power device disclosed by the invention, specifically includes control
Device processed, radio-frequency signal generator, power governor, antennal interface, mating antenna, adjusting panel, power module.Controller, which receives, to be adjusted
The information of panel issues control information by tabling look-up and calculating to radio-frequency signal generator and power governor.Radio-frequency signal generator is controlled
In controller, LTE adjacent frequency broadband signal is generated.Power governor is controlled by controller, to the power of LTE adjacent frequency broadband signal into
Row is adjusted.Antennal interface is for connecting power governor and antenna.Mating antenna is according to different adjacent frequency frequencies and different spokes
Firing angle configuration.In adjusting panel be arranged environmental form, the frequency of interference source, bandwidth, horizontal distance, vertical height, arrival bearing,
The adjusting knobs such as power.DC power supply needed for power module is used to generation device.Wherein, environmental form be labeled as tunnel,
Face, interference source type are labeled as adjacent frequency interference system title, horizontal distance between the train-installed terminal in scene and interference source
Horizontal distance, vertical height are vertical height between the train-installed terminal in scene and interference source, arrival bearing is maximum interference
The angle of moment interference source antenna and car-mounted terminal antenna principal direction.
The interference source data that panel transmits are converted to frequency, bandwidth, modulation methods according to the standard of communication system by controller
The parameters such as formula generate standard interference signal to control radio-frequency signal generator.Controller according to electromagnetic wave space propagation rule,
The data such as environmental form, horizontal distance, vertical height, arrival bearing that panel transmits are converted into channel parameter control power tune
Save device.Power governor generates LTE adjacent frequency broadband signal, is launched radio signal by antennal interface, mating antenna.
A kind of rail traffic LTE wireless communication system adjacent-channel interference power device of the present embodiment is applicable not only to scene
Test is also applied for laboratory test.
A kind of rail traffic LTE wireless communication system adjacent-channel interference power device of the invention has interference source and intelligence concurrently
Channel instrument function is tested for rail traffic LTE system adjacent-channel interference power ratio.The device of the invention is placed on train antenna
On neighbouring specific range point, interference signal same as adjacent frequency base station is generated, for neighbour of the on-site test LTE system under interference
Channels interference power ratio.
Another preferred embodiment of the invention is provided using such as above-mentioned rail traffic LTE wireless communication system side channel
The test method of jamming power device, comprising the following steps:
Device is mounted on designated position；
Parameters data are obtained according to the position of installation；
According to the supplemental characteristic of acquisition, the parameter of adjustment module is adjusted；
According to the parameter of adjustment module, radio-frequency module transmitting and adjustment signal.
Wherein, according to the parameter of adjustment module, radio-frequency module transmitting and adjustment signal, specifically includes the following steps:
Control unit receives the parameter of adjustment module, and issues control information to radio frequency unit and power adjustment unit；
The control signal that radio frequency unit reception control unit issues generates LTE adjacent frequency broadband signal；
The control signal that power adjustment unit reception control unit issues believes the LTE adjacent frequency broadband that radio frequency unit generates
It number is adjusted.
In addition, adjusting the parameter of adjustment module according to the supplemental characteristic of acquisition, specifically including:
According to the supplemental characteristic of acquisition, environmental form, interference source type, horizontal distance, vertical height, arrival bearing are adjusted
Etc. parameters.
It will illustrate that respectively rail traffic LTE wireless communication system adjacent-channel interference power of the present invention fills for two examples below
It sets and the specific implementation process of test method.
Embodiment one
On-the-spot test scheme:
For the adjacent frequency interference for setting up GSM1800M system by ground rail traffic route, if system belongs to China Mobile
2G, then its set of frequency are as follows: uplink/downlink: 1710-1720MHz/1805-1815MHz, wherein to the frequency range 1785- of LTE-M
Interference is downlink 1805-1815MHz caused by 1805MHz.By proceeding as follows, GSM1800M system base-station can detecte
Influence of the interference to rail traffic LTE communication system business information stream:
1, one grade of the environmental form setting in adjusting panel: " ground ".
2, one grade of the interference source type setting in adjusting panel: " China Mobile GSM 1800M ".
8, the interference source frequency information of adjusting panel is received in controller, and is issued to radio-frequency signal generator and power governor
Control information.Radio-frequency signal generator is controlled by controller, generates 1805-1815MHz broadband signal.
9, it is 50m that measurement, which obtains base station distance orbit centre level, and horizontal distance is set as 50 in adjusting panel.
10, it is vertically 20m with the height of orbital plane that measurement, which obtains base station, and vertical height is set as 20 in adjusting panel.
11, it is vertically 20m with the height of orbital plane that measurement, which obtains base station, and vertical height is set as 20 in adjusting panel.
12, in order to test maximum interference, base station arrival bearing is vertical track, and base station arrival bearing is 0 in adjusting panel.
13, the nominal power for assuming China Mobile GSM 1800M Base Transmitter is 46dBm, then power setting in adjusting panel
It is 46.
14, other knobs of adjusting panel are set as default value.
15, rule of the controller according to electromagnetic wave in space propagation, the public affairs being lost previously according to electromagnetic field in spatial
Formula has cured the rudimentary algorithm of fading channel, the data such as power, horizontal distance, vertical height, arrival bearing that panel is transmitted
Be converted to channel parameter control power governor.The interference signal and the base station practical China Mobile GSM1800M that device issues at this time
Downlink signal is identical.
16, device is placed on the gauged distance of 5m near train antenna, mounting omnidirectional antenna, and opening device issues and neighbour
The same interference signal in frequency base station.
17, vehicle-mounted LTE terminal is opened according to the original operating procedure of train LTE-M, loads CBTC transmission services.
18, network monitoring method when according to original LTE-M bearer service detects side channel of the LTE system under interference
Noise power ratio.
Embodiment two
Laboratory test scheme:
For the adjacent frequency interference for setting up GSM1800M system by ground rail traffic route, if system belongs to China Mobile
2G, then its set of frequency are as follows: uplink/downlink: 1710-1720MHz/1805-1815MHz, wherein to the frequency range 1785- of LTE-M
Interference is downlink 1805-1815MHz. caused by 1805MHz
By proceeding as follows, to business information stream when can detecte system base-station interference rail traffic LTE communication
Influence:
1, -15, with embodiment one.
16, device is placed on laboratory, with radio frequency shorting stub and fixed attenuator attachment device and vehicle-mounted LTE terminal, opens
Opening device.
17, vehicle-mounted LTE terminal is opened according to the original operating procedure of train LTE-M, loads CBTC transmission services.
18, network monitoring method when according to original LTE-M bearer service detects side channel of the LTE system under interference
Noise power ratio.
A kind of rail traffic LTE wireless communication system adjacent-channel interference power device disclosed by the invention have interference source with
Intelligent channel instrument function, is tested for rail traffic LTE system adjacent-channel interference power ratio, and device disclosed by the invention is placed on
Train antenna nearby on specific range point, generates interference signal same as adjacent frequency base station, for on-site test LTE system dry
Adjacent-channel interference power ratio under disturbing.Of the invention is placed on laboratory in use, the antenna port of device is connected to LTE vehicle
Antenna port is carried, interference signal same as adjacent frequency base station is generated, for side channel of the laboratory testing LTE system under interference
Noise power ratio.Controller is converted to frequency, bandwidth, modulation methods according to the source data of disturbing that the standard of communication system transmits panel
The parameters such as formula generate standard interference signal to control radio-frequency signal generator.Controller according to electromagnetic wave space propagation rule,
The data such as environmental form, horizontal distance, vertical height, arrival bearing that panel transmits are converted into channel parameter control power tune
Save device.
A kind of rail traffic LTE wireless communication system adjacent-channel interference power device of the invention and test method, without
Train is started, only device need to be placed on to car-mounted terminal nearby, parameter can generate corresponding adjacent frequency signal on regulating device panel
Implement the interference to LTE, greatly simplify operation, saves expense, reduce cost.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (10)
1. rail traffic LTE wireless communication system adjacent-channel interference power device, which is characterized in that including power module, adjust
Module, radio-frequency module；The power module is that the adjustment module and the radio-frequency module are powered, and the adjustment module is set as
The radio-frequency module adjustment parameter；The radio-frequency module is set as generating signal and be adjusted.
2. rail traffic LTE wireless communication system adjacent-channel interference power device as described in claim 1, which is characterized in that
The radio-frequency module includes control unit, radio frequency unit, power adjustment unit and antenna element；Described in described control unit receives
The information of adjustment module, and control information is issued to the radio frequency unit and the power adjustment unit；The antenna element with
The power adjustment unit connection.
3. rail traffic LTE wireless communication system adjacent-channel interference power device as claimed in claim 2, which is characterized in that
The antenna element includes antennal interface and antenna, and the antenna is set as connecting by antennal interface and the power adjustment unit
It connects.
4. rail traffic LTE wireless communication system adjacent-channel interference power device as claimed in claim 3, which is characterized in that
Described control unit includes controller, and the radio frequency unit includes radio-frequency signal generator, and the power adjustment unit includes power tune
Save device.
5. rail traffic LTE wireless communication system adjacent-channel interference power device as described in claim 1, which is characterized in that
The adjustment module includes adjusting panel, and adjusting panel is set as adjusting multiple parameters.
6. rail traffic LTE wireless communication system adjacent-channel interference power device as claimed in claim 5, which is characterized in that
The parameter includes environmental form, interference source type, horizontal distance, vertical height, arrival bearing etc..
7. rail traffic LTE wireless communication system adjacent-channel interference power device as described in claim 1, which is characterized in that
The power module is set as providing DC power supply.
8. using the above-mentioned rail traffic LTE wireless communication system adjacent-channel interference power device as described in claim 1-7
Test method, which comprises the following steps:
Described device is mounted on designated position；
Parameters data are obtained according to the position of installation；
According to the supplemental characteristic of acquisition, the parameter of the adjustment module is adjusted；
According to the parameter of adjustment module, the radio-frequency module transmitting and adjustment signal.
9. the test method of rail traffic LTE wireless communication system adjacent-channel interference power device as claimed in claim 8,
It is characterized in that, according to the parameter of adjustment module, the radio-frequency module transmitting and adjustment signal, specifically includes the following steps:
Control unit receives the parameter of the adjustment module, and issues control to the radio frequency unit and the power adjustment unit
Information；
The radio frequency unit receives the control signal that described control unit issues, and generates LTE adjacent frequency broadband signal；
The power adjustment unit receives the control signal that described control unit issues, and the LTE generated to the radio frequency unit is adjacent
Bandwidth band signal is adjusted.
10. the test method of rail traffic LTE wireless communication system adjacent-channel interference power device as claimed in claim 8,
It is characterized in that, adjusting the parameter of the adjustment module according to the supplemental characteristic of acquisition, specifically including:
According to the supplemental characteristic of acquisition, the ginseng such as environmental form, interference source type, horizontal distance, vertical height, arrival bearing is adjusted
Number.
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| CN113038516A (en) * | 2021-03-26 | 2021-06-25 | 苏州攀登者信息科技有限公司 | Downlink frequency band estimation method applied to high-speed rail system |
| CN113141217A (en) * | 2021-03-10 | 2021-07-20 | 上海大学 | Quick system of patrolling and examining of track traffic multifrequency wireless signal |
| CN114157373A (en) * | 2021-12-06 | 2022-03-08 | 上海中铁通信信号测试有限公司 | Rail transit wireless communication interference test method and device |
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| CN113141217A (en) * | 2021-03-10 | 2021-07-20 | 上海大学 | Quick system of patrolling and examining of track traffic multifrequency wireless signal |
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| Publication number | Publication date |
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| CN109861771B (en) | 2022-01-14 |
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