CN110505015A - A kind of ROF system - Google Patents
A kind of ROF system Download PDFInfo
- Publication number
- CN110505015A CN110505015A CN201810482166.XA CN201810482166A CN110505015A CN 110505015 A CN110505015 A CN 110505015A CN 201810482166 A CN201810482166 A CN 201810482166A CN 110505015 A CN110505015 A CN 110505015A
- Authority
- CN
- China
- Prior art keywords
- wavelength division
- division multiplexer
- connect
- central station
- photodetector
- 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.)
- Pending
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Classifications
-
- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of ROF systems, including central station and base station, the central station includes the first central station and the second central station, first central station includes signal emission module and the first wavelength division multiplexer, second central station includes the second wavelength division multiplexer, the base station includes photodetector, radio frequency amplifier and antenna, the signal emission module is connect with first wavelength division multiplexer, first wavelength division multiplexer is connect by single mode optical fiber with second wavelength division multiplexer, second wavelength division multiplexer is connect by single mode optical fiber with the photodetector, the photodetector is connect with the radio frequency amplifier, the radio frequency amplifier is connect with the antenna, the antenna communication is connected with user terminal；It is high that this ROF system solves the problems, such as that traditional ROF system is laid with fibre circuit construction cost.
Description
Technical field
The present invention relates to ROF technical fields, and in particular to a kind of ROF system.
Background technique
Wireless communication and broadband connections are the developing direction in communication industry future.Light carrier radio communication (RoF) technology is to answer height
Fast large capacity wireless communication needs, the emerging wireless access skill for combining fiber optic communication and wireless communication to grow up
Art.Traditional ROF system generally comprises central station and base station, and central station is connect by several optical fiber with base station, is laid with optical fiber
Line construction cost is very high, and WDM-PON application is mature in existing fixed fiber optic communication network, while WDM effectively promotes optical fiber
Elaboration ability, construction cost can be saved, enhance the flexibility of ROF system.Therefore optical fiber can be reduced by being badly in need of one kind at present
The ROF system of construction cost.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of ROF system, this ROF in view of the above shortcomings of the prior art
It is high that system solves the problems, such as that traditional ROF system is laid with fibre circuit construction cost.
To realize the above-mentioned technical purpose, the technical scheme adopted by the invention is as follows:
A kind of ROF system, including central station and base station, the central station include the first central station and the second central station, and described the
One central station includes signal emission module and the first wavelength division multiplexer, and second central station includes the second wavelength division multiplexer, institute
Stating base station includes photodetector, radio frequency amplifier and antenna, and the signal emission module and first wavelength division multiplexer connect
It connects, first wavelength division multiplexer is connect by single mode optical fiber with second wavelength division multiplexer, second wavelength division multiplexer
It is connect by single mode optical fiber with the photodetector, the photodetector is connect with the radio frequency amplifier, the radio frequency
Amplifier is connect with the antenna, and the antenna communication is connected with user terminal.
Technical solution as a further improvement of that present invention, the signal emission module include several lasers, modulation
Device and data signal source, the laser and data signal source are connect with the modulator, the modulator and described first
Wavelength division multiplexer connection, the data signal source is for output digit signals and is sent in modulator.
Technical solution as a further improvement of that present invention, the modulator use both arms Mach-Zehnder modulators.
Technical solution as a further improvement of that present invention, the base station are several, and second wavelength division multiplexer is logical
Excessive root single mode optical fiber is connect with the photodetector.
The invention has the benefit that the present invention reduces by the way that ROF system and WDM to be used in combination and is laid with optical fiber cable
Road construction cost enhances the flexibility of ROF system.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
A specific embodiment of the invention is further illustrated below according to Fig. 1:
Referring to Fig. 1, a kind of ROF system, including central station and base station, the central station include the first central station and the second center
It stands, first central station includes signal emission module and the first wavelength division multiplexer, and second central station includes the second wavelength-division
Multiplexer, the base station include photodetector, radio frequency amplifier and antenna, the signal emission module and first wavelength-division
Multiplexer connection, first wavelength division multiplexer are connect by single mode optical fiber with second wavelength division multiplexer, second wave
Division multiplexer is connect by single mode optical fiber with the photodetector in base station, and the photodetector and the radio frequency amplifier connect
It connects, the radio frequency amplifier is connect with the antenna, and the antenna communication is connected with user terminal.
The signal emission module includes several lasers, modulator and data signal source, the laser and data
Signal source is connect with the modulator, and the modulator is connect with first wavelength division multiplexer, and the data signal source is used
In output digit signals and it is sent in modulator.Laser, modulator, data signal source are identical with the quantity of base station.
The modulator uses both arms Mach-Zehnder modulators.
The base station is several, and second wavelength division multiplexer is connected by more single mode optical fibers and the photodetector
It connects.
Transmission process of the present invention are as follows: data signal source can be the digital signal from metropolis network transmission, laser
Modulator is transmitted optical signals to, modulator receives the digital signal of optical signal and data signal source, and each modulator will be modulated
Signal afterwards is sent to the first wavelength division multiplexer, and the first wavelength division multiplexer is sent to the second wavelength-division by a single mode optical fiber and answers
With device, due to the first central station at a distance from the second central station farther out, the second central station is closer with each base station,
The construction of part fiber route can be reduced between one wavelength division multiplexer and the second wavelength division multiplexer, the second wavelength division multiplexer receives
The optical signal of each different wave length is simultaneously decomposed into each road signal by the optical signal of the first wavelength division multiplexer transmission, passes through more single modes
Each road signal of optical fiber output is to the photodetector in each roadbed station.Photodetector converts optical signals to electric signal and successively
User terminal is sent signal to by radio frequency amplifier and antenna.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims
Subject to, replacement, deformation, the improvement that those skilled in the art that any pair of this technology is made is readily apparent that each fall within of the invention
Protection scope.
Claims (4)
1. a kind of ROF system, including central station and base station, it is characterised in that: the central station includes the first central station and second
Central station, first central station include signal emission module and the first wavelength division multiplexer, and second central station includes second
Wavelength division multiplexer, the base station include photodetector, radio frequency amplifier and antenna, the signal emission module and described first
Wavelength division multiplexer connection, first wavelength division multiplexer are connect by single mode optical fiber with second wavelength division multiplexer, and described the
Two wavelength division multiplexers are connect by single mode optical fiber with the photodetector, and the photodetector and the radio frequency amplifier connect
It connects, the radio frequency amplifier is connect with the antenna, and the antenna communication is connected with user terminal.
2. ROF system according to claim 1, it is characterised in that: the signal emission module include several lasers,
Modulator and data signal source, the laser and data signal source are connect with the modulator, the modulator with it is described
The connection of first wavelength division multiplexer, the data signal source is for output digit signals and is sent in modulator.
3. ROF system according to claim 2, it is characterised in that: the modulator is modulated using both arms Mach-Zehnder
Device.
4. ROF system according to claim 1, it is characterised in that: the base station be several, second wavelength-division multiplex
Device is connect by more single mode optical fibers with the photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810482166.XA CN110505015A (en) | 2018-05-18 | 2018-05-18 | A kind of ROF system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810482166.XA CN110505015A (en) | 2018-05-18 | 2018-05-18 | A kind of ROF system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110505015A true CN110505015A (en) | 2019-11-26 |
Family
ID=68583988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810482166.XA Pending CN110505015A (en) | 2018-05-18 | 2018-05-18 | A kind of ROF system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110505015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957580A (en) * | 2019-12-18 | 2020-04-03 | 中国计量科学研究院 | Directional optical feed antenna and directional optical feed antenna system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452596A (en) * | 2016-10-26 | 2017-02-22 | 国网河南省电力公司信息通信公司 | A WDM-RoF system |
-
2018
- 2018-05-18 CN CN201810482166.XA patent/CN110505015A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452596A (en) * | 2016-10-26 | 2017-02-22 | 国网河南省电力公司信息通信公司 | A WDM-RoF system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957580A (en) * | 2019-12-18 | 2020-04-03 | 中国计量科学研究院 | Directional optical feed antenna and directional optical feed antenna system |
| CN110957580B (en) * | 2019-12-18 | 2021-10-29 | 中国计量科学研究院 | Directional optical feed antenna and directional optical feed antenna system |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191126 |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191126 |
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| RJ01 | Rejection of invention patent application after publication |