CN105450284A - Primary and hierarchical combiner for railway communication optical fiber repeater with bidirectional communication function - Google Patents
Primary and hierarchical combiner for railway communication optical fiber repeater with bidirectional communication function Download PDFInfo
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- CN105450284A CN105450284A CN201510981912.6A CN201510981912A CN105450284A CN 105450284 A CN105450284 A CN 105450284A CN 201510981912 A CN201510981912 A CN 201510981912A CN 105450284 A CN105450284 A CN 105450284A
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- mixer
- classification
- power splitter
- optical fiber
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- 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
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
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- 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
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- Computer Networks & Wireless Communication (AREA)
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- Electromagnetism (AREA)
- Optical Communication System (AREA)
Abstract
The invention relates to a primary and hierarchical combiner for a railway communication optical fiber repeater with a bidirectional communication function. The primary and hierarchical combiner comprises a primary combiner, a hierarchical combiner, a first bidirectional communication channel and a second bidirectional communication, the primary combiner comprises a duplexer, and a first primary second power divider and a second primary second power divider, which are connected with the duplexer respectively, the hierarchical combiner comprises a filter and a hierarchical second power divider, which are connected with each other, one end of the first bidirectional communication channel is respectively connected with the first primary second power divider, the second primary second power divider and the hierarchical second power divider, the other end of the first bidirectional communication channel is connected with a remote terminal, one end of the second bidirectional communication channel is respectively connected with the filter and the duplexer, and the other end of the second bidirectional communication channel is connected with a monitoring center. Compared with the prior art, the primary and hierarchical combiner provided by the invention has the advantages of simple and small structure, low cost, simple wiring, etc.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication.
Background technology
Repeater is the relay repeater between base station (BS) and travelling carriage (MS), belongs to frequency multiplying arrangement, refers to a kind of radio transmission transferring equipment playing signal enhancing in wireless communication transmissions process.The basic function of repeater is exactly a radio-frequency signal power enhancer.Repeater can solve the villages and small towns, tourist district, highway etc. that can not receive base station signal, and can solve the quorum sensing inhibitor in large-scale and ultra-large type building, for requiring the higher occasion such as large-scale high-rise region building (group), community.
Railway C3 circuit repeater, as the term suggests, be used in railway communication.Nowadays, railway communication is mostly decimeter wave, and the transmission of railway signal is not often one-way transmission signal, needs downstream transmission signal.A lot of noise can be produced in signals transmission, need filtering.Traditional duplexer has integrated level low, and volume is large, not easily the shortcoming such as installations, and these shortcomings all need improvement.
Summary of the invention
Object of the present invention be exactly provide to overcome defect that above-mentioned prior art exists a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, there is the advantages such as structure is simply small and exquisite, cost is low, wiring is simple.
Object of the present invention can be achieved through the following technical solutions:
A kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, comprise main mixer, classification mixer, first bi-directional communication channels and the second bi-directional communication channels, described main mixer comprises duplexer and connects the first main two power splitter and second main two power splitter of duplexer respectively, described classification mixer comprises mutually filter in succession and classification two power splitter, one end of described first bi-directional communication channels connects the first main two power splitter respectively, second main two power splitter and classification two power splitter, the other end connects remote termination, one end of described second bi-directional communication channels connects filter and duplexer respectively, the other end connects Surveillance center.
Described first main two power splitter, the second main two power splitter and classification two power splitter are SMD two power splitters.
Described duplexer is SMD duplexer.
Described filter is SMD filter.
Described first main two power splitter is two power splitters meeting centre frequency 887MHz, bandwidth 4MHz, decay 8.5dB, described second main two power splitter is two power splitters meeting centre frequency 932MHz, bandwidth 4MHz, decay 8.5dB, and described classification two power splitter is two power splitters meeting centre frequency 887MHz, bandwidth 4MHz, decay 11dB.
Also comprise the status switch for controlling main mixer and classification mixer operating state, described status switch connects main mixer and classification mixer respectively.
Described main mixer, classification mixer, the first bi-directional communication channels and the second bi-directional communication channels are all integrated on circuit board.
Compared with prior art, the present invention has the following advantages:
1) there is main and close road and classification conjunction road function, mixed signal can process according to different center frequency by main mixer and classification mixer respectively, strengthen the receiving sensitivity of base station, make it to strengthen operating efficiency, adapt to the transmission of single communication signal and mixed communication signal, main mixer and classification mixer also have bi-directional communication function simultaneously, simplify communication line, structure is simple, is applicable to as the device in the near-end machine of railway C3 circuit repeater.
2) adopt SMD two power splitters, SMD duplexer and SMD filter, components and parts are less, market obtaining than being easier to, having that structure is simply small and exquisite, stable performance, integrated height and cheap feature, and higher practical value.
3) the first main two power splitter of suitable centre frequency, the second main two power splitter and classification two power splitter is chosen, for the treatment of decimeter wave (superfrequency, UHF) signal of wave band, be specially adapted to railway communication field, and the decay difference of main mixer and classification mixer is greater than 2dB, can ensure works between main mixer and classification mixer is independent of each other, and avoiding, because certain level work occurs abnormal, affects another level.
4) status switch is set, except control main mixer and classification mixer work simultaneously, can also be controlled both as required work alone, namely main mixer is in and often opens operating state, when main mixer breaks down, status switch controls the work of classification mixer, and reliability is strong, and tolerance performance is strong.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
In figure: 1, main mixer, 11, duplexer, the 12, first main two power splitter, the 13, second main two power splitter, 2, classification mixer, 21, filter, 22, classification two power splitter, the 3, first bi-directional communication channels, 4, the second bi-directional communication channels, 5, remote termination, 6, Surveillance center.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented premised on technical solution of the present invention, give detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment one
As shown in Figure 1, a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, comprise main mixer 1, classification mixer 2, first bi-directional communication channels 3 and the second bi-directional communication channels 4, main mixer 1 comprises duplexer 11 and connects the first main two power splitter 12 and the second main two power splitter 13 of duplexer 11 respectively, classification mixer 2 comprises mutually filter 21 in succession and classification two power splitter 22, one end of first bi-directional communication channels 3 connects the first main two power splitter 12 respectively, second main two power splitter 13 and classification two power splitter 22, the other end connects remote termination 5, one end of second bi-directional communication channels 4 connects filter 21 and duplexer 11 respectively, the other end connects Surveillance center 6, this main classification mixer can realize the two-way signaling transmission between remote termination 5 and Surveillance center 6, wherein:
First main two power splitter 12, second main two power splitter 13 and classification two power splitter 22 are SMD two power splitters.
Duplexer 11 is SMD duplexer.
Filter 21 is SMD filter.
Main mixer 1, classification mixer 2, first bi-directional communication channels 3 and the second bi-directional communication channels 4 are all integrated on circuit board.Adopt the main purpose of main mixer 1 and classification mixer 2 to be the receiving sensitivities strengthening base station, make it to strengthen operating efficiency.Work between main mixer 1 and classification mixer 2 and be independent of each other, avoid, because certain level work occurs abnormal, affecting another level.
In the present invention, first main two power splitter 12 is for meeting two power splitters of centre frequency 887MHz, bandwidth 4MHz, decay 8.5dB, second main two power splitter 13 is for meeting two power splitters of centre frequency 932MHz, bandwidth 4MHz, decay 8.5dB, and classification two power splitter 22 is for meeting two power splitters of centre frequency 887MHz, bandwidth 4MHz, decay 11dB.The model of filter 21 is SPR887F4R04FB, and heatproof is effective, and patch size is 13 × 12mm, and centre frequency is 885MHz ~ 889MHz, and insertion loss is 4.5dB; Duplexer 11 is dielectric duplexer 11, model is SRP887F932N10N04FA, patch size is 42 × 17mm, compare great cavity duplexer, installing space can be reduced, centre frequency is 885MHz ~ 889MHz and 930MHz ~ 934MHz, and index meets near-end machine demand completely, and insertion loss is 2dB; Three two power splitters are paster minitype paster two power splitter, and model is SBTC-2-10L+, and be with wide, volume is little, and precision is high.
Because railway communication GMS-R system uplink channel centre frequency is 932MHz, down channel centre frequency is 887MHz, so the design adopts above-mentioned centre frequency, and adopts frequency diversity reception technique.Diversity reception is the character utilizing signal and channel, the multipath signal received is separated into the multipath signal of uncorrelated (independently) mutually, then adjudicate after the energy that multidiameter fading channel disperses more effectively being received process, thus reach anti fading object.
Compared with prior art, components and parts used in the present invention are less, and market obtains than being easier to, and have that structure is simply small and exquisite, stable performance, integrated height and cheap feature, there is higher practical value, be applicable to railway communication field.
Embodiment two
The difference of the present embodiment and embodiment one is, main classification mixer also comprises the status switch for controlling main mixer 1 and classification mixer 2 operating state, status switch connects main mixer 1 and classification mixer 2 respectively, status switch can control main mixer 1 and classification mixer 2 works simultaneously, main mixer 1 can also be controlled and classification mixer 2 works alone, when both control works alone, can according to main mixer 1 whether fault control the operating state of classification mixer 2, namely when main mixer 1 fault, control classification mixer 2 to work, whole mixer still can be worked on.
Claims (7)
1. one kind can the main classification mixer of railway communication optical fiber repeater of two-way communication, it is characterized in that, comprise main mixer (1), classification mixer (2), first bi-directional communication channels (3) and the second bi-directional communication channels (4), described main mixer (1) comprises duplexer (11) and connects the first main two power splitter (12) and second main two power splitter (13) of duplexer (11) respectively, described classification mixer (2) comprises mutually filter (21) in succession and classification two power splitter (22), one end of described first bi-directional communication channels (3) connects the first main two power splitter (12) respectively, second main two power splitter (13) and classification two power splitter (22), the other end connects remote termination (5), one end of described second bi-directional communication channels (4) connects filter (21) and duplexer (11) respectively, the other end connects Surveillance center (6).
2. according to claim 1 a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, it is characterized in that, described first main two power splitter (12), the second main two power splitter (13) and classification two power splitter (22) are SMD two power splitters.
3. according to claim 1 a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, it is characterized in that, described duplexer (11) is SMD duplexer.
4. according to claim 1 a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, it is characterized in that, described filter (21) is SMD filter.
5. according to claim 1 a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, it is characterized in that, described first main two power splitter (12) is for meeting two power splitters of centre frequency 887MHz, bandwidth 4MHz, decay 8.5dB, described second main two power splitter (13) is for meeting two power splitters of centre frequency 932MHz, bandwidth 4MHz, decay 8.5dB, and described classification two power splitter (22) is for meeting two power splitters of centre frequency 887MHz, bandwidth 4MHz, decay 11dB.
6. according to claim 1 a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, it is characterized in that, also comprise the status switch for controlling main mixer (1) and classification mixer (2) operating state, described status switch connects main mixer (1) and classification mixer (2) respectively.
7. according to claim 1 a kind of can the main classification mixer of railway communication optical fiber repeater of two-way communication, it is characterized in that, described main mixer (1), classification mixer (2), the first bi-directional communication channels (3) and the second bi-directional communication channels (4) are all integrated on circuit board.
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| CN201510981912.6A CN105450284B (en) | 2015-12-23 | 2015-12-23 | It is a kind of can two-way communication the main classification combiner of railway communication optical fiber repeater |
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| CN201510981912.6A CN105450284B (en) | 2015-12-23 | 2015-12-23 | It is a kind of can two-way communication the main classification combiner of railway communication optical fiber repeater |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4688260A (en) * | 1985-10-09 | 1987-08-18 | Westinghouse Electric Corp. | High-reliability fiber optic repeater |
| KR20000007806A (en) * | 1998-07-07 | 2000-02-07 | 정용문 | Transmission system in optical switching system and methode thereof |
| CN101729150A (en) * | 2009-11-18 | 2010-06-09 | 耿直 | Transmission treatment method of optical fiber repeater and variable-channel transmission optical fiber repeater |
| CN102624461A (en) * | 2012-04-15 | 2012-08-01 | 耿直 | Two-way transponding working method of optical fiber repeater and two-way transponding optical fiber repeater |
| CN204559569U (en) * | 2015-03-31 | 2015-08-12 | 京信通信技术(广州)有限公司 | Active distributed antenna system and relaying terminal thereof |
| CN205385482U (en) * | 2015-12-23 | 2016-07-13 | 通号通信信息集团上海有限公司 | But both -way communication's railway communication optic fibre repeater is with main combiner in grades |
-
2015
- 2015-12-23 CN CN201510981912.6A patent/CN105450284B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4688260A (en) * | 1985-10-09 | 1987-08-18 | Westinghouse Electric Corp. | High-reliability fiber optic repeater |
| KR20000007806A (en) * | 1998-07-07 | 2000-02-07 | 정용문 | Transmission system in optical switching system and methode thereof |
| CN101729150A (en) * | 2009-11-18 | 2010-06-09 | 耿直 | Transmission treatment method of optical fiber repeater and variable-channel transmission optical fiber repeater |
| CN102624461A (en) * | 2012-04-15 | 2012-08-01 | 耿直 | Two-way transponding working method of optical fiber repeater and two-way transponding optical fiber repeater |
| CN204559569U (en) * | 2015-03-31 | 2015-08-12 | 京信通信技术(广州)有限公司 | Active distributed antenna system and relaying terminal thereof |
| CN205385482U (en) * | 2015-12-23 | 2016-07-13 | 通号通信信息集团上海有限公司 | But both -way communication's railway communication optic fibre repeater is with main combiner in grades |
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