CN111970062A - Digital processing method for digital optical fiber repeater transmission system - Google Patents
Digital processing method for digital optical fiber repeater transmission system Download PDFInfo
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- CN111970062A CN111970062A CN201910417016.5A CN201910417016A CN111970062A CN 111970062 A CN111970062 A CN 111970062A CN 201910417016 A CN201910417016 A CN 201910417016A CN 111970062 A CN111970062 A CN 111970062A
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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
- H04B10/29—Repeaters
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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
- H04B10/40—Transceivers
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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
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15535—Control of relay amplifier gain
Abstract
A digital processing method of a digital optical fiber repeater transmission system is characterized in that the system comprises a wireless signal splitter, a wireless receiver, a wireless transmitter, a wireless signal adapter, an optical wavelength division hybrid multiplexer, an optical wavelength division hybrid demultiplexer and an optical transmission interface, wherein the wireless signal splitter is connected with the wireless signal adapter through the wireless receiver and the wireless transmitter, the wireless signal adapter is connected with the optical transmission interface through the optical wavelength division hybrid multiplexer and the optical wavelength division hybrid demultiplexer, and the optical transmission interface is connected through an optical fiber; the system can provide wireless communication relay transmission service for various wireless communication system users in special areas and tunnels, meets the requirements of reducing the number of antennas, reducing the number of used optical fibers, reducing the mutual interference among systems, meeting the isolation among systems and the like, can realize long-distance optical transmission relay among optical fiber repeaters when the optical fibers are cascaded with the optical fiber repeaters, and has the characteristic of being suitable for relay transmission of various wireless communication systems.
Description
Technical Field
The invention relates to an optical fiber transmission system, in particular to a digital optical fiber repeater transmission system.
Background
The optical fiber repeater distribution system is an extension of indoor and outdoor coverage of a mobile network in a building, and is an important means for improving the coverage width and depth of the network, absorbing indoor and outdoor telephone traffic and improving the network quality and service quality. Current fiber optic repeater distribution systems typically include a main unit, a plurality of extension units, and a plurality of remote units. However, since the main unit is often connected to multiple sources and multiple extension units at the same time, the traffic load is large. Thus, once the main unit fails, the entire fiber distribution system is inoperable. In addition, in some special areas and tunnels, due to the limitations of antenna installation space limitations, optical fiber quantity and other conditions caused by the positions of the special areas and building limitations, the network planning of each wireless communication system is inconsistent, and the influence of factors such as the base station positions, the optical transmission route lengths, the inconsistent user distribution, mutual interference, the requirement of the isolation between the systems and the like of each system cannot be met by installing all relay equipment in the special areas to meet the relay requirement of each wireless communication system, so that the conventional optical fiber repeater cannot meet the relay communication requirement of each wireless communication system user in the special areas.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the following technical scheme: a digital optical fiber repeater transmission system comprises a wireless signal splitter, a wireless receiver, a wireless transmitter, a wireless signal adapter, an optical wavelength division hybrid multiplexer, an optical wavelength division hybrid demultiplexer and an optical transmission interface, wherein the wireless signal splitter is connected with the wireless signal adapter through the wireless receiver and the wireless transmitter, and the wireless signal adapter is connected with the optical transmission interface through the optical wavelength division hybrid multiplexer and the optical wavelength division hybrid demultiplexer, and is characterized in that the following signal transmission working method is adopted:
s1, processing the output signal of the antenna feed system through a wireless signal splitter, and respectively transmitting the received signals of each frequency band to a corresponding wireless receiver;
s2, transmitting the transmitting signals of each wireless transmitter to an antenna feed system after filtering, duplex isolation and combination processing;
s3, the output signal of each wireless receiver is digitally coded through an analog-to-digital converter, and then the digital code is sent to the optical fiber transmission channel through different channels of the optical wavelength division hybrid multiplexer and the photoelectric converter;
s4, the output signal of one channel of the optical wavelength division mixing demultiplexer is restored by a digital signal restorer, then is combined with the output signal of a certain wireless receiver, and then is digitally coded by an analog-to-digital converter, and then is sent out to the optical fiber transmission channel by the other channel of the optical wavelength division mixing demultiplexer and the photoelectric converter;
and S5, recovering and combining the output signals of the two channels of the optical wavelength division hybrid demultiplexer through a digital-to-analog converter, and then sending out the signals through a certain wireless transmitter.
The wireless signal branching device comprises a power dividing combiner, a system filter, a duplexer, a transmitting signal filter and a receiving signal filter, wherein the power dividing combiner, the system filter and the duplexer are sequentially connected, and the duplexer is respectively connected with the transmitting signal filter and the receiving signal filter.
The wireless signal adapter comprises a plurality of first power dividers, a plurality of second power dividers, a first combiner and a plurality of second combiners, the first power dividers are connected with the plurality of second combiners, the plurality of second combiners are connected with the optical wavelength division hybrid multiplexer, and the first combiner is connected with the plurality of second power dividers, and the plurality of second power dividers are connected with the optical wavelength division hybrid demultiplexer.
The optical transmission interface comprises an optical transceiving branching combiner and a multi-directional optical branching combiner, the optical transceiving branching combiner is connected with the multi-directional optical branching combiner, and the multi-directional optical branching combiner is connected with an external optical fiber.
The optical transceiving branching combiner is connected with the optical wavelength division hybrid multiplexer and the optical wavelength division hybrid demultiplexer.
The receiving signal filter in the wireless signal branching unit is connected with the wireless receiver, and the transmitting signal filter in the wireless signal branching unit is connected with the wireless transmitter.
The wireless receiver is connected with the first power divider in the wireless signal adapter, and the wireless transmitter is connected with the first combiner in the wireless signal adapter.
The invention has the advantages that the mechanism such as the wireless signal splitter, the wireless signal adapter, the optical transmission interface and the like is used for realizing the optical fiber repeater transmission processing method and the variable channel transmission type optical fiber repeater, can provide wireless communication relay transmission service for various wireless communication system users in special areas and tunnels, meets the requirements of reducing the number of used optical fibers, greatly improving the system transmission quantity, reducing the mutual interference among systems, meeting the isolation among systems and the like, can realize the long-distance optical transmission relay among the optical fiber repeaters when the optical fibers are cascaded with the optical fiber repeaters, and has the characteristic of being suitable for carrying out relay transmission on various wireless communication systems.
Drawings
FIG. 1 is a frame diagram of the present invention;
FIG. 2 is a schematic diagram of a wireless signal splitter according to the present invention;
FIG. 3 is a schematic diagram of a wireless signal adapter according to the present invention;
FIG. 4 is a schematic structural diagram of an optical transmission interface according to the present invention;
FIG. 5 is a schematic view of the overall structure of the present invention;
description of reference numerals: the optical transmission system comprises a wireless signal splitter 1, a wireless signal adapter 2, an optical wavelength division hybrid multiplexer 3, an optical wavelength division hybrid demultiplexer 4, an optical transmission interface 5, a wireless receiver 6, a wireless transmitter 7, a power division combiner 11, a system filter 12, a duplexer 13, a transmitting signal filter 14, a receiving signal filter 15, a first power divider 21, a first combiner 22, a second combiner 23, a second power divider 24, an optical transceiving branching combiner 51 and a multi-directional optical branching combiner 52.
Detailed Description
The invention will be further explained with reference to the drawings, and the invention provides the following technical solutions: a digital optical fiber repeater transmission system comprises a wireless signal splitter 1, a wireless receiver 6, a wireless transmitter 7, a wireless signal adapter 2, an optical wavelength division hybrid multiplexer 3, an optical wavelength division hybrid demultiplexer 4 and an optical transmission interface 5, wherein the wireless signal splitter 1 is connected with the wireless signal adapter 2 through the wireless receiver 6 and the wireless transmitter 7, and the wireless signal adapter 2 is connected with the optical transmission interface 5 through the optical wavelength division hybrid multiplexer 3 and the optical wavelength division hybrid demultiplexer 4, and is characterized in that the following signal transmission working method is adopted:
s1, processing the output signal of the antenna feed system through a wireless signal splitter 1, and respectively transmitting the received signals of each frequency band to a corresponding wireless receiver 6;
s2, transmitting the transmitting signals of each wireless transmitter 7 to an antenna feed system after filtering, duplex isolation and combination processing;
s3, the output signal of each wireless receiver is digitally coded through an analog-to-digital converter, and then the digital code is sent to the optical fiber transmission channel through different channels of the optical wavelength division hybrid multiplexer 3 and the photoelectric converter;
s4, the output signal of one channel of the optical wavelength division hybrid demultiplexer 4 is restored by a digital signal restorer, then is combined with the output signal of a certain wireless receiver, and then is digitally coded by an analog-to-digital converter, and then is sent out to the optical fiber transmission channel by the other channel of the optical wavelength division hybrid multiplexer 3 and the photoelectric converter;
and S5, recovering and combining the output signals of the two channels of the optical wavelength division hybrid demultiplexer 4 through a digital-to-analog converter, and sending out the combined signals through one wireless transmitter 7.
The wireless signal branching device 1 includes a power dividing/combining device 11, a system filter 12, a duplexer 13, a transmitting signal filter 14 and a receiving signal filter 15, the power dividing/combining device 11, the system filter 12 and the duplexer 13 are sequentially connected, and the duplexer 13 is respectively connected to the transmitting signal filter 14 and the receiving signal filter 15.
The wireless signal adapter 2 includes a plurality of first power dividers 21, a plurality of second power dividers 24, a first combiner 22 and a plurality of second combiners 23, the first power dividers 21 are connected to the plurality of second combiners 23, the plurality of second combiners 23 are connected to the optical wavelength division hybrid multiplexer 3, and the first combiner 22 is connected to the plurality of second power dividers 24, and the plurality of second power dividers 24 are connected to the optical wavelength division hybrid demultiplexer 4.
The optical transmission interface 5 includes an optical transceiving branching/combining device 51 and a multi-directional optical branching/combining device 52, the optical transceiving branching/combining device 51 is connected to the multi-directional optical branching/combining device 52, and the multi-directional optical branching/combining device 52 is connected to an external optical fiber.
The optical transceiving branching combiner 51 is connected with the optical wavelength division multiplexing device 3 and the optical wavelength division multiplexing device 4.
The received signal filter 15 in the wireless signal splitter 1 is connected to the wireless receiver 6, and the transmitted signal filter 14 in the wireless signal splitter 1 is connected to the wireless transmitter 7.
The wireless receiver 6 is connected to the first power divider 21 in the wireless signal adapter 2, and the wireless transmitter 7 is connected to the first combiner 22 in the wireless signal adapter 2.
In the concrete implementation, the output signal of the antenna feed system is processed by power division, duplex isolation and filtering, the received signal of each frequency band is respectively transmitted to the corresponding wireless receiver 6, the transmitting signal of each wireless transmitter 7 is transmitted to the antenna feed system after being processed by filtering, duplex isolation and combining, in the above-mentioned processing process, under the treatment of filter, the frequency band of each wireless system is isolated, the isolation of different working frequency bands between systems is raised, under the isolation of duplexer 13, the receiving and transmitting isolation of each system is raised, under the processing mode of power division and combining, the number of antennas can be reduced, it is convenient to install in special area and tunnel, so that the transmitting signal can be transmitted in the optical transmission system after being processed by digital coding, and each optical fiber repeater uses different wavelength division multiplexing channels in different position segments, the method of changing channels is adopted when optical transmission is relayed.
Claims (7)
1. A digital optical fiber repeater transmission system comprises a wireless signal splitter (1), a wireless receiver (6), a wireless transmitter (7), a wireless signal adapter (2), an optical wavelength division hybrid multiplexer (3), an optical wavelength division hybrid demultiplexer (4) and an optical transmission interface (5), wherein the wireless signal splitter (1) is connected with the wireless signal adapter (2) through the wireless receiver (6) and the wireless transmitter (7), the wireless signal adapter (2) is connected with the optical transmission interface (5) through the optical wavelength division hybrid multiplexer (3) and the optical wavelength division hybrid demultiplexer (4), and the digital optical fiber repeater transmission system is characterized in that the following signal transmission working method is adopted:
s1, processing the output signal of the antenna feed system through a wireless signal splitter (1), and respectively transmitting the received signals of each frequency band to a corresponding wireless receiver (6);
s2, transmitting the transmitting signals of each wireless transmitter (7) to an antenna feed system after filtering, duplex isolation and combination processing;
s3, the output signal of each wireless receiver is digitally coded through an analog-to-digital converter, and then the digital codes are sent to the optical fiber transmission channel through different channels of the optical wavelength division hybrid multiplexer (3) and the photoelectric converter;
s4, recovering the output signal of one channel of an optical wavelength division hybrid demultiplexer (4) through a digital signal restorer, combining the recovered output signal with the output signal of a certain wireless receiver, carrying out digital coding through an analog-to-digital converter, and then sending the output signal to an optical fiber transmission channel through another channel of the optical wavelength division hybrid multiplexer (3) and a photoelectric converter;
and S5, restoring and combining the output signals of the two channels of the optical wavelength division hybrid demultiplexer (4) through a digital-to-analog converter, and then sending out the signals through one wireless transmitter (7).
2. The digital optical fiber repeater transmission system according to claim 1, wherein the wireless signal splitter (1) comprises a power splitter/combiner (11), a system filter (12), a duplexer (13), a transmitting signal filter (14) and a receiving signal filter (15), the power splitter/combiner (11), the system filter (12) and the duplexer (13) are sequentially connected, and the duplexer (13) is respectively connected with the transmitting signal filter (14) and the receiving signal filter (15).
3. The digital optical fiber repeater transmission system according to claim 1, wherein the wireless signal adapter (2) comprises a plurality of first power dividers (21), a plurality of second power dividers (24), a first combiner (22) and a plurality of second combiners (23), the first power divider (21) is connected to the plurality of second combiners (23), the plurality of second combiners (23) is connected to the optical WDM hybrid multiplexer (3), and the first combiner (22) is connected to the plurality of second power dividers (24), and the plurality of second power dividers (24) is connected to the optical WDM hybrid demultiplexer (4).
4. The digital optical repeater transmission system according to claim 1, wherein the optical transmission interface (5) comprises an optical transceiving branching and combining device (51) and a multi-directional optical branching and combining device (52), the optical transceiving branching and combining device (51) is connected with the multi-directional optical branching and combining device (52), and the multi-directional optical branching and combining device (52) is connected with an external optical fiber.
5. The digital optical fiber repeater transmission system according to claim 4, wherein the optical transceiving branching and combining device (51) is connected with the optical WDM hybrid multiplexer (3) and the optical WDM hybrid demultiplexer (4).
6. A digital fiber optic repeater transmission system according to claim 1, wherein the receive signal filter (15) in the wireless signal splitter (1) is connected to the wireless receiver (6) and the transmit signal filter (14) in the wireless signal splitter (1) is connected to the wireless transmitter (7).
7. A digital fiber optic repeater transmission system according to claim 1, wherein the wireless receiver (6) is connected to the first power divider (21) in the wireless signal repeater (2), and the wireless transmitter (7) is connected to the first combiner (22) in the wireless signal repeater (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910417016.5A CN111970062A (en) | 2019-05-20 | 2019-05-20 | Digital processing method for digital optical fiber repeater transmission system |
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| CN201910417016.5A CN111970062A (en) | 2019-05-20 | 2019-05-20 | Digital processing method for digital optical fiber repeater transmission system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160866A (en) * | 2016-09-28 | 2016-11-23 | 成都奥克特科技有限公司 | Optical fiber repeater branch transmission method and by-passing type optical fiber repeater |
| US20200044742A1 (en) * | 2017-01-19 | 2020-02-06 | Comba Telecom Systems (China) Limited | Redundant Backup Near-End Machine, Far-End Machine And System Thereof For Digital Optical Fiber Repeater |
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- 2019-05-20 CN CN201910417016.5A patent/CN111970062A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160866A (en) * | 2016-09-28 | 2016-11-23 | 成都奥克特科技有限公司 | Optical fiber repeater branch transmission method and by-passing type optical fiber repeater |
| US20200044742A1 (en) * | 2017-01-19 | 2020-02-06 | Comba Telecom Systems (China) Limited | Redundant Backup Near-End Machine, Far-End Machine And System Thereof For Digital Optical Fiber Repeater |
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Application publication date: 20201120 |