CN104320790B - A kind of TDD LTE multiple-input and multiple-output indoor covering systems - Google Patents
A kind of TDD LTE multiple-input and multiple-output indoor covering systems Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
- H04W16/20—Network planning tools for indoor coverage or short range network deployment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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Abstract
The present invention provides a kind of TDD LTE multiple-input and multiple-output indoor covering systems, and the system includes：The active near-end machine and distal end active antenna being connected with RRU antenna port direct-couplings, it is attached between the active near-end machine and distal end active antenna by an indoor signal compartment system；The present invention uses the directional coupler and upward signal amplitude limiting processing of high directivity, solves the problems, such as traditional envelope detection level triggers synchronization scenario uplink interference.And the scheme of uplink and downlink sharing frequency converter is employed, under conditions of not sacrificial system performance, simplify circuit design, sufficiently lower equipment cost, improve product cost.
Description
Technical field
The present invention relates to technical field of communication equipment, more particularly to a kind of TDD-LTE multiple-input and multiple-outputs in-door covering system
System.
Background technology
With the development of information technology, requirement of the people to the network communications technology improves constantly, including data, voice
With the communication of the high data traffic of the content such as image, to meet higher and higher data communication service requirement, 4G communications Yin Qigao
The technical advantage of speed, growth momentum is more and more faster in recent years.The TD-LTE that current China is greatly developing (drill for a long time by timesharing
Enter) 4G communications, the development of its commercial network and industrial chain also reaches its maturity.Multiple-input and multiple-output (Multiple-Input
Multiple-Output, MIMO) one of key technology of the antenna technology as 4G LTE communication standards, it is in transmitting terminal and connects
Receiving end sends and receives data using multiple antennas respectively, to improve the capacity of channel, while can also improve the reliable of channel
Property, reduce the bit error rate.But current traditional 2G, 3G indoor covering systems are all to use single-input single-output (Single-Input
Single-Output, SISO) mode, currently, for existing Indoor Coverage Reconstruction, mainly using frequency conversion transmission
Scheme, it is that first via signal is kept into constant directly transmission, by the by taking the binary channels mimo system of current mainstream applications as an example
Two road signal frequency conversions carry out alien frequencies transmission to a different frequency range.
For being to maintain the reality with base station equipment using one of variable-frequency solutions TD-LTE indoor covering systems, its key technology
When it is synchronous, and there is the envelope detection level triggers synchronization scenario of larger cost advantage at present, exist when up output signal compared with
Qiang Shi, the up-downgoing synchronously detected can be disturbed to judge, cause Synchronization Control to miss the problem of switching, reliability is poor.
A kind of " signal transmission realizing method, the apparatus and system of multiple-input and multiple-output " is disclosed in the prior art, sees public affairs
The number of opening is：102882573A, publication date are：2013-01-16 Chinese patent；It is more that the inventive embodiments provide a kind of multi input
Signal transmission realizing method, the apparatus and system of output, including：The N roads sent to base station or multi-input/output antenna array
Frequency identical signal generates the modulated signal that N roads frequency differs after being modulated, and utilizes same feeder line distribution system
System is transmitted.The modulated signal that can also be differed to the N roads frequency transmitted in the feeder line compartment system is demodulated into N roads frequency
Rate identical signal, and access base station or multi-input/output antenna array, it is double based on the time-division so as to solve in the prior art
In the signals transmission of work multiple-input and multiple-output, sending or receive N roads frequency identical signal needs by N number of different feedback
Line compartment system is transmitted, and the problem of complicated is realized in caused signal transmission.The envelope detection level triggers of the patent are synchronous
Scheme, exist when up output signal is stronger, Synchronization Control can be caused to switch by mistake；And application scheme is made for uplink interference
Further circuit optimization, greatly promotes synchronous interference free performance.
A kind of " MIMO frequency conversion systems are divided in new TD-LTE rooms " is also disclosed in the prior art, sees Publication No.：
202535360U, publication date are：2012-11-14 Chinese patent；A kind of achievable frequency conversion system of the invention and base station it is complete
Complete synchronous or delay minimum, the new TD-LTE rooms of interference of the other systems to the system are avoided to divide MIMO frequency conversion systems,
Including near-end machine and remote termination, the near-end machine output end is connected with remote termination input through feeder system, the near-end machine
Including the same radiofrequency signal Transfer pipe of multiplex mode, combiner and Surveillance center's unit, the remote termination includes closing
The same radiofrequency signal transfer passage of road device, multiplex mode, antenna and Surveillance center's unit, passed by detecting radiofrequency signal
Send the envelope of radiofrequency signal descending in passage, through the shaping of envelope shaping unit be sent into control unit, with control unit built in work
Operation mode contrasts, and control unit selectes mode of operation output Synchronization Control code again, makes the transmitting-receiving of indoor MIMO frequency conversion systems synchronous.
The patent is individually designed using up-downgoing frequency converter；And present specification is directed to TDD-LTE tdd systems, present specification
Employ uplink and downlink sharing frequency converter.
The content of the invention
The technical problem to be solved in the present invention, it is to provide in a kind of TDD-LTE (time division duplex) multiple-input and multiple-outputs room
Covering system, using the directional coupler and upward signal amplitude limiting processing of high directivity, solve traditional envelope detection level and touch
The problem of sending out synchronization scenario uplink interference.
What the present invention was realized in：A kind of TDD-LTE multiple-input and multiple-outputs indoor covering system, the system include：
The active near-end machine and distal end active antenna being connected with RRU antenna port direct-couplings, the active near-end machine and distal end are active
It is attached between antenna by an indoor signal compartment system；
The active near-end machine includes：First wave filter, the second wave filter, the 3rd wave filter, the first directional coupler,
One envelope detection and synchronous control unit, the first up amplifying unit, the first descending amplifying unit, the first RF switches, the 2nd RF
Switch, the first converter unit and the first combining/shunt；Distal end active antenna includes：Second combining/shunt, the 4th filter
Ripple device, the 5th wave filter, the 6th wave filter, the 7th wave filter, the second converter unit, the second directional coupler, the inspection of the second envelope
Involve synchronous control unit, the second up amplifying unit, the second descending amplifying unit, the 3rd RF switches, the 4th RF switches, second
Converter unit, mimo antenna one and mimo antenna two；
The port 1 of the RRU antenna ports is connected with the second wave filter, and the second wave filter and the 3rd wave filter are with first
Combining/shunt connection；The port 2 of RRU antenna ports is connected through the first wave filter with the first directional coupler, the first orientation coupling
Clutch connects with the first envelope detection and synchronous control unit, the first RF switches respectively；First RF switch respectively with the first envelope
Detection and synchronous control unit, the first up amplifying unit, the first descending amplifying unit connection；First up amplifying unit,
One descending amplifying unit and the 2nd RF switches connect, and the first up amplifying unit, the first descending amplifying unit, the 2nd RF switches are equal
It is connected with the first envelope detection and synchronous control unit；2nd RF switches are connected through the first converter unit with the 3rd wave filter；The
One combining/shunt is connected through indoor signal compartment system with the second combining/shunt；
Second combining/shunt is connected through the 5th wave filter with mimo antenna one；Second combining/shunt,
4th wave filter, the second converter unit, the second directional coupler, the 3rd RF switches are sequentially connected；Second directional coupler is through
Six wave filters are connected with the second envelope detection and synchronous control unit；3rd RF switches respectively with the second up amplifying unit, the
Two descending amplifying unit connections；4th RF switches filter with the second up amplifying unit, the second descending amplifying unit, the 7th respectively
Device connects；Second envelope detection and synchronous control unit switch with the 3rd RF switches, the second up amplifying unit, the 4th RF respectively
Connection；7th wave filter is connected with mimo antenna two；Pass through active near-end machine, the active day of indoor signal compartment system and distal end
The cooperation of line, it is up anti-interference in the envelope detection level triggers method of synchronization so as to realize.
Further, first wave filter, the second wave filter, the 3rd wave filter are filtered using the band logical of high rejection ability
Ripple device, for filtering out with outer garbage signal；The first directional coupler directional couple receives descending input signal；Described first
Envelope detection and synchronous control unit include RF detection circuit, envelope signal shaping circuit and the synchronization being sequentially connected
Control unit, the envelope detection tracking to downstream signal is realized, and up-downgoing judgement is carried out with a threshold level triggering, finally
Export synchronization control signal；The first up amplifying unit includes numerical-control attenuator, rear class amplifying unit, amplitude limit
Device, wherein limiter be used for when upward signal is excessive exceed rated output power when, limiter quickly opens control, it is ensured that finally it is defeated
Go out power without departing from rated power, avoid disturbing the first envelope detection and synchronous control unit because up output signal is excessive,
Cause synchronism switching maloperation；First descending amplifying unit includes numerical-control attenuator, drive amplification unit；First RF is opened
Close, the 2nd RF switches realize that the signal transmitting and receiving of the uplink downlink of time division duplex standard switches；First converter unit includes mixing
Device, local oscillation circuit；First combining/shunt, which is realized, passes through the TDD-LTE downstream signals of the non-frequency conversion of the first via and the second tunnel
Distal end active antenna is transferred to through feeder line after the TDD-LTE downstream signal combinings crossed after frequency conversion, and by distal end active antenna through feedback
The two-way TDD-LTE upward signals that line transmits arrive the non-frequency conversion channel of the first via and the second tunnel frequency conversion channel after separation.
Further, the 4th wave filter, the 5th wave filter, the 6th wave filter, the 7th wave filter are suppressed using high
The bandpass filter of ability, for filtering out with outer garbage signal；The second directional coupler directional couple receives descending input
Signal；Second envelope detection and synchronous control unit and the first envelope detection and the 26S Proteasome Structure and Function phase of synchronous control unit
Together；Second combining/shunt is realized the two-way TDD-LTE downstream signals that active near-end machine transmits through feeder line through dividing
The non-frequency conversion channel of the first via and the second tunnel frequency conversion channel are arrived from rear, and by the non-frequency conversion TDD-LTE upward signals of the first via and second
After TDD-LTE upward signal combinings of the road after frequency conversion active near-end machine is transported to through feeder line；The second up amplification is single
Member includes LNA unit, numerical-control attenuator, intermediate amplifying unit, the limiter being sequentially connected；The second descending amplification is single
Member includes numerical-control attenuator, drive amplification unit, the power amplifier unit being sequentially connected；The 3rd RF switches, the 4th RF switches are real
Divide the signal transmitting and receiving switching of the uplink downlink of duplex system now；Second converter unit includes frequency mixer, local oscillation circuit；It is described
Mimo antenna one and mimo antenna two are designed using vertically and horizontally dual polarization, are greatly improved with realizing in compact space
Irrelevance between mimo antenna double-channel signal.
Further, the cooperation by active near-end machine, indoor signal compartment system and distal end active antenna, from
And realize up anti-interference in the envelope detection level triggers method of synchronization, it is specially：
In active near-end machine, the TDD-LTE downstream signals that the non-frequency conversion channel of the first via exports RRU ports 1 pass through second
Wave filter band logical is filtered out with after outer useless noise signal, the feeder line by the first combining/shunt by indoor signal compartment system
It is conveyed to distal end active antenna；And the signal distally to come is gone out into the non-frequency conversion of the first via through the first combining/demultiplexer separates
TDD-LTE upward signals, then it is conveyed to RRU ports 1 after the second wave filter bandpass filtering；
Second tunnel is frequency conversion channel, and its TDD-LTE downstream signal for exporting RRU ports 2 passes through the first wave filter band logical
The first directional coupler is output to after filtering, then coupled signal is defeated by the first envelope by the coupling aperture of the first directional coupler
Detection and synchronous control unit, analogue envelope signal is exported by RF detection circuit, then waveform is carried out by high-speed comparator
After Shape correction, as needed for the first uplink and downlink amplifying unit of synchronization control unit conversion output, the 2nd RF switch modules
Up-downgoing transceiving switch-over control signal；
When TDD-LTE RRU are operated in descending, the first RF switches switch to downlink, while open first and descending put
Big unit, close the first up amplifying unit；The TDD-LTE downstream signals that RRU ports 2 export are by the first wave filter, first
Directional coupling circuits, then enter the first descending amplifying unit through the first RF switches, i.e., put after numerical-control attenuator into driving
Big unit amplifies, then enters frequency mixer frequency-conversion processing through the 2nd RF switches, and the frequency variation signal is input to the 3rd wave filter and carries out band
Pass filter, then to the first combining/shunt together with after the TDD-LTE downstream signal combinings of the non-frequency conversion of the first via via indoor letter
Number compartment system is conveyed to distal end active antenna；Similarly, when up work, the first RF switches switch to up-link, simultaneously
The first up amplifying unit is opened, closes the first descending amplifying unit；The upward signal transmitted by distal end active antenna, warp
First combining/demultiplexer separates go out the second road frequency variation signal, revert to original by the 3rd filter filtering, frequency mixer frequency conversion successively
Carrying out the TDD-LTE upward signals of frequency range, the 2nd RF is switched, numerical-control attenuator, rear class amplifying unit, limiter, the first RF switches,
First directional coupler, the first wave filter are output to TDD-LTE RRU ports 2；
In the active antenna equipment of distal end, the non-frequency conversion channel of the first via is defeated by active near-end machine by the second combining/shunt
The TDD-LTE downstream signals of the non-frequency conversion of the first via are isolated in the signal brought, then after the 5th wave filter bandpass filtering
It is output to mimo antenna one and is transmitted into the area of coverage；Similarly, the upward signal that mimo antenna one receives passes through the 5th filter filtering
Afterwards, it is conveyed to active near-end machine through indoor signal compartment system after the second combining/shunt combining；
Second tunnel frequency conversion channel, first active near-end machine is conveyed in the signal to come through the second combining/shunt and isolated
By the 4th filter filtering after second road frequency variation signal, the TDD- that frequency mixer frequency-conversion processing reverts to original frequency range is entered back into
LTE downstream signals, then export coupled signal to the 6th filter filtering by the coupling aperture of the second directional coupler, then to
Two envelope detections and synchronous control unit, i.e., analogue envelope signal is exported by RF detection circuit, then by high-speed comparator
After carrying out waveform shaping processing, the second uplink and downlink amplifying unit of output is changed by synchronization control unit, the 2nd RF is switched
Up-downgoing transceiving switch-over control signal needed for module；
When being operated in descending, the first RF switches switch to downlink, while open the second descending amplifying unit, close
Second up amplifying unit；The Signal separator that the conveying of active near-end machine comes first is gone out into the second tunnel through the second combining/shunt to become
By the 4th filter filtering after frequency signal, the descending letters of TDD-LTE that frequency mixer frequency-conversion processing reverts to original frequency range are entered back into
Number, then enter the second descending amplifying unit by the second directional coupler, the 3rd RF switches, i.e., enter after numerical-control attenuator
Drive amplification unit amplifies, then carries out high-power amplification by power amplifier unit, then is filtered by the 4th RF switches to the 7th wave filter
Mimo antenna two is output to after ripple and is transmitted into the area of coverage；Similarly, when being operated in up, the TDD-LTE of the reception of mimo antenna two
Upward signal is transported to the second up amplifying unit progress low noise after the 7th filter filtering, through the 4th RF switches and put
Greatly, i.e., successively by LNA unit, numerical-control attenuator, intermediate amplifying unit, limiter, then by the 3rd RF switches, second
It is the second road frequency variation signal that directional coupler, which inputs to frequency mixer frequency conversion, after the 4th filter filtering, then through the second combining/
After shunt combining, active near-end machine is transported to by indoor signal compartment system.
Further, the system also includes various parameters inquiry, the control that near-end monitoring module completes active near-end machine
And fault management capability；And complete the transmitting-receiving Communication Control to distal end active antenna；Can also the active near-end machine state of remote transmission
Information is to Surveillance center, and Surveillance center can realize that the control to active near-end machine parameters is set.
Further, the system also includes various parameters inquiry, the control that remote monitoring module completes distal end active antenna
System and fault management capability, and by indoor signal compartment system transmission realization and the receipts of the near-end monitoring module of active near-end machine
Hair communication.
The invention has the advantages that：The system of the present invention includes：What is be connected with RRU antenna port direct-couplings is active near
Terminal and distal end active antenna, carried out between the active near-end machine and distal end active antenna by an indoor signal compartment system
Connection；The present invention uses the directional coupler and upward signal amplitude limiting processing of high directivity, solves traditional envelope detection level
The problem of triggering synchronization scenario uplink interference.And the scheme of uplink and downlink sharing frequency converter is employed, in not sacrificial system performance
Under the conditions of, simplify circuit design, sufficiently lower equipment cost, improve product cost.
Brief description of the drawings
Fig. 1 is the active near-end machine theory diagram of TDD-LTE multiple-input and multiple-output indoor covering systems.
Fig. 2 is TDD-LTE multiple-input and multiple-output indoor covering systems distal end active antenna theory diagram.
Fig. 3 is the detailed schematic block diagram of active near-end machine.
The detailed schematic block diagram of Fig. 4 distal ends active antenna.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, a kind of TDD-LTE multiple-input and multiple-outputs indoor covering system of the invention, the system
System includes：The active near-end machine and distal end active antenna being connected with RRU antenna port direct-couplings, the active near-end machine with it is remote
It is attached between the active antenna of end by an indoor signal compartment system；
The active near-end machine includes：First wave filter, the second wave filter, the 3rd wave filter, the first directional coupler,
One envelope detection and synchronous control unit, the first up amplifying unit, the first descending amplifying unit, the first RF switches, the 2nd RF
Switch, the first converter unit and the first combining/shunt；Distal end active antenna includes：Second combining/shunt, the 4th filter
Ripple device, the 5th wave filter, the 6th wave filter, the 7th wave filter, the second converter unit, the second directional coupler, the inspection of the second envelope
Involve synchronous control unit, the second up amplifying unit, the second descending amplifying unit, the 3rd RF switches, the 4th RF switches, second
Converter unit, mimo antenna one and mimo antenna two；
The port 1 of the RRU antenna ports is connected with the second wave filter, and the second wave filter and the 3rd wave filter are with first
Combining/shunt connection；The port 2 of RRU antenna ports is connected through the first wave filter with the first directional coupler, the first orientation coupling
Clutch connects with the first envelope detection and synchronous control unit, the first RF switches respectively；First RF switch respectively with the first envelope
Detection and synchronous control unit, the first up amplifying unit, the first descending amplifying unit connection；First up amplifying unit,
One descending amplifying unit and the 2nd RF switches connect, and the first up amplifying unit, the first descending amplifying unit, the 2nd RF switches are equal
It is connected with the first envelope detection and synchronous control unit；2nd RF switches are connected through the first converter unit with the 3rd wave filter；The
One combining/shunt is connected through indoor signal compartment system with the second combining/shunt；
Second combining/shunt is connected through the 5th wave filter with mimo antenna one；Second combining/shunt,
4th wave filter, the second converter unit, the second directional coupler, the 3rd RF switches are sequentially connected；Second directional coupler is through
Six wave filters are connected with the second envelope detection and synchronous control unit；3rd RF switches respectively with the second up amplifying unit, the
Two descending amplifying unit connections；4th RF switches filter with the second up amplifying unit, the second descending amplifying unit, the 7th respectively
Device connects；Second envelope detection and synchronous control unit switch with the 3rd RF switches, the second up amplifying unit, the 4th RF respectively
Connection；7th wave filter is connected with mimo antenna two；Pass through active near-end machine, the active day of indoor signal compartment system and distal end
The cooperation of line, it is up anti-interference in the envelope detection level triggers method of synchronization so as to realize.
First wave filter, the second wave filter, the 3rd wave filter use the bandpass filter of high rejection ability, are used for
Filter out with outer garbage signal；The first directional coupler directional couple receives descending input signal, and to up output signal
Be coupled to receive very little；First envelope detection and synchronous control unit include RF detection circuit, the envelope being sequentially connected
Signal transformation circuit and synchronization control unit, the envelope detection tracking to downstream signal is realized, and with a thresholding electricity
Flat triggering carries out up-downgoing judgement, final output synchronization control signal；The first up amplifying unit includes numerical control
Attenuator, rear class amplifying unit, limiter, wherein limiter be used for when upward signal is excessive exceed rated output power when, limit
Width device quickly opens control, it is ensured that final power output avoids disturbing because up output signal is excessive without departing from rated power
One envelope detection and synchronous control unit, cause synchronism switching maloperation；First descending amplifying unit includes numerical-control attenuator, driven
Dynamic amplifying unit；The first RF switches, the 2nd RF switches realize that the signal transmitting and receiving of the uplink downlink of time division duplex standard is cut
Change；First converter unit includes frequency mixer, local oscillation circuit；First combining/shunt is realized the non-frequency conversion of the first via
After the TDD-LTE downstream signal combinings of TDD-LTE downstream signals and the second tunnel after frequency conversion through feeder line be transferred to distal end it is active
Antenna, and the two-way TDD-LTE upward signals that distal end active antenna is transmitted through feeder line are unchanged to the first via after separation
Frequency passage and the second tunnel frequency conversion channel.
4th wave filter, the 5th wave filter, the 6th wave filter, the 7th wave filter use the band logical of high rejection ability
Wave filter, for filtering out with outer garbage signal；The second directional coupler directional couple receives descending input signal, and to upper
Row output signal is coupled to receive very little；Second envelope detection and synchronous control unit and the first envelope detection and synchronous control
The 26S Proteasome Structure and Function of unit processed is identical；Second combining/shunt realizes transmit active near-end machine through feeder line two
Road TDD-LTE downstream signals arrive the non-frequency conversion channel of the first via and the second tunnel frequency conversion channel after separation, and by the non-frequency conversion of the first via
After the TDD-LTE upward signal combinings of TDD-LTE upward signals and the second tunnel after frequency conversion active near-end is transported to through feeder line
Machine；The second up amplifying unit includes LNA unit, numerical-control attenuator, intermediate amplifying unit, the amplitude limit being sequentially connected
Device；The second descending amplifying unit includes numerical-control attenuator, drive amplification unit, the power amplifier unit being sequentially connected；Described
Three RF switches, the 4th RF switches realize the signal transmitting and receiving switching of the uplink downlink of time division duplex standard；Second converter unit bag
Include frequency mixer, local oscillation circuit；The mimo antenna one and mimo antenna two are designed using vertically and horizontally dual polarization, to realize
The irrelevance between mimo antenna double-channel signal is greatly improved in compact space.
As shown in Figure 3 and Figure 4, wherein, it is described to pass through active near-end machine, the active day of indoor signal compartment system and distal end
The cooperation of line, it is up anti-interference in the envelope detection level triggers method of synchronization so as to realize, be specially：
In active near-end machine, the TDD-LTE downstream signals that the non-frequency conversion channel of the first via exports RRU ports 1 pass through second
Wave filter band logical is filtered out with after outer useless noise signal, the feeder line by the first combining/shunt by indoor signal compartment system
It is conveyed to distal end active antenna；And the signal distally to come is gone out into the non-frequency conversion of the first via through the first combining/demultiplexer separates
TDD-LTE upward signals, then it is conveyed to RRU ports 1 after the second wave filter bandpass filtering；
Second tunnel is frequency conversion channel, and its TDD-LTE downstream signal for exporting RRU ports 2 passes through the first wave filter band logical
The first directional coupler is output to after filtering, then coupled signal is defeated by the first envelope by the coupling aperture of the first directional coupler
Detection and synchronous control unit, analogue envelope signal is exported by RF detection circuit, then waveform is carried out by high-speed comparator
After Shape correction, as needed for the first uplink and downlink amplifying unit of synchronization control unit conversion output, the 2nd RF switch modules
Up-downgoing transceiving switch-over control signal；
When TDD-LTE RRU are operated in descending, the first RF switches switch to downlink, while open first and descending put
Big unit, close the first up amplifying unit；The TDD-LTE downstream signals that RRU ports 2 export are by the first wave filter, first
Directional coupling circuits, then enter the first descending amplifying unit through the first RF switches, i.e., put after numerical-control attenuator into driving
Big unit amplifies, then enters frequency mixer frequency-conversion processing through the 2nd RF switches, and the frequency variation signal is input to the 3rd wave filter and carries out band
Pass filter, then to the first combining/shunt together with after the TDD-LTE downstream signal combinings of the non-frequency conversion of the first via via indoor letter
Number compartment system is conveyed to distal end active antenna；Similarly, when up work, the first RF switches switch to up-link, simultaneously
The first up amplifying unit is opened, closes the first descending amplifying unit；The upward signal transmitted by distal end active antenna, warp
First combining/demultiplexer separates go out the second road frequency variation signal, revert to original by the 3rd filter filtering, frequency mixer frequency conversion successively
Carrying out the TDD-LTE upward signals of frequency range, the 2nd RF is switched, numerical-control attenuator, rear class amplifying unit, limiter, the first RF switches,
First directional coupler, the first wave filter are output to TDD-LTE RRU ports 2；
The system also includes various parameters inquiry, control and the fault management that near-end monitoring module completes active near-end machine
Function；And complete the transmitting-receiving Communication Control to distal end active antenna；Can also the active near-end machine status information of remote transmission to monitoring
Center, and Surveillance center can realize that the control to active near-end machine parameters is set.
As shown in figure 4, in the active antenna equipment of distal end, the non-frequency conversion channel of the first via, will have by the second combining/shunt
The TDD-LTE downstream signals of the non-frequency conversion of the first via are isolated in the signal that source near-end machine conveying comes, then by the 5th wave filter
Mimo antenna one is output to after bandpass filtering and is transmitted into the area of coverage；Similarly, the upward signal that mimo antenna one receives passes through the 5th
After filter filtering, active near-end machine is conveyed to through indoor signal compartment system after the second combining/shunt combining；
Second tunnel frequency conversion channel, first active near-end machine is conveyed in the signal to come through the second combining/shunt and isolated
By the 4th filter filtering after second road frequency variation signal, the TDD- that frequency mixer frequency-conversion processing reverts to original frequency range is entered back into
LTE downstream signals, then export coupled signal to the 6th filter filtering by the coupling aperture of the second directional coupler, then to
Two envelope detections and synchronous control unit, i.e., analogue envelope signal is exported by RF detection circuit, then by high-speed comparator
After carrying out waveform shaping processing, the second uplink and downlink amplifying unit of output is changed by synchronization control unit, the 2nd RF is switched
Up-downgoing transceiving switch-over control signal needed for module；
When being operated in descending, the first RF switches switch to downlink, while open the second descending amplifying unit, close
Second up amplifying unit；The Signal separator that the conveying of active near-end machine comes first is gone out into the second tunnel through the second combining/shunt to become
By the 4th filter filtering after frequency signal, the descending letters of TDD-LTE that frequency mixer frequency-conversion processing reverts to original frequency range are entered back into
Number, then enter the second descending amplifying unit by the second directional coupler, the 3rd RF switches, i.e., enter after numerical-control attenuator
Drive amplification unit amplifies, then carries out high-power amplification by power amplifier unit, then is filtered by the 4th RF switches to the 7th wave filter
Mimo antenna two is output to after ripple and is transmitted into the area of coverage；Similarly, when being operated in up, the TDD-LTE of the reception of mimo antenna two
Upward signal is transported to the second up amplifying unit progress low noise after the 7th filter filtering, through the 4th RF switches and put
Greatly, i.e., successively by LNA unit, numerical-control attenuator, intermediate amplifying unit, limiter, then by the 3rd RF switches, second
It is the second road frequency variation signal that directional coupler, which inputs to frequency mixer frequency conversion, after the 4th filter filtering, then through the second combining/
After shunt combining, active near-end machine is transported to by indoor signal compartment system.
The system also includes various parameters inquiry, control and the failure pipe that remote monitoring module completes distal end active antenna
Function is managed, and realizes by the transmission of indoor signal compartment system and is communicated with the transmitting-receiving of the near-end monitoring module of active near-end machine.
Although the foregoing describing the embodiment of the present invention, those familiar with the art should manage
Solution, the specific embodiment described by us are merely exemplary, rather than for the restriction to the scope of the present invention, are familiar with this
The equivalent modification and change that the technical staff in field is made in the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (5)
1. a kind of TDD-LTE multiple-input and multiple-outputs indoor covering system, it is characterised in that the system includes：With RRU antenna ends
The active near-end machine and distal end active antenna of mouth direct-coupling connection, pass through between the active near-end machine and distal end active antenna
One indoor signal compartment system is attached；
The active near-end machine includes：First wave filter, the second wave filter, the 3rd wave filter, the first directional coupler, the first bag
Network detection and synchronous control unit, the first up amplifying unit, the first descending amplifying unit, the first RF are switched, the 2nd RF is switched,
First converter unit and the first combining/shunt；Distal end active antenna includes：Second combining/shunt, the 4th wave filter,
5th wave filter, the 6th wave filter, the 7th wave filter, the second converter unit, the second directional coupler, the second envelope detection and same
Walk control unit, the second up amplifying unit, the second descending amplifying unit, the 3rd RF switches, the 4th RF switches, the second frequency conversion list
Member, mimo antenna one and mimo antenna two；
The port 1 of the RRU antenna ports is connected with the second wave filter, and the second wave filter and the 3rd wave filter close with first
Road/shunt connection；The port 2 of RRU antenna ports is connected through the first wave filter with the first directional coupler, the first directional couple
Device connects with the first envelope detection and synchronous control unit, the first RF switches respectively；First RF switches are examined with the first envelope respectively
Involve synchronous control unit, the first up amplifying unit, the first descending amplifying unit connection；First up amplifying unit, first
Descending amplifying unit and the 2nd RF switch connect, the first up amplifying unit, the first descending amplifying unit, the 2nd RF switch with
First envelope detection and synchronous control unit connection；2nd RF switches are connected through the first converter unit with the 3rd wave filter；First
Combining/shunt is connected through indoor signal compartment system with the second combining/shunt；
Second combining/shunt is connected through the 5th wave filter with mimo antenna one；Second combining/shunt, the 4th
Wave filter, the second converter unit, the second directional coupler, the 3rd RF switches are sequentially connected；Second directional coupler is through the 6th filter
Ripple device is connected with the second envelope detection and synchronous control unit；3rd RF switch respectively with the second up amplifying unit, second
Row amplifying unit connects；4th RF switches connect with the second up amplifying unit, the second descending amplifying unit, the 7th wave filter respectively
Connect；Second envelope detection and synchronous control unit connect with the 3rd RF switches, the second up amplifying unit, the 4th RF switch respectively
Connect；7th wave filter is connected with mimo antenna two；Pass through active near-end machine, indoor signal compartment system and distal end active antenna
Cooperation, it is up anti-interference in the envelope detection level triggers method of synchronization so as to realize；
The cooperation by active near-end machine, indoor signal compartment system and distal end active antenna, so as to realize that envelope is examined
It is up anti-interference in the ripple level triggers method of synchronization, be specially：
In active near-end machine, the TDD-LTE downstream signals that the non-frequency conversion channel of the first via exports RRU ports 1 are by the second filtering
Device band logical is filtered out with after outer useless noise signal, is conveyed by the first combining/shunt by the feeder line of indoor signal compartment system
Give distal end active antenna；And the signal distally to come is gone out to the TDD-LTE of the non-frequency conversion of the first via through the first combining/demultiplexer separates
Upward signal, then it is conveyed to RRU ports 1 after the second wave filter bandpass filtering；
Second tunnel is frequency conversion channel, and its TDD-LTE downstream signal for exporting RRU ports 2 passes through the first wave filter bandpass filtering
After be output to the first directional coupler, then coupled signal is defeated by the first envelope detection by the coupling aperture of the first directional coupler
And synchronous control unit, analogue envelope signal is exported by RF detection circuit, then waveform shaping is carried out by high-speed comparator
After processing, as upper needed for the first uplink and downlink amplifying unit of synchronization control unit conversion output, the 2nd RF switch modules
Descending transceiving switch-over control signal；
When TDD-LTE RRU are operated in descending, the first RF switches switch to downlink, while it is single to open the first descending amplification
Member, close the first up amplifying unit；The TDD-LTE downstream signals that RRU ports 2 export are by the first wave filter, the first orientation
Termination power, then enter the first descending amplifying unit through the first RF switches, i.e., enter drive amplification list after numerical-control attenuator
Member amplification, then enter frequency mixer frequency-conversion processing through the 2nd RF switches, the frequency variation signal is input to the 3rd wave filter and carries out band logical filter
Ripple, then divide to the first combining/shunt together with after the TDD-LTE downstream signal combinings of the non-frequency conversion of the first via via indoor signal
Distribution system is conveyed to distal end active antenna；When up work, the first RF switches switch to up-link, while open on first
Row amplifying unit, close the first descending amplifying unit；The upward signal transmitted by distal end active antenna, through the first combining/
Demultiplexer separates go out the second road frequency variation signal, revert to original frequency range by the 3rd filter filtering, frequency mixer frequency conversion successively
TDD-LTE upward signals, the 2nd RF switches, numerical-control attenuator, rear class amplifying unit, limiter, the first RF switches, the first orientation
Coupler, the first wave filter are output to TDD-LTE RRU ports 2；
In the active antenna equipment of distal end, the non-frequency conversion channel of the first via, active near-end machine was conveyed by the second combining/shunt
The TDD-LTE downstream signals of the non-frequency conversion of the first via are isolated in the signal come, then are exported after the 5th wave filter bandpass filtering
The area of coverage is transmitted into mimo antenna one；The upward signal that mimo antenna one receives is after the 5th filter filtering, by the
After two combinings/shunt combining active near-end machine is conveyed to through indoor signal compartment system；
Second tunnel frequency conversion channel, first active near-end machine is conveyed in the signal to come through the second combining/shunt and isolates second
By the 4th filter filtering after the frequency variation signal of road, enter back under the TDD-LTE that frequency mixer frequency-conversion processing reverts to original frequency range
Row signal, then export coupled signal to the 6th filter filtering by the coupling aperture of the second directional coupler, then to the second bag
Network detection and synchronous control unit, i.e., analogue envelope signal is exported by RF detection circuit, then entered by high-speed comparator
After row _ _ waveform shaping processing, the second uplink and downlink amplifying unit of output is changed by synchronization control unit, the 2nd RF is switched
Up-downgoing transceiving switch-over control signal needed for module；
When being operated in descending, the first RF switches switch to downlink, while open the second descending amplifying unit, close second
Up amplifying unit；The Signal separator that the conveying of active near-end machine comes first is gone out into the second tunnel frequency conversion letter through the second combining/shunt
By the 4th filter filtering after number, the TDD-LTE downstream signals that frequency mixer frequency-conversion processing reverts to original frequency range are entered back into, then
Enter the second descending amplifying unit by the second directional coupler, the 3rd RF switches, i.e., enter driving after numerical-control attenuator
Amplifying unit amplifies, then carries out high-power amplification by power amplifier unit, then after the 4th RF switches to the 7th filter filtering
It is output to mimo antenna two and is transmitted into the area of coverage；When being operated in up, the TDD-LTE upward signals that mimo antenna two receives pass through
After crossing the 7th filter filtering, it is transported to the second up amplifying unit through the 4th RF switches and carries out low noise amplification, i.e., pass through successively
LNA unit, numerical-control attenuator, intermediate amplifying unit, limiter are crossed, then it is defeated by the 3rd RF switches, the second directional coupler
It is the second road frequency variation signal to enter to frequency mixer frequency conversion, after the 4th filter filtering, then through the second combining/shunt combining
Afterwards, active near-end machine is transported to by indoor signal compartment system.
A kind of 2. TDD-LTE multiple-input and multiple-outputs indoor covering system according to claim 1, it is characterised in that：It is described
First wave filter, the second wave filter, the 3rd wave filter use the bandpass filter of high rejection ability, for filtering out with outer useless
Signal；The first directional coupler directional couple receives descending input signal；First envelope detection and Synchronization Control list
Member includes RF detection circuit, envelope signal shaping circuit and the synchronization control unit being sequentially connected, and realizes to descending
The envelope detection tracking of signal, and up-downgoing judgement, the control of final output synchronization are carried out with a threshold level triggering
Signal；The first up amplifying unit includes numerical-control attenuator, rear class amplifying unit, limiter, and wherein limiter is used to work as
Upward signal is excessive when exceeding rated output power, and limiter opens control, it is ensured that final power output is kept away without departing from rated power
Exempt to disturb the first envelope detection and synchronous control unit because up output signal is excessive, cause synchronism switching maloperation；First
Descending amplifying unit includes numerical-control attenuator, drive amplification unit；The first RF switches, the 2nd RF switches realize time division duplex
The signal transmitting and receiving switching of the uplink downlink of standard；First converter unit includes frequency mixer, local oscillation circuit；First combining/
Shunt realizes the TDD-LTE downstream signals by the TDD-LTE downstream signals and the second tunnel of the non-frequency conversion of the first via after frequency conversion
Distal end active antenna is transferred to through feeder line after combining, and on the two-way TDD-LTE that distal end active antenna is transmitted through feeder line
Row signal arrives the non-frequency conversion channel of the first via and the second tunnel frequency conversion channel after separation.
A kind of 3. TDD-LTE multiple-input and multiple-outputs indoor covering system according to claim 2, it is characterised in that：It is described
4th wave filter, the 5th wave filter, the 6th wave filter, the 7th wave filter use the bandpass filter of high rejection ability, are used for
Filter out with outer garbage signal；The second directional coupler directional couple receives descending input signal；The second envelope inspection _ _
It is identical with the 26S Proteasome Structure and Function of the first envelope detection and synchronous control unit to involve synchronous control unit；Second combining/point
Road device realizes that the two-way TDD-LTE downstream signals for transmitting active near-end machine through feeder line arrive the non-frequency conversion of the first via after separation
Passage and the second tunnel frequency conversion channel, and the TDD- by the non-frequency conversion TDD-LTE upward signals of the first via and the second tunnel after frequency conversion
After LTE upward signal combinings active near-end machine is transported to through feeder line；The second up amplifying unit is low including being sequentially connected
Make an uproar and put unit, numerical-control attenuator, intermediate amplifying unit, limiter；The second descending amplifying unit includes the number being sequentially connected
Control attenuator, drive amplification unit, power amplifier unit；The 3rd RF switches, the 4th RF switches realize the upper of time division duplex standard
The signal transmitting and receiving switching of downlink；Second converter unit includes frequency mixer, local oscillation circuit；The mimo antenna one and MIMO days
Line two is designed using vertically and horizontally dual polarization, is improved with realizing in compact space between mimo antenna double-channel signal not
Correlation.
A kind of 4. TDD-LTE multiple-input and multiple-outputs indoor covering system according to claim 3, it is characterised in that：It is described
System also includes various parameters inquiry, control and the fault management capability that near-end monitoring module completes active near-end machine；And complete
Transmitting-receiving Communication Control to distal end active antenna；Can also the active near-end machine status information of remote transmission to Surveillance center, and monitor
Center can realize that the control to active near-end machine parameters is set.
A kind of 5. TDD-LTE multiple-input and multiple-outputs indoor covering system according to claim 4, it is characterised in that：It is described
System also includes remote monitoring module and completes various parameters inquiry, control and the fault management capability of distal end active antenna, and passes through
The transmission of indoor signal compartment system is crossed to realize and the transmitting-receiving of the near-end monitoring module of active near-end machine communication.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711181981.4A CN107786990A (en) | 2014-10-21 | 2014-10-21 | A kind of TDD LTE multiple-input and multiple-output indoor covering methods |
| CN201711181968.9A CN107889120B (en) | 2014-10-21 | 2014-10-21 | Indoor coverage system for improving TDD-LTE uplink interference immunity |
| CN201410562363.4A CN104320790B (en) | 2014-10-21 | 2014-10-21 | A kind of TDD LTE multiple-input and multiple-output indoor covering systems |
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| CN201410562363.4A CN104320790B (en) | 2014-10-21 | 2014-10-21 | A kind of TDD LTE multiple-input and multiple-output indoor covering systems |
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| CN201711181968.9A Division CN107889120B (en) | 2014-10-21 | 2014-10-21 | Indoor coverage system for improving TDD-LTE uplink interference immunity |
| CN201711181981.4A Division CN107786990A (en) | 2014-10-21 | 2014-10-21 | A kind of TDD LTE multiple-input and multiple-output indoor covering methods |
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| CN201711181968.9A Active CN107889120B (en) | 2014-10-21 | 2014-10-21 | Indoor coverage system for improving TDD-LTE uplink interference immunity |
| CN201711181981.4A Pending CN107786990A (en) | 2014-10-21 | 2014-10-21 | A kind of TDD LTE multiple-input and multiple-output indoor covering methods |
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| CN106129562A (en) * | 2016-08-29 | 2016-11-16 | 成都奥克特科技有限公司 | Multi-standard base station is with location method of work |
| CN108430065A (en) * | 2018-02-28 | 2018-08-21 | 苏州智汇云祥通信***有限公司 | Multi net voting intelligent cloud covers system |
| CN111342855B (en) * | 2020-03-19 | 2021-06-04 | 复旦大学 | Low-power-consumption receiver for remote backscattering communication system |
| CN116647853B (en) * | 2023-07-26 | 2023-09-22 | 赛尔通信服务技术股份有限公司 | DAS end passive device for enhancing 5G signal power |
| CN116760438B (en) * | 2023-08-07 | 2023-10-20 | 赛尔通信服务技术股份有限公司 | Parallel-serial conversion and enhancement device for 5G multichannel same-frequency MIMO signals |
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| CN202565269U (en) * | 2012-04-26 | 2012-11-28 | 沈昕 | TD-LTE chamber branch MIMO frequency conversion system |
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| Publication number | Publication date |
|---|---|
| CN107889120B (en) | 2021-06-25 |
| CN107889120A (en) | 2018-04-06 |
| CN107786990A (en) | 2018-03-09 |
| CN104320790A (en) | 2015-01-28 |
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