CN203482209U - Mobile communication network interference comprehensive test instrument - Google Patents
Mobile communication network interference comprehensive test instrument Download PDFInfo
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- CN203482209U CN203482209U CN201320156015.8U CN201320156015U CN203482209U CN 203482209 U CN203482209 U CN 203482209U CN 201320156015 U CN201320156015 U CN 201320156015U CN 203482209 U CN203482209 U CN 203482209U
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- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 238000010295 mobile communication Methods 0.000 title claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Abstract
A mobile communication network interference comprehensive test instrument comprises a first duplexer which is connected with an antenna feeder system by an ANT side interface; a second duplexer which is connected with a base station by a BTS side interface; an electric bridge which connects the first duplexer and the second duplexer and comprises a base station test port and an antenna feeder test port. The test instrument can quickly and effectively solve various kinds of interference checking in the working process, so as to reduce the technical difficulty and improve the work efficiency.
Description
Technical Field
The utility model relates to a wireless interference test technique that goes upward of mobile communication network especially relates to mobile communication network interference integrated tester.
Background
Wireless communication networks are becoming more complex, and work related to interference elimination in wireless communication optimization work is also increasing. At present, the interference troubleshooting work needs an engineer with a higher technical level to follow, but the engineer with the higher technical level only depends on a frequency spectrograph and an intermodulation instrument in the interference troubleshooting, and even if the interference type can be judged, the interference source is difficult to accurately judge. Therefore, various interference problems cannot be solved quickly and effectively, and the completion of the work is greatly hindered.
SUMMERY OF THE UTILITY MODEL
Accordingly, it is desirable to provide a mobile communication network interference comprehensive tester capable of eliminating various interferences and improving work efficiency.
A mobile communication network interference comprehensive tester, comprising:
the first duplexer is connected with the antenna feed system through an ANT side interface;
a second duplexer connected to the base station through a BTS-side interface;
a bridge connected between the first duplexer and the second duplexer, the bridge comprising a base station test port and an antenna feed test port.
Implement the utility model discloses, the intermodulation interference that can investigate the antenna feeder system fast and the interference that basic station itself produced save the process, improve work efficiency, satisfy present on-the-spot engineer's urgent need.
In one embodiment, the method further comprises:
one end of the third duplexer is connected with the antenna feed system, and the other end of the third duplexer comprises an RX interface;
the power divider is connected with an RX interface of the third duplexer;
and the multi-frequency point uplink frequency selector is connected with the power divider and comprises a same adjacent frequency interference test port.
By implementing the embodiment, the same and adjacent channel interference can be rapidly checked.
In one embodiment, the method further comprises: a high-power amplifier and a multi-frequency point signal generator; wherein,
the high-power amplifier is connected between the multi-frequency point signal generator and a TX interface of the third duplexer;
the power divider comprises an intermodulation interference test port.
By implementing the embodiment, the reflected intermodulation interference and the intermodulation group effect signal interference of the active equipment can be quickly checked.
In one embodiment, the method comprises the following steps:
a frequency spectrograph connectable to one of the base station test port, the antenna feed test port, the co-adjacent channel interference test port, and the intermodulation interference test port.
By implementing the embodiment, an interference spectrogram can be collected, which is beneficial to detecting the broadband stray interference problem.
Drawings
FIG. 1 is a schematic diagram of interference rejection of a current base station;
FIG. 2 is a schematic diagram of the bidirectional interference testing assembly of the present invention;
fig. 3 is a schematic diagram of the intermodulation/co-adjacent channel interference test assembly of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram illustrating the interference rejection principle of a current base station.
At present, the interference elimination generally needs to be provided with a plurality of instruments and related devices, a frequency spectrograph, an intermodulation instrument, a frequency-selecting repeater, various devices and connecting feeders, different corresponding test scenes need to be built on site according to the characteristics of different interferences, the difficulty in finding the instruments and accessories is high, the process for site finding is complex, and the requirements on engineering technicians are very high. In this case, 3 passive devices, namely a coupler, a duplexer and a load, are needed, 5 connecting lines are needed, and a plurality of adapters are needed. After the comprehensive tester is adopted, whether the base station has interference can be judged only by adopting the connection method shown in FIG. 2, and all connecting wires are provided, so that the simple and practical effect can be achieved.
Fig. 2 is the schematic diagram of the bidirectional interference testing assembly of the present invention. The utility model provides a pair of mobile communication network interference comprehensive tester, include:
the first duplexer is connected with the antenna feed system through an ANT side interface;
a second duplexer connected to the base station through a BTS-side interface;
a bridge connected between the first duplexer and the second duplexer, the bridge comprising a base station test port and an antenna feed test port.
The utility model discloses an it is two-way interference test subassembly that the comprehensive tester of interference includes at least as shown in fig. 2, and this subassembly has two kinds of effects in disturbing the investigation, is used for examining whether the system has intermodulation interference to produce on one hand, and on the other hand confirms whether basic station itself produces the interference. In engineering application, a BTS side interface is connected with a base station, an ANT side interface is connected with an antenna feeder system, two duplexers separate uplink and downlink signals of the base station, the uplink and downlink signals are divided into three paths after passing through an electric bridge, one path of the uplink and downlink signals reaches the base station or the antenna feeder, the other path of the uplink and downlink signals is connected with interference detection equipment or data acquisition equipment, such as a frequency spectrograph, whether intermodulation interference is generated when the signals of the base station pass through the antenna feeder is tested, and the other path of the uplink and downlink signals passes through a base station interference test port to test.
Use the utility model discloses an interference comprehensive tester accounts for than very high two-way interference signal in can seeking mobile communication network, just can seek external interference after this instrument is equipped with the wave filter again. Therefore, after the comprehensive tester is used, the technical difficulty of interference elimination is greatly reduced, and the working efficiency of the interference elimination is greatly improved.
In one embodiment, in order to test the co-adjacent channel interference, the utility model discloses still include:
one end of the third duplexer is connected with the antenna feed system, and the other end of the third duplexer comprises an RX interface;
the power divider is connected with an RX interface of the third duplexer;
and the multi-frequency point uplink frequency selector is connected with the power divider and comprises a same adjacent frequency interference test port.
Fig. 3 is a schematic diagram of the intermodulation/co-adjacent channel interference test assembly of the present invention. As shown in fig. 3, the method further includes: a high-power amplifier and a multi-frequency point signal generator; wherein,
the high-power amplifier is connected between the multi-frequency point signal generator and a TX interface of the third duplexer;
the power divider comprises an intermodulation interference test port.
The interference comprehensive tester of the utility model can also comprise an intermodulation/co-adjacent channel interference testing component as shown in fig. 3, when testing passive intermodulation and the reflection intermodulation interference of active equipment, a multi-carrier frequency power amplifier outputs a plurality of paths of high-power signals, and a frequency spectrograph is connected to an intermodulation signal testing port to test the reflection intermodulation interference signals and intermodulation group effect signals; if the high-power amplifier is turned off, the same-adjacent-frequency test time frequency spectrograph is connected to the same-adjacent-frequency signal test port, and the received signals are filtered by the frequency selector and then can be used for observing the same-adjacent-frequency interference condition in a complex electromagnetic environment through the frequency spectrograph.
And the uplink low-frequency noise amplifier is connected between the third duplexer RX interface and the power divider. When passive intermodulation and active equipment reflection intermodulation interference are tested, a multi-carrier-frequency power amplifier outputs a plurality of paths of high-power signals, an interference detection device or a data acquisition device is connected to an intermodulation signal test port to test reflection intermodulation interference signals and intermodulation group effect signals, the signals are amplified by an uplink low-frequency noise amplifier and then output to the interference detection device or the data acquisition device, the uplink low-frequency noise amplifier has certain uplink gain and can amplify smaller signals to find smaller interference, or interference can be found when a frequency spectrograph with lower sensitivity is used. If the high-power amplifier is turned off, when the same-adjacent-frequency interference test is carried out, the frequency spectrograph is connected to the same-adjacent-frequency signal test port, the received signals are filtered by the frequency selector and then can be observed in a complex electromagnetic environment through the frequency spectrograph, and if the sensitivity of the frequency spectrograph is poor, the signals can be observed after being amplified through the uplink low-noise amplifier.
Therefore, the utility model relates to a mobile communication network interference integrated tester, disturb two-way test subassembly and intermodulation/with adjacent channel interference test subassembly including the basic station. The base station interference bidirectional testing component comprises an ANT side port, an ANT side duplexer, an electric bridge, a BTS side duplexer, a BTS side interface, a base station interference testing port and an antenna feeder interference testing port; the intermodulation and adjacent channel interference test component comprises a multi-frequency point signal generator, a high-power amplifier, a duplexer, an antenna feeder interface, a power divider, an uplink low-frequency noise amplifier, a multi-frequency point uplink frequency selector, an adjacent channel interference test port and an intermodulation interference test port.
In one of the embodiments, in order to investigate some hidden problems, the utility model discloses a:
a frequency spectrograph connectable to one of the base station test port, the antenna feed test port, the co-adjacent channel interference test port, and the intermodulation interference test port.
The common intermodulation instrument can only read out the size of the intermodulation signal, and the actual interference spectrogram can not be seen. Therefore, part of intermodulation interference signals are small, but the problem of broadband stray interference (commonly called flashover ignition) exists, and the problem that devices and equipment which can cause strong interference to a base station cannot be accurately positioned is solved. The passive devices and the active devices can not be positioned, although the intermodulation interference is small, the actual interference to the base station is small, but the intermodulation group effect exists, and the uplink call quality of the base station is seriously influenced under the weak coverage scene. However, the utility model discloses a comprehensive interference tester cooperation frequency spectrograph can see actual interference spectrogram, discovers these hidden problems very easily.
As shown in fig. 2 or fig. 3, the duplexer includes a first duplexer, a second duplexer, and a third duplexer, and the frequency range of the duplexers is 0.7 to 3 GHz. The interference comprehensive tester has the function of being suitable for all frequency bands used by the frequency division duplex mobile communication system.
The signals transmitted between the antenna feed system and the duplexer comprise 2G/3G/4G wireless communication network signals. The interference comprehensive tester is widely applied to various wireless communication networks.
The power rating of the high power amplifier as shown in fig. 3 is between 10W and 400W. Its role is to meet the current and future development needs.
As shown in fig. 3, the number of frequency points in the multi-frequency-point signal generator or the multi-frequency-point uplink frequency selector is greater than or equal to 2, and the number of frequency points can be set. The method has the advantages that the group intermodulation effect can be tested when the frequency points of the transmitted signals are more, and the intermodulation suppression degree can be tested when the frequency points are set to be 2.
The power adjustment step in the multi-frequency point signal generator shown in fig. 3 is not less than 1dB, and the adjustment range is greater than 10 dB. The method has the advantages that various conditions can be conveniently simulated in actual work when the adjustment step length is small and the adjustment range is large.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A mobile communication network interference comprehensive tester is characterized by comprising:
the first duplexer is connected with the antenna feed system through an ANT side interface;
a second duplexer connected to the base station through a BTS-side interface;
a bridge connected between the first duplexer and the second duplexer, the bridge comprising a base station test port and an antenna feed test port.
2. The mobile communication network interference comprehensive tester of claim 1, further comprising:
one end of the third duplexer is connected with the antenna feed system, and the other end of the third duplexer comprises an RX interface;
the power divider is connected with an RX interface of the third duplexer and comprises an intermodulation interference test port;
and the multi-frequency point uplink frequency selector is connected with the power divider and comprises a same adjacent frequency interference test port.
3. The mobile communication network interference comprehensive tester of claim 2, further comprising: a high-power amplifier and a multi-frequency point signal generator; wherein,
and the high-power amplifier is connected between the multi-frequency point signal generator and a TX interface of the third duplexer.
4. The mobile communication network interference comprehensive tester of claim 2, further comprising:
and the uplink low-frequency noise amplifier is connected between the third duplexer RX interface and the power divider.
5. The mobile communication network interference comprehensive tester according to any one of claims 2 to 4, comprising:
and the frequency spectrograph is connected with one of the base station test port, the antenna feeder test port, the same-adjacent-frequency interference test port and the intermodulation interference test port.
6. The mobile communication network interference comprehensive tester of claim 5, characterized in that:
the frequency range of the duplexer is 0.7-3 GHz.
7. The mobile communication network interference comprehensive tester of claim 5, characterized in that:
the signals transmitted between the antenna feed system and the duplexer comprise 2G/3G/4G wireless communication network signals.
8. The mobile communication network interference comprehensive tester of claim 3, characterized in that:
the rated power of the high-power amplifier is between 10W and 400W.
9. The mobile communication network interference comprehensive tester of claim 3, characterized in that:
the frequency point number in the multi-frequency point signal generator or the multi-frequency point uplink frequency selector is more than or equal to 2, and the frequency point number can be set.
10. The mobile communication network interference comprehensive tester of claim 3 or 8 or 9, characterized in that:
the power adjustment step in the multi-frequency point signal generator is not less than 1dB, and the adjustment range is greater than 10 dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320156015.8U CN203482209U (en) | 2013-03-29 | 2013-03-29 | Mobile communication network interference comprehensive test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320156015.8U CN203482209U (en) | 2013-03-29 | 2013-03-29 | Mobile communication network interference comprehensive test instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203482209U true CN203482209U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320156015.8U Expired - Fee Related CN203482209U (en) | 2013-03-29 | 2013-03-29 | Mobile communication network interference comprehensive test instrument |
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| Country | Link |
|---|---|
| CN (1) | CN203482209U (en) |
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2013
- 2013-03-29 CN CN201320156015.8U patent/CN203482209U/en not_active Expired - Fee Related
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