CN106357310A - Multi-input multi-output signal transmission method and system - Google Patents
Multi-input multi-output signal transmission method and system Download PDFInfo
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- CN106357310A CN106357310A CN201610824337.3A CN201610824337A CN106357310A CN 106357310 A CN106357310 A CN 106357310A CN 201610824337 A CN201610824337 A CN 201610824337A CN 106357310 A CN106357310 A CN 106357310A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a radio frequency remote module, comprising an interface unit for receiving and transmitting baseband signals and a radio frequency remote subunit; the radio frequency remote subunit comprises a signal processing module for connecting with the interface unit, a delay adjusting module for eliminating delay differences of the signals, an amplifying module for amplifying the signals, a filter module for denoising the signals, a transceiving combining module for combining/splitting the signals, and a port for transmitting/receiving the signals. A multi-input multi-output signal transmission system using the radio frequency remote module is also disclosed; a multi-down signal transmission control method and multi-up signal transmission control method based on the multi-input multi-output signal transmission system is also disclosed. The multi-input multi-output signal transmission system is low in manufacture cost and good in stability, and the multi-input multi-output signal transmission method implemented based on the system enables signal coverage to be effectively improved.
Description
Technical field
The present invention relates to moving communicating field, more particularly, to a kind of MIMO signal transmission method and system.
Background technology
Mobile communication covers and is divided into outdoor cover and two kinds of in-door covering, and outdoor and small-sized building cover substantially by macro base station
Complete to cover, large buildings in-door covering is completed by indoor distributed system, there is also greatly in scenes such as residential quarters in recent years
The outdoor distribution of amount covers, and indoor distribution covering system and outdoor distributed coverage system are referred to as distributed coverage system.
Existing passive distributed coverage system is typically completed using single radio-frequency cable and single-polarized antenna, will allow existing nothing
Source distribution system realizes mimo(multiple-input and multiple-output) technology, typically there are two methods.One kind is to increase according to mimo port number
Plus radio-frequency cable way and antenna amount；One kind is conversion system, principle be by frequency identical mimo signal frequency conversion be difference
Frequency Hou Yong mono- road radio-frequency cable be transmitted, finally to after antenna frequency conversion be original frequency after carried out by different antennas
Cover, this mode can be described as mimo frequency conversion distributed coverage system.This mimo frequency conversion distributed coverage system generally includes conduct
The base station of information source, the antenna of signal far-end, between described base station and antenna transmission signal transmission channel, and be arranged on biography
The access unit of the side near described base station for the defeated passage and be arranged on the far-end unit near described antenna side for the transmission channel.
Mimo frequency conversion distributed coverage system can be divided into various modes again, respectively as shown in Figure 1, Figure 2, Figure 3 and Figure 4.Wherein
The feature Shi You mono- tunnel not frequency conversion of pattern 1 shown in Fig. 1, but its shortcoming is frequency variation signal and not frequency variation signal has delay inequality, meeting
Mimo performance is led to decline to a great extent, in the case that especially distribution covers commonly used 2 × 2mimo indoors.Pattern shown in Fig. 2
2 feature Shi You mono- tunnel not frequency conversion, but in order to adjust delay inequality, when access unit increased a time delay adjusting module adjustment
Prolong, to solve the adverse effect brought because of delay inequality, but its shortcoming is time delay adjusting module needs to bear high-power, not only cost
High and to realize difficulty very big.The feature Shi You mono- tunnel not frequency conversion of pattern 3 shown in Fig. 3, in order to adjust delay inequality, in far-end unit
Increased the time delay of time delay adjusting module adjustment not frequency variation signal, but its shortcoming many, high cost that is quantity and in polyphyly
Integration road increased other system link load, the covering of impact other system.The feature of pattern 4 shown in Fig. 4 is all of the port
All carry out frequency conversion, therefore there is not delay inequality problem, but its shortcoming is high cost and increased other in multisystem mixing
System link is lost, the covering of impact other system.
Above four kinds of mimo frequency conversion distributed coverage systems all fail to meet the requirement of existing mobile communication, for this reason, it may be necessary to one
Plant the frequency conversion distributed coverage system that performance is more preferable, cost is lower, with the more preferable application supporting mimo technology.
Content of the invention
The purpose of the present invention is for overcoming the deficiencies in the prior art, proposing a kind of MIMO signal transmission method,
And the distributed coverage system of application the method, this system cost is cheap, system stability is good, and effectively improves signal
Coverage effect.
For reaching above technical purpose, the technical solution used in the present invention is as follows:
A kind of many downstream signals transfer control method, it comprises the following steps:
After remaining multiple signals beyond base station Dui Chu mono- road signal carry out time delay adjustment, respectively by remaining multiple signals described
Frequency conversion is the signal of different frequency；
By the signal after described frequency conversion and it is combined rear downlink transfer without the signal of frequency conversion；
The combining signal that transmission is come carries out branch；
Line frequency reduction will be entered through remaining multiple signals described in frequency conversion after branch, all each roads signal is transmitted separately to phase
The antenna answered continues traveling downwardly.
Further, base band signal process is realized in described base station and remote radio is processed, and descending described multiple signals exist
Carry out carrying out time delay adjustment when remote radio is processed.
Further, the multiple signals after described combining pass through in radio-frequency cable, optical fiber, coaxial cable and passive device
One kind or combination realize transmission.Preferably, the multiple signals after described combining pass through wall scroll radio-frequency cable and at least one nothing
Transmission realized by source device.
Selectively, described descending multiple signals all synchronize process before combining process and after branch process
To ensure the signal of antenna end and the signal synchronization of base station end.
A kind of many uplink signal transmissions control method, it comprises the following steps:
Remaining multiple signals beyond receiving Chu mono- road signal by different antennae are carried out the signal that frequency conversion is different frequency；
By the signal after described frequency conversion and it is combined rear uplink without the signal of frequency conversion；
The combining signal that transmission is come carries out entering line frequency reduction after branch respectively；
In base station, all each road signal after going back primary frequency is carried out respectively with time delay to adjust to eliminate between the signal of described each road
Delay inequality.
Further, base band signal process is realized in described base station and remote radio is processed, and up described multiple signals exist
Carry out carrying out time delay adjustment when remote radio is processed.
Further, the multiple signals after described combining pass through in radio-frequency cable, optical fiber, coaxial cable and passive device
One kind or combination realize transmission.Preferably, the multiple signals after described combining pass through wall scroll radio-frequency cable and at least one nothing
Transmission realized by source device.
Selectively, described up multiple signals all synchronize process before combining process and after branch process
To ensure the signal of antenna end and the signal synchronization of base station end.
A kind of radio frequency remoto module, it is included the interface unit for receiving and sending baseband signal and is connected with described interface unit
The remote radio subelement connecing, described remote radio subelement includes the signal processing mould for being connected with described interface unit
Block, for eliminate signal the time delay adjusting module of delay inequality, for signal is amplified power amplifier module, for signal
Carry out noise reduction filtration module, for being combined to signal/the transmitting-receiving combining module of branch, and be used for sending/receive letter
Number port.
Preferably, described interface unit is received by optical fiber and sends baseband signal.
Further, described signal processing module includes processing mould for processing the sending signal treating descending baseband signal
Block and the receipt signal processing module treating up radiofrequency signal for process.
Further, described time delay adjusting module includes the descending time delay adjustment of the delay inequality for adjusting downstream signal
Module and the uplink time delay adjusting module for adjusting the delay inequality of upward signal.
Specifically, described power amplifier module is the descending power amplifier module that downstream signal is amplified；Described filtration module is
Upward signal is carried out with the up low noise amplification module of noise reduction.Preferably, described descending power amplifier module and up low noise amplification module divide
It is not connected with described transmitting-receiving combining module.
It is highly preferred that this radio frequency remoto module is provided with multiple described remote radio subelements, described interface unit with multiple
Described remote radio subelement connects, the port of the corresponding transmission/receipt signal of each described remote radio subelement.
A kind of signal transmission system of multiple-input and multiple-output, it include base station as information source, the antenna of signal far-end, described
The transmission channel of transmission signal between base station and antenna, and it is arranged on the access list of transmission channel one end near described base station
Unit and the far-end unit being arranged on transmission channel one end near described antenna, described base station includes baseband processing module and radio frequency
Far-pulling module, wherein, described radio frequency remoto module is using any one radio frequency remoto module foregoing.
Described access unit realizes the frequency processing of the signal of base station end: described access unit include multiple corresponding to each
First frequency conversion subelement of the port of described radio frequency remoto module, each described first frequency conversion subelement includes downstream signal is entered
The descending frequency-variable module of row frequency conversion and the upstream frequency recovery module that upward signal is entered with line frequency reduction.Pass for realizing combining
Defeated, described access unit also includes connecting the first multifrequency combining of multiple described first frequency conversion subelements and described transmission channel
Device.
Described far-end unit realizes the frequency processing of the signal of antenna end: described far-end unit include multiple corresponding to each
Second frequency conversion subelement of antenna, each described second frequency conversion subelement includes downstream signal is entered with the downlink frequency of line frequency reduction
Rate recovery module and the up frequency-variable module that upward signal is carried out with frequency conversion.For realizing mixed transfer, described far-end unit also wraps
Include the second multiplefrequency mixer connecting multiple described second frequency conversion subelements and described transmission channel.
For adapting to the use of tdd standard base station, described access unit and far-end unit are also included to upward signal and descending
Signal synchronizes the synchronization module of process.
For realizing the long-distance transmissions of signal, described transmission channel is radio-frequency cable, optical fiber, coaxial cable and passive device
One of or combination.Preferably, described transmission channel includes wall scroll radio-frequency cable and at least one passive device.
Compared with prior art, the present invention has the advantage that
First, the MIMO signal transmission method of the present invention and system, are provided with time delay adjusting module in base station, in base station
The elimination of delay inequality is realized at end, and the performance of this system can be substantially improved；
Secondly, the MIMO signal transmission method of the present invention and system, are arranged on the time delay adjusting module in base station, profit
With one section of program code it is achieved that manufacture, transformation and maintenance cost are very low, and in multisystem mixing, to other system
Loss impact little；
Finally, the MIMO signal transmission method of the present invention and system, arranges time delay adjusting module in base station, it is to avoid
Use more active module embedded thereins in system, not only allow system more stable, and will not affect because of the fault of active module embedded therein many
The coverage effect of input multi output.
Brief description
Fig. 1 is a road signal not frequency conversion in prior art, does not adjust the multiple-input and multiple-output co-cable transmission system of delay inequality
Structural representation.
Fig. 2 is a road signal not frequency conversion in prior art, near-end adjusts the multiple-input and multiple-output co-cable transmission system of delay inequality
System structural representation.
Fig. 3 is a road signal not frequency conversion in prior art, far-end adjusts the multiple-input and multiple-output co-cable transmission system of delay inequality
System structural representation.
Fig. 4 is the multiple-input and multiple-output co-cable transmission system structure diagram of all signal frequency conversions in prior art.
Fig. 5 is the structural representation of MIMO signal Transmission system of the present invention.
Fig. 6 is the structural representation of radio frequency remoto module in MIMO signal Transmission system of the present invention.
Fig. 7 is the base station in MIMO signal Transmission system of the present invention is structural representation during tdd base station.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
With reference to the MIMO signal Transmission system of the present invention shown in Fig. 5, it include base station 1 as information source,
The antenna 5 of signal far-end, between described base station 1 and antenna 5 transmission signal transmission channel 3, and be arranged on described transmission
The access unit 2 of passage 3 one end near described base station 1 and be arranged on described transmission channel 3 near one end of described antenna
Far-end unit 4.This Transmission system can achieve that the indoor and outdoor distribution of mobile communication signal covers.
With reference to Fig. 5 and Fig. 6, described base station 1 is by baseband processing module 11(building base band unit,
Bbu) and radio frequency remoto module 12(remote radio unit, rru) distributed base station that forms, it adopts remote radio skill
Art, the baseband processing module in traditional base station and radio frequency processing module is separated from each other, and rru is arranged on closer to antenna
One end, this rru is connected to macro base station or independent Base Band Unit (i.e. bbu) by optical fiber.This distributed base station (bbu
+ rru pattern) volume is less, capacity bigger it is easier to install, also higher to the adaptability of environment.
With reference to Fig. 6, described radio frequency remoto module 12 include interface unit 121 for receiving and sending baseband signal and with
The remote radio subelement 12a composition that described interface unit 121 connects.
Described interface unit 121 is connected with described baseband processing module 11 by optical fiber 13, for receiving and sending base
Band signal.
The remote radio subelement 12a that multiple and described interface unit 121 is connected is set in described radio frequency remoto module 12,
Each described remote radio subelement 12a is by the signal processing module 122 for being connected with described interface unit, for eliminating letter
Number the time delay adjusting module 123 of delay inequality, for signal is amplified power amplifier module, for noise reduction is carried out to signal
Filtration module, for being combined to signal/the transmitting-receiving combining module 126 of branch, and for sending/port of receipt signal
127 compositions.
Described signal processing module 122 is included for processing the sending signal processing module 1221 treating descending baseband signal
With the receipt signal processing module 1222 treating up radiofrequency signal for process.Described sending signal processing module 1221 inputs
End and receipt signal processing module 1222 outfan are connected with described interface unit 121 respectively.
Further, described time delay adjusting module 123 includes being connected with described sending signal processing module 1221 outfan
The delay inequality for adjusting downstream signal descending time delay adjusting module 1231, and with described receipt signal processing module
The uplink time delay adjusting module 1232 of the delay inequality for adjusting upward signal that 1222 inputs connect.
Further, described power amplifier module is the descending power amplifier module 124 that downstream signal is amplified, described in each
Descending power amplifier module 124 input is connected with time delay adjusting module 1231 outfan descending each described；Described filtration module is
Upward signal is carried out with the up low noise amplification module 125 of noise reduction, each described up low noise amplification module 125 outfan and each institute
State uplink time delay adjusting module 1232 input to connect.Described descending power amplifier module 124 outfan and up low noise amplification module 125
Input also respectively described with one transmitting-receiving combining module 126 be connected.
Thus, each described remote radio subelement 12a formation both links:
Downlink: by described sending signal processing module 1221, descending time delay adjusting module 1231, descending power amplifier module 124,
Transmitting-receiving combining module 126 and port 127 form, and it provides after baseband signal is converted into radiofrequency signal and is transmitted down
Line link；
Up-link: by described port 127, transmitting-receiving combining module 126, up low noise amplification module 125, uplink time delay adjusting module
1232 and receipt signal processing module 1222 form, it provides radio signal transmission and the reconvert afterwards that arrives becomes baseband signal
Up-link.
In order that multiple signals can be transmitted by same radio-frequency cable, need to enter in described multiple signals
Carry out frequency conversion, described multiple signals also need to reduce into line frequency after radio-frequency cable before radio-frequency cable.
With continued reference to Fig. 5, described access unit 2 includes n-1 the first change corresponding to described remote radio subelement 12a
Frequency subelement 21(sets the quantity of remote radio subelement as n), and first multiplefrequency mixer 22.Described first frequency conversion
The first son transmitting-receiving combining module 211 and second that unit 21 is included two subports (not shown), is respectively connected with a subport
Son transmitting-receiving combining module 214, also includes being connected to described first son transmitting-receiving combining module 211 and the second son transmitting-receiving combining mould
Descending frequency-variable module 212 between block 214 and upstream frequency recovery module 213.Further, described first son transmitting-receiving combining mould
Block 211 is connected with the port 127 of described remote radio subelement 12a；Described second son transmitting-receiving combining module 214 and described first
Multiplefrequency mixer 22 connects.
As shown in figure 5, described far-end unit 4 includes n-1 the second frequency conversion subelement 42(days corresponding to described antenna 5
The quantity of line is n), and second multiplefrequency mixer 41.Described second frequency conversion subelement 42 includes two subports (does not scheme
Show), the 3rd son transmitting-receiving combining module 421 that is respectively connected with a subport and the 4th sub receive and dispatch combining module 424, also include point
It is not connected to the downstream frequency also grand master pattern between described 3rd son transmitting-receiving combining module 421 and the 4th son transmitting-receiving combining module 424
Block 422 and up frequency-variable module 423.Further, described 3rd son transmitting-receiving combining module 421 and described second multiplefrequency mixer
41 connections；Described 4th son transmitting-receiving combining module 424 is connected with described antenna 5.
With continued reference to Fig. 5, described transmission channel 3 is that the electromagnetic wave for mobile communication signal provides stable and has screen
Cover the transmission medium of function.This transmission channel 3 includes connecting the first passage 31 of described base station 1 and described access unit 2, connects
Described access unit 2 and the second channel 32 of far-end unit 4, and connect the threeway of described far-end unit 4 and described antenna 5
Road 33.Specifically, described first passage 31 be connected to n-1 described remote radio subelement 12a port 127 and with this port
Between the 127 corresponding subports of the first frequency conversion subelement 21；In the present embodiment, this first passage 31 is by transmission line 311 He
Bonder 312 forms, described transmission line 311 is radio-frequency cable, optical fiber, coaxial cable or transmission line known to other wherein it
One, described bonder 312 is one of representative known passive device.Further, described second channel 32 connects
Between first multiplefrequency mixer 22 and the second multiplefrequency mixer 41 of described far-end unit 4 of described access unit 2；In transmission
In compartment system, near base station end, described far-end unit 4 is near antenna end, therefore, described access unit 2 for described access unit 2
Generally distant and far-end unit 4 between, therefore from the convenience of cable wiring manufacture and the stability of signal transmission and safety
Property consider, described second channel 32 generally adopt radio-frequency cable, preferably using wall scroll radio-frequency cable as described second channel 32.More
Further, described third channel 33 is connected to the port of each the second frequency conversion subelement 42 and the correspondence of described far-end unit 4
Antenna 5 between, in the present embodiment, this third channel 33 by transmission line (radio-frequency cable, optical fiber, coaxial cable or other known in
Transmission line) connection, but those skilled in the art are it is to be understood that setting up of this third channel 33 can also be by known in other
Mode realize.
Transmission for optimizing multiple signals controls, and described transmission channel 3 also includes an end being directly connected to described base station 1
The fourth lane 34 of the first multiplefrequency mixer 22 of mouth 127 and described access unit 2, and it is directly connected to described far-end unit 4
The second multiplefrequency mixer 41 and one of antenna 5 Five-channel 35.The taking of described fourth lane 34 and Five-channel 35
If can realize in a known manner.Thus, by the signal of described fourth lane 34 and Five-channel 35 transmission without frequency conversion
Process and frequency reduction treatment.
With reference to Fig. 7, when described base station 1 adopts time division duplex (time division duplexing, tdd) standard,
Described radio frequency remoto module is tdd mode RF far-pulling module 13.In the mobile communication system of tdd pattern, receive and transmit
In the different time-gap of same frequency channel (i.e. carrier wave), in order to ensure that the time separates, receives and transmission channel.Thus, for protecting
The synchronicity of the signal of card base station end and antenna end, described access unit 2 needs to arrange the first synchronization module 23, simultaneously, institute
Stating far-end unit 4 needs to arrange the second synchronization module 43, all enters before multiplefrequency mixer combining is processed and after branch process
Row synchronization process is synchronous with the signal of base station end with the signal ensureing antenna end.
With continued reference to Fig. 5 and Fig. 6, based on the MIMO signal Transmission system of the present invention, the present invention is for multichannel
The control method of signal transmission include to many downstream signals transmission control method and to many upward signals transmission control
Method.Below to illustrating to this two transfer control methods respectively.
Described downstream signal refers generally to send the signal of the reception antenna transmitting to far-end from base station end, when a base station pair
When answering multiple reception antenna, form the downstream signal of multichannel.The transfer control method of many downstream signals comprises the following steps:
(1) downgoing baseband signal is transmitted to radio frequency remoto module 12 from the baseband processing module 11 of described base station 1 by optical fiber 13
Interface unit 121, downgoing baseband signal is divided into n road downgoing baseband signal respectively through each institute by described interface unit 121
State remote radio subelement 12a；
(2) transmit downgoing baseband signal to remote radio subelement 12a each described through described sending signal processing module
1221 process is converted to downlink radio-frequency signal, and this downlink radio-frequency signal sequentially passes through descending time delay adjusting module 1231 and descending
The process of power amplifier module 124, receives and dispatches combining module 126 combining through the downlink radio-frequency signal of time delay adjustment and power amplifier by described
Manage for after primary combining signal with described port 127 for outlet, and will wherein n-1 road by described first passage 31 transmit to
First frequency conversion subelement 21 of described access unit 2；Described in a remaining road, primary combining signal is straight by described fourth lane 34
Connect and transmit to the first multiplefrequency mixer 22；
(3) under described primary combining Signal separator is gone out by the first son transmitting-receiving combining module 211 of described first frequency conversion subelement 21
Row signal, described descending frequency-variable module 212 carries out frequency-conversion processing to the downstream signal isolated；
(4) described first multiplefrequency mixer 22 will be described first without frequency conversion through frequency conversion Hou n-1 road downstream signal and a road
Level combining signal combining is secondary combining signal, and this secondary combining signal is transmitted to described far-end list by described second channel 32
Second multiplefrequency mixer 41 of unit 4；
(5) described second multiplefrequency mixer 41 by described secondary combining Signal separator go out the downstream signal after frequency conversion and without
The primary combining signal of frequency conversion；
(6) described downstream frequency recovery module 422 enters line frequency reduction to described downstream signal after frequency conversion, then passes through
Described third channel 33 continues traveling downwardly to corresponding antenna 5；The described primary combining signal without frequency conversion passes through the described 5th and leads to
Road 35 directly comes downwards to corresponding antenna 5.
Described upward signal refers generally to send the signal transmitting to base station end from reception antenna, when multiple reception antennas correspond to
During one base station, form the upward signal of multichannel.The transfer control method of many upward signals comprises the following steps:
(1) n road upward signal is received by different antennas 5, and wherein the upward signal described in n-1 road passes through described third channel
33 transmit to the second frequency conversion subelement 42 of corresponding far-end unit 4, and upward signal described in a road passes through described Five-channel 35
It is directly transferred to described second multiplefrequency mixer 41；
(2) described transmission is carried out to the upward signal of the second frequency conversion subelement 42 each described by described up frequency-variable module 423
Frequency-conversion processing；
(3) described second multiplefrequency mixer 41 will be described upper without frequency conversion through frequency conversion Hou n-1 road upward signal and a road
Row signal combining is combining signal, then transmits to described access unit 2 this combining signal by described second channel 32
First multiplefrequency mixer 22；
(4) described combining signal is separated again into n road upward signal by described first multiplefrequency mixer 22, and it includes n-1 road warp
Cross the upward signal of frequency-conversion processing and the road upward signal without frequency-conversion processing；
(5) the upstream frequency recovery module 213 of the first frequency conversion subelement 21 of described access unit 2 is to described upper through frequency conversion
Row signal enters line frequency reduction, then goes upward to described base station 1 by described first passage 31；The described up letter without frequency conversion
Number described base station 1 is directly gone upward to by described fourth lane 34；
(6) each remote radio subelement 12a in described base station 1 is corresponding receives upward signal described in a road, described up letter
Number with described port 127 and transmitting-receiving combining module 126 be the entrance described remote radio subelement 12a of entrance, this upward signal according to
The secondary process through described up low noise amplification module 125 and uplink time delay adjusting module 1232, to reduce making an uproar in upward signal
Delay inequality between sound and elimination upward signal；
(7) upward signal through noise reduction and time delay adjustment is changed by radiofrequency signal in described receipt signal processing module 1222
For baseband signal, the up baseband signal in n road is collected by described interface unit 121, and is transferred to base by described optical fiber 13
Tape handling module 11 being analyzed and processing with the signal up to this.
Further, when described base station 1 be tdd standard base station when, for ensure up-downgoing frequency variation signal transmitting receive with
Base station signal is synchronous, enter described access unit 2 up-downgoing frequency variation signal need same using described first synchronization module 23
Step is processed；The up-downgoing frequency variation signal entering described far-end unit 4 needs the synchronization process using described second synchronization module 43
(as shown in Figure 7).
In sum, the signal transmission system of multiple-input and multiple-output of the present invention is cheap, system stability is good, and is based on
The method for transmitting signals of the multiple-input and multiple-output that this system is realized effectively improves the coverage effect of signal.
Above-described embodiment is the present invention preferably embodiment, but is not merely restricted to the described embodiments, other
Any spirit without departing from the present invention and the change made under principle, modification, replacement, combine, simplify, all should be equivalent
Substitute mode, is all contained within protection scope of the present invention.
Claims (25)
1. a kind of many downstream signals transfer control method is it is characterised in that it comprises the following steps:
After remaining multiple signals beyond base station Dui Chu mono- road signal carry out time delay adjustment, respectively by remaining multiple signals described
Frequency conversion is the signal of different frequency；
By the signal after described frequency conversion and it is combined rear downlink transfer without the signal of frequency conversion；
The combining signal that transmission is come carries out branch；
Line frequency reduction will be entered through remaining multiple signals described in frequency conversion after branch, all each roads signal is transmitted separately to phase
The antenna answered continues traveling downwardly.
2. as claimed in claim 1 many downstream signals transfer control method it is characterised in that: baseband signal is realized in described base station
Process and remote radio is processed, descending described multiple signals are carrying out carrying out time delay adjustment when remote radio is processed.
3. as claimed in claim 1 many downstream signals transfer control method it is characterised in that: the multiple signals after described combining
Transmission is realized by one of radio-frequency cable, optical fiber, coaxial cable and passive device or combination.
4. as claimed in claim 3 many downstream signals transfer control method it is characterised in that: the multiple signals after described combining
Transmission is realized by wall scroll radio-frequency cable and at least one passive device.
5. as claimed in claim 1 many downstream signals transfer control method it is characterised in that: described descending multiple signals exist
The signal all synchronizing process before combining is processed and after branch process to ensure antenna end is synchronous with the signal of base station end.
6. a kind of many uplink signal transmissions control method is it is characterised in that it comprises the following steps:
Remaining multiple signals beyond receiving Chu mono- road signal by different antennae are carried out the signal that frequency conversion is different frequency；
By the signal after described frequency conversion and it is combined rear uplink without the signal of frequency conversion；
The combining signal that transmission is come carries out entering line frequency reduction after branch respectively；
In base station, all each road signal after going back primary frequency is carried out respectively with time delay to adjust to eliminate between the signal of described each road
Delay inequality.
7. as claimed in claim 6 many uplink signal transmissions control method it is characterised in that: baseband signal is realized in described base station
Process and remote radio is processed, up described multiple signals are carrying out carrying out time delay adjustment when remote radio is processed.
8. as claimed in claim 6 many uplink signal transmissions control method it is characterised in that: the multiple signals after described combining
Transmission is realized by one of radio-frequency cable, optical fiber, coaxial cable and passive device or combination.
9. as claimed in claim 8 many uplink signal transmissions control method it is characterised in that: the multiple signals after described combining
Transmission is realized by wall scroll radio-frequency cable and at least one passive device.
10. as claimed in claim 6 many uplink signal transmissions control method it is characterised in that: described up multiple signals
The signal all synchronizing process before combining process and after branch process to ensure antenna end is same with the signal of base station end
Step.
A kind of 11. radio frequency remoto modules it is characterised in that: it include interface unit for receiving and sending baseband signal and with
The remote radio subelement that described interface unit connects, described remote radio subelement is included for being connected with described interface unit
Signal processing module, for eliminating the time delay adjusting module of delay inequality of signal, for power amplifier mould that signal is amplified
Block, for signal carried out noise reduction filtration module, for being combined to signal/the transmitting-receiving combining module of branch, Yi Jiyong
Port in transmission/receipt signal.
12. radio frequency remoto modules as claimed in claim 11 it is characterised in that: described interface unit is received by optical fiber and sends out
Send baseband signal.
13. radio frequency remoto modules as claimed in claim 11 it is characterised in that: described signal processing module is included for processing
Treat the sending signal processing module of descending baseband signal and process mould for processing the receipt signal treating up radiofrequency signal
Block.
14. radio frequency remoto modules as claimed in claim 11 it is characterised in that: described time delay adjusting module is included for adjusting
The descending time delay adjusting module of the delay inequality of downstream signal and the uplink time delay adjustment mould for adjusting the delay inequality of upward signal
Block.
15. radio frequency remoto modules as claimed in claim 11 it is characterised in that: described power amplifier module is that downstream signal is carried out
The descending power amplifier module amplifying；Described filtration module is the up low noise amplification module that upward signal is carried out with noise reduction.
16. radio frequency remoto modules as claimed in claim 15 it is characterised in that: described descending power amplifier module and up LNA
Module is connected with described transmitting-receiving combining module respectively.
17. radio frequency remoto modules as claimed in claim 11 it is characterised in that: this radio frequency remoto module is provided with multiple described penetrate
Frequency zooms out subelement, and described interface unit is connected with multiple described remote radio subelements, each described remote radio subelement
The port of a corresponding transmission/receipt signal.
A kind of 18. signal transmission systems of multiple-input and multiple-output, it include base station as information source, the antenna of signal far-end,
The transmission channel of transmission signal between described base station and antenna, and it is arranged on transmission channel connecing near one end of described base station
Enter unit and be arranged on the far-end unit of transmission channel one end near described antenna, described base station include baseband processing module and
Radio frequency remoto module it is characterised in that: described radio frequency remoto module is using as described in claim 11～17 any one
Radio frequency remoto module.
The signal transmission system of 19. multiple-input and multiple-outputs as claimed in claim 18 it is characterised in that: described access unit bag
Include multiple the first frequency conversion subelements corresponding to the port of radio frequency remoto module each described, each described first frequency conversion subelement
Enter the upstream frequency also grand master pattern of line frequency reduction including the descending frequency-variable module that downstream signal is carried out with frequency conversion with to upward signal
Block.
The signal transmission system of 20. multiple-input and multiple-outputs as claimed in claim 19 it is characterised in that: described access unit is also
Including the first multiplefrequency mixer connecting multiple described first frequency conversion subelements and described transmission channel.
The signal transmission system of 21. multiple-input and multiple-outputs as claimed in claim 18 it is characterised in that: described far-end unit bag
Include multiple the second frequency conversion subelements corresponding to each antenna, each described second frequency conversion subelement includes downstream signal is carried out
The downstream frequency recovery module of frequency reduction and the up frequency-variable module that upward signal is carried out with frequency conversion.
The signal transmission system of 22. multiple-input and multiple-outputs as claimed in claim 21 it is characterised in that: described far-end unit is also
Including the second multiplefrequency mixer connecting multiple described second frequency conversion subelements and described transmission channel.
The signal transmission system of 23. multiple-input and multiple-outputs as claimed in claim 18 it is characterised in that: described access unit and
Far-end unit also includes upward signal and downstream signal are synchronized with the synchronization module of process.
The signal transmission system of 24. multiple-input and multiple-outputs as claimed in claim 18 it is characterised in that: described transmission channel is
One of radio-frequency cable, optical fiber, coaxial cable and passive device or combination.
The signal transmission system of 25. multiple-input and multiple-outputs as claimed in claim 24 it is characterised in that: described transmission channel bag
Include wall scroll radio-frequency cable and at least one passive device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610824337.3A CN106357310B (en) | 2016-09-14 | 2016-09-14 | Multiple input multiple output signal transmission method and system |
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| CN201610824337.3A CN106357310B (en) | 2016-09-14 | 2016-09-14 | Multiple input multiple output signal transmission method and system |
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| CN106357310B CN106357310B (en) | 2023-05-12 |
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| CN107819483A (en) * | 2017-11-02 | 2018-03-20 | 京信通信系统（中国）有限公司 | Signal transmitting apparatus and its test equipment, repeater communication equipment |
| CN109547105A (en) * | 2017-09-22 | 2019-03-29 | 罗森伯格（上海）通信技术有限公司 | A kind of communication equipment for realizing MIMO transmission |
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| WO2023050551A1 (en) * | 2021-09-30 | 2023-04-06 | 京信网络系统股份有限公司 | Remote transmission coverage method and system, and remote unit |
| CN114286355A (en) * | 2021-12-30 | 2022-04-05 | 陕西天基通信科技有限责任公司 | Active remote unit and indoor coverage system based on same |
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| CN106357310B (en) | 2023-05-12 |
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