CN209184820U - RRU automatic scaling system - Google Patents
RRU automatic scaling system Download PDFInfo
- Publication number
- CN209184820U CN209184820U CN201822273075.3U CN201822273075U CN209184820U CN 209184820 U CN209184820 U CN 209184820U CN 201822273075 U CN201822273075 U CN 201822273075U CN 209184820 U CN209184820 U CN 209184820U
- Authority
- CN
- China
- Prior art keywords
- rru
- multichannel
- connect
- frequency spectrograph
- base band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
This application involves a kind of RRU automatic scaling systems, including computer, Base Band Unit BBU, multichannel RRU, multi-channel coupling attenuator and frequency spectrograph configured with calibration software, wherein, computer is connect with Base Band Unit BBU, multichannel RRU and frequency spectrograph respectively；Base Band Unit BBU is connect with multichannel RRU and frequency spectrograph respectively；Multi-channel coupling attenuator is connect with multichannel RRU and frequency spectrograph respectively.Above-mentioned RRU automatic scaling system, the power of each multi-channel output signal of RRU is read by directly external frequency spectrograph, to accurately reflect the power of current channel real output signal, and the power detection module without increasing additional forward signal or feedback signal, the generation of error is avoided, it is hereby achieved that higher accuracy, and implement fairly simple, cost is relatively low, is conducive to produce in batches.
Description
Technical field
This application involves wireless communication technology fields, more particularly to a kind of RRU automatic scaling system.
Background technique
With the continuous development of the communication technology, the type of base station products is more and more, and with their own characteristics.Distributed base station
It is traditional base station to be divided into two parts, a part is baseband processing unit (BaseBand Unit, abbreviation BBU), another portion
Dividing is Remote Radio Unit (Radio RemoteUnit, abbreviation RRU), is attached by optical fiber therebetween.Distributed base
Standing has numerous advantages such as low cost, environmental suitability are strong and engineering construction facilitates, and has obtained in 3G and 4G mobile network wide
General application.
In order to meet the covering power and operation quality requirement of base station, communication system would generally emission maximum function to base station
Rate there are certain requirements.And in actual use, the output power of multichannel RRU will receive difference between channels and extraneous ring
The influence in border and difference.Therefore, it is necessary to carry out power calibration to each channel of RRU downlink, to guarantee each channel output
The accuracy of power.
Currently, descending power calibration generally uses the forward signal power detected value or feedback signal power detection of source signal
Value, therefore, it is necessary to increase additional forward signal power detection module or feedback signal power detection module, to increase whole
The cost of a system, and in practical applications, power detection module causes to be difficult to obtain preferable accurate there are certain error
Degree.
Utility model content
Based on this, it is necessary to need the additional power detection device that increases to lead to calibration error for above-mentioned RRU scaling system
Big technical problem provides a kind of RRU automatic scaling system that can effectively improve calibration precision.
To achieve the goals above, the embodiment of the present application provides a kind of RRU automatic scaling system, and the system comprises match
It is equipped with computer, Base Band Unit BBU, multichannel RRU, multi-channel coupling attenuator and the frequency spectrograph of calibration software, wherein calculate
Machine is connect with Base Band Unit BBU, multichannel RRU and frequency spectrograph respectively；Base Band Unit BBU respectively with multichannel RRU and frequency
Spectrometer connection；Multi-channel coupling attenuator is connect with multichannel RRU and frequency spectrograph respectively.
Multi-channel coupling attenuator has public output mouth and multiple input channels in one of the embodiments,
In, multiple input channels are identical as the number of channels of multichannel RRU, and each channel connects one to one.
Multiple input channels of multi-channel coupling attenuator pass through coaxial cable and multichannel in one of the embodiments,
The output port of RRU connects one to one, and the public output mouth of multi-channel coupling attenuator passes through coaxial cable and frequency spectrograph
Input port connection.
Computer is connected with Base Band Unit BBU, multichannel RRU respectively by serial ports or cable in one of the embodiments,
It connects.
Computer is connect by general purpose interface bus GPIB with frequency spectrograph in one of the embodiments,.
Base Band Unit BBU is connect by line trigger signal and clock cable with frequency spectrograph in one of the embodiments,.
Base Band Unit BBU is connect by optical fiber with multichannel RRU in one of the embodiments,.
The downlink system of multichannel RRU includes that main control module and sequentially connected optical fiber connect in one of the embodiments,
Mouth mold block, FPGA module, digital analog converter, first filter, frequency mixer, variable gain amplifier, second filter, power are put
Big device and third filter, wherein FPGA module is connect by fiber interface module and optical fiber with Base Band Unit BBU, master control
Module is communicated to connect with FPGA module and variable gain amplifier respectively.
Main control module is amplified with FPGA module and variable gain respectively by communication interface in one of the embodiments,
Device communication connection.
Multichannel RRU further includes the clock module and power module connecting with main control module in one of the embodiments,.
Above-mentioned RRU automatic scaling system reads the power of each multi-channel output signal of RRU by directly external frequency spectrograph,
To accurately reflect the power of current channel real output signal, and without increasing additional forward signal or feedback signal
Power detection module, avoid the generation of error, it is hereby achieved that higher accuracy, and implement it is fairly simple,
Cost is relatively low, is conducive to produce in batches.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of RRU automatic scaling system in one embodiment；
Fig. 2 is the schematic diagram of internal structure of RRU downlink system in one embodiment.
Wherein, meaning representated by each drawing reference numeral is respectively as follows:
100, computer；
200, Base Band Unit BBU；
300, multichannel RRU；
400, multi-channel coupling attenuator；
500, frequency spectrograph；
301, fiber interface module；
302, FPGA module；
303, digital analog converter；
304, first filter；
305, frequency mixer；
306, variable gain amplifier；
307, second filter；
308, power amplifier；
309, third filter；
310, main control module；
311, clock module；
312, power module.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
Currently, in descending power calibration, by using the forward signal power detected value or feedback signal function of source signal
Rate detected value specifically includes following two mode: one is by repeatedly obtain source signal forward signal power detected value and
The average value of feedback signal power detection value difference value adjusts analog-digital converter or numerical-control attenuator yield value according to the average value
Method and device will rely on the forward signal of source signal and the difference of feedback signal although calibrating downlink radio frequency may be implemented,
Therefore it needs to increase additional power detection module in practical applications, it is larger so as to cause power detection value error, it is difficult to obtain
Obtain preferable accuracy.
Another kind is the difference by obtaining forward power detected value and target power value, and it is logical to adjust downlink according to the difference
Road gain operates also fairly simple although down going channel gain calibration also may be implemented；But the technology relies on the forward direction of source signal
The difference of signal and echo signal is also required in practical application increase additional power detection module, and forward signal detection is single
There is a certain error for member, to cannot accurately reflect currently practical output signal power.
Based on this, the embodiment of the present application provides a kind of RRU automatic scaling system, which can be applied to multichannel RRU,
As shown in Figure 1, the system includes configured with the calibration computer 100 of software, Base Band Unit BBU200, multichannel RRU 300, more
Channel coupling attenuation device 400 and frequency spectrograph 500, wherein computer 100 respectively with Base Band Unit BBU 200, multichannel RRU
300 and frequency spectrograph 500 connect；Base Band Unit BBU200 is connect with multichannel RRU 300 and frequency spectrograph 500 respectively；Multi-pass
Road coupling attenuation device 400 is connect with multichannel RRU 300 and frequency spectrograph 500 respectively.
Specifically, computer 100 is communicated with Base Band Unit BBU 200, multichannel RRU300 respectively by serial ports or cable
Connection, and connect by general purpose interface bus GPIB (General-Purpose Interface Bus) with frequency spectrograph 500.Base
Tape cell BBU 200 is connect by optical fiber with multichannel RRU 300, and Base Band Unit BBU 200 passes through line trigger signal and clock
Signal wire is connect with frequency spectrograph 500, wherein clock cable adopts 10MHz signal wire.Computer 100 passes through serial ports or cable control
Base Band Unit BBU 200 processed generates base-band digital source signal, including carrier signal and point-frequency signal.Base Band Unit BBU 200 is then
CPRI (Common Public Radio Interface, common public radio are sent to multichannel RRU 300 by optical fiber
Interface) agreement base-band digital source information, for multichannel RRU 300 to the base-band digital source signal of received CPRI agreement into
Row handles and emits.Computer 100 controls power amplifier, the radio frequency in each channel of downlink in multichannel RRU 300 by serial ports or cable
Switch, and the analog- and digital- yield value in each channel is read and write, meanwhile, computer 100 controls frequency spectrograph 500 by GPIB, with
Read the output power of corresponding channel measured on frequency spectrograph 500, and calculate the output power of current carrier signal with it is specified defeated
The difference of power, the difference of the average value of point-frequency signal output power and reference power average value out.Computer 100 can be with root
Corresponding yield value is adjusted according to the numberical range that the resulting difference of above-mentioned calculating is fallen into, to complete to calibrate.
Above-mentioned RRU automatic scaling system reads the power of each multi-channel output signal of RRU by directly external frequency spectrograph,
To accurately reflect the power of current channel real output signal, and without increasing additional forward signal or feedback signal
Power detection module, avoid the generation of error, it is hereby achieved that higher accuracy, and implement it is fairly simple,
Cost is relatively low, is conducive to produce in batches.
In one embodiment, multi-channel coupling attenuator 400 has public output mouth and multiple input channels,
In, multiple input channels are identical as the number of channels of multichannel RRU 300, and each channel connects one to one.Specifically, multi-pass
Multiple input channels of road coupling attenuation device 400 are corresponded by the output port of coaxial cable and multichannel RRU 300 to be connected
It connects, the public output mouth of multi-channel coupling attenuator 400 is connect by coaxial cable with the input port of frequency spectrograph 500.
Specifically, being illustrated by taking 8 channel RRU as an example in the present embodiment, correspondingly, using having 8 tunnel input channels
Coupling attenuation device, the public output mouth of coupling attenuation device then pass through coaxial cable and are connected on frequency spectrograph 500, coupling attenuation device
8 tunnel input channels and the output port of 8 channel RRU connected one to one by coaxial cable, each channel is mutually indepedent, leads to
It crosses when calibration is realized in enabled or timing and is automatically switched between different channels, so as to shorten scaled time, improved more
The calibration efficiency of channel RRU.
In one embodiment, as shown in Fig. 2, the downlink system of above-mentioned multichannel RRU 300 include main control module 310 and
Sequentially connected fiber interface module 301, FPGA (Field-Programmable Gate Array, i.e. field programmable gate
Array) module 302, digital analog converter 303, first filter 304, frequency mixer 305, the filtering of variable gain amplifier 306, second
Device 307, power amplifier 308 and third filter 309, wherein FPGA module 302 passes through fiber interface module 301 and light
Fibre is connect with Base Band Unit BBU 200, and main control module 310 is communicated with FPGA module 302 and variable gain amplifier 306 respectively
Connection.
Specifically, main control module 310 by communication interface respectively with FPGA module and variable gain amplifier communication link
It connects.Specifically, main control module 310 receives the operational order of computer by serial ports or cable, to realize to FPGA module 302
Digital gain value and 306 analog-gain value of variable gain amplifier are written and read.FPGA module 302 passes through interface and can
Variable-gain amplifier 306 is communicated, its yield value is adjusted.Wherein, main control module 310, mainly by CPU, DSP (Digital
Signal Processing, Digital Signal Processing) etc. part constitute, signal and data processing are used for, and to the work shape of RRU
State is controlled, and when descending power is calibrated, can be realized by serial ports or cable to digital gain register (FPGA module 302
It is interior) and analog gain register (i.e. variable gain amplifier 306) read-write operation.When RRU is worked normally, further include and master control
The clock module 311 and power module 312 that module 310 connects.
Fiber interface module 301 is connect by optical fiber with Base Band Unit BBU 200, and Base Band Unit BBU 200 is by generation
Carrier signal and point-frequency signal are issued to fiber interface module 301 by optical fiber；Fiber interface module 301 believes the light received
It number is handled, is transferred to FPGA module 302 after converting optical signals to electric signal；FPGA 302 to the electric signal received into
Row Digital IF Processing, and the control instruction of main control module 310 is combined to adjust digital gain value, to form digital medium-frequency signal.
Digital analog converter 303 then carries out digital-to-analogue conversion to digital medium-frequency signal, and the analog if signal after conversion is transmitted to first
Filter 304.First filter 304 then filters out the interference signals such as the spuious and harmonic wave in analog if signal, and will be through filtering
The intermediate-freuqncy signal of wave processing is transmitted to frequency mixer 305；Frequency mixer 305 is sent out after received intermediate-freuqncy signal is then converted to radiofrequency signal
It send to variable gain amplifier 306, variable gain amplifier 306 then adjusts its simulation in conjunction with the control instruction of main control module 310
Yield value；Later by second filter 307 to the interference signals such as intrinsic, spuious and harmonic wave in the radiofrequency signal after filtering out mixing,
It is amplified by the radiofrequency signal after 308 pairs of power amplifier filtering processings；It is penetrated via third filter 309 to amplified
Frequency signal is filtered, such as filters out spuious and harmonic wave interference signal.In the present embodiment, first filter can use
Intermediate-frequency filter realizes that second filter can realize that third filter can use cavity body filter using bandpass filter
It realizes.
Frequency spectrograph 500 then reads the output power that RRU currently emits signal, and computer 100 reads and measures on frequency spectrograph 500
Current transmitting signal output power, and read-write RRU in each channel analog- and digital- yield value, and calculate work as front bearing
The average value and reference power average value of the difference of the output power of wave signal and rated output power, point-frequency signal output power
Difference, it is automatic to complete so that the numberical range fallen into according to the resulting difference of above-mentioned calculating adjusts corresponding yield value
Calibration.In the present embodiment, FPGA module 302 and multi-channel coupling attenuator 400 (being not shown in Fig. 2) cooperate jointly, with reality
It is enabled now to go the power amplifier in each channel, RF switch, carries out making can control with the on or off to single channel, thus in calibration
Only one channel of synchronization is out, in order to auto-scaling.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to utility model patent range therefore cannot be interpreted as.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the concept of this application, various modifications and improvements can be made, these belong to the application's
Protection scope.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of RRU automatic scaling system, which is characterized in that the system comprises the computers configured with calibration software, base band
Unit B BU, multichannel RRU, multi-channel coupling attenuator and frequency spectrograph, the computer respectively with Base Band Unit BBU, multichannel
RRU and frequency spectrograph connection；The Base Band Unit BBU is connect with multichannel RRU and frequency spectrograph respectively；The multi-channel coupling
Attenuator is connect with multichannel RRU and frequency spectrograph respectively.
2. RRU automatic scaling system according to claim 1, which is characterized in that the multi-channel coupling attenuator has
Public output mouth and multiple input channels, the multiple input channel is identical as the number of channels of multichannel RRU, and each channel
It connects one to one.
3. RRU automatic scaling system according to claim 2, which is characterized in that the multi-channel coupling attenuator it is more
A input channel is connected one to one by the output port of coaxial cable and the multichannel RRU, and the multi-channel coupling declines
The public output mouth for subtracting device is connect by coaxial cable with the input port of the frequency spectrograph.
4. RRU automatic scaling system according to claim 1, which is characterized in that the computer passes through serial ports or cable
It is connect respectively with Base Band Unit BBU and multichannel RRU.
5. RRU automatic scaling system according to claim 1, which is characterized in that the computer is total by general-purpose interface
Line GPIB is connect with frequency spectrograph.
6. RRU automatic scaling system according to claim 1, which is characterized in that the Base Band Unit BBU passes through triggering letter
Number line and clock cable are connect with frequency spectrograph.
7. RRU automatic scaling system according to claim 1, which is characterized in that the Base Band Unit BBU by optical fiber with
Multichannel RRU connection.
8. RRU automatic scaling system according to any one of claims 1 to 7, which is characterized in that the multichannel RRU's
Downlink system include main control module and sequentially connected fiber interface module, FPGA module, digital analog converter, first filter,
Frequency mixer, variable gain amplifier, second filter, power amplifier and third filter, the FPGA module pass through light
Fine interface module and optical fiber are connect with Base Band Unit BBU, the main control module respectively with the FPGA module and variable gain
Amplifier communication connection.
9. RRU automatic scaling system according to claim 8, which is characterized in that the main control module passes through communication interface
It is communicated to connect respectively with the FPGA module and variable gain amplifier.
10. RRU automatic scaling system according to claim 8, which is characterized in that the multichannel RRU further includes and institute
State the clock module and power module of main control module connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822273075.3U CN209184820U (en) | 2018-12-29 | 2018-12-29 | RRU automatic scaling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822273075.3U CN209184820U (en) | 2018-12-29 | 2018-12-29 | RRU automatic scaling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209184820U true CN209184820U (en) | 2019-07-30 |
Family
ID=67378309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822273075.3U Active CN209184820U (en) | 2018-12-29 | 2018-12-29 | RRU automatic scaling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209184820U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212436A (en) * | 2019-12-23 | 2020-05-29 | 京信通信系统（中国）有限公司 | Gain calibration method, device, computer equipment and storage medium |
| CN111245765A (en) * | 2020-01-19 | 2020-06-05 | 西安云维智联科技有限公司 | Wired carrier communication signal adaptive gain tracking and capturing method and device |
-
2018
- 2018-12-29 CN CN201822273075.3U patent/CN209184820U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212436A (en) * | 2019-12-23 | 2020-05-29 | 京信通信系统（中国）有限公司 | Gain calibration method, device, computer equipment and storage medium |
| CN111212436B (en) * | 2019-12-23 | 2023-08-25 | 京信网络系统股份有限公司 | Gain calibration method, device, computer equipment and storage medium |
| CN111245765A (en) * | 2020-01-19 | 2020-06-05 | 西安云维智联科技有限公司 | Wired carrier communication signal adaptive gain tracking and capturing method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202002984U (en) | Multi-frequency-band passive intermodulation test instrument | |
| CN101557601B (en) | Method for detecting standing wave, standing wave detection device and base station | |
| CN201583609U (en) | Portable type passive intermodulation tester | |
| CN209184820U (en) | RRU automatic scaling system | |
| CN110703022B (en) | Complex electromagnetic environment construction system, vehicle electromagnetic anti-interference test system and method | |
| CN202197283U (en) | Communication relay device and standing-wave ratio detecting device of the communication relay device | |
| CN210518334U (en) | Multipath radio frequency optical transmission signal amplitude and phase measuring device | |
| CN107222268B (en) | Power amplifier module intermodulation automatic debugging and testing system and method | |
| CN113890637A (en) | Millimeter wave active antenna OTA test system and method, calibration system and method | |
| KR100268231B1 (en) | An apparatus and method for air interface simulation | |
| CN106571879A (en) | Power detection method and device | |
| CN208272959U (en) | A kind of ultra-high speed sampling processing broad-band receiver | |
| CN110912607A (en) | Multipath radio frequency optical transmission signal amplitude and phase measuring device and measuring and verifying method | |
| CN1983882A (en) | Radio-frequency front, system and method for measuring antenna feedback voltage resident wave ratio | |
| CN109347508A (en) | A kind of mobile terminal and power detecting method | |
| CN108964808B (en) | Radio frequency transceiver chip test system for wireless local area network | |
| CN210867684U (en) | Multi-target real-time remote measuring system | |
| CN112014812A (en) | Phase-controlled gust profile radar calibration system and method | |
| CN205179373U (en) | A intermodulation test system that is used for POI's multifrequency section to stride standard | |
| CN102711240B (en) | Indoor orientation method, collecting method and system | |
| CN102801482B (en) | Device, method and system for dynamic range adjustment for channel simulation system | |
| CN111030760A (en) | Standing wave detection method and device | |
| CN111224723B (en) | Calibration method and system of radio frequency front-end module, electronic equipment and storage medium | |
| CN202374275U (en) | Two-stage-based automatic calibration system for frequency shift repeater | |
| CN108923872A (en) | A kind of repeater passband fluctuation calibration method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200109 Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee after: Jingxin Communication System (China) Co., Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Co-patentee before: Jingxin Communication System (Guangzhou) Co., Ltd. Patentee before: Jingxin Communication System (China) Co., Ltd. Co-patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd. Co-patentee before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee before: Comba Telecom System (China) Ltd. |