CN109257099A - LTE double channel optical fiber based on catv network, which zooms out to register one's residence, covers system and method - Google Patents
LTE double channel optical fiber based on catv network, which zooms out to register one's residence, covers system and method Download PDFInfo
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- CN109257099A CN109257099A CN201811275845.6A CN201811275845A CN109257099A CN 109257099 A CN109257099 A CN 109257099A CN 201811275845 A CN201811275845 A CN 201811275845A CN 109257099 A CN109257099 A CN 109257099A
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
- H04H20/78—CATV [Community Antenna Television] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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Abstract
The present invention proposes that a kind of LTE double channel optical fiber based on catv network zooms out to register one's residence and covers system and method, comprising: proximal end unit, expanding element and far-end unit；Wherein, one end of proximal end unit is coupled with LTE binary channels base station, and the other end is connected by the optical fiber interface of optical fiber and expanding element.The optical fiber interface of expanding element one end is connected by optical fiber with proximal end unit, and is connected by coaxial cable with catv network, and the other end is connect by coaxial cable with the CATV coaxial cable interface of a plurality of far-end units.Far-end unit one end is equipped with two CATV coaxial cable interfaces, one CATV coaxial cable interface is connected by coaxial cable interface with expanding element, another CATV coaxial cable interface is connected by coaxial cable with original television set, and the far-end unit other end is equipped with the first retransmitting antenna and the second retransmitting antenna.The present invention solves the problems such as ping-pong existing for internal home network signal and the interference of PCI mould 3.
Description
Technical field
The invention belongs to wireless telecom equipment technical field more particularly to a kind of LTE binary channels light based on catv network
Fibre, which zooms out to register one's residence, covers system and method.
Background technique
There is CATV signal in existing cell, hotel, hotel, generally realize that CATV signal is realized using CATV coaxial cable
It registers one's residence covering；The covering and traditional room subsystem is not all registered one's residence, antenna is all on house doorway, and signal is decayed when passing through wall
Seriously, cause indoor signal and extraneous signal field strength to be not much different, generate ping-pong and PCI mould 3 interferes, seriously affect user
Perception；Meanwhile the common people are often sensitive to the installation site of base station (LTE-BTS), it is undesirable to which base station is mounted on daily from itself
Life or the too close place of working environment, this also causes more difficulties to the indoor covering of LTE signal.
Summary of the invention
It is an object of the invention in view of the above shortcomings of the prior art, provide a kind of LTE bilateral based on catv network
Road fiber optic stretch, which is registered one's residence, covers system and method, by LTE signal by fiber optic stretch, solves LTE signal and CATV signal not
The problem of with site, recycles original CATV coaxial cable to carry out signal transmission, realizes the covering of LTE signal, solves movement
The ping-pong and pilot pollution of network signal, improve the perception of user.
The present invention specifically uses following technical scheme:
A kind of LTE double channel optical fiber based on catv network zooms out covering system of registering one's residence characterized by comprising proximal end unit,
Expanding element and far-end unit；
The proximal end unit includes: that first duplexer, the second duplexer, first laser device, second laser and the first wavelength-division are multiple
Use device；The twin-channel first via antenna of LTE base station connects the first wavelength division multiplexer through first duplexer, first laser device；LTE
Twin-channel No. second antenna in base station connects the first wavelength division multiplexer through the second duplexer, second laser；
The expanding element includes: the second wavelength division multiplexer, third laser, the 4th laser, the first up/down frequency converter and conjunction
Road device；The proximal end unit connects the second wavelength division multiplexer by optical fiber；Second wavelength division multiplexer is respectively through third laser
Device and the 4th laser, the first up/down frequency converter are divided into two-way connection combiner；CATV coaxial cable connects combiner；
The far-end unit includes: splitter, the first power amplifier low noise integrated module, the second power amplifier low noise integrated module,
Two up/down frequency converters, third duplexer, the 4th duplexer, first retransmit electric wire and the second retransmitting antenna；The splitter connection
CATV coaxial cable, and retransmit electric wire through the first power amplifier low noise integrated module, third duplexer connection first, through on second/
Low-converter, the second power amplifier low noise integrated module and the 4th duplexer connect the second retransmitting antenna.
Further, each expanding element connects multiple far-end units.
Further, the proximal end unit is coupled with LTE binary channels base station or LTE binary channels base station zoom out system.
Further, the proximal end unit couples LTE binary channels downlink signal, the LTE binary channels in the downlink
Downlink signal respectively enters first laser device through first duplexer, the second duplexer, second laser is converted to 1 optical signal of λ, λ 2
Optical signal；1 optical signal of λ, 2 optical signal of λ respectively enter the first wavelength division multiplexer, and first wavelength division multiplexer believes 1 light of λ
Number, 2 optical signal of λ combining at containing two kinds of different wave lengths (λ 1, λ 2) composite optical signal after be transmitted through the fiber to expanding element
；The proximal end unit receive that expanding element transmission comes from optical fiber in the uplink containing two kinds of different wave lengths (λ 3, λ 4)
Composite optical signal, and be transmitted to the first wavelength division multiplexer, first wavelength division multiplexer will contain two kinds of different wave lengths (λ 3, λ
4) composite optical signal resolves into 3 optical signal of λ, 4 optical signal of λ, and is transmitted separately to first laser device, second laser, described
3 optical signal of λ, 4 optical signal of λ are converted to LTE binary channels LTE uplink signal respectively by first laser device, second laser, through first
Duplexer, the second duplexer are transmitted to LTE binary channels base station or LTE binary channels base station zoom out system.
Further, the expanding element in the downlink by optical fiber receive proximal end unit transmission come contain two kinds
The composite optical signal of different wave length (λ 1, λ 2), and input the second wavelength division multiplexer；Second wavelength division multiplexer will contain two kinds
The composite optical signal of different wave length (λ 1, λ 2) resolves into 1 optical signal of λ, 2 optical signal of λ, and inputs third laser, the 4th respectively
1 optical signal of λ, 2 optical signal of λ are converted to LTE downlink signal LTE1 respectively by laser, the third laser, the 4th laser
With LTE downlink signal LTE2, the intermediate-freuqncy signal that the LTE downlink signal LTE2 is 100MHz through the first up/down frequency converter frequency conversion
Enter combiner afterwards；Equal part after the intermediate-freuqncy signal of LTE downlink signal LTE1,100MHz and CATV signal are combined by the combiner
Output, is sent to far-end unit by CATV coaxial cable；The expanding element connects from CATV coaxial cable in the uplink
The intermediate-freuqncy signal for receiving the CATV signal, LTE uplink signal LTE3 and 80MHz that come from far-end unit transmission enters combiner, institute
State combiner to separate the intermediate-freuqncy signal of CATV signal, LTE uplink signal LTE1 and 80MHz: the CATV signal is sent back to
CATV coaxial cable, the LTE uplink signal LTE3 enter that third laser is converted to 3 optical signal of λ and to input the second wavelength-division multiple
LTE uplink signal LTE4, the LTE uplink are up-converted to through the first up/down frequency converter with the intermediate-freuqncy signal of device, the 80MHz
Signal LTE4 enters the 4th laser and is converted to 4 optical signal of λ and inputs the second wavelength division multiplexer, and the second wavelength division multiplexer is by λ 3
Optical signal, 4 optical signal of λ, which are combined, is transmitted through the fiber to proximal end at after the composite optical signal containing two kinds of different wave lengths (λ 3, λ 4)
Unit.
Further, the far-end unit in the downlink by the CATV signal received by CATV coaxial cable,
The intermediate-freuqncy signal of LTE downlink signal LTE1 and 100MHz inputs splitter, and the splitter is by CATV signal, LTE downlink signal
The intermediate-freuqncy signal of LTE1 and 100MHz is separated；The LTE downlink signal LTE1 inputs the first power amplifier low noise integrated module,
Third duplexer is inputted after power amplification, and interior is covered by the first retransmitting antenna；The intermediate frequency of the 100MHz is believed
Number input the second up/down frequency converter after frequency conversion be LTE downlink signal LTE2, the LTE downlink signal LTE2 pass through the second power amplifier
Low noise integrated module inputs the 4th duplexer after power amplification, is covered by the second retransmitting antenna to interior；It is described
The uplink of far-end unit receives LTE uplink signal LTE3 and LTE by the first retransmitting antenna and the second retransmitting antenna respectively
Uplink signal LTE4, and third duplexer and the 4th duplexer are inputted respectively；The LTE uplink signal LTE3 is through third duplexer
The first power amplifier low noise integrated module is inputted, inputs splitter after uplink low noise amplification；The LTE uplink signal LTE4 warp
4th duplexer inputs the second power amplifier low noise integrated module, after uplink low noise amplification, then inputs the second up/down frequency converter
Splitter is inputted after down-converting to the intermediate-freuqncy signal of 80MHz；The splitter is by amplified LTE uplink signal LTE3,80MHz
Intermediate-freuqncy signal and CATV signal be combined after expanding element is transmitted to by CATV coaxial cable.
The present invention and its preferred embodiment by LTE double-channel signal by zooming out, is solved LTE double-channel signal and
CATV signal, then will be after LTE double-channel signal and the combining of CATV signal and equal part output multi-channel is believed not the same website the problem of
Number, and signal transmission is carried out using original CATV coaxial cable, original catv network signal is not being influenced, while realizing LTE
The covering of registering one's residence of binary channels mobile network signals.It is long to overcome traditional indoor distributed system construction time, property difficult coordination
Equal construction difficult problems.Building time is short, at low cost, and LTE binary channels mobile network signals can pass through original CATV coaxial cable
It enters the room and is covered, to solve the problems such as ping-pong existing for internal home network signal and the interference of PCI mould 3, improve and use
The perceptibility at family.
Detailed description of the invention
The present invention is described in more detail with reference to the accompanying drawings and detailed description:
Fig. 1 is overall structure diagram of the embodiment of the present invention；
Fig. 2 is proximal end of embodiment of the present invention cellular construction schematic diagram；
Fig. 3 is expanding element structural schematic diagram of the embodiment of the present invention；
Fig. 4 is far-end unit structural schematic diagram of the embodiment of the present invention；
Fig. 5 is connection relationship diagram between each unit of the embodiment of the present invention；
In figure: 101- first duplexer；The second duplexer of 201-；102- first laser device；202- second laser；11- first
Wavelength division multiplexer；The second wavelength division multiplexer of 12-；103- third laser；The 4th laser of 203-；204- the first up/down frequency conversion
Device；13- combiner；15- splitter；205- the second up/down frequency converter；106- the first power amplifier low noise integrated module；206-
Two power amplifier low noise integrated modules；107- third duplexer；The 4th duplexer of 207-.
Specific embodiment
For the feature and advantage of this patent can be clearer and more comprehensible, special embodiment below is described in detail below:
As shown in Figure 1, shown in Figure 5, the present embodiment system and device include: include: proximal end unit, expanding element and far-end unit；Wherein,
Proximal end unit is connected with expanding element by optical fiber；Expanding element is connected with far-end unit by CATV coaxial cable.
Wherein, one end of proximal end unit is coupled with LTE binary channels base station or LTE binary channels base station zoom out system, another
The optical fiber interface at end is connected by the optical fiber interface of optical fiber and expanding element.One end of expanding element is equipped with optical fiber interface and CATV
Coaxial cable interface, optical fiber interface are connected by optical fiber with proximal end unit, CATV coaxial cable interface by coaxial cable with
Catv network is connected, and the other end of expanding element is equipped with a plurality of CATV coaxial cable interfaces, and by coaxial cable and again
The CATV coaxial cable interfaces of several far-end units connects, and far-end unit one end is equipped with two CATV coaxial cable interfaces, and one
CATV coaxial cable interface is connected by coaxial cable interface with expanding element, and another CATV coaxial cable interface passes through coaxial
Cable is connected with original television set, and the far-end unit other end is equipped with the first retransmitting antenna and the second retransmitting antenna, to incite somebody to action
Amplified LTE double-channel signal is zoomed out to cover the area of coverage.
As shown in Fig. 2, proximal end unit includes: first duplexer 101, the second duplexer 201, first laser device 102, second
Laser 202 and the first wavelength division multiplexer 11；The twin-channel first via antenna of LTE base station swashs through first duplexer 101, first
Light device 102 connects the first wavelength division multiplexer 11；Twin-channel No. second antenna of LTE base station swashs through the second duplexer 201, second
Light device 202 connects the first wavelength division multiplexer 11.
As shown in figure 3, expanding element include: the second wavelength division multiplexer 12, third laser 103, the 4th laser 203,
First up/down frequency converter 204 and combiner 13；Proximal end unit connects the second wavelength division multiplexer 12 by optical fiber；Second wavelength-division is multiple
Divide to connect for two-way through third laser 103 and the 4th laser 203, the first up/down frequency converter 204 respectively with device 12 and close
Road device 13；CATV coaxial cable connects combiner 13.
As shown in figure 4, far-end unit includes: that splitter 15, the first power amplifier low noise integrated module 106, the second power amplifier are low
Make an uproar integrated module 206, the second up/down frequency converter 205, third duplexer 107, the 4th duplexer 207, first retransmit electric wire and
Second retransmitting antenna；Splitter 15 connects CATV coaxial cable, and through the first power amplifier low noise integrated module 106, third duplex
Electric wire is retransmitted in the connection of device 107 first, through the second up/down frequency converter 205, the second power amplifier low noise integrated module 206 and the 4th pair
Work device 207 connects the second retransmitting antenna.
Proximal end unit couples LTE binary channels downlink signal in the downlink, and LTE binary channels downlink signal is through the first duplex
Device 101, the second duplexer 201 respectively enter first laser device 102, second laser 202 is converted to 1 optical signal of λ, 2 light of λ letter
Number；1 optical signal of λ, 2 optical signal of λ respectively enter the first wavelength division multiplexer 11, and the first wavelength division multiplexer 11 is by 1 optical signal of λ, 2 light of λ
Signal, which is combined, is transmitted through the fiber to expanding element at after the composite optical signal containing two kinds of different wave lengths (λ 1, λ 2)；Proximal end is single
Member receives the complex light letter containing two kinds of different wave lengths (λ 3, λ 4) that expanding element transmission comes from optical fiber in the uplink
Number, and it is transmitted to the first wavelength division multiplexer 11, the first wavelength division multiplexer 11 will contain the complex light of two kinds of different wave lengths (λ 3, λ 4)
Signal decomposition is transmitted separately to first laser device 102, second laser 202, first laser at 3 optical signal of λ, 4 optical signal of λ
3 optical signal of λ, 4 optical signal of λ are converted to LTE binary channels LTE uplink signal respectively by device 102, second laser 202, through first pair
Work device 101, the second duplexer 201 are transmitted to LTE binary channels base station or LTE binary channels base station zoom out system.
Expanding element is arranged on CATV coaxial wire road, and main function is that proximal end unit is arranged directly
Near LTE binary channels base station or LTE binary channels base station zoom out system, so that the position selection of whole system is more clever
It is living, so as to realize the side LTE and side being kept completely separate spatially of registering one's residence.Expanding element is connect by optical fiber in the downlink
The composite optical signal containing two kinds of different wave lengths (λ 1, λ 2) that unit transmission in proximal end comes is received, and inputs the second wavelength division multiplexer 12；
Composite optical signal containing two kinds of different wave lengths (λ 1, λ 2) is resolved into 1 optical signal of λ, 2 optical signal of λ by the second wavelength division multiplexer 12,
And third laser 103, the 4th laser 203 are inputted respectively, third laser 103, the 4th laser 203 respectively believe 1 light of λ
Number, 2 optical signal of λ be converted to LTE downlink signal LTE1 and LTE downlink signal LTE2, LTE downlink signal LTE2 through the first up/down
Enter combiner 13 after the intermediate-freuqncy signal that 204 frequency conversion of frequency converter is 100MHz；Combiner 13 by LTE downlink signal LTE1,
Equal part exports after intermediate-freuqncy signal and CATV the signal combining of 100MHz, is sent to far-end unit by CATV coaxial cable；Extension
Unit receives CATV signal, the LTE uplink signal come from far-end unit transmission from CATV coaxial cable in the uplink
The intermediate-freuqncy signal of LTE3 and 80MHz enters combiner 13, and combiner 13 is by CATV signal, LTE uplink signal LTE1 and 80MHz
Intermediate-freuqncy signal is separated: CATV signal sends CATV coaxial cable back to, and LTE uplink signal LTE3 enters 103 turns of third laser
It is changed to 3 optical signal of λ and inputs the second wavelength division multiplexer 12, the intermediate-freuqncy signal of 80MHz is through 204 up-conversion of the first up/down frequency converter
Enter the 4th laser 203 for LTE uplink signal LTE4, LTE uplink signal LTE4 and is converted to 4 optical signal of λ and the second wave of input
Division multiplexer 12, the second wavelength division multiplexer 12 by 3 optical signal of λ, 4 optical signal of λ combining at contain two kinds of different wave lengths (λ 3, λ 4)
Composite optical signal after be transmitted through the fiber to proximal end unit.
Far-end unit is generally located on the side of registering one's residence of CATV coaxial cable, and far-end unit will pass through CATV in the downlink
The intermediate-freuqncy signal of CATV signal, LTE downlink signal LTE1 and 100MHz that coaxial cable receives inputs splitter 15, splitter
15 separate the intermediate-freuqncy signal of CATV signal, LTE downlink signal LTE1 and 100MHz；LTE downlink signal LTE1 input the
One power amplifier low noise integrated module 106 inputs third duplexer 107, by the first retransmitting antenna to interior after power amplification
It is covered；Frequency conversion is under LTE downlink signal LTE2, LTE after the intermediate-freuqncy signal of 100MHz inputs the second up/down frequency converter 205
Row signal LTE2 inputs the 4th duplexer 207 by the second power amplifier low noise integrated module 206 after power amplification, by the
Two retransmitting antennas cover interior；The uplink of far-end unit is distinguished by the first retransmitting antenna and the second retransmitting antenna
LTE uplink signal LTE3 and LTE uplink signal LTE4 is received, and inputs third duplexer 107 and the 4th duplexer 207 respectively；
LTE uplink signal LTE3 inputs the first power amplifier low noise integrated module 106 through third duplexer 107, through uplink low noise amplification
Splitter 15 is inputted afterwards；LTE uplink signal LTE4 inputs the second power amplifier low noise integrated module 206, warp through the 4th duplexer 207
After uplink low noise amplification, then inputs after the second up/down frequency converter 205 down-converts to the intermediate-freuqncy signal of 80MHz and input splitter
15；Splitter 15 passes through after being combined the intermediate-freuqncy signal of amplified LTE uplink signal LTE3,80MHz and CATV signal
CATV coaxial cable is transmitted to expanding element.
This patent is not limited to above-mentioned preferred forms, anyone can obtain other each under the enlightenment of this patent
The LTE double channel optical fiber based on catv network of kind form, which zooms out to register one's residence, covers system and method, all according to the present patent application patent
The equivalent changes and modifications that range is done should all belong to the covering scope of this patent.
Claims (6)
1. a kind of LTE double channel optical fiber based on catv network zooms out covering system of registering one's residence characterized by comprising proximal end is single
Member, expanding element and far-end unit；
The proximal end unit includes: that first duplexer, the second duplexer, first laser device, second laser and the first wavelength-division are multiple
Use device；The twin-channel first via antenna of LTE base station connects the first wavelength division multiplexer through first duplexer, first laser device；LTE
Twin-channel No. second antenna in base station connects the first wavelength division multiplexer through the second duplexer, second laser；
The expanding element includes: the second wavelength division multiplexer, third laser, the 4th laser, the first up/down frequency converter and conjunction
Road device；The proximal end unit connects the second wavelength division multiplexer by optical fiber；Second wavelength division multiplexer is respectively through third laser
Device and the 4th laser, the first up/down frequency converter are divided into two-way connection combiner；CATV coaxial cable connects combiner；
The far-end unit includes: splitter, the first power amplifier low noise integrated module, the second power amplifier low noise integrated module,
Two up/down frequency converters, third duplexer, the 4th duplexer, first retransmit electric wire and the second retransmitting antenna；The splitter connection
CATV coaxial cable, and retransmit electric wire through the first power amplifier low noise integrated module, third duplexer connection first, through on second/
Low-converter, the second power amplifier low noise integrated module and the 4th duplexer connect the second retransmitting antenna.
2. the LTE double channel optical fiber according to claim 1 based on catv network zooms out covering system of registering one's residence, feature exists
In: each expanding element connects multiple far-end units.
3. the LTE double channel optical fiber according to claim 2 based on catv network zooms out covering system of registering one's residence, feature exists
In: the proximal end unit is coupled with LTE binary channels base station or LTE binary channels base station zoom out system.
4. the LTE double channel optical fiber according to claim 3 based on catv network, which zooms out to register one's residence, covers the covering side of system
Method, it is characterised in that: the proximal end unit couples LTE binary channels downlink signal, the LTE binary channels downlink in the downlink
Signal respectively enters first laser device through first duplexer, the second duplexer, second laser is converted to 1 optical signal of λ, 2 light of λ letter
Number；1 optical signal of λ, 2 optical signal of λ respectively enter the first wavelength division multiplexer, and first wavelength division multiplexer is by 1 optical signal of λ, λ
2 optical signals, which are combined, is transmitted through the fiber to expanding element at after the composite optical signal containing two kinds of different wave lengths (λ 1, λ 2)；Institute
That states that proximal end unit receives that expanding element transmission comes from optical fiber in the uplink answers containing two kinds different wave length (λ 3, λ 4)
Light combination signal, and it is transmitted to the first wavelength division multiplexer, first wavelength division multiplexer will contain two kinds of different wave lengths (λ 3, λ 4)
Composite optical signal resolves into 3 optical signal of λ, 4 optical signal of λ, and is transmitted separately to first laser device, second laser, and described first
3 optical signal of λ, 4 optical signal of λ are converted to LTE binary channels LTE uplink signal respectively by laser, second laser, through the first duplex
Device, the second duplexer are transmitted to LTE binary channels base station or LTE binary channels base station zoom out system.
5. the LTE double channel optical fiber according to claim 4 based on catv network, which zooms out to register one's residence, covers the covering side of system
Method, it is characterised in that: the expanding element in the downlink by optical fiber receive proximal end unit transmission come contain two kinds not
The composite optical signal of co-wavelength (λ 1, λ 2), and input the second wavelength division multiplexer；Second wavelength division multiplexer will be containing two kinds not
The composite optical signal of co-wavelength (λ 1, λ 2) resolves into 1 optical signal of λ, 2 optical signal of λ, and input third laser, the 4th swash respectively
Light device, the third laser, the 4th laser respectively by 1 optical signal of λ, 2 optical signal of λ be converted to LTE downlink signal LTE1 and
LTE downlink signal LTE2, the LTE downlink signal LTE2 are after the first up/down frequency converter frequency conversion is the intermediate-freuqncy signal of 100MHz
Into combiner；The combiner is defeated by equal part after the intermediate-freuqncy signal of LTE downlink signal LTE1,100MHz and the combining of CATV signal
Out, far-end unit is sent to by CATV coaxial cable；The expanding element is received from CATV coaxial cable in the uplink
Intermediate-freuqncy signal to the CATV signal, LTE uplink signal LTE3 and 80MHz that come from far-end unit transmission enters combiner, described
Combiner separates the intermediate-freuqncy signal of CATV signal, LTE uplink signal LTE1 and 80MHz: the CATV signal is sent back to
CATV coaxial cable, the LTE uplink signal LTE3 enter that third laser is converted to 3 optical signal of λ and to input the second wavelength-division multiple
LTE uplink signal LTE4, the LTE uplink are up-converted to through the first up/down frequency converter with the intermediate-freuqncy signal of device, the 80MHz
Signal LTE4 enters the 4th laser and is converted to 4 optical signal of λ and inputs the second wavelength division multiplexer, and the second wavelength division multiplexer is by λ 3
Optical signal, 4 optical signal of λ, which are combined, is transmitted through the fiber to proximal end at after the composite optical signal containing two kinds of different wave lengths (λ 3, λ 4)
Unit.
6. the LTE double channel optical fiber according to claim 5 based on catv network, which zooms out to register one's residence, covers the covering side of system
Method, it is characterised in that: CATV signal, the LTE that the far-end unit will be received in the downlink by CATV coaxial cable
The intermediate-freuqncy signal of downlink signal LTE1 and 100MHz inputs splitter, and the splitter is by CATV signal, LTE downlink signal LTE1
It is separated with the intermediate-freuqncy signal of 100MHz；The LTE downlink signal LTE1 inputs the first power amplifier low noise integrated module, through function
Third duplexer is inputted after rate amplification, interior is covered by the first retransmitting antenna；The intermediate-freuqncy signal of the 100MHz is defeated
Frequency conversion is LTE downlink signal LTE2 after entering the second up/down frequency converter, and the LTE downlink signal LTE2 passes through the second power amplifier low noise
Integrated module inputs the 4th duplexer after power amplification, is covered by the second retransmitting antenna to interior；The distal end
The uplink of unit receives LTE uplink signal LTE3 and LTE uplink by the first retransmitting antenna and the second retransmitting antenna respectively
Signal LTE4, and third duplexer and the 4th duplexer are inputted respectively；The LTE uplink signal LTE3 is inputted through third duplexer
First power amplifier low noise integrated module, inputs splitter after uplink low noise amplification；The LTE uplink signal LTE4 is through the 4th
Duplexer inputs the second power amplifier low noise integrated module, after uplink low noise amplification, then inputs under the second up/down frequency converter and becomes
Splitter is inputted after the intermediate-freuqncy signal that frequency is 80MHz；The splitter will be in amplified LTE uplink signal LTE3,80MHz
Frequency signal and CATV signal by CATV coaxial cable are transmitted to expanding element after being combined.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110958412A (en) * | 2019-12-04 | 2020-04-03 | 中邮科通信技术股份有限公司 | CATV network-based multichannel balanced transmission system |
| CN110958617A (en) * | 2019-12-05 | 2020-04-03 | 北京凯博无线科技有限公司 | Signal transmission system and signal transmission method |
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