CN106953677A - A kind of repeater - Google Patents
A kind of repeater Download PDFInfo
- Publication number
- CN106953677A CN106953677A CN201710161020.0A CN201710161020A CN106953677A CN 106953677 A CN106953677 A CN 106953677A CN 201710161020 A CN201710161020 A CN 201710161020A CN 106953677 A CN106953677 A CN 106953677A
- Authority
- CN
- China
- Prior art keywords
- signal
- repeater
- upward
- power
- lna
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/2931—Signal power control using AGC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15535—Control of relay amplifier gain
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radio Relay Systems (AREA)
Abstract
The present invention is applied to the communications field there is provided a kind of repeater, including：Controller, first LNA, next stage emission and reception module, upward signal processor, combiner, this grade of emission and reception module, high power power amplifier and the second LNA, controller obtains the first output power signal of the first LNA and the secondary signal power output of upward signal processor, and power adjustment is carried out to the upward signal of the first LNA and upward signal processor according to the first output power signal and secondary signal power output respectively, the overall noise factor and power output of direct end uplink signal chains is met to require, simultaneously, second LNA is set between combiner and emission and reception module, second LNA carries out low noise amplification according to the power of the first downstream signal to the 3rd upward signal, so that the first downstream signal and the 3rd upward signal power-balance, so as to realize the noise of reduction upward signal superposition, the covered ground of base station high-quality signal can be realized again.
Description
Technical field
The invention belongs to the communications field, more particularly to a kind of repeater.
Background technology
In current wireless system, general large-scale enterprises and institutions, government department, public security system can all build large-scale
Professional radio communication talkback system, with the development of social economy, the expansion of city and enterprise, RF resources will
It is more and more nervous.The aerogram such as intensive buildings or structures, traffic tunnel, basement, building of shielding in city and enterprise
Number blind area is that radio base station can not be covered, therefore builds excessive wireless base station unit and be not only and excessive take radio
Frequency resource, and the covering of radio signal can not be completed, it is also to waste on economic input.
It is existing in some cities and enterprise during the radio signal blind area such as intensive building, traffic tunnel, basement
Technology is that supplement covering is carried out to blind area using optical fiber repeater mode, but accesses repeater quantity parallel under single base station
Excessively, uplink signal noise will be superimposed, and the covered ground of base station signal, therefore existing optical fiber repeater are had influence on when serious
The wireless communication coverage requirement of wireless communication system user can not be met.
The content of the invention
The embodiment of the present invention provides a kind of repeater, it is intended to solve the repeater of prior art offer under single base station simultaneously
The repeater quantity of row access is excessive, it is impossible to reduce uplink signal noise, the covered ground of base station signal will be had influence on when serious
The problem of.
The present invention is achieved in that a kind of repeater, including：Controller, the first LNA, next stage transmitting-receiving optical mode
Block, upward signal processor, combiner, this grade of emission and reception module, high power power amplifier and the second LNA；
At the controller, the first output power signal and the upward signal for obtaining first LNA
The secondary signal power output of device is managed, and the first control signal is generated and according to second according to first output power signal
Output power signal generates the second control signal；
First LNA, for receiving first control signal and remote to this level according to first control signal
The first upward signal that terminal is received carries out low noise amplification, and the first upward signal carried out after low noise amplification is sent to
The combiner；
The next stage emission and reception module, the optical signal for next stage remote termination to be sent is converted to the second up letter
Number；
The upward signal processor, for receiving the first control signal and according to first control signal to described the
Two upward signals are handled, and the second upward signal after the processing is sent into the combiner；
The combiner, for the second up letter to the first upward signal after low noise amplification and after handling
Number merge, to obtain the 3rd upward signal and the 3rd upward signal is sent into second LNA；
Described level emission and reception module, is connected with upper level repeater, for the optical signal for sending upper level repeater
Be converted to the first downstream signal；
Second LNA, enters for the power output according to first downstream signal to the 3rd upward signal
Row low noise amplification, and the 3rd upward signal after low noise amplification is sent to described level emission and reception module.
Repeater provided in an embodiment of the present invention, by controller obtain the first LNA the first output power signal with
And the secondary signal power output of upward signal processor, and according to the first output power signal and secondary signal power output
Power adjustment is carried out to the upward signal of the first LNA and upward signal processor respectively, makes the total of direct end uplink signal chains
Noise coefficient and power output, which are met, to be required, meanwhile, the second LNA is set between combiner and emission and reception module, the
Two LNAs carry out low noise amplification according to the power of the first downstream signal to the 3rd upward signal so that the first downstream signal with
3rd upward signal power-balance, so as to realize the noise of reduction upward signal superposition, can realize that base station is high-quality again
The covered ground of signal.
Brief description of the drawings
Fig. 1 is the implementation environment figure of repeater work provided in an embodiment of the present invention；
Fig. 2 is repeater structure chart provided in an embodiment of the present invention；
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Repeater provided in an embodiment of the present invention, by controller obtain the first LNA the first output power signal with
And the secondary signal power output of upward signal processor, and according to the first output power signal and secondary signal power output
Power adjustment is carried out to the upward signal of the first LNA and upward signal processor respectively, makes the total of direct end uplink signal chains
Noise coefficient and power output, which are met, to be required, while the second LNA is set between combiner and emission and reception module, the
Two LNAs carry out low noise amplification according to the first downstream signal power to the 3rd upward signal so that the first downstream signal and the
Three upward signal power-balances, so as to realize the noise of reduction upward signal superposition, can realize the high-quality letter in base station again
Number covered ground.
Embodiment：
Fig. 1 shows the implementation environment figure of repeater work provided in an embodiment of the present invention, and the straight of the embodiment of the present invention is put
Station is primarily adapted for use in cascade mode, and cascade mode includes chain type cascade, star-like cascade and three kinds of modes of Mixed cascading, chain type
Cascade mode uses mode of the one-level with one-level, and radio signal is distally extended always, it is adaptable to highway, railway,
The blind area covering of a wide range of strip such as oil field, star-like cascade is to join two grades of remote terminations of more than 2 in one-level remote termination department level,
Suitable for the blind area covering in the landform or buildings or structures of star-shaped arrangement, Mixed cascading pattern is exactly by chain type cascade mode
Be used in combination with star cascading pattern, this pattern design application it is upper more flexibly, be particularly suitable for use in topography and geomorphology and
The coverage holes such as buildings or structures complexity very high city, enterprise.
Exemplified by thinking star-like cascade mode, as shown in figure 1, star-like cascade mode includes base station 1, near-end machine 2, one-level is distally
The 3, the 1st grade of remote termination 4 of machine, the two or two grade of remote termination 5.
In embodiments of the present invention, upward signal is handled by the one or two grade of remote termination 4 and the two or two grade of remote termination 5,
The one-level remote termination 3 of cascade is transmitted a signal to again, and two grades of remote terminations typically set more than 2, it is adaptable to the landform of star-shaped arrangement
Or the blind area covering in buildings or structures, the connection for pattern of being handed in hand by this multiple optical fiber repeaters, per one-level repeater
The upward signal of next stage repeater is handled, made to far below this grade distal end of the uplink signal noise of next stage remote termination
The uplink signal noise of machine, and the upward signal power of next stage remote termination meets the upward signal power requirement of this grade, together
When this grade of remote termination downstream signal carry out coupling processing and balanced to next stage remote termination upward signal, be then fed into next stage
Remote termination, therefore reduction uplink signal noise is realized, and the stable covering of ground signal can be realized.
Fig. 2 shows the structural representation for the repeater that the present invention is provided, and repeater includes：Controller 20, the first low noise
Put 14, next stage emission and reception module 18, upward signal processor 17, combiner 15, this grade of emission and reception module 6, high power power amplifier 7
And second LNA 16.
Details are as follows for the specific course of work, controller 20 obtain the first output power signal of the first LNA 14 with
And after the secondary signal power output of upward signal processor 17, according to the first output power signal generate the first control signal with
And the second control signal is generated according to secondary signal power output, and the first control signal is then sent to the first LNA, will
Second control signal is sent to upward signal processor 17.First LNA 14 receives the first control signal and according to the first control
The first upward signal that signal is received to this grade of remote termination carries out low noise amplification, then will carry out first after low noise amplification
Upward signal is sent to combiner 15, and the optical signal that next stage remote termination is sent is converted to second by next stage emission and reception module 18
Upward signal, second upward signal passes through upward signal processor 17, and upward signal processor 17 receives the second control signal
And the second upward signal is handled according to the second control signal, and the second upward signal after processing is sent to combiner
15, second upward signal of the combiner 15 to the first upward signal after low noise amplification and after handling is merged,
Get the 3rd upward signal of merging, and the 3rd upward signal be sent to the second LNA 16, this grade of emission and reception module 6 with
Upper level repeater is connected, and the optical signal that upper level repeater is sent is converted to the first downstream signal, according to the first descending letter
Number power output, low noise amplification is carried out by 16 pair of the 3rd upward signal of the second LNA, and by after low noise amplification
3rd upward signal is sent to this grade of emission and reception module 6.
In embodiments of the present invention, subordinate's emission and reception module 18 can have multiple, it will be understood that now, a next stage
Emission and reception module one upward signal processor of correspondence and a downstream signal processor.
In embodiments of the invention, the first power output and the second power output can be according to the mathematical modulos in controller
Type is obtained and can also set according to specific requirement.Such as data model in controller 20 according to the first LNA 14 with it is each
The input signal power of individual upward signal processor 17, noise coefficient calculates signal to noise ratio, noise coefficient and input signal power
With under the requirement that noise coefficient chain meets this noise of equipment system, the first LNA 14 is gone out and each by signal-to-noise ratio computation
The optimum output power numerical value of upward signal processor, controller 20 is according to the power output numerical value of the calculating, then passes through interface
Control modules are adjusted.During Practical Project use, overall noise in the processing module noise coefficient chain of this equipment
Coefficient is necessary≤6dB, due to space electromagnetic environment influence, or the input signal caused by factor such as optical cable transmission loss is too small or letter
Make an uproar the situation lower than very, Mathematical Modeling can not adjust the power output of modules by calculating, optical fiber repeater has alarm
Indicate, data are read by the interface of controller 20, the time can be greatlyd save, and realize the reduction of uplink signal noise.
As one embodiment of the present of invention, the repeater also includes high power power amplifier 7, for receiving the first descending letter
Number, and downstream signal is amplified to predetermined power.In certain embodiments, the predetermined power can by RE232 interface settings,
The power of coverage is needed so that downstream signal is amplified into remote termination as needed, so that signal cover is more
Extensively, it is ensured that the covered ground of base station signal.
As one embodiment of the present of invention, the repeater is additionally provided with isolator 8, and isolator 8 connects with high power power amplifier 7
Connect, the transmitting that can eliminate the first downstream signal after high power power amplifier 7 amplifies by isolator 8 is disturbed, and is improved under first
The stability of row signal covered ground, further such that the quality of signal is guaranteed.
As one embodiment of the present of invention, the repeater is additionally provided with coupler 9 and downstream signal processor 19,
High power power amplifier 7, isolator 8 and coupler 9 are sequentially connected on the transmission channel of the first downstream signal, pass through coupler 9
By the first downstream signal coupling cost level downstream signal and next stage downstream signal, and next stage downstream signal is sent to down
Row signal processor 19, is that the upward signal of next stage emission and reception module 18 and the balance of downstream signal power provide basis, makes
The signal for obtaining repeater is more stablized, so as to further increase the stability of ground signal covering.
As one embodiment of the present of invention, the second upward signal is fed back to by downstream signal processor by controller 20
19, downstream signal processor 19 carries out Power Processing to next stage downstream signal so that the second upward signal and next stage are descending
Signal power is balanced, so that the signal of repeater transmission is more stablized, further such that the signal of covered ground is more steady
It is fixed.
As one embodiment of the present of invention, the repeater is additionally provided with descending bandpass filter 10, descending band preferably
Bandpass filter is Multicarity bandpass filter, and descending bandpass filter 10 is connected with coupler 9, passes through descending bandpass filter 10
Receive this grade of downstream signal and processing is filtered to this grade of downstream signal, isolate interference signal, made by filtering process signal
The signal quality that ground must be covered in is higher, further increases the effect of downstream signal covering.
As one embodiment of the present of invention, the repeater is additionally provided with up bandpass filter 13, up band preferably
Bandpass filter 13 is Multicarity bandpass filter, and up bandpass filter 13 connects the first LNA 14 and circulator 12, leads to
Cross up bandpass filter 13 and receive this grade of upward signal, and processing is filtered to this grade of upward signal, to obtain on first
Row signal, make it that the signal quality that repeater is received is higher by filtering process signal, further increases next repeater
Signal quality so that the stability of whole repeater connection system signal is improved.
As one embodiment of the present of invention, the repeater also includes circulator 12, and circulator 12 connects described respectively
Descending bandpass filter 10 and up bandpass filter 13, send described level downstream signal, and pass through day by antenna 11
Line 11 receives this grade of upward signal, and descending bandpass filter 10 receives the first frequency that controller 20 is sent, and according to the first frequency
Rate controls this grade of downstream signal filtering process, and upper every trade bandpass filter 13 receives the second frequency that controller 20 is sent, and root
This grade of upward signal filtering process is controlled according to second frequency, passes through the processing of this grade of signal so that direct discharging station transmits signal
Reduce interference so that the quality of signal is higher, so as to realize that the signal for being covered in ground is strengthened, effect is more preferable.
In one embodiment of the invention, controller 20 can pass through RS232 interfaces and above-mentioned modules such as first
LNA, upward signal processor etc. are communicated, and for example sending the first control to the first LNA by RS232 interfaces believes
Number.
In the embodiment of the present invention, the first output power signal and upward signal of the first LNA are obtained by controller
The secondary signal power output of processor, and according to the first output power signal and secondary signal power output respectively to first
The upward signal of LNA and upward signal processor carries out power adjustment, make the overall noise factor of direct end uplink signal chains with
And power output meets and required, meanwhile, the second LNA, the second LNA root are set between combiner and emission and reception module
Low noise amplification is carried out to the 3rd upward signal according to the power of the first downstream signal so that the first downstream signal and the 3rd up letter
Number power-balance, so as to realize the noise of reduction upward signal superposition, can realize base station high-quality signal on ground again
Stable covering.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, all essences in the present invention
Any modification, equivalent and improvement made within refreshing and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of repeater, it is characterised in that the repeater includes：Controller, the first LNA, next stage transmitting-receiving optical mode
Block, upward signal processor, combiner, this grade of emission and reception module, high power power amplifier and the second LNA；
The controller, the first output power signal and the upward signal processor for obtaining first LNA
Secondary signal power output, and the first control signal and according to secondary signal is generated according to first output power signal
Power output generates the second control signal；
First LNA, for receiving first control signal and according to first control signal to this grade of remote termination
The first upward signal received carries out low noise amplification, and the first upward signal carried out after low noise amplification is sent to described
Combiner；
The next stage emission and reception module, the optical signal for next stage remote termination to be sent is converted to the second upward signal；
The upward signal processor, for receiving the second control signal and according to second control signal to described second
Row signal is handled, and the second upward signal after the processing is sent into the combiner；
The combiner, enters for the second upward signal to the first upward signal after low noise amplification and after handling
Row merges, to obtain the 3rd upward signal and the 3rd upward signal is sent into second LNA；
Described level emission and reception module, is connected with upper level repeater, and the optical signal for upper level repeater to be sent is changed
For the first downstream signal；
Second LNA, is carried out low for the power output according to first downstream signal to the 3rd upward signal
Noise amplifies, and the 3rd upward signal after low noise amplification is sent into described level emission and reception module.
2. repeater as claimed in claim 1, it is characterised in that the repeater also includes：
High power power amplifier, predetermined power is amplified to for receiving first downstream signal, and by the downstream signal.
3. repeater as claimed in claim 1, it is characterised in that the repeater also includes isolator, the isolator with
The high power power amplifier connection, the transmitting interference for eliminating the first downstream signal after the high power power amplifier amplification.
4. repeater as claimed in claim 1, it is characterised in that the repeater also includes at coupler and downstream signal
Manage device, the high power power amplifier, the isolator and the coupler on the transmission channel of first downstream signal according to
Secondary connection, the coupler is used to first downstream signal coupling cost level downstream signal and next stage downstream signal,
And the next stage downstream signal is sent to the downstream signal processor.
5. repeater as claimed in claim 1, it is characterised in that the downstream signal processor is additionally operable to according to described second
Upward signal carries out Power Processing to the next stage downstream signal so that second upward signal and the next stage are descending
Signal power is balanced.
6. repeater as claimed in claim 4, it is characterised in that the repeater also includes descending bandpass filter, described
Downstream filter is connected with the coupler, is carried out for receiving described level downstream signal, and to described level downstream signal
Filtering process, isolates interference signal.
7. repeater as claimed in claim 6, it is characterised in that the repeater also includes up bandpass filter, described
Up bandpass filter connects the first LNA and the circulator, for receiving described level upward signal, and to described
This grade of upward signal is filtered processing, to obtain the first upward signal.
8. repeater as claimed in claim 6, it is characterised in that the repeater also includes circulator, the circulator point
The descending bandpass filter and up bandpass filter are not connected, for sending described level downstream signal by antenna, with
And this grade of upward signal is received by antenna.
9. repeater as claimed in claim 6, it is characterised in that the descending bandpass filter specifically for：
The first frequency that controller is sent is received, and described level downstream signal filtering process is controlled according to the first frequency.
10. repeater as claimed in claim 7, it is characterised in that the up bandpass filter specifically for：
The second frequency that controller is sent is received, and described level upward signal filtering process is controlled according to the second frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710161020.0A CN106953677B (en) | 2017-03-17 | 2017-03-17 | Repeater station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710161020.0A CN106953677B (en) | 2017-03-17 | 2017-03-17 | Repeater station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106953677A true CN106953677A (en) | 2017-07-14 |
| CN106953677B CN106953677B (en) | 2020-08-11 |
Family
ID=59473358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710161020.0A Active CN106953677B (en) | 2017-03-17 | 2017-03-17 | Repeater station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106953677B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110392451A (en) * | 2018-04-18 | 2019-10-29 | 京信通信系统（中国）有限公司 | Base station system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2867728Y (en) * | 2005-12-07 | 2007-02-07 | 北京邦讯技术有限公司 | SCDMA fiber-optical high-frequency-amplification station |
| CN201114046Y (en) * | 2007-08-31 | 2008-09-10 | 京信通信系统（中国）有限公司 | Digital optical fibre repeater station system possessing up link multichannel receiving function |
| CN101399619A (en) * | 2008-10-28 | 2009-04-01 | 深圳市国人射频通信有限公司 | Method, apparatus for repeater bottom noise suppressing, and digital repeater |
| KR20090053176A (en) * | 2007-11-22 | 2009-05-27 | 엘지노텔 주식회사 | Base station and mobile communication system having the same |
| CN201282455Y (en) * | 2008-10-15 | 2009-07-29 | 上海鑫众通信技术有限公司 | Digital fiber-optical discharging-directly machine system |
| CN103067317A (en) * | 2012-12-24 | 2013-04-24 | 京信通信系统（中国）有限公司 | Method, equipment and system used for carrying out noise suppression on upstream signal |
| KR20140031580A (en) * | 2012-09-05 | 2014-03-13 | 주식회사 에이디알에프코리아 | Method and apparatus to reduce uplink noise |
| US20140134943A1 (en) * | 2010-02-16 | 2014-05-15 | Andrew Llc | Gain measurement and monitoring for wireless comunication systems |
| WO2015100596A1 (en) * | 2013-12-31 | 2015-07-09 | 华为技术有限公司 | Method, device and system for suppressing uplink background noise in indoor distributed system |
-
2017
- 2017-03-17 CN CN201710161020.0A patent/CN106953677B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2867728Y (en) * | 2005-12-07 | 2007-02-07 | 北京邦讯技术有限公司 | SCDMA fiber-optical high-frequency-amplification station |
| CN201114046Y (en) * | 2007-08-31 | 2008-09-10 | 京信通信系统（中国）有限公司 | Digital optical fibre repeater station system possessing up link multichannel receiving function |
| KR20090053176A (en) * | 2007-11-22 | 2009-05-27 | 엘지노텔 주식회사 | Base station and mobile communication system having the same |
| CN201282455Y (en) * | 2008-10-15 | 2009-07-29 | 上海鑫众通信技术有限公司 | Digital fiber-optical discharging-directly machine system |
| CN101399619A (en) * | 2008-10-28 | 2009-04-01 | 深圳市国人射频通信有限公司 | Method, apparatus for repeater bottom noise suppressing, and digital repeater |
| US20140134943A1 (en) * | 2010-02-16 | 2014-05-15 | Andrew Llc | Gain measurement and monitoring for wireless comunication systems |
| KR20140031580A (en) * | 2012-09-05 | 2014-03-13 | 주식회사 에이디알에프코리아 | Method and apparatus to reduce uplink noise |
| CN103067317A (en) * | 2012-12-24 | 2013-04-24 | 京信通信系统（中国）有限公司 | Method, equipment and system used for carrying out noise suppression on upstream signal |
| WO2015100596A1 (en) * | 2013-12-31 | 2015-07-09 | 华为技术有限公司 | Method, device and system for suppressing uplink background noise in indoor distributed system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110392451A (en) * | 2018-04-18 | 2019-10-29 | 京信通信系统（中国）有限公司 | Base station system |
| CN110392451B (en) * | 2018-04-18 | 2022-07-12 | 京信网络系统股份有限公司 | Base station system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106953677B (en) | 2020-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102883336B (en) | Intelligent distribution wireless access method, device and system applied to indoor distribution WLAN | |
| CN201523456U (en) | GSM digital frequency-selecting optical fiber repeater with upstream noise suppression function | |
| CN102263595B (en) | Many nets merge Fiber Access System | |
| CN203387508U (en) | Novel multi-network-fusion indoor distribution system | |
| CN106953677A (en) | A kind of repeater | |
| CN102281109A (en) | Multi-system optical transceiver optical fiber access system | |
| CN207677724U (en) | Realize a cable transmission devices of the LTE MIMO in existing room subsystem | |
| CN103078654B (en) | Wireless signal dual-mode antenna system, coupling amplification device and signal processing method | |
| CN202841549U (en) | Communication equipment supporting multiple services and active antenna terminal system | |
| CN203590465U (en) | Indoor and outdoor distribution system of wireless communication signal | |
| CN103647846A (en) | Digital multipoint distribution system and transmission processing method thereof | |
| CN103209026B (en) | A kind of full duplex multi-service fusion light-carried wireless transmission system | |
| CN103139790A (en) | Intelligent wireless access device and network equipment used for indoor wireless local area network | |
| CN201226518Y (en) | Frequency shift companding relay station and relay device | |
| CN201174773Y (en) | Central monitored split type apparatus | |
| CN206775504U (en) | A kind of GSM radio frequency extension apparatus | |
| CN107548074A (en) | A kind of wireless access system, access point and curstomer's site equipment | |
| CN210016465U (en) | Optical fiber relay remote equipment | |
| CN102752056B (en) | Time-division multiplexing electric-branching radio-frequency optical transmission module | |
| CN102448201B (en) | Home gateway system based on fiber radio integration access | |
| CN101388721A (en) | System and method for implementing indoor covering in TD-SCDMA network | |
| CN207354626U (en) | A kind of expansion equipment and system at distribution skin station | |
| CN206922745U (en) | A kind of remote-controlled shortwave duplex communication system | |
| CN101814926B (en) | Signal transmission device and method | |
| CN204733280U (en) | Four road AHD video superimpose transmitters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |